• 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:
    The invention relates to a device for the penetrating extension of a blind bore introduced into hard tissue, in particular into a jaw bone (24), comprising a working tool (6), e.g. an angle piece with a contra-angle head (21), with a shaft (5) arranged thereon and a distal working head (20) arranged at the end of the shaft (5) for processing the jawbone (24), as well as an insertable into the blind bore The hollow body (1) is designed so that it is tightly insertable into the bone bore, or that on the hollow body (1) means are provided for tight insertion into the bone bore, the pressure chamber (7) forming, hollow body or tubular body (1), wherein the hollow body (1) has a, preferably cylindrical, inner cavity (12), with a distal working opening (2) close to the bone (24) during operation and an inlet opening (3) for the shaft opposite the working opening (2). 5), wherein in the cavity (12) a sealed pressure chamber (7) can be formed, wherein a connection (8) for applying an internal pressure in the pressure chamber (7) is provided, wherein the shaft (5) through the Eingangsöffnu ng (3) into the cavity (12) is insertable and the distal working head (20) of the shaft (5) through the working opening (2) for processing the jawbone (24) is at least partially herausführbar. The invention is characterized in that the working tool (6) and the hollow body (1) are connected together to form a common unit and that in or on the device constructively designed adjusting means (22) or an adjusting mechanism (22) for axial outward and Herbeweg and for linear feed of the shaft (5) in the cavity (12) along the longitudinal axis of the shaft (5) and the cavity (12) is provided / is.
    公开号:AT513103A1
    申请号:T728/2012
    申请日:2012-06-28
    公开日:2014-01-15
    发明作者:
    申请人:Jeder Gmbh；
    IPC主号:
    专利说明:

    · · · 4 4 4 4 4 4 4 ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ··· ·· 16672/5/5
    The invention relates to a device for the penetrating extension of a blind hole introduced into a hard tissue, in particular into a jawbone, according to the preamble of claim 1.
    Such an extension of a bone bore is required, for example, in the field of dental surgery when performing a procedure called sinus lift.
    A sinus lift is an operation in which the maxillary sinus or Schneider's membrane is partially detached from the jawbone and raised to create a space between the bone and the maxillary sinus mucosa. The resulting cavity is e.g. a synthetic bone substitute material introduced. This material will transform into bone within 6 months to provide a solid foundation for an implant.
    The method of " open " or " classic " Sinuslifts, however, causes a folding of the remaining bone plate and is relatively highly invasive. A recent method is the so-called " crestale " Sinus lift, which does not open, but a " piercing " the bone plate requires.
    Even if very advanced methods have been developed to loosen the maxillary sinus mucosa through the small bore, which is usually only about 4 mm in diameter, as gently and adequately as possible from the jawbone, the moment when the jaw bone is punctured remains a critical moment, which requires great experience and special skill from the doctor, although, despite all precautions, there is a residual risk of damaging the sensitive maxillary sinus mucosa when piercing the bone plate.
    In any case, in order to make the sinus lift procedure safer, aids that facilitate this pervasive lengthening of the jawbone bore are desirable, thereby reducing the risk of damaging the delicate sinus behind the jawbone.
    Such an advantageous device is known for example from WO 2010/048648 A1, in which a device is described, which has a tubular body with a distal working opening and an input opposite the working opening, which is connected to one of a shaft of a working tool, e.g. a milling cutter, enforced sealing element is closed. On the pipe body, a connection for applying an internal pressure is arranged. The tubular body is sealingly inserted into a previously introduced into the jawbone blind bore, wherein the distal working opening is present at the end of the blind bore, whereby the interior is largely sealed. The working medium in the interior of the tubular body, preferably NaCl solution, can now be pressurized via the connection, for example by means of a syringe connected to the connection. With the working tool, which can be controlled separately from the outside, the remaining between blind hole and maxillary sinus bone slice is now milled in the working opening. The moment the head of the working tool penetrates the bone and penetrates into the area below the sinus skin, the overpressure in the interior of the tubular body causes the working medium to penetrate through the free opening and push the sinusoid behind it away from the bone and thus out of the working area of the working tool and the danger area. The outflow of the pressure medium causes a pressure drop, which indicates the penetration of the bone and also prevents excessive swelling of the sinusoid. Such a device is reliable and can be achieved with such a device surgically excellent results with minimal risk for the sinusoidal.
    Another, working on the same principle advantageous device is known from the patent AT 501.402.
    A certain disadvantage of these devices is that they require two hands for their use. This is due to the fact that these devices consist of two independently operable and non-interconnected components, namely the tubular body and the working tool.
