CN113951969A - Bone surface forming abrasive drill, bone surface rasping instrument and patella trimming forming instrument - Google Patents
Bone surface forming abrasive drill, bone surface rasping instrument and patella trimming forming instrument Download PDFInfo
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- CN113951969A CN113951969A CN202111200070.8A CN202111200070A CN113951969A CN 113951969 A CN113951969 A CN 113951969A CN 202111200070 A CN202111200070 A CN 202111200070A CN 113951969 A CN113951969 A CN 113951969A
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 119
- 210000004417 patella Anatomy 0.000 title claims abstract description 85
- 238000009966 trimming Methods 0.000 title claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 44
- 238000000227 grinding Methods 0.000 claims abstract description 28
- 206010006514 bruxism Diseases 0.000 claims description 21
- 238000007493 shaping process Methods 0.000 claims description 8
- 238000003801 milling Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 208000010392 Bone Fractures Diseases 0.000 abstract description 5
- 230000000399 orthopedic effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 3
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- 238000005498 polishing Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 210000000629 knee joint Anatomy 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 206010005963 Bone formation increased Diseases 0.000 description 1
- 206010065687 Bone loss Diseases 0.000 description 1
- 206010007710 Cartilage injury Diseases 0.000 description 1
- 206010066054 Dysmorphism Diseases 0.000 description 1
- 206010060820 Joint injury Diseases 0.000 description 1
- 241000283984 Rodentia Species 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/1615—Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1635—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for grafts, harvesting or transplants
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1659—Surgical rasps, files, planes, or scrapers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
- A61B17/1675—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the knee
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B2017/1602—Mills
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
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Abstract
The invention discloses a bone surface forming abrasive drill, a bone surface rasping instrument and a patella trimming and forming instrument, and belongs to the technical field of orthopedic surgical instruments. The broken bone generated by the bone surface forming abrasive drill during grinding the bone surface can directly fall into the broken bone cavity, the collection is more convenient, the broken bone generated during grinding the bone surface does not need to pass through the surface of the first fan-shaped base and the bone cutting surface and then fall into the broken bone cavity, so that the surface of the first fan-shaped base and the bone cutting surface are not influenced, the surface of the first fan-shaped base is not easy to wear, the smoothness of the bone cutting surface can be kept, and the bone surface forming abrasive drill is suitable for surface finishing of various bones such as patella.
Description
Technical Field
The invention relates to the technical field of orthopedic surgical instruments, in particular to a bone surface forming abrasive drill, a bone surface rasping instrument and a patella trimming forming instrument.
Background
In the knee joint injury replacement, patella injury exists, and two ways of treatment exist in general clinical operation: patella prosthesis replacement approaches and non-standard manual treatment approaches.
The replacement mode of the patella prosthesis refers to that the surface of the patella is cut off under a power device by adopting an operation mode under the condition of patella injury, cartilage injury or peripheral hyperosteogeny, and the corresponding type of patella prosthesis is installed in a replacement mode.
The non-standard manual treatment mode is that in the clinical operation process of the knee joint, under the condition of patella injury or hyperplasia and dysmorphism of surrounding tissues, an operator carries out approximate shape manual repair through non-standard instruments, such as rongeurs, bone files, osteotomes and other instruments.
The inventor finds in the research process that the prior art has the following problems in the treatment process of the patella or other bones through the bone surface forming abrasive drill: the broken bone generated when the existing bone surface forming abrasive drill grinds the bone is easy to remain between the surface of the bone surface forming abrasive drill and the cutting surface of the bone, the surface of the bone surface forming abrasive drill is easy to wear, and the smoothness of the cutting surface of the bone cannot be maintained.
Disclosure of Invention
The invention aims to provide a bone surface forming abrasive drill, a bone surface rasping instrument and a patella trimming and forming instrument which are not easy to abrade the surface of the bone surface forming abrasive drill and can keep the smooth finish of the cutting surface of a bone.
In order to solve the technical problems, the invention provides the following technical scheme:
in one aspect, a bone shaping burr is provided that includes a power instrument connecting portion and a cutting portion, the cutting portion including at least two first fan-shaped bases extending in a radial direction, the first fan-shaped bases being provided with grinding teeth arranged in a radial direction to form a fractured bone cavity between adjacent first fan-shaped bases.
