• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An assembly (1) of dental prosthetic restoration components comprising a ceramic dental implant (2) with an inner connection housing (3). An internally threaded insert (5) is attached to the inner connection housing (3) of the dental implant (2), is indexed in rotation, and is held there by a fastener (6) forming an axial abutment. opposing extraction of the internally threaded insert (5) from the inner connection housing (3).
    公开号:FR3062052A1
    申请号:FR1750654
    申请日:2017-01-26
    公开日:2018-07-27
    发明作者:Herve Richard
    申请人:Anthogyr SA；
    IPC主号:
    专利说明:

    © Agent (s): CABINET PONCET.
    FR 3 062 052 - A1 (54) ASSEMBLY OF COMPONENTS FOR DENTAL PROSTHETIC RESTORATION.
    (57) Set (1) of components for dental protein restoration, comprising a ceramic dental implant (2) with internal connection housing (3). An internally threaded insert (5) is attached to the internal connection housing (3) of the dental implant (2), is indexed in rotation there, and is held there by a fixing piece (6) forming an axial stop s opposing an extraction of the internally threaded insert (5) from the internal connection housing (3).

    7ü53FDEP.docx
    The present invention relates to the field of dental prosthetic restoration, and more particularly relates to a ceramic dental implant.
    Dental implants made of metallic material such as titanium or a titanium alloy are known, intended to be installed in the maxillary or mandibular bone of a patient, extending along a first longitudinal axis between a proximal end and a distal end , with internal connection housing extending from the distal end and towards the proximal end.
    The internal connection housing is generally internally threaded over a part of its length to receive by screwing a fixing screw intended to ensure the final fixing of a dental component such as a pillar or a transfixed prosthesis core having an external shape substantially tooth-shaped. As a standard, the fixing screw has an external thread with metric profile.
    If the production of an internal thread in the internal connection housing of a metallic dental implant does not pose too much of a problem, it is quite different in the particular case of a ceramic dental implant.
    The machining of ceramic is indeed extremely long because of its high hardness. In addition, the shape of the thread must be modified compared to a standard (metric) thread to limit the stress concentrations that would result from machining with very small radii, especially at the bottom of the thread (risk of crack initiation). The radius for a metric profile thread is indeed very small compared to the pitch. A thread suitable for ceramic thus requires a larger pitch, which increases the risk of accidental unscrewing of the fixing screw, and is also more bulky radially.
    A problem proposed by the present invention is to facilitate the manufacture of a ceramic dental implant, by reducing the risks of weakening thereof and the risks of unscrewing a fixing screw.
    To achieve these and other objects, the invention provides a set of components for dental prosthetic restoration, comprising a ceramic dental implant intended to be installed in the maxillary or mandibular bone of a patient, extending according to a first longitudinal axis between a proximal end and a distal end, with internal connection housing extending from the distal end and towards the proximal end; according to the invention:
    the internal connection housing comprises at least one non-circular cross-section section,
    7ü53FDEP.docx
    - the assembly includes an internally threaded insert, shaped so as to be fitted in the non-circular cross-sectional section of the internal housing for connection of the dental implant by being indexed therein in rotation about the first longitudinal axis,
    - The assembly includes a fastening part with first axial through passage having a cross section of dimensions sufficient for the passage of a threaded element intended to cooperate by screwing with the internally threaded insert, shaped to engage in a radial housing formed in the side wall of the internal connection housing of the dental implant so as to form an axial stop opposing an extraction of the internally threaded insert from the non-circular cross-sectional section of the internal connection housing.
    It is thus possible to produce, in the ceramic implant, an internal connection housing having a side wall devoid of internal thread, the thread (preferably metric) for a fixing screw being provided by the internally threaded insert which is indexed in rotation and retained in the internal connection housing. The implant thus presents reduced risks of incipient fractures.
    Depending on the position of the dental implant fixed in the patient's jaw, it is often necessary to carefully adjust the location of the coronary emergence of the well allowing access to the fixing screw in the dental prosthesis core transfixed in ceramic. In fact, it is a question of being able, despite the limited space available in the patient's mouth, to access the fixing screw with a screwing tool. It is also important that the coronary emergence of the access shaft is placed away from the active parts of the tooth during chewing (for example the cusps).
    To remedy this, it is preferably possible to provide that the assembly further comprises a core of dental prosthesis transfixed into ceramic comprising a second through passage constituted by first and second successive passage sections, said first passage section extending from a proximal end of the dental prosthesis core transfixed along a second longitudinal axis, and said second passage section extending the first passage section so that the first and second passage sections form a non-zero angle between them.
    The dental prosthesis core transfixed into ceramic (machined from a ceramic block or produced by sintering a ceramic powder in particular) is optionally coated by the technician with one or more very light layers of texturing or coloring providing the closest aspect to a tooth
    7053FDEP.docx natural. In combination with the ceramic dental implant, the core of the dental prosthesis transfixed into ceramic forms an assembly providing a visual appearance very close to that of an actual tooth, with no metallic part capable of inducing unnatural shades.
    The angled nature of the second through passage allows the coronary emergence of the access shaft to be placed away from the active parts of the tooth during chewing (cusps).
    A second angular through passage authorizing an insertion and a routing of the fixing screw according to a curved trajectory through the core of the dental prosthesis transfixed into ceramic however requires a fairly significant removal of material in the core of the prosthesis, which weakens greatly its mechanical resistance.