    With one hand holds the dentist while the tube body and this must simultaneously exert a certain pressure in order to use the tubular body sealing in the blind bore and to position on the mucosa, because only by a sufficient pressure in the interior of the tubular body can be built.
    With the other hand, the dentist must hold the work tool, usually a drill, and guide it precisely to remove the remaining bone plate. In doing so, he must on the one hand bring the shank or the drill head into the correct position and on the other hand must exert the correct pressure, which is required for processing and ablation of the bone plate. As mentioned, just this removal is very delicate and requires a steady hand; Excessive pressure or jerking of the drill head after breakthrough of the bone plate can easily lead to rupture of the sinus membrane.
    Just the fact that the dentist needs both hands, and thus still has to perform different movements, complicates the operation of these known devices and increases the risk. 3 " 4 • «4 · 4« i ** ι * < * * * · * »* *« 9 * · · • ·
    It is therefore an object of the present invention to develop the above-mentioned devices while maintaining their advantageous functionality to the effect that, while maintaining the reliability, the use of the device is facilitated.
    This object is solved by the characterizing features of claim 1.
    By providing that the work tool and the hollow body are connected together to form a common structural unit, it becomes possible for the dentist to hold and operate the entire apparatus with a single hand. However, this alone would not be enough, because by a mere constructive connection of these two components, the functionality of the device, namely the safe removal of the remaining bone plate, would not be guaranteed.
    At the same time, in the device according to the invention, an adjusting mechanism designed or arranged in or on the device must be provided for axial guidance and reciprocation and for linear advancement of the shaft in the cavity along the longitudinal axis of the shaft or cavity. Only then is it possible for the dentist to use with only one hand, the hollow body in the blind bore and at the same time exert the appropriate pressure to achieve a pressure build-up in the interior of the hollow body. At the same time, this also makes it possible to regulate the advance of the shaft or drill head and to remove the remaining bone plate in a targeted manner. If the drill breaks through the bone plate, the internal pressure immediately pushes the sinus membrane away from the danger area, at the same time there is a drop in pressure and the dentist stops the feed,
    The other hand of the dentist remains free during this time for further activities. For example, with the other free hand, the dentist can manually vary the pressure in the interior with a syringe, set the rotational or rotational speed of the drill or the feed. With the remaining hand, however, other instruments, such as a Langenbeck, can be held and positioned. In the features of the dependent claims further advantageous embodiments of the device according to the invention are described.
    Thus, according to an advantageous embodiment, provision is made for the working tool and the hollow body to be spaced-invariant with a constant predetermined * ♦ Λ Φ 4
    Distance, preferably positionally fixed to each other, are interconnected and only the shaft is movable relative to the working tool linearly along the longitudinal axis of the shaft and the cavity. The adjustment mechanism for the linear mobility of the shaft is, preferably exclusively, in the working tool, preferably arranged in the interior of the angle head. This is a sturdily constructed instrument with all essential moving parts inside protected. The size of this device is relatively small and therefore advantageous in hard to reach areas of the oral cavity replaceable.
    Advantageously, two separate drives are provided, a first drive, which causes only the rotation of the shaft 5, and a second drive, which causes only the linear movement of the shaft 5 in the arrow direction. Optionally, both drives are arranged in the interior of the angle head.
    In this context, it is advantageous if the working tool and the hollow body are connected to one another via a reversibly detachable connection, in particular a screw connection or a bayonet closure. In this way, access to the internal components, in particular to the adjusting mechanism and the guide element is easily possible.
    An alternative embodiment provides that the switching in the linear direction along the longitudinal axis of the cavity relative to the working tool is distance-invariant or not movable. In contrast, the working tool and the hollow body are connected to each other with variable spacing, wherein the two components are reciprocally movable relative to each other only linear along the direction of the longitudinal axis of the shaft and the cavity or wherein the distance between the working tool and the hollow body exclusively linearly along the longitudinal axis the cavity is adjustable. The change in the distance between the working tool and the hollow body takes place here via mechanical adjusting means outside the angle piece head. Under certain circumstances, such an embodiment is somewhat larger in construction, but does not require any internal, possibly miniaturized, drive technology.
    To ensure an exact parallel displacement, it is advantageous if it is provided that the working tool and the hollow body are connected to one another via a straight, preferably parallel to the longitudinal axis of the shaft and the cavity aligned threaded rod with spacing, wherein the threaded rod preferably via an external drive rotatable and thereby the distance is adjustable. At the same time the feed of the shaft can be controllably controlled via the threaded rod.