Furthermore, be equipped with between power apparatus connecting portion and the cutting part and be used for with bone surface rasping apparatus upper locating ring matched with guide part, the external diameter of guide part with the internal diameter phase-match of locating ring.
Further, the guide part comprises at least two second fan-shaped bases extending along the radial direction, and the first fan-shaped base is positioned on the second fan-shaped base;
and/or the upper end of the guide part is provided with a blocking surface matched with the upper end surface of the positioning ring, and the diameter of the blocking surface is larger than that of the positioning ring;
and/or the outer diameter of the cutting part is smaller than the outer diameter of the guide part.
Furthermore, the grinding teeth are arranged on the front edge of the first fan-shaped base in the rotating direction;
and/or the grinding surface of the bone surface forming grinding drill is an inner arc-shaped grinding surface;
and/or at least two grinding teeth on each first fan-shaped base are arranged at intervals;
and/or the cross section of the grinding tooth is triangular, and an included angle between the bottom side of the triangle and the side in front of the rotation direction is a right angle.
In another aspect, a bone surface rasping device is provided, which comprises the bone surface forming burr.
In another aspect, a patella trimming and forming instrument is provided, which comprises a patella fixer for laterally clamping a patella, wherein the patella fixer is provided with a milling drill guider and a bearing component for bearing the patella, and the milling drill guider is provided with the bone surface forming milling drill.
Further, the patella fixator comprises a pair of clamp bodies hinged in the middle, and each clamp body comprises a clamp head and a clamp handle.
Furthermore, the articulated shaft department of a pair of pincers bodies is equipped with the base station, the brill director includes fixed connection and is in fixed connection portion on the base station and be located fixed connection portion the place ahead is used for fixing a position bone face shaping brill's holding ring.
Furthermore, be equipped with angle adjusting device on the abrasive drilling director, angle adjusting device is including setting firmly gear on the base station, fixed connection portion is the cover and is established on the gear and can wind gear revolve's annular fixed connection portion, the rear of annular fixed connection portion is equipped with the opening, be equipped with in the opening can the back-and-forth movement and with the locking tooth of gear engaged with mutually.
Furthermore, the angle adjusting device also comprises an installation platform positioned behind the opening, a transverse through hole and a vertical installation hole perpendicular to the transverse through hole are formed in the installation platform, a linear handle capable of moving back and forth penetrates through the transverse through hole, the locking teeth are arranged in front of the middle of the linear handle, a guide post matched with the vertical installation hole is arranged behind the middle of the linear handle, and a spring is arranged behind the guide post in the vertical installation hole; the middle part of the in-line handle is provided with a vertical through hole which is a long round hole extending in the front-back direction, and a fixing pin penetrates through the long round hole.
Furthermore, a knob which is in driving connection with the supporting piece and can adjust the height of the supporting piece is arranged at the front part of the base platform, and a scale mark for displaying the height of the supporting piece is arranged at the front part of the base platform;
and/or the forceps head is in an arc shape which is bent inwards;
and/or the inner side of the tong head is provided with convex teeth;
and/or a self-locking switch is arranged on the clamp handle of one of the clamp bodies, the tail end of the self-locking switch is connected with a push sheet, and the tail end of the push sheet is used for extruding the outer surface of the clamp head of the other clamp body;
and/or a torsional spring which enables the forceps handles to be in a normally open state is arranged at the hinged shaft of the pair of forceps bodies.
Furthermore, the supporting piece comprises a supporting piece main body, a pair of supporting rods which are parallel to each other and extend forwards are arranged at the front end of the supporting piece main body, and the knob is connected with the supporting piece main body in a driving mode.
The invention has the following beneficial effects:
the invention relates to a bone surface forming abrasive drill, which comprises a power instrument connecting part and a cutting part, wherein the cutting part comprises at least two first fan-shaped bases extending along the radial direction, the first fan-shaped bases are provided with grinding teeth distributed along the radial direction, so that a bone crushing cavity is formed between the adjacent first fan-shaped bases, the bone crushing generated by the grinding teeth during bone surface grinding can directly fall into the bone crushing cavity, the collection is more convenient, and the bone crushing generated during bone surface grinding does not need to slide into the bone crushing cavity through the surfaces of the first fan-shaped bases and a bone cutting surface, so that the surfaces of the first fan-shaped bases and the bone cutting surface are not influenced, the surfaces of the first fan-shaped bases are not easy to wear, and the smoothness of the bone cutting surface can be kept. The invention is not easy to abrade the surface of the bone surface molding abrasive drill, and can keep the smooth finish of the cutting surface of the bone.