    Furthermore, the practitioner must first have the dental prosthesis core transfixed into ceramic on the dental implant in the patient's mouth, before secondly inserting the fixing screw through the core of dental prosthesis transfixed into ceramic, then proceed to its screwing in a third step. There is thus a high risk of loss and / or accidental swallowing by the patient of the dental prosthesis transfixed into ceramic and / or of the fixing screw.
    To remedy this, it can advantageously be provided that:
    - the assembly includes a fixing screw comprising a screw head from which extends a screw rod provided with a threaded section intended to be received by screwing in said internally threaded insert,
    - the fixing piece extends between a first end, intended to engage in the internal connection housing of the dental implant, and a second end,
    - The first passage section of the transfixed dental prosthesis core has transverse dimensions allowing the reception of the second end of the fixing piece and of the screw head by axial penetration along the second longitudinal axis from the proximal end of the transfixed dental prosthesis core,
    - The screw head and the second end of the fixing piece are shaped so as to cooperate to retain the core of the dental prosthesis transfixed on the dental implant.
    The fixing screw thus does not need to travel through the second passage section of the second angled through passage, which can therefore have smaller dimensions to limit the risks of weakening of the transfixed dental prosthesis core.
    7ü53FDEP.docx
    During his manipulations, the practitioner first engages by screwing the fixing screw in the internally threaded insert which is already retained in the internal connection housing by the fixing part. Then, in a second step, it engages the core of the dental prosthesis transfixed on the second end of the fixing piece and the screw head. The transfixed dental prosthesis core is then temporarily retained on the implant by its fitting on the second end of the fixing part and the screw head. Finally, the practitioner completes fixing the transfixed dental prosthesis core by screwing the fixing screw in a third step. During these manipulations, the risks of loss and / or swallowing of the dental prosthesis transfixed into ceramic and / or of the fixing screw are reduced, because a sub-assembly with integral elements is produced at each step between them at least precariously.
    Advantageously, the second passage section of the dental prosthesis core may have transverse dimensions smaller than those of the first passage section, but sufficient for the passage of a tool making it possible to rotate the fixing screw according to the first. longitudinal axis.
    Preferably, a relative movement in translation of the fixing screw towards the proximal end of the dental implant along the first longitudinal axis causes a radial expansion of the second end of the fixing part.
    This radial expansion provides a simple and satisfactory fixation of the prosthesis core transfixed on the dental implant.
    To further improve this fixation, the dental prosthesis core may include an annular groove intended to receive the second end of the fixing part.
    According to a first possibility, a relative displacement in translation of the fixing screw towards the proximal end of the dental implant along the first longitudinal axis can cause a radial expansion of the second end of the fixing part to engage the second end of the fixing part in the annular groove.
    According to a second possibility, when the first passage section receives the second end of the fixing piece and the screw head by axial penetration along the first longitudinal axis, the second end of the fixing piece can engage in the annular groove reversibly, preferably by snap-fastening.
    In the context of the second possibility, after reception of the second end of the fixing piece in the annular groove, the screw head
    7053FDEP.docx can bear axially against the second end of the fixing part and oppose an extraction of the second end of the fixing part from the annular groove. This prevents any separation of the transfixed dental prosthesis soul from the dental implant in a simple and effective manner.
    As an alternative, it is possible in the context of the second possibility that, after reception of the second end of the fixing part in the annular groove, a relative displacement in translation of the fixing screw towards the proximal end of the dental implant. along the first longitudinal axis causes a radial expansion of the second end of the fastener.
    The latching, obtained when the first passage section receives the second end of the fixing piece and the screw head by axial penetration along the first longitudinal axis, thus does not need to be too strong, so as to allow for the practitioner removal and repositioning without much effort. The transfixed dental prosthesis core can nevertheless be fixed to the dental implant in a reliable manner by the subsequent radial expansion of the second end of the fixing piece caused by the screwing of the fixing screw.
    Advantageously, the annular groove and / or the second end of the fixing piece may have respective contact surfaces shaped so that the radial expansion of the second end of the fixing piece induces, along the first longitudinal axis, pressing of the the proximal end of the denture core toward the distal end of the dental implant.
    Such axial pressing effectively limits the risks of bacteria entering and growing at the interfaces between the transfixed dental prosthesis core and the dental implant (and any intermediate components).
    Preferably, it can be provided that:
    - the first end of the fixing part comprises a first set of longitudinal fins with free distal parts,
    - the second end of the fixing part comprises a second set of longitudinal fins with free distal parts,
    - The first and second sets of longitudinal fins are defined by a plurality of longitudinal slots extending over only part of the length of the fastener and originating alternately from the first end and from the second end, said slots all extending along the same intermediate axial section of the fastener.
    7053FDEP.docx
    Such a fastening piece allows a snap at each of its ends. To obtain an easy snap-on, it is however necessary that the fins have a sufficient length to facilitate their bending: this leads to an increase in the axial size of the fixing piece, and this size is therefore not very compatible with the dental field where space is counted. The fact of providing slots defining the first and second sets of longitudinal fins coming in correspondence of the same intermediate axial section of the fastener makes it possible to significantly reduce the axial size of the fastener while providing easy snaps and effective.
    According to a first possibility, the first end of the fixing piece can be received in the radial housing in an irreversible manner, preferably by snap-fastening. The risks of untimely separation of the attachment piece and the dental implant are thus reduced.
    According to a second possibility, the first end of the fixing piece can be received in the radial housing in a reversible manner, preferably by snap-fastening. The attachment piece can then be later removed from the dental implant if necessary.