    A further advantageous alternative possibility for ensuring the parallel displaceability of the components to each other is characterized in that from the hollow body or outgoing from the hollow body extensions at least one, possibly two, guide pin (s) protrudes (s), the / parallel to the longitudinal axis of the shaft and the cavity is aligned and which has passed through a corresponding recess (s) of the working tool and is guided therein.
    It is advantageously provided that between the working tool and the hollow body in its volume and / or its thickness or height variable spacer body is arranged.
    Advantageously, it is provided that the spacer body is a hollow body, which changes its volume by supplying or discharging a fluid, in particular a balloon body which can be enlarged by water.
    In this connection, it is particularly advantageous if the spacer body is an annular tire surrounding the shaft and lying against both the working tool and the hollow body in the region of the inlet opening. Such an embodiment is designed structurally and mechanically very simple. Above all, no real drive for Relatiwerschiebung the components is necessary, but this displacement causing filling or emptying of the spacer body can be done manually via a syringe.
    In practice, drills or milling tools have proved successful with rotating shafts and it is therefore advantageous if the working tool is an angle piece with a shank which projects from its angle head and rotates about its longitudinal axis, preferably with a working head designed as a milling or drilling head. By means of the device according to the invention it is therefore possible to use such drills, although the danger of injury to the sinus membrane is comparatively greatest in the case of drills and cutters.
    The device advantageously comes only with a single handle, over which the working tool and the hollow body with only one hand is at the same time tangible, durable and operable.
    It has proven to be quite sufficient in practice if it is provided that the path length, by which the shaft is movable, is a maximum of 1 cm, preferably about 0.6 cm. However, such small paths are already sufficient to damage the sinus membrane.
    To additionally increase the tightness of the system and to increase the internal overpressure, it is possible that the inlet opening is closed with a sealing element which enables at least a linear adjustability of the shaft.
    A further advantageous embodiment provides that a guide element is provided, which is insertable into the inlet opening, wherein the input opening is pressure-tight and substantially fluid-tightly closed by the guide element, wherein the guide element has a continuous recess through which the shaft feasible and in the hollow body is inserted and wherein the guide element optionally has a connection for a working medium for applying an internal pressure in the pressure chamber or in the hollow body.
    The guide element is optionally reversible and non-destructive fastened to the hollow body and removable from this. In this way, it is possible that you can easily replace components that are easily contaminated during operation. Such a guide element is described for example in AT 510,402.
    It is advantageous to provide that the shaft, optionally in the recess, pressure-tight and stored substantially fluid-tight and is guided and inside the pressure chamber, preferably a pressure of at least 1.5 bar, preferably at least 2.5 bar, can be reached and at least simultaneously a feed, drive and / or control movement of the shaft, for example, a rotation, a circular or wobbling motion and / or an axial feed of the shaft, is ensured.
    It is preferably provided that the shaft can only or exclusively perform an axial or linear movement according to the arrow.
    A very simple and automated solution provides that the rotation of the shaft is coupled to the linear feed of the shaft via a common drive. Thus, the number of panels on the working tool for the dentist can be reduced.
    Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.
    The invention is illustrated schematically with reference to various embodiments in the drawings and will be described below with reference to the drawings, for example.
    Fig. 1 shows a first embodiment of the invention in cross section.
    Fig. 1a shows a modification of the first embodiment in cross section.
    Fig. 2 shows a second embodiment of the invention in cross section.
    3 shows a perspective view of a part of the device according to FIG. 2.
    Fig. 4 shows a third embodiment of the invention in cross section.
    The basic structure and the functionality of the devices described in FIGS. 1 to 4 and in particular their correct application to the patient are already described in detail in WO 2010/048648 A1. In addition, AT 510 402 B describes the construction of the guide element 100, as well as analogous devices which have such a guide element 100.
    The interchangeable guide member 100 is, in addition to the sealing function, also essential to increase the contamination safety and the reduction of the risk of infection and is for the pure functionality of the device, so for safe working to avoid ruptures of the sinus membrane, not mandatory. The device can also be used without this guide element 100, as described, for example, in WO 2010/048648 A1, as long as the tightness in the pressure chamber 7 or the cavity 12 is ensured or the shaft 5 is sufficiently sealed by other means. Nevertheless, in the following illustrations of the various embodiments of FIGS. 1 to 4, a guide element 100 is always provided. The corresponding features and reference numerals are consistent throughout the figures.
    The guide element 100 consists of a sterilizable polymer, is manufactured in one piece or, one-piece and wild by means of injection molding. In a disk-shaped head region 110 of the guide element 100, a cylindrical recess 101 is formed centrally in the middle, which completely penetrates the guide element 100. During operation, the shaft 5 of a working tool 6, e.g. a milling cutter performed.