Drawings
FIG. 1 is a front view of a facet molding burr of the present invention;
FIG. 2 is a perspective view of the facet shaping burr of the present invention;
FIG. 3 is a schematic cross-sectional view of a grinding tooth in the bone contouring burr of the present invention;
FIG. 4 is a schematic diagram of the overall construction of the patella trimming and shaping instrument of the present invention;
FIG. 5 is a schematic view of the assembly of the patella fixator and the supporting member in one direction in the patella trimming and forming instrument of the present invention;
FIG. 6 is a schematic view of the assembly of the patella fixator and the supporting component in another direction of the patella trimming and forming instrument of the present invention;
fig. 7 is a schematic structural view of a drill guide and an angle adjustment device in the patella trimming and forming instrument of the present invention, wherein (a) is a front view and (b) is a front sectional view;
fig. 8 is a schematic view of the fit relationship between the drill milling guide and the angle adjusting device and the gear in the patella trimming and forming instrument of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
In one aspect, the present invention provides a bone contouring burr, as shown in fig. 1-3, the bone contouring burr 3 comprising a power instrument coupling portion 31 and a cutting portion 33, the cutting portion 33 comprising at least two first fan-shaped bases 331 extending in a radial direction, the first fan-shaped bases 331 being provided with radially arranged grinding teeth 3311, thereby forming a fractured bone cavity 332 between adjacent first fan-shaped bases 331. In the embodiment, there are three first fan-shaped bases 331, and it is understood that in other implementation manners, there may be two or four first fan-shaped bases 331, and the embodiment is not limited thereto.
The invention relates to a bone surface forming abrasive drill, which comprises a power instrument connecting part and a cutting part, wherein the cutting part comprises at least two first fan-shaped bases extending along the radial direction, the first fan-shaped bases are provided with grinding teeth distributed along the radial direction, so that a bone crushing cavity is formed between the adjacent first fan-shaped bases, the bone crushing generated by the grinding teeth during bone surface grinding can directly fall into the bone crushing cavity, the collection is more convenient, and the bone crushing generated during bone surface grinding does not need to slide into the bone crushing cavity through the surfaces of the first fan-shaped bases and a bone cutting surface, so that the surfaces of the first fan-shaped bases and the bone cutting surface are not influenced, the surfaces of the first fan-shaped bases are not easy to wear, and the smoothness of the bone cutting surface can be kept. The invention is not easy to abrade the surface of the bone surface molding abrasive drill, and can keep the smooth finish of the cutting surface of the bone.
In order to facilitate the positioning of the bone surface forming burr, a guide part 32 which is matched with a positioning ring 42 on the bone surface filing instrument can be arranged between the power instrument connecting part 31 and the cutting part 33, the power instrument connecting part 31, the guide part 32 and the cutting part 33 can be sequentially connected from top to bottom (namely from right to left in fig. 1), and the outer diameter of the guide part 32 is matched with the inner diameter of the positioning ring 42 and can be matched with and used for fixing the bone surface forming burr; specifically, the guide portion 32 may be cylindrical, and the bone surface can be stably ground under the action of the bone surface forming burr 3 by the cylindrical guide function.
The guide portion 32 may include at least two second fan-shaped seats 321 extending in a radial direction, and the first fan-shaped seats 331 are located on the second fan-shaped seats 321, so that the volume of the cavity 332 can be increased. In the embodiment shown in the figures, the cutting portion 33 comprises three first radially extending fan-shaped bases 331 and the guiding portion 32 comprises three second radially extending fan-shaped bases 321, in which case the cutting portion 33 and the guiding portion 32 are each in the shape of a three-leaf fan. The number of the second fan bases 321 may correspond to that of the first fan bases 331.