    In the context of this second possibility, the first end of the fixing piece and the internally threaded insert can be shaped so that, when the internally threaded insert bears axially against the first end of the fixing piece, this support is opposed to a withdrawal of the first end of the fastener from the radial housing. The attachment piece and the dental implant are thus made inseparable in a simple manner using the fixing screw.
    Alternatively, still in the context of the second possibility, a relative displacement in translation of the internally threaded insert towards the distal end of the dental implant along the first longitudinal axis can cause a radial expansion of the first end of the workpiece. fixation.
    Preferably, the prosthesis core comprises a proximal end shaped to bear directly against the distal end of the dental implant. The number of components is thus limited, and ceramic-on-ceramic contact is obtained, avoiding premature wear phenomena.
    Advantageously, the assembly may include means for indexing in rotation the prosthesis core and the dental implant around the first longitudinal axis.
    7053FDEP.docx
    According to a first possibility, the core of the dental prosthesis may have an outer shape substantially in the form of a tooth preferably obtained by machining a ceramic block or produced by sintering a ceramic powder. Such a dental prosthesis core can optionally be coated by the technician with one or more very light layers of texturing or coloring, providing an appearance closest to a natural tooth.
    According to another possibility, the core of the dental prosthesis can be a ceramic block of substantially cylindrical or prismatic external shape and intended to be machined to obtain an external shape substantially in the form of a tooth (as for example illustrated in documents KR 10- 2013-0097820, US 2012/0251979 and EP 2 837 357).
    Other objects, characteristics and advantages of the present invention will emerge from the following description of particular embodiments, given in relation to the attached figures, among which:
    - Figure 1 is a longitudinal sectional view of a ceramic implant forming part of a first embodiment of the assembly according to the present invention;
    - Figure 2 is a perspective view of an internally threaded insert forming part of the first embodiment of the assembly according to the present invention;
    - Figure 3 is a cross-sectional view of the ceramic implant of Figure 1 in which is housed the internally threaded insert of Figure 2;
    - Figure 4 is a perspective view of a fastener forming part of the first embodiment of the assembly according to the present invention;
    - Figure 5 is a side view of the fastener of Figure 4;
    - Figure 6 is a longitudinal sectional view of the first embodiment of the assembly according to the present invention;
    - Figure 7 is a longitudinal sectional view of the first embodiment of the assembly according to the present invention and a transfixed dental prosthesis core intended to be attached and fixed to the assembly;
    - Figure 8 is a longitudinal sectional view of the first embodiment of the assembly according to the present invention on which is attached and fixed a transfixed dental prosthesis core; and
    - Figure 9 is a detail view in longitudinal section of a second embodiment of the assembly according to the present invention.
    In Figures 1 to 7 is illustrated a first embodiment of assembly 1 according to the present invention.
    This set 1 comprises first of all a ceramic dental implant 2, as illustrated in FIG. 1, intended to be installed in the jaw bone
    7U53FDEP.docx or mandible of a patient. This extends along a first longitudinal axis l-l between a proximal end 2a and a distal end 2b, with internal connection housing 3 extending from the distal end 2b and in the direction of the proximal end 2a.
    The internal connection housing 3 comprises at least one section 4 of non-circular cross section.
    The assembly 1 secondly comprises an internally threaded insert 5, as illustrated in FIG. 2, shaped so as to be attached in the section 4 of non-circular cross section of the internal connection housing 3 of the dental implant 2 (see Figure 6) by being indexed in rotation about the first longitudinal axis ll. More specifically, the internally threaded insert 5 comprises a proximal section 5a of non-circular cross section.
    The shape of the cross section of the proximal section 5a fits into the shape of the non-circular cross section of the section 4 of the dental implant 2 so as to cooperate to index in rotation the internally threaded insert 5 around the first longitudinal axis ll in the internal connection housing 3 of the dental implant 2. The shapes of the section 4 with non-circular cross section and of the proximal section 5a are more particularly visible in FIG. 3 which is a section of the implant 2 and of the internally threaded insert 5 along the transverse plane P indicated in FIG. 6.
    The assembly 1 comprises in the third place a fixing part 6, more particularly visible in FIGS. 4 and 5, with a first axial through passage 7 having a cross section of dimensions sufficient for the passage of a threaded element 8 (see FIG. 7 ) intended to cooperate by screwing with the internally threaded insert 5. The fixing piece 6 is shaped to engage in a radial housing 9 formed in the side wall 3a of the internal connection housing 3 of the dental implant 2 so to form an axial stop opposing an extraction of the internally threaded insert 5 from the section 4 of non-circular cross section of the internal connection housing 3.
    The fixing piece 6 extends between a first end 6a, intended to engage in the internal connection housing 3 of the dental implant 2, and a second end 6b.
    The first end 6a of the fixing piece 6 comprises a first set 60a of longitudinal fins 61a to 63a with free distal parts 610a to 630a. The second end 6b of the fixing piece 6 comprises a second set 60b of longitudinal fins 61b to 63b with free distal parts 610b to 630b.
    7053FDEP.docx
    The first 60a and second 60b sets of longitudinal fins 61a to 63a and 61b to 63b are defined by a plurality of longitudinal slots F1 to F6 extending over only part of the length of the fastener 6 and originating in a manner alternating from the first end 6a and from the second end 6b, said slots F1 to F6 all extending along the same intermediate axial section 600 of the fastener 6 (Figure 5).