    To the head portion 110, a connection 108 in the form of a nozzle for attaching a hose 111 connects. The terminal 108 extends radially outwardly from the center of the recess 101 and the central longitudinal axis of the terminal 108 lies in the plane parallel to the surface of the disk-shaped head portion 110.
    The bottom surface 106 of the guide element 100 facing the bone 24 during operation is smooth and flat, which ensures good sliding and rotational pivoting. In the head portion 110, a cylindrical projection 104 is formed, which is surrounded by a partially recessed in a groove sealing element 4 in the form of an O-ring. Thus, the guide member 100 is inserted snug fit into the device.
    On the projection 104 a frustoconical sleeve 105 is formed, which tapers towards the top. The largest diameter at the base of the sleeve 105 is smaller than the diameter of the cylindrical projection 104 by about 30 to 40%.
    Both the cylindrical projection 104 and the sleeve 105 are, as well as the head portion 110, arranged concentrically around the central longitudinal axis of the recess 101 and are centrally penetrated by the recess 101.
    Starting from the connection 108 extends a completely inside the guide element 101 lying on all sides closed channel 102, which connects the terminal 108 with an outlet opening 103. This outlet opening 103 opens on the lower surface of the cylindrical projection 104 adjacent to the sleeve 105 and ensures the introduction of the fluid working or pressure medium, usually physiological saline solution, into the inlet opening 3 of the device. The channel 102 is separated from the recess 101 throughout. In this case, the channel 102 has a straight first section, initially close to the connection 108, with an initially larger diameter, which is oriented substantially perpendicularly and radially to the central longitudinal axis of the recess 101. The channel 102 then reduces its diameter and bends at right angles. This subsequent second section extends substantially parallel to the central longitudinal axis of the recess 101. In this way, the channel 102 structurally simple, for example, be formed by two subsequent holes in the one-piece guide element 100.
    1, 1a, 2 and 4 respectively show cross-sections through various embodiments of the device during operation during a sinus lift and that at the critical time of breaking the working head 20 through the bone plate 24 'of the jaw bone 24 of the upper jaw.
    The working tool 6 is usually a conventional angle or drill with a front elbow 21, with a shaft inserted therein 5 and arranged at the end of the shaft 5, provided for processing the jaw bone 24, distal working particular drill head 20th
    The tubular hollow body 1 has a substantially cylindrical inner cavity 12, a distaie working opening 2 and a working opening 2 opposite this input opening 3. Through this inlet opening 3, both the pressure medium and the shaft 5 of the working tool 6 is inserted into the cavity 12 of the hollow body 1 , The hollow body 1 is essentially constructed as the tubular body described in WO 2010/048648 A1.
    In order to form a pressure chamber 7 inside the hollow body 1, it is necessary to seal both the tubular cavity 12 of the hollow body 1 and the shaft 5 of the milling cutter 6 in the region of the inlet opening 3. By thus resulting pressure chamber 7 and the pressure generated therein is the piercing of the
    Bone plate 24 'ensures timely pushing away the sinus membrane 26 from the danger area.
    The forming pressure chamber 7 can either lie completely inside the hollow body 1 when the working opening 2 sealingly closes with the bottom of the blind bore. But the pressure chamber 7 may also extend into a region outside the actual hollow body 1, which is bounded by the wall of the blind bore and the conical sealing unit or the flange 10,11. In use, both acts sealing and both seals complement each other to keep the system as pressure and fluid-tight as possible.
    The inlet opening 3 at the other end of the pressure chamber 7 is closed by the fitting seated and positively inserted guide member 100 pressure and flügdicht. The shaft 5 is inserted and passes through the recess 101. At the connection 108, the hose 111 is connected and thus the supply of pressure medium into the interior of the hollow body 1 is possible. The tubing 111 can lead to a syringe or a manual or automatic pressure control unit with which the pressure can be introduced and controlled.
    As with the conventional crestal sinus lift when using the device according to the invention in a voräüsgehend surgery first a blind hole in the jaw bone 24 introduced from the alveolar ridge, with an about 1 mm thick bone plate 24 'between the end of the blind bore and the antrum remains 25. This is necessary in order not to damage the maxillary sinus mucosa 26 resting on the jawbone 24 in the antrum 25.
    In the prepared blind hole then the hollow body 1 is sealingly inserted until the working opening 2 is present on the bone plate 24 '. The hollow body 1 is stationary during the treatment, is fixed in position and can even be screwed into the blind hole.