As shown in fig. 1-2, to limit the grinding depth, the upper end of the guide portion 32 may be provided with a stop surface 322 that mates with the upper end surface of the retaining ring 42, the stop surface 322 having a diameter greater than the diameter of the retaining ring 42. The outer diameter of the cutting portion 33 may be smaller than the outer diameter (i.e., the diameter-variable structure) of the guide portion 32, for example, the ratio of the outer diameter of the cutting portion 33 (i.e., the outer diameter of the first fan base 331) to the outer diameter of the guide portion 32 (i.e., the outer diameter of the second fan base 321) may be 0.6 to 0.8, such as 0.67, 0.7, 0.75, etc., to avoid the guide portion 32 and improve the overall strength of the bone contouring burr 3. The length (length in the left-right direction in fig. 1) of the second fan base 321 may be 2-3 times the length of the first fan base 331, and the overall strength of the bone surface forming burr 3 is optimal.
Preferably, the grinding teeth 3311 are provided at the front edge in the rotation direction of the first fan base 331 so as to collect the crushed bones more conveniently. The grinding surface of the facet-forming burr 3 (i.e., the left side surface of the cutting portion 33 in fig. 1) is preferably an inner arcuate grinding surface (see fig. 1-2) to accommodate patella modification, enabling the complete patellar contour to be modified. The grinding teeth 3311 on each of the first fan-shaped bases 331 may be at least two and arranged at intervals, and the interval arrangement can greatly reduce the rotation resistance of the cutting part 33. In the embodiment shown, the number of grinding teeth 3311 on the first fan base 331 is two. As shown in fig. 3, the cross-sectional shape of the grinding tooth 3311 is preferably a triangle, and the included angle between the base of the triangle and the side in front in the rotation direction is preferably a right angle, which can achieve both grinding efficiency and strength of the grinding tooth, facilitating the grinding of the patella.
In another aspect, a bone surface rasping device for joint replacement is provided, which comprises the bone surface shaping burr. Since the bone surface forming abrasive drill has the same structure as the above, the detailed description is omitted here.
The bone surface forming abrasive drill in the bone surface rasping instrument for joint replacement comprises a power instrument connecting part and a cutting part, wherein the cutting part comprises at least two first fan-shaped bases extending along the radial direction, the first fan-shaped bases are provided with grinding teeth distributed in the radial direction, so that a bone crushing cavity is formed between the adjacent first fan-shaped bases, the crushed bone generated by the grinding teeth during bone surface grinding can directly fall into the bone crushing cavity, the collection is more convenient, and the crushed bone generated during bone surface grinding does not need to slide into the bone crushing cavity through the surfaces of the first fan-shaped bases and a bone cutting surface, so that the surfaces of the first fan-shaped bases and the bone cutting surface are not influenced, the surfaces of the first fan-shaped bases are not easily abraded, and the smoothness of the bone cutting surface can be kept. The invention is not easy to abrade the surface of the bone surface molding abrasive drill, can keep the smooth finish of the cutting surface of the bone, and is suitable for surface finishing of various bones such as patella, femur and the like.
In another aspect, a patella trimming and forming instrument is provided, as shown in fig. 4-8, which includes a patella fixer 1 for laterally clamping a patella, a burr guide 4 and a bearing component 2 for bearing the patella are provided on the patella fixer 1, and the above bone surface forming burr 3 is provided on the burr guide 4. Since the bone surface forming abrasive drill has the same structure as the above, the detailed description is omitted here.
When the device is used, the supporting part 2 is firstly placed on one side surface (namely the outer surface) of the patella to be polished, so that the patella is supported on the supporting part 2, then the patella to be polished is fixedly clamped from the side surface by using the patella fixer 1, and finally the bone surface forming abrasive drill 3 on the abrasive drill guide 4 is used for polishing the other side surface (namely the inner surface) of the patella to be polished.
During research, the inventor finds that the patella prosthesis replacement mode in the prior art has large damage to a patient, needs to resect a large amount of patella and is not the optimal choice from the perspective of patient recovery or bone loss; the nonstandard manual processing mode has larger nonstandard property, the good repairing condition cannot be standardized, the patella cannot be accurately trimmed and formed, and the condition of poor quality exists.