    The assembly 1 further comprises a dental prosthesis core 10 transfixed into ceramic as illustrated in FIG. 7. This dental prosthesis core 10 has an outer shape substantially in the form of a tooth preferably obtained by machining a block of ceramic or produced by sintering a ceramic powder.
    The dental prosthesis core 10 comprises a second through passage 11 constituted by first 12 and second 13 successive passage sections, said first passage section 12 extending from a proximal end 10a of the dental prosthesis soul 10 transfixed according to a second longitudinal axis ll-ll, and said second passage section 13 extending the first passage section 12 so that the first 12 and second 13 passage sections form a non-zero angle A between them.
    In FIG. 7, it can be seen that the assembly 1 further comprises a fixing screw 8 comprising a screw head 14 from which extends a screw rod 15 provided with a threaded section 16 intended to be received by screwing in said internally threaded insert 5.
    The first passage section 12 in the transfixed dental prosthesis core 10 has transverse dimensions allowing reception of the second end 6b of the fixing piece 6 and of the screw head 14 by axial penetration along the second longitudinal axis ll- ll (in a translational movement illustrated by arrow 17) from the proximal end 10a of the transfixed dental prosthesis core 10. The screw head 14 and the second end 6b of the fixing piece 6 are shaped so as to cooperate to retain the dental prosthesis core 10 transfixed on the dental implant 2 (configuration illustrated in FIG. 8).
    The second passage section 13 in the dental prosthesis core 10 has transverse dimensions smaller than those of the first passage section 12, but sufficient for the passage of a tool making it possible to rotate the fixing screw 8 according to the first longitudinal axis ll.
    Here, the screw head 14 has a hollow screw cavity 18 with a non-circular cross section (here hexagonal) of dimensions smaller than
    7053FDEP.docx ίο overall dimensions of the screw head 14. To drive the fixing screw 8, one can for example use a tool allowing an angulation with the screw head 14 during a screwing or unscrewing, as described for example in document EP 2 607 722.
    In FIG. 7, it can be seen that the screw head 14 has a frustoconical lower face 19. Any other shape of the lower face 19 providing a gradual widening of the cross section of the screw head 14 is conceivable. In this way, a relative movement in translation of the fixing screw 8 towards the proximal end 2a of the dental implant 2 along the first longitudinal axis l-l causes a radial expansion of the second end 6b of the fixing part 6.
    It is noted that the second end 6b of the fixing piece 6 comprises a seat 20 substantially frustoconical and substantially complementary to the lower face 19 frustoconical. This complementarity makes it possible to distribute the stresses by a surface contact between the screw head 14 and the second end 6b.
    More particularly here, the radial expansion of the second end 6b of the fixing piece 6 allows the second end 6b to penetrate or be better penetrated (the free distal parts 610b to 630b of the longitudinal fins 61b to 63b) by the fixing part 6 in an annular groove 21 formed in the first passage section 12 of the dental prosthesis core 10.
    Alternatively, if the first passage section 12 of the dental prosthesis core 10 does not have an annular groove 21, the radial expansion of the second end 6b of the fixing piece 6 makes it possible to bring and press the free distal parts 610b to 630b of the longitudinal fins 61b to 63b bearing against the side wall 12a of the first passage section 12.
    In the embodiment illustrated in FIGS. 1 to 8, when the first passage section 12 receives the second end 6b of the fixing piece 6 and the screw head 14 by axial penetration along the first longitudinal axis ll, the second end 6b of the fixing part 6 engages in the annular groove 21 reversibly by snap-fastening. This snap-fastening allows a precarious, but satisfactory, fixation of the dental prosthesis core 10 on the dental implant 2 before the practitioner tightens the fixing screw 8.
    To fix the dental prosthesis core 10 on the dental implant 2, after receiving the second end 6b of the fixing piece 6 in the annular groove 21, the screw head 14 axially bears against the second
    70531-'DEP.docx end 6b of the fixing part 6 and opposes a displacement towards the first longitudinal axis 1-1 of the free distal parts 610b to 630b of the longitudinal fins 61b to 63b (FIG. 8). The second end 6b thus remains snapped into the annular groove 21 so as to oppose an extraction of the second end 6b of the fixing piece 6 from the annular groove 21.
    It should be noted that the free distal parts 610b to 630b of the longitudinal fins 61b to 63b may, after snap-fastening, enter the annular groove 21 only partially. This makes it possible, for example, to make it easier to snap into place and to facilitate voluntary removal of the dental prosthesis core 10 away from the dental implant 2 (the necessary radial deformation towards the interior of the free distal parts 610b to 630b longitudinal fins 61b to 63b being less). In this case, to ensure good fixation of the dental prosthesis core 10 on the dental implant 2, after reception of the second end 6b of the fixing part 6 in the annular groove 21, a relative movement in translation of the fixing screw 8 towards the proximal end 2a of the dental implant 2 along the first longitudinal axis ll causes a radial expansion of the second end 6b of the fixing piece 6 (in this case a relative spacing of the free distal parts 610b at 630b of the longitudinal fins 61b to 63b). This radial expansion increases the penetration of the free distal parts 610b to 630b of the longitudinal fins 61b to 63b in the annular groove 21 and therefore the retention of the dental prosthesis core 10 on the dental implant 2.
    We see more particularly in Figure 7 that the annular groove 21 has a proximal section 21a frustoconical on which comes to bear the second end 6b of the fastener 6 by means of a substantially frustoconical surface 22. Thus, the expansion radial from the second end 6b of the fixing piece 6 induced along the first longitudinal axis ll pressing of the proximal end 10a of the dental prosthesis core 10 towards the distal end 2b of the dental implant 2.