    To improve the sealing effect, the flange 10 is displaced on the tubular body 1 to the jaw bone 24, so that the arranged on the flange 10 conical seal approach 11 is pressed firmly against the oral mucosa 27 at the outer edge of the blind bore and the blind bore thereby additionally seals. Optionally, in addition, a rubber dam can be used. As a result, a hydrostatic pressure of, for example, approximately 0.5 to 3 bar can subsequently form inside the pressure chamber 7.
    The working medium in the pressure chamber 7 serves at the same time the removal of heat generated during milling and acts for the rotating shaft 5 as a lubricant. Small amounts of working medium, which emerge along the rotating shaft 5 * · t »fr« · «+ + *» «· m * > It is not a problem for the functionality of the device since the pressure of the working medium in the pressure chamber 7 can be maintained via the terminal 108. Good sealing properties are nevertheless very advantageous, since the pressure drop at the moment of penetration of the bone slice in a dense pressure chamber 7 is better recognizable.
    The shank 5 of the working tool 6 is inserted through the recess 101 and the inlet opening 3 into the interior of the hollow body 1. The outermost tip or the working or boring head 20 of the milling cutter 6 or of the shaft 5 is also relatively strongly curved or substantially point-shaped in order to ensure the most punctiform and small-area passage through the bone plate 24 '.
    The shaft 5 passes through the recess 101, the inlet opening 3 and the inner cavity 12 of the hollow body 1 completely and exits during operation through the outlet opening 2, so that the remaining bone plate 24 'can be edited. The distal part of the shaft 5 with a smaller diameter can be easily passed through the recess 101, the rear portion with a larger diameter then fits snugly into the recess 101 a. The shaft 5 is thus in this area sealingly against the inner surface of the recess 101 and is additionally also irfi area of the cylindrical projection 104 and the sleeve 105 sealed, guided and supported. In the interior of the recess 101, an additional seal, for example an O-ring could be provided, but in the present embodiment, this is not the case.
    The shaft 5 is in the cavity 12 according to the arrow along its longitudinal axis axially up and down or linearly back and forth displaced, which is required especially for rotary cutters 6 to the necessary feed for the Durchfräsung of the remaining bone plate 24 'in To reach jawbone 24.
    If a working tool 6 with a shaft 5 rotating about its own axis is used, the rotatability of the shaft 5 must nevertheless remain possible despite the guidance and the linear movability of the shaft 5. Nevertheless, the shaft 5 is mounted in the recess 101, especially in the region of the sleeve 105, fluid-tight and pressure-tight and it can be constructed in the pressure chamber 7, a sufficient pressure when the hollow body 1 is inserted tightly in the blind bore. Via the connection 108, the working medium, for example a physiological saline solution, can now be introduced through the channel 102 and the outlet opening 103 into the inlet opening 3. Since the outer wall of the sleeve 105 is spaced from the inner wall of the funnel-shaped inlet opening 3, the flows
    Rinsing medium outside the sleeve 105 along and along the shaft 5 in the inner cavity 12 and the pressure chamber. 7
    The cutter 6 or the shaft 5 is moved downwards during operation, so that the working head 20 at the bottom exits through the working opening 2 and the bottom plate 24 'touches, the feed of the shaft 5 or milling cutter 6 very slowly, for example 1 mm / min, is.
    Once the bottom plate 24 'is minimally punctured at one location, aided by the punctiform configuration of the milling head 20, the pressurized working fluid immediately penetrates through this minimal opening and the sinus membrane 26 immediately clears the danger zone from the drill head Pressed away 20 and released from the jaw bone 24 even before the drill head 20 can completely pass through the opening. This corresponds exactly to the situation shown in the figures.
    The milling cutter 6 is then switched off and, as known from WO 2010/048648 A1, optionally a further detachment of the sinus membrane 26 in order to increase the space for the bone substitute material, for example by additional supply of pressure medium and optionally introducing vibrations. The shaft 5 can initially remain as a sealing element in the recess 101. Alternatively, the shaft 5 can also be removed and the recess 101 sealed by inserting a plug. As a result, further pressure can be exerted or the pressure can be maintained constant. Optionally, vibrations, for example utton vibrations, can also be introduced into the medium in order to facilitate a further detachment of the sinus membrane 26.
    In the embodiment according to FIG. 1 and FIG. 1 a, the angle head 21 of the drill 6 is connected to the hollow body 1 rigidly, rigidly, fixed in position and above all distance-invariably connected with a constant predetermined distance. This connection is made by a reversibly detachable, but rigid bayonet closure 30. The jaw bone 24 averted end portion of the hollow body 1 is in a cylindrical shell 30 ', which projects from the elbow 21, inserted and with the bayonet closure 30 by rotation about the longitudinal axis about 10 ° to 30 ° locked and fixed in position.