The patella trimming and forming instrument comprises a patella fixer for clamping a patella from the side surface, and can be used for conveniently clamping and fixing the patella to be polished; the patella fixer is provided with a grinding drill guider and a supporting piece for bearing the patella, the grinding drill guider is provided with the bone surface forming grinding drill, the grinding drill guider can be used for conveniently positioning the bone surface forming grinding drill, and the supporting piece can be used for conveniently supporting the patella to be polished; compared with the patella prosthesis replacement mode and the non-standard manual processing mode in the prior art, an operator can accurately and quickly trim and form the patella to be polished, and the bone mass of a patient is reserved to the greatest extent. The patella trimming and forming instrument provided by the invention does not need to cut off a large amount of patella, can precisely trim and form the patella, is not easy to abrade the surface of a bone surface forming abrasive drill, and can keep the smooth finish of a bone cutting surface.
As shown in fig. 4 to 6, in order to clamp and fix the patella to be polished, the patella fixator 1 is preferably in the form of a clamping forceps, that is, a pair of forceps bodies 11, 11 'hinged at the middle part are included, and each of the forceps bodies 11, 11' includes a forceps head 111, 111 'and a forceps handle 112, 112', so that the patella to be polished can be clamped and fixed easily and conveniently in a labor-saving manner. When the clamp is used, the handles 112 and 112 ' of the pair of clamp bodies 11 and 11 ' are held by hands and driven, so that the clamp heads 111 and 111 ' can clamp and fix the patella to be polished.
As shown in fig. 4 and 7-8, in order to facilitate the positioning of the bone contouring burr 3, a base 113 may be provided at the hinge axis of the pair of forceps bodies 11, 11', and the burr guide 4 may include a fixing connection portion 41 fixedly connected to the base 113, and a positioning ring 42 located in front of the fixing connection portion 41 for positioning the bone contouring burr 3.
As shown in fig. 7-8, in order to perform the trimming and forming on the inner surface of the patella to be polished more precisely, the drill guide 4 may be provided with an angle adjusting device, which may adopt various structural forms that can be easily conceived by those skilled in the art, and for the convenience of implementation, the following structural forms are preferably adopted in the present invention:
the angle adjusting device comprises a gear 43 fixed on the base 113, the fixed connection part 41 is an annular fixed connection part which is sleeved on the gear 43 and can rotate around the gear 43, an opening 411 is arranged behind the annular fixed connection part, and a locking tooth 451 which can move back and forth and can be meshed with the gear 43 is arranged in the opening 411.
In order to facilitate driving the locking teeth 451 to move back and forth, the angle adjusting device may further include a mounting table 44 located behind the opening 411, a horizontal through hole 441 and a vertical mounting hole 442 perpendicular to the horizontal through hole 441 are provided in the mounting table 44, a linear handle 45 capable of moving back and forth is inserted in the horizontal through hole 441, the locking teeth 451 are provided in front of a middle portion of the linear handle 45, a guide post 452 matching with the vertical mounting hole 442 is provided behind the middle portion of the linear handle 45, and a spring 46 is provided behind the guide post 452 in the vertical mounting hole 442 to push the guide post 452. In order to position the in-line handle 45, a vertical through hole 453 may be formed in the middle of the in-line handle 45, the vertical through hole 453 being a long circular hole extending in the front-rear direction, and a fixing pin 454 is inserted into the long circular hole. In the embodiment shown in the figures, the gear 43 may be disposed below the knob 1131, making the overall structure more compact.
When the left and right directions of the grinding drill guide 4 need to be adjusted in the operation, the linear handle 45 is pressed backwards, the guide column 452 of the linear handle 45 moves backwards and gradually compresses the spring 46 in the vertical mounting hole 442 until the locking tooth 451 in the front of the middle part of the linear handle 45 is separated from the gear 43 on the base platform 113, and the unlocking is completed; at this time, the fixed connection portion 41 of the drill guide 4 is rotated, the fixed connection portion 41 is finely adjusted in the axial direction with the gear 43 on the base 113 as the center of rotation, and after the adjustment is completed, the linear handle 45 is released, and the linear handle 45 is moved forward by the tension of the spring 46, so that the locking tooth 451 in front of the middle portion of the linear handle 45 is reengaged with the gear 43 on the base 113 and is then relocked. The angle adjusting device can adjust the limit adjusting angles of the left side and the right side by setting the number of teeth on the gear 43 according to practical application. In this embodiment, the angle adjusting device can complete the angle adjustment of each 55 degrees on the left and right sides, can make fine adjustment under the condition that the patella cannot be clamped by the patella fixator accurately in the center, and can be matched with the bone surface forming abrasive drill 3 to complete the shaping repair of the inner surface of the patella more accurately.