    The first end 6a of the fixing piece 6 is in turn received in the radial housing 9 reversibly by snap-fastening. Here again, to ensure a reversible snap-on, use is made of a substantially frustoconical contact surface 23 and of a distal frustoconical section 9b of the radial housing 9, cooperating so that a traction of the fixing piece 6 according to the first longitudinal axis ll away from the proximal end 2a of the dental implant 2 induces a displacement (approximation) of the free distal parts 610a to 630a of the longitudinal fins 61a to 63a towards the first longitudinal axis ll.
    7053FDEP.docx
    To keep the first end 6a of the fixing piece 6 snapped into the radial housing 9, the first end 6a of the fixing piece 6 and the internally threaded insert 5 are shaped so that when the internally threaded insert 5 is bearing axially against the first end 6a of the fixing part 6, this support is opposed to a withdrawal of the first end 6a of the fixing part 6 from the radial housing 9. This is again obtained by a frustoconical surface 5c provided at the distal end 5b of the internally threaded insert 5 (see Figure 2).
    It should be noted that the free distal parts 610a to 630a of the longitudinal fins 61a to 63a may, after snap-fastening, enter the radial housing 9 (which is here an annular groove) only partially. This makes it possible, for example, to make it easier to snap into place and to facilitate voluntary removal of the fixing part 6 from the dental implant 2 (the necessary radial deformation towards the inside of the free distal parts 610a to 630a of the longitudinal fins 61a to 63a being less). In this case, to ensure good fixing of the fixing piece 6 in the dental implant 2, after reception of the first end 6a of the fixing piece 6 in the radial housing 9, a relative movement in translation of the insert internally threaded 5 towards the distal end 2b of the dental implant 2 along the first longitudinal axis ll causes a radial expansion of the first end 6a of the fixing piece 6 (in this case a relative spacing of the free distal parts 610a to 630a of the longitudinal fins 61a to 63a). This radial expansion increases the penetration of the free distal parts 610a to 630a of the longitudinal fins 61a to 63a in the radial housing 9, and therefore the retention of the fixing part 6 in the dental implant 2.
    The first end 6a of the fixing piece 6 also comprises a substantially frustoconical seat 24 against which abuts the frustoconical surface 5c, and which is substantially complementary to the frustoconical surface 5c. This complementarity makes it possible to distribute the stresses by a surface contact between the internally threaded insert 5 and the first end 6a.
    More particularly, it can be seen in FIGS. 7 and 8 that the dental prosthesis core 10 comprises a proximal end 10a shaped to come to bear directly against the distal end 2b of the dental implant 2. The dental implant 2 and 1 the prosthesis core 10 being made of ceramic, ceramic-to-ceramic contact is obtained reducing the risk of premature wear.
    7053FDEP.ducx
    In FIG. 7, it can be seen that the core of the dental prosthesis 10 comprises a proximal housing 25, in the form of a non-circular cross section, intended to receive by axial penetration a distal extension 26 of the dental implant 2 also comprising a form of non-circular cross-section, for example complementary to that of the proximal housing 25. The proximal housing 25 and the distal extension 26 are shaped so as to constitute rotation indexing means 27 of the dental prosthesis core 10a and of the dental implant 2 around the first longitudinal axis ll.
    The second overall embodiment 1 illustrated in FIG. 9 differs from the first embodiment illustrated in FIGS. 1 to 8 in that the first end 6a of the fixing piece 6 is received in the radial housing 9 so irreversible.
    To do this, the radial housing 9 comprises a distal shoulder 28 comprising a bearing face 29 perpendicular to the first longitudinal axis l-l. For its part, the free distal parts 610a to 630a of the longitudinal fins 61a to 63a have lower faces defining a bearing surface 30 substantially in the shape of a crown and oriented perpendicular to the first longitudinal axis l-l.
    When the fixing piece 6 is snapped into the dental implant 2, the intermediate axial section 600 protrudes out of the dental implant 2. Thus, in the case where it would be necessary to extract the internally threaded insert 5, the piece attachment 6 can be cut along a plane P1 intersecting the intermediate axial section 600. The fins 61a to 63a are then separated and can be removed from the dental implant 2.
    The protrusion of the intermediate axial section 600 out of the dental implant 2 is also present in the first embodiment, which guarantees a possibility of extraction of the fixing piece 6 in the case where the practitioner does not succeed in disengaging the first end 6a outside the radial housing 9.
    In FIGS. 1 to 8, the dental prosthesis core 10 has an outer shape substantially in the form of a tooth, preferably obtained by machining a ceramic block or produced by sintering a ceramic powder. Such a dental prosthesis core 10 can optionally be coated by the technician with one or more very light layers of texturing or coloring providing an appearance closest to a natural tooth.
    Alternatively, the dental prosthesis core 10 can be a ceramic block of substantially cylindrical or prismatic external shape and intended
    7053FDEP.docx to be machined to obtain an outer shape substantially in the form of a tooth (as for example illustrated in documents KR 10-2013-0097820, US 2012/0251979 and EP 2 837 357).
    An example of use of the first embodiment of assembly 1 for fixing a dental prosthesis core 10 will now be explained in relation to FIGS. 1 to 8.
    The patient has in the mouth the dental implant 2 of FIG. 1 which is osteointegrated after a healing period.
    The practitioner begins by introducing into the internal connection housing 3 the internally threaded insert 5 until the section 5a of non-circular cross section penetrates into the section 4 of non-circular cross section. The risk of loss or swallowing of the internally threaded insert 5 is then very reduced, due to its depression all the way to the bottom of the internal connection housing 3.