    However, the shaft 5 must always be mounted linearly adjustable, otherwise it would not be possible due to the advance of the working head 20 ablation of the remaining bone plate 24 '. For this purpose, means 22 for linear adjustability of the shaft 5 and an adjusting mechanism 22 for moving the shaft 5 are provided, wherein this adjusting mechanism 22 is arranged substantially at least partially in the interior of the angle head 21. - »* ψ» ψ «····· *» · »·· * ♦ * · · φ · *» ·
    This adjustment mechanism 22 may be configured differently. The adjusting mechanism 22 generally comprises a separate drive 23 for the shaft 5, which serves exclusively for the linear reciprocating movement of the shaft 5 along the central longitudinal axis of the shaft 5 or the cavity 12. At the same time the shaft 5 is also driven in rotation and is rotated at high speed around its longitudinal axis during operation of a drill or milling cutter. For this purpose, a further separate drive 23 'is often provided.
    A first option according to Frg. 1 is to provide two separate drives, namely a first drive 23 'exclusively for the rotation of the shaft 5, and a second drive 23, which moves the shaft 5 relative to the angle head 21 exclusively linearly. The two drives 23, 23 'are located outside of the elbow 21 in the handle and are separately controllable, for example via arranged on the working tool 6 controls or foot pedals. In the angle head 21 corresponding mechanical couplings and gears and sprockets are provided in order to implement the movements of the drives 23,23 'in the rotating and linear movements of the shaft 5.
    A second possibility according to FIG. 1a also consists of providing two separate drives, namely a first drive 23 'exclusively for the rotation of the shaft 5, and a second drive 23, the shaft 5 together with the first drive 23' exclusively linear in the direction of the arrow along the longitudinal axis shifts. The two drives 23, 23 'are arranged in the interior of the angle head 21 and can be controlled separately from each other.
    Alternatively, it is also possible to couple the two drives 23, 23 'to one another with an increase in the rotational speed of the shaft 5 simultaneously causing a slow advance in the direction of the jaw bone 24 and a reduction in the drilling speed possibly causing a stop or a backward movement of the working head 20 ,
    An alternative embodiment of the device according to the invention is described in FIGS. 2 and 3. In the working tool 6 is here in principle a conventional drill or a commercially available angle with a contra-angle head 21, in which a shaft 5 is inserted fixed and is rotatable about its axis quickly. The shaft 5 is therefore not adjustable in the linear direction along the central longitudinal axis of the cavity 12 in this case. However, in the present embodiment, the working tool 6 and the angle head 21 and the hollow body 1 are connected to each other with variable spacing. The two components 1, 21 are exclusively linearly along the direction of the longitudinal axis of the shaft 5 back and forth.
    This is effected in the embodiment of FIG. 2, characterized in that a straight threaded rod 31 is provided with an external thread. This threaded rod 31 is guided on one side in a threaded channel 41 with internal thread in a arranged on the hollow body 1 part-cylindrical element 40. As can be seen in FIG. 3, this element 40 is arranged obliquely laterally on the hollow body 1.
    On its opposite side, the threaded rod 31 is also guided or mounted in a protruding from the angle head 21 element 42. This element 42 is also teiizylind risch and is just like the element 40 obliquely vome on the left of the elbow 21 formed. In the element 42 there is a deflection mechanism 33 for a drive, not shown, which rotates the threaded rod 31 via a, optionally flexible, drive shaft 32 slowly with about 2 to 3 revolutions per second. This drive may be, for example, a foot-controlled electric motor. This ensures that in operation, the entire working tool 6 and thus also the shaft 5 linearly moves forward in the direction of the bone 24 and thereby the working head 20 can edit the remaining bone plate 24 '. The linear adjustability is about 0.6 cm.
    On the opposite side of the handle 38, a straight guide pin 35 is arranged, which, starting from an extension 34 of the hollow body 1, is aligned parallel to the threaded rod 31. The guide pin 35 has no thread and is smooth and passes through a arranged on the working tool 6 recess 36 therethrough. The recess 36 is formed in a laterally on the single handle 38 arranged part-cylindrical extension 39 of the working tool 6. The guide pin 35 is located, as shown in Fig. 3, on the opposite side to the threaded rod 31 side of the handle 38. The guide pin 35 can be accurately move in the corresponding recess 36, a side play or a tumbling movement is not possible. The guide pin 35 ensures a corresponding parallel displacement of the components 1 and 21 to each other.