As shown in fig. 4 to 6, the front portion of the base 113 may be provided with a knob 1131 for driving the support 2 and adjusting the height of the support 2, and the front portion of the base 113 is provided with a graduation 1132 for displaying the height of the support 2. During the use, before kneecap fixer centre gripping or the centre gripping treat the process of polishing the patella, can guarantee that 2 stable bears the weight of the patella of treating polishing of bearing part through the accurate regulation bearing part 2 height of knob 1131 and scale mark 1132. As for how the knob 1131 is driven to connect with the supporting member 2, the conventional techniques in the art can be adopted, for example, a screw rod is fixedly arranged below the knob, and a vertical moving sleeve and the like which are in threaded fit with the screw rod are arranged on the supporting member.
For stable gripping of the patella to be sanded, the forceps heads 111, 111' are preferably curved inwardly. The inner side of the forceps heads 111, 111' may be provided with a convex tooth 1112, which can more firmly grip the patella to be polished.
After the pair of forceps bodies 11 and 11 'clamp the patella to be polished, the opening angles of the forceps heads 111 and 111' can be preferably locked to reduce manual operation, so that a self-locking switch is preferably arranged on the forceps handle of one of the forceps bodies, the tail end of the self-locking switch is connected with a push sheet (not shown), the tail end of the push sheet is used for extruding the outer surface of the forceps head of the other forceps body to lock the other forceps body, and the structural form can realize stepless self-locking and is suitable for the patella to be polished of any size. In the embodiment shown in the figures, a self-locking switch 1121 is disposed on the handle 112 of the left forceps body 11, and at this time, the self-locking switch 1121 is in a locked state when in the front, and the self-locking switch 1121 is in an unlocked state when in the rear.
The hinge axis of the pair of forceps bodies 11, 11 ' can be provided with a torsion spring 114 for keeping the forceps handles 112, 112 ' in a normally open state, so that the forceps handles 112, 112 ' can be kept in a normally open state for convenient use.
The support 2 may take various forms as will be readily apparent to those skilled in the art, for example the support may be a support plate; in view of the shape of the patella, to achieve a better bearing effect, the support 2 preferably includes a support body 21, a pair of support rods 22 extending forward and parallel to each other are provided at the front end of the support body 21, and a knob 1131 is drivingly connected to the support body 21.
In the invention, the grinding surface of the bone surface forming abrasive drill 3 is an inner arc-shaped grinding surface, preferably a spherical cambered surface, so that a cambered surface is formed in the cutting process, and a more complete patella cambered surface structure can be better trimmed. The bone surface forming abrasive drill 3 can be divided into different models according to the sizes of the patella of different people, and the bone surface forming abrasive drill with different models can be flexibly selected according to the requirements during use.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. The bone surface forming abrasive drill is characterized in that the bone surface forming abrasive drill (3) comprises a power instrument connecting part (31) and a cutting part (33), the cutting part (33) comprises at least two first fan-shaped bases (331) extending along the radial direction, and the first fan-shaped bases (331) are provided with grinding teeth (3311) arranged in the radial direction, so that a bone crushing cavity (332) is formed between the adjacent first fan-shaped bases (331).
2. The bone contouring burr of claim 1, wherein a guide portion (32) is provided between said power instrument connection portion (31) and said cutting portion (33) for engaging a positioning ring (42) of a bone resurfacing instrument, said guide portion (32) having an outer diameter matching an inner diameter of said positioning ring (42).
3. The bone contouring burr of claim 2, wherein said guide (32) comprises at least two second radially extending fan-shaped seats (321), said first fan-shaped seat (331) being located on said second fan-shaped seat (321);
and/or the upper end of the guide part (32) is provided with a blocking surface (322) matched with the upper end surface of the positioning ring (42), and the diameter of the blocking surface (322) is larger than that of the positioning ring (42);
and/or the outer diameter of the cutting part (33) is smaller than the outer diameter of the guide part (32).