    The practitioner then inserts the fixing piece 6 of FIGS. 4 and 5 until the first end 6a of the latter is reversibly snapped into the radial housing 9 which is in the form of an annular groove. We are then in the configuration illustrated in FIG. 6. The fixing part 6 thus retains the internally threaded insert 5 captive in the internal connection housing 3. There is no risk of loss or swallowing of the internally threaded insert 5 and / or of the fixing part 6, which form a unitary assembly.
    The practitioner then introduces and begins to screw the fixing screw 8 into the internally threaded insert 5 until it comes into the position illustrated in FIG. 7. The screw head 14 is then away from the second end 6b of the fixing part 6 so as not to hinder a radial movement of the distal ends 610b to 630b of the longitudinal fins 61b to 63b towards the first longitudinal axis ll. There is no risk of loss or swallowing of the internally threaded insert 5 and / or of the fixing piece 6 and / or of the fixing screw 8, which form a unitary assembly.
    The practitioner can safely bring the prosthesis core 10 and then place it on the implant 2 according to the movement illustrated by the arrow 17. During this movement, the screw head 14 and the second end 6b engage in the first passage section 12, and the distal ends 610a to 630a of the longitudinal fins 61a to 63a snap into the annular groove 21. There is no risk of loss or swallowing of the internally threaded insert 5 and / or the fixing part 6 and / or the prosthesis core 10, which form a unitary assembly.
    7053FDEP.docx
    Since the snaps are reversible, the practitioner can at any time separate the assembled components if necessary.
    The practitioner then introduces a screwing tool through the second passage section 13 to rotate the fixing screw 8. During this screwing, the screw head 14 comes into contact with the first end 6a of the fixing part 6 and opposes any escape of the distal ends 610a to 630a of the longitudinal fins 61a to 63a out of the annular groove 21.
    While continuing the screwing, the internally threaded insert 5 is moved slightly towards the distal end 2b of the dental implant 2 until it comes to bear against the second end 6b. The internally threaded insert 5 opposes any escape of the distal ends 610b to 630b of the longitudinal fins 61b to 63b out of the radial housing 9.
    Continuing further screwing to tension the fixing screw 8, the practitioner produces a slight expansion of the first end 6a (and possibly the second end 6b) of the fixing piece 6, which induces an axial pressing of the the proximal end 10a of the dental prosthesis core against the distal end 2b of the dental implant 2. We are then in the configuration illustrated in FIG. 8.
    Finally, the practitioner can plug the orifice of the second passage section 13 using an appropriate material.
    The use of the second embodiment of assembly 1 illustrated in FIG. 9 is similar to that of the first embodiment. It only differs in that the labeling of the fixing part 6 is irreversible.
    The present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations thereof contained in the field of claims below.
    7053FDEP.docx
    权利要求:
    Claims (20)
    [1" id="c-fr-0001]
    1 - Set (1) of components for dental prosthetic restoration, comprising a ceramic dental implant (2) intended to be installed in the maxillary or mandibular bone of a patient, extending along a first axis
    5 longitudinal (ll) between a proximal end (2a) and a distal end (2b), with internal connection housing (3) extending from the distal end (2b) and towards the proximal end (2a) , characterized in that:
    the internal connection housing (3) comprises at least one section (4) of non-circular cross section,
    10 - the assembly (1) comprises an internally threaded insert (5), shaped so as to be attached in the section (4) of non-circular cross section of the internal connection housing (3) of the dental implant (2) by being indexed therein in rotation about the first longitudinal axis (ll),
    - The assembly (1) comprises a fastener (6) with a first axial passage 15 (7) having a cross section of dimensions sufficient for the passage of a threaded element (8) intended to cooperate by screwing with the internally threaded insert (5), shaped to engage in a radial housing (9) formed in the side wall (3a) of the internal connection housing (3) of the dental implant (2) so as to form an axial stop opposing an extraction of the internally threaded insert (5) from the non-circular cross-section (4) of the internal connection housing (3).
    [2" id="c-fr-0002]
    2 - assembly (1) according to claim 1, characterized in that it further comprises a dental prosthesis core (10) transfixed into ceramic comprising a second through passage (11) constituted by first (12) and
    Second (13) successive passage sections, said first passage section (12) extending from a proximal end (10a) of the dental prosthesis core (10) transfixed along a second longitudinal axis (ll-ll), and said second passage section (13) extending the first passage section (12) so that the first (12) and second (13) passage sections form a non-zero angle (A) between them.
    [3" id="c-fr-0003]
    3 - assembly (1) according to claim 2, characterized in that:
    - It comprises a fixing screw (8) comprising a screw head (14) from which extends a screw rod (15) provided with a threaded section (16) intended to be received by screwing in said internally threaded insert (5),
    35 - the fixing piece (6) extends between a first end (6a), intended to engage in the internal connection housing (3) of the dental implant (2), and a second end (6b) ,
    7053FDEP.docx
    - The first passage section (12) of the transfixed dental prosthesis core (10) has transverse dimensions allowing the reception of the second end (6b) of the fixing piece (6) and of the screw head (14 ) by axial penetration along the second longitudinal axis (ll-ll) from the proximal end (10a) of the transfixed dental prosthesis core (10),
    - The screw head (14) and the second end (6b) of the fixing piece (6) are shaped so as to cooperate to retain the dental prosthesis core (10) transfixed on the dental implant (2).