    Another alternative embodiment of the invention is shown in FIG. The basic operating principle is analogous to the embodiment of FIGS. 2 and 3, but no threaded rod 31 is provided. Instead of the threaded rod 31, a second straight guide pin 35 'is provided without thread. This further guide pin 35 'is analogous to a part-cylindrical element 40 of the hollow body 1 and is fixed and parallel to the first guide pin 35 in the direction of the working tool 6. On the working tool 6, namely at the angle head 21, is a teilzylindrisches element 42 with a corresponding recess 36 'provided, 1 1 ··: υτ * • · ·· * wherein the recess 36' with the further guide pin 35 'is arranged in alignment and aligned and the guide pin 35' is guided in a linearly displaceable precisely fitting. In this way, there is an exact parallel displacement of the shank 5 supporting angle piece head 21 and the hollow body. 1
    The change in the distance between these two components 1 and 21, usually about 0.6 mm, is effected in this embodiment not by a drive, but by a spacer body 37. This is a variable volume hollow body in the form of a ring or tire, which is arranged around the shaft 5 around. The tire-shaped spacer body 37 lies between the hollow body 1 or the guide element 100 and the elbow 21 and touches both. Via a separate hose 43, a fluid can be supplied to or discharged from the spacer body 37, as a result of which the volume of the spacer body 37 changes. By fluid supply, the spacer body 37 expands and increases its thickness or height, whereby he pushes the elbow 21 and thus the shaft 5 away from the bone 24. If fluid drained from the spacer body 37, its height decreases and the elbow 21 and thus the shaft 5 move linearly in the direction of the bone 24. The dentist can thereby accurately control the feed of the shaft 5 in operation.
    In addition, an elastic bellows 118 can be arranged between the guide element 100 and the working tool 6, as is the case in FIGS. 2 and 4.
    It is also possible to combine the embodiments according to FIGS. 1, 1 a with the embodiments according to FIGS. 2, 3 and 4, by, for example, adjusting mechanism 22 or drives 23, 23 'additionally also being fitted in working tools 6 of the embodiments according to FIG 2, 3 and 4 are integrated.
    In this context, it would also be possible to fix the threaded rod 31 and / or the guide pins 35, 35 ', for example by screw nuts, reversibly and temporarily in a specific position.
    权利要求:
    Claims (16)
    [1]
    A device for the penetrating extension of a blind bore introduced into hard tissue, in particular into a jawbone (24), comprising a working tool (6), e.g. an angle piece with a contra-angle head (21), with a shaft (5) arranged thereon and a distal working head (20) arranged at the end of the shaft (5) for processing the jawbone (24), as well as a replaceable one in the blind bore The hollow body (1) is designed so that it is tightly replaceable in the bone bore, or that on the hollow body (1) means are provided for tight insertion into the bone bore, the pressure chamber (7) forming, hollow body or tubular body (1), wherein the hollow body (1) has a, preferably cylindrical, inner cavity (12), with a distal working opening (2) close to the bone (24) during operation and an inlet opening (3) for the shaft opposite the working opening (2). 5), wherein in the cavity (12) a sealed pressure chamber (7) can be formed, wherein a connection (8) for applying an internal pressure in the pressure chamber (7) is provided, wherein the shaft (5) through the Eingangsöff (3) into the cavity (12) is insertable and the distal working head (20) of the Schaffs (5) through the Arbeitsöffnürig (2) for processing the jawbone (24) is at least partially herausführbar, characterized in that the working tool (6 ) and the hollow body (1) are connected together to form a common unit and that in or on the device structurally designed adjusting means (22) or an adjusting mechanism (22) for the axial reciprocating movement or for linear advancement of the shaft (5) in the cavity (12) along the longitudinal axis of the shaft (5) and the cavity (12) are provided / is.
    [2]
    2. Device according to claim 1, characterized in that the working tool (6) and the hollow body (1) are spaced apart with a constant predetermined distance, preferably positionally fixed to each other, and only the shaft (5) relative to the working tool (6) along linear the longitudinal axis of the shaft (5) and the cavity (12) is movable, and the adjustment mechanism (22) for the linear mobility of the shaft (5), preferably exclusively, in the working tool (6), preferably in the interior of the angle head (21), is arranged.
    [3]
    3. A device according to claim 2, characterized in that the working tool (6) and the hollow body (1) via a reversibly releasable connection, in particular a screw or a bayonet lock (30) are interconnected.
    [4]
    4. The device according to claim 1, characterized in that the shaft (5) in the linear direction along the longitudinal axis of the cavity (12) relative to the working tool (6) or elbow head (21) is distance invariant or not movable, and that the working tool (6) and the hollow body (1) are spaced apart, wherein the two components relative to each other only linearly along the direction of the longitudinal axis of the shaft (5) and the cavity (12) are movable back and forth or wherein the distance between the Working tool (6) and the hollow body (1) only linear along the longitudinal axis of the cavity (12) is adjustable.