4. The bone contouring burr of any of claims 1-3, wherein said grinding tooth (3311) is provided at a rotationally forward edge of said first fan shaped base (331);
and/or the grinding surface of the bone surface molding grinding drill (3) is an inner arc-shaped grinding surface;
and/or at least two grinding teeth (3311) on each first fan-shaped base (331) are arranged at intervals;
and/or the cross-sectional shape of the grinding tooth (3311) is a triangle, and the included angle between the bottom side of the triangle and the side in front of the rotation direction is a right angle.
5. A bone resurfacing instrument comprising the bone contouring burr of any of claims 1 to 4.
6. A patella trimming and forming instrument is characterized by comprising a patella fixator (1) for laterally clamping a patella, wherein a milling drill guide (4) and a supporting piece (2) for bearing the patella are arranged on the patella fixator (1), and a bone surface forming milling drill (3) as claimed in any one of claims 1 to 4 is arranged on the milling drill guide (4).
7. The patella resurfacing device according to claim 6, characterized in that the patella fixator (1) comprises a pair of forceps bodies (11, 11 ') hinged in the middle, each of the forceps bodies (11, 11') comprising a forceps head (111, 111 ') and a forceps handle (112, 112').
8. The patella shaping device according to claim 7, wherein a base (113) is provided at the hinge axis of the pair of forceps bodies (11, 11'), and the burr guide (4) comprises a fixing connection (41) fixedly connected to the base (113), and a positioning ring (42) located in front of the fixing connection (41) for positioning the bone shaping burr (3).
9. The patella trimming and forming instrument according to claim 8, wherein an angle adjusting device is arranged on the drill grinding guide (4), the angle adjusting device comprises a gear (43) fixedly arranged on the base (113), the fixed connecting part (41) is an annular fixed connecting part which is sleeved on the gear (43) and can rotate around the gear (43), an opening (411) is arranged behind the annular fixed connecting part, and a locking tooth (451) which can move back and forth and can be meshed with the gear (43) is arranged in the opening (411).
10. The patella trimming and forming instrument according to claim 9, wherein the angle adjusting device further comprises a mounting table (44) located behind the opening (411), a transverse through hole (441) and a vertical mounting hole (442) perpendicular to the transverse through hole (441) are arranged in the mounting table (44), a linear handle (45) capable of moving back and forth penetrates through the transverse through hole (441), the locking teeth (451) are arranged in front of the middle of the linear handle (45), a guide column (452) matched with the vertical mounting hole (442) is arranged behind the middle of the linear handle (45), and a spring (46) is arranged behind the guide column (452) in the vertical mounting hole (442); a vertical through hole (453) is formed in the middle of the linear handle (45), the vertical through hole (453) is a long round hole extending in the front-back direction, and a fixing pin (454) penetrates through the long round hole.
11. The patella trimming and forming instrument according to claim 8, wherein the anterior portion of the abutment (113) is provided with a knob (1131) which is connected with the support (2) in a driving manner and can adjust the height of the support (2), and the anterior portion of the abutment (113) is provided with a scale line (1132) for displaying the height of the support (2);
and/or the forceps heads (111, 111') are in an arc shape which is bent inwards;
and/or the inner sides of the forceps heads (111, 111') are provided with convex teeth (1112);
and/or a self-locking switch (1121) is arranged on the forceps handle (112) of one of the forceps bodies (111), the tail end of the self-locking switch (1121) is connected with a push sheet, and the tail end of the push sheet is used for extruding the outer surface of the forceps head (112 ') of the other forceps body (111');
and/or a torsional spring (114) which enables the forceps handles (112, 112 ') to be kept in a normally open state is arranged at the hinged shaft of the pair of forceps bodies (11, 11').
12. The patella trimming device according to claim 11, wherein the support (2) comprises a support body (21), the support body (21) is provided at a front end thereof with a pair of support rods (22) extending in parallel and forward direction, and the knob (1131) is drivingly connected to the support body (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200070.8A CN113951969B (en) | 2021-10-14 | 2021-10-14 | Bone surface forming grinding drill, bone surface grinding file instrument and patella trimming forming instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200070.8A CN113951969B (en) | 2021-10-14 | 2021-10-14 | Bone surface forming grinding drill, bone surface grinding file instrument and patella trimming forming instrument |
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| CN113951969A true CN113951969A (en) | 2022-01-21 |
| CN113951969B CN113951969B (en) | 2023-12-08 |
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| Publication number | Publication date |
|---|---|
| CN113951969B (en) | 2023-12-08 |
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