    [4" id="c-fr-0004]
    4 - assembly (1) according to claim 3, characterized in that the second passage section (13) of the dental prosthesis core (10) has transverse dimensions smaller than those of the first passage section (12), but sufficient for the passage of a tool allowing the fixing screw (8) to rotate along the first longitudinal axis (ll).
    [5" id="c-fr-0005]
    5 - assembly (1) according to one of claims 3 or 4, characterized in that a relative movement in translation of the fixing screw (8) towards the proximal end (2a) of the dental implant (2) along the first longitudinal axis (ll) causes a radial expansion of the second end (6b) of the fixing piece (6).
    [6" id="c-fr-0006]
    6 - assembly (1) according to one of claims 3 or 4, characterized in that the dental prosthesis core (10) comprises an annular groove (21) intended to receive the second end (6b) of the fixing part (6).
    [7" id="c-fr-0007]
    7 - assembly (1) according to claim 6, characterized in that a relative movement in translation of the fixing screw (8) towards the proximal end (2a) of the dental implant (2) along the first longitudinal axis (ll) causes a radial expansion of the second end (6b) of the fixing piece (6) to engage the second end (6b) of the fixing piece (6) in the annular groove (21).
    [8" id="c-fr-0008]
    8 - assembly (1) according to claim 6, characterized in that, when the first passage section (12) receives the second end (6b) of the fixing piece (6) and the screw head (14) by penetration axial along the first longitudinal axis (ll), the second end (6b) of the fixing piece (6) engages in the annular groove (21) in a reversible manner, preferably by snap-fastening.
    [9" id="c-fr-0009]
    9 - assembly (1) according to claim 8, characterized in that after receipt of the second end (6b) of the fixing piece (6) in the annular groove (21), the screw head (14) comes axially resting against the second end (6b) of the fixing piece (6) and opposes an extraction of the second end (6b) of the fixing piece (6) out of the annular groove (21).
    7053FDEP.docx
    [10" id="c-fr-0010]
    10 - assembly (1) according to claim 8, characterized in that after receipt of the second end (6b) of the fixing piece (6) in the annular groove (21), a relative movement in translation of the screw fixation (8) towards the proximal end (2a) of the dental implant (2) along the first longitudinal axis (ll) causes a radial expansion of the second end (6b) of the fixation piece (6).
    [11" id="c-fr-0011]
    11 - assembly (1) according to one of claims 7 or 10, characterized in that the annular groove (21) and / or the second end (6b) of the fixing piece (6) have respective shaped contact surfaces so that the radial expansion of the second end (6b) of the fixing piece (6) induces along the first longitudinal axis (ll) a pressing of the proximal end (10a) of the dental prosthesis core (10 ) towards the distal end (2b) of the dental implant (2).
    [12" id="c-fr-0012]
    12 - assembly (1) according to any one of claims 3 to 11, characterized in that:
    the first end (6a) of the fixing piece (6) comprises a first set (60a) of longitudinal fins (61a-63a) with free distal parts (610a630a),
    the second end (6b) of the fixing piece (6) comprises a second set (60b) of longitudinal fins (61b-63b) with free distal parts (610b630b),
    - the first (60a) and second (60b) sets of longitudinal fins (61a63a; 61b-63b) are defined by a plurality of longitudinal slots (F1-F6) extending over only part of the length of the workpiece fixing (6) and originating alternately from the first end (6a) and from the second end (6b), said slots (F1-F6) all extending along the same intermediate axial section (600) of the fixing part (6).
    [13" id="c-fr-0013]
    13 - assembly (1) according to any one of claims 3 to 12, characterized in that the first end (6a) of the fixing piece (6) is received in the radial housing (9) irreversibly, preferably by snap-fastening.
    [14" id="c-fr-0014]
    14 - assembly (1) according to any one of claims 3 to 12, characterized in that the first end (6a) of the fixing piece (6) is received in the radial housing (9) reversibly, preferably by snap-fastening.
    [15" id="c-fr-0015]
    15 - assembly (1) according to claim 14, characterized in that the first end (6a) of the fixing piece (6) and the internally threaded insert (5)
    7053FDEP.docx are shaped so that, when the internally threaded insert (5) bears axially against the first end (6a) of the fixing piece (6), this support prevents withdrawal of the first end (6a) of the fixing part (6) outside the radial housing (9).
    [16" id="c-fr-0016]
    16 - assembly (1) according to one of claims 14 or 15, characterized in that a relative displacement in translation of the internally threaded insert (5) towards the distal end (2b) of the dental implant (2 ) along the first longitudinal axis (ll) causes a radial expansion of the first end (6a) of the fixing piece (6).
    [17" id="c-fr-0017]
    17 - assembly (1) according to any one of claims 2 to 16, characterized in that the dental prosthesis core (10) comprises a proximal end (10a) shaped to come to bear directly against the distal end ( 2b) of the dental implant (2).
    [18" id="c-fr-0018]
    18 - assembly (1) according to any one of claims 2 to 17, characterized in that it comprises means for indexing in rotation (27) of the dental prosthesis core (10) and of the dental implant (2) around the first longitudinal axis (ll).
    [19" id="c-fr-0019]
    19 - assembly (1) according to any one of claims 2 to 18, characterized in that the dental prosthesis core (10) has an outer shape substantially in the form of a tooth preferably obtained by machining a ceramic block or produced by sintering a ceramic powder.