    [5]
    5. Apparatus according to claim 4, characterized in that the working tool (6) and the hollow body (1) via a straight, preferably parallel to the longitudinal axis of the shaft (5) and the cavity (12) aligned, threaded rod (31) connected to one another in a variable spacing are, wherein the threaded rod (31) preferably via an external drive (32) rotatable and thereby the distance is adjustable.
    [6]
    6. Apparatus according to claim 4 or 5, characterized in that from the hollow body (1) or from the hollow body (1) outgoing projections (34) at least one, possibly two, guide pin (s) (35) protrudes (s), / which is aligned parallel to the longitudinal axis of the shaft (5) and the cavity (12) and which has a corresponding recess (s) (36) of the working tool (6) passed through) and is guided therein.
    [7]
    7. Device according to one of claims 4 to 6, characterized in that between the working tool (6) and the hollow body (1) in its volume and / or its thickness or height variable spacer body (37) is arranged.
    [8]
    8. The device according to claim 7, characterized in that the spacer body (37) is a hollow body, which changes its volume by supplying or discharging a fluid, in particular a water-enlargeable balloon body.
    [9]
    9. Apparatus according to claim 7 or 8, characterized in that the spacer body (37) is a shank (5) surrounding and both on the working tool (6) and on the hollow body (1) in the region of the inlet opening (3) fitting annular tire ,
    [10]
    10. Device according to one of claims 1 to 9, characterized in that the working tool (6) is an elbow with one of the angle head (21) outgoing, rotating about its longitudinal axis shank (5), preferably with a milling or drill head trained working head (20).
    [11]
    11. Device according to one of claims 1 to 10, characterized in that the device has a single handle (38) over which the working tool (6) and the hollow body (1) is simultaneously tangible, durable and operable.
    [12]
    12. Device according to one of claims 1 to 11, characterized in that the path length by which the shaft (5) is movable, at most 1 cm, preferably about 0.6 cm.
    [13]
    13. Device according to one of claims 1 to 12, characterized in that the input opening (3) with a at least one linear adjustability of the shaft (5) enabling sealing element (4) is closed.
    [14]
    14. The device according to one of claims 1 to 13, characterized in that a guide element (100) is provided, which is insertable into the inlet opening (3), wherein the input opening (3) by the guide element (100) pressure-tight and in is substantially fluid-tight manner, wherein the guide element (100) has a through recess (101) through which the shaft (5) is feasible and inserted into the hollow body (1) and wherein the guide member (100) optionally a connection (108) for a working medium for applying an internal pressure in the pressure chamber (7) or in the hollow body (1), wherein the guide element (100) optionally reversible and non-destructive on the hollow body (1) attachable and removable from this.
    [15]
    15. Device according to one of claims 1 to 14, characterized in that the shaft (5), in particular in the recess (101), pressure-tight and stored and guided substantially fluid-tight and inside the pressure chamber (7) preferably a pressure of at least 1.5 bar, preferably at least 2.5 bar, and at the same time at least one feed, drive and / or control movement of the shaft (5), for example, a rotation, a circular or wobbling motion and / or an axial feed of the Shank (5).
    [16]
    16. Device according to one of claims 1 to 15, characterized in that the rotation of the shaft (5) with the linear feed of the shaft (5) is coupled via a common drive.
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    同族专利:
    公开号 | 公开日
    JP2015525578A|2015-09-07|
    WO2014000007A1|2014-01-03|
    US20150320522A1|2015-11-12|
    AT513103B1|2014-07-15|
    EP2866725A1|2015-05-06|
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    法律状态:
    2021-02-15| MM01| Lapse because of not paying annual fees|Effective date: 20200628 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA728/2012A|AT513103B1|2012-06-28|2012-06-28|Device for penetratingly extending a blind hole introduced into hard tissue, in particular the jawbone|ATA728/2012A| AT513103B1|2012-06-28|2012-06-28|Device for penetratingly extending a blind hole introduced into hard tissue, in particular the jawbone|
    EP13736744.7A| EP2866725A1|2012-06-28|2013-06-21|Angular connector/milling cutter|
    JP2015518713A| JP2015525578A|2012-06-28|2013-06-21|Angle piece / milling tool|
    PCT/AT2013/050123| WO2014000007A1|2012-06-28|2013-06-21|Angular connector/milling cutter|
    US14/411,459| US20150320522A1|2012-06-28|2013-06-21|Angular connector/milling cutter|
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