    [20" id="c-fr-0020]
    20 - assembly (1) according to any one of claims 2 to 19, characterized in that the dental prosthesis core (10) is a ceramic block of substantially cylindrical or prismatic external shape and intended to be machined to obtain a outer shape substantially tooth-shaped.
    1/7 ι
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    同族专利:
    公开号 | 公开日
    WO2018138630A1|2018-08-02|
    EP3573568A1|2019-12-04|
    BR112019015336A2|2020-03-10|
    FR3062052B1|2021-07-16|
    US11123160B2|2021-09-21|
    US20210128278A1|2021-05-06|
    EP3573568B1|2021-01-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20110123949A1|2005-02-05|2011-05-26|Friadent Gmbh|Dental implant|
    DE202008003960U1|2007-03-21|2008-05-21|Prager, Helmut, Dr.|dental implant|
    EP2127612A1|2008-05-27|2009-12-02|Mis-Implants Technologies Ltd|Abutment assembly device and dental prosthesis|
    WO2011036268A2|2009-09-24|2011-03-31|Dentalpoint Ag|Dental prosthesis system|
    US20150140508A1|2013-11-18|2015-05-21|Adaptall Manufacturing Inc.|Universal Retrofit Dental Abutment|WO2020157045A1|2019-01-29|2020-08-06|Valoc Ag|Abutment arrangement and dental restoration kit|
    WO2020174113A1|2019-02-26|2020-09-03|Gt-Medical, S.L.|Dental interface with mode for reversibly fitting a prosthetic structure to an implant and connection method|US5733122A|1995-05-31|1998-03-31|Gordon; Basil|Dental implant attachment assembly including device and method for resisting loosening of attachment|
    US5782918A|1996-12-12|1998-07-21|Folsom Metal Products|Implant abutment system|
    SE526908C2|2003-12-22|2005-11-15|Nobel Biocare Ab|Arrangement for location orientation of bridge or bridge for dental implants|
    US7300282B2|2004-07-16|2007-11-27|Sapian Schubert L|Biofunctional dental implant|
    IL177848D0|2006-09-03|2006-12-31|Oz Vachtenberg|Expandable dental implants of high surface area and methods of expanding the same|
    US20080241790A1|2007-03-30|2008-10-02|Gittleman Neal B|CIP of Expanding Ball Lock Oral Prosthesis Alignment Apparatus|
    US20080261174A1|2007-04-23|2008-10-23|Gittleman Neal B|Expanding Ball Lock Oral Prosthesis Alignment Apparatus|
    EP2493414A2|2009-10-28|2012-09-05|3M Innovative Properties Company|Dental implant mill blank articles and methods of making those|
    EP2607722B1|2011-12-22|2014-02-26|Straumann Holding AG|Connecting screw for a dental implant|
    KR20130097820A|2012-02-25|2013-09-04|이종호|Premilled implant custom abutment blank for the production of custom freeangled implant abutment|
    GB2509138A|2012-12-21|2014-06-25|Nobel Biocare Services Ag|Dental component with screw fixation|
    EP2837357A1|2013-08-14|2015-02-18|Medentika GmbH|Holding device for an abutment blank, abutment blank, system comprising the holding device and the abutment blank and method for retaining and machining the abutment blank|
    US9265591B1|2013-11-22|2016-02-23|Neal B. Gittleman|Dental prosthesis alignment apparatus|
    CA2985446A1|2015-07-24|2017-02-02|Nobel Biocare Services Ag|Adapter for attaching a dental superstructure to a dental implant and dental assembly comprising the adapter|
    FR3047407B1|2016-02-05|2021-06-11|Anthogyr Sa|DENTAL COMPONENT FOR UNIT PROTHETIC RESTORATION OF A TOOTH|
    FR3062052B1|2017-01-26|2021-07-16|Anthogyr Sa|SET OF COMPONENTS FOR DENTAL PROTHETIC RESTORATION|
    FR3062053B1|2017-01-26|2021-07-16|Anthogyr Sa|INTERMEDIATE FIXING PART|FR3062052B1|2017-01-26|2021-07-16|Anthogyr Sa|SET OF COMPONENTS FOR DENTAL PROTHETIC RESTORATION|
    FR3062053B1|2017-01-26|2021-07-16|Anthogyr Sa|INTERMEDIATE FIXING PART|
    法律状态:
    2017-12-13| PLFP| Fee payment|Year of fee payment: 2 |
    2018-07-27| PLSC| Publication of the preliminary search report|Effective date: 20180727 |
    2020-01-21| PLFP| Fee payment|Year of fee payment: 4 |
    2021-01-21| PLFP| Fee payment|Year of fee payment: 5 |
    2022-01-19| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1750654|2017-01-26|
    FR1750654A|FR3062052B1|2017-01-26|2017-01-26|SET OF COMPONENTS FOR DENTAL PROTHETIC RESTORATION|FR1750654A| FR3062052B1|2017-01-26|2017-01-26|SET OF COMPONENTS FOR DENTAL PROTHETIC RESTORATION|
    EP18702819.6A| EP3573568B1|2017-01-26|2018-01-23|Set of components for dental prosthetic restoration|
    BR112019015336-5A| BR112019015336A2|2017-01-26|2018-01-23|SET OF COMPONENTS FOR DENTAL PROSTHETIC RESTORATION|
    PCT/IB2018/050398| WO2018138630A1|2017-01-26|2018-01-23|Set of components for dental prosthetic restoration|
    US16/474,608| US11123160B2|2017-01-26|2018-01-23|Set of components for dental prosthetic restoration|
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