CN109394300B - Marrow cavity file - Google Patents
Marrow cavity file Download PDFInfo
- Publication number
- CN109394300B CN109394300B CN201811430709.XA CN201811430709A CN109394300B CN 109394300 B CN109394300 B CN 109394300B CN 201811430709 A CN201811430709 A CN 201811430709A CN 109394300 B CN109394300 B CN 109394300B
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- CN
- China
- Prior art keywords
- file
- intramedullary
- outer side
- cavity
- end part
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- A61B17/164—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans intramedullary
-
- 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
- A61B17/1664—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 hip
- A61B17/1668—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 hip for the upper femur
Abstract
The invention discloses a intramedullary cavity file, comprising: the proximal end part comprises a first inner side surface and a first outer side surface which are oppositely arranged, the first inner side surface and the first outer side surface are of cambered surface structures, the connecting surface of the first inner side surface and the first outer side surface is two symmetrical first opposite side surfaces, transverse grooves are formed in the first inner side surface and the first outer side surface, oblique grooves are formed in the first opposite side surfaces, and four-side tooth-shaped structures are arranged in the oblique grooves; the middle rear end part is provided with a ring groove cutting edge in a surrounding way; the distal end portion includes a transition portion and a rotation portion that are sequentially connected, and the rotation portion is of a cylindrical structure.
Description
Technical Field
The invention relates to the field of tools for hip joint replacement surgery, in particular to a intramedullary cavity file.
Background
Most of structures of marrow cavity files in the current market are annular groove structures with downward cutting edges, and the structure has the advantages of being capable of filing a large amount of cancellous bone, guaranteeing that the shape of a marrow cavity of a femur after filing is consistent with that of a file body, and being suitable for bone cement femoral stem prostheses. This configuration does not work optimally for a biologic femoral stem, particularly a proximal fixed biologic femoral stem. The proximal end is fixed by mainly fixing the proximal end of the femoral stem by the bone ingrowth of the coating of the proximal end of the femoral stem, and the bone ingrowth is premised on sufficient cancellous bone mass and a press fit relationship with the proximal end of the femoral stem, if there is induction of cancellous bone fragments, the progress of the bone ingrowth can be quickened.
For the proximal fixed biological femoral stem, the best fixation mode with cancellous bone is proximal close fixation and distal loose fit, so as to reduce the stress shielding effect caused by the elastic modulus of the femoral stem being greater than that of bone, thereby relieving thigh pain. Most of the prior intramedullary files in the market do not consider the point, so that after the intramedullary files are filed, the femoral stem and the intramedullary are in interference fit with each other at the proximal end or the distal end.
The included angle between the connecting line of the human femoral neck and the medial femoral condyle and the lateral femoral condyle is called the anteversion angle, and in the process of filing the marrow cavity, if the anteversion angle is controlled improperly, the patient mobility is easy to be limited. The cross-sectional shape of the distal end of the current market is mostly rectangular or trapezoidal, which can lead to the fact that the driving direction of the intramedullary file is fixed at the initial stage of the contact of the intramedullary file and the femoral intramedullary cavity, and the direction is difficult to readjust at the later stage.
Disclosure of Invention
The invention designs and develops a marrow cavity file, and one of the purposes of the invention is to solve the problem that the bone quantity of cancellous bone can be reserved at the proximal end of femur to the maximum extent by arranging a ring groove cutting edge at the middle and rear end parts and arranging a four-sided tooth-shaped structure at the proximal end, so that the distal end of a proximal fixed femoral stem and a femoral marrow cavity form loose fit.
The second purpose of the invention is to solve the problem that the angle can be freely adjusted at the initial stage of the contact of the intramedullary cavity file and the intramedullary cavity by arranging the distal end part into a cylindrical structure.
The technical scheme provided by the invention is as follows:
the intramedullary cavity file comprises a proximal end part, a middle rear end part and a distal end part which are sequentially connected;
the proximal end part comprises a first inner side surface and a first outer side surface which are oppositely arranged, the first inner side surface and the first outer side surface are of cambered surface structures, the connecting surface of the first inner side surface and the first outer side surface is two symmetrical first opposite side surfaces, transverse grooves are formed in the first inner side surface and the first outer side surface, oblique grooves are formed in the first opposite side surfaces, and four-side tooth-shaped structures are arranged in the oblique grooves;
the middle rear end part is provided with a ring groove cutting edge in a surrounding way; and
the distal end portion includes a transition portion and a rotation portion that are sequentially connected, and the rotation portion is of a cylindrical structure.
Preferably, the middle rear end part comprises a second inner side surface and a second outer side surface which are oppositely arranged, the connecting surface of the second inner side surface and the second outer side surface is two symmetrical second opposite side surfaces, and annular groove cutting edges are arranged around the second inner side surface, the second outer side surface and the second opposite side surfaces.
Preferably, the method further comprises: and the handle connecting piece is fixedly arranged at the top of the proximal end part and is used for connecting the knocking handle.
Preferably, the upper section of the transition part is a trapezoid section and is used for being in transition connection with the lower section of the middle rear end part; and
the lower section of the transition part is a circular section and is used for being in transition connection with the upper section of the rotating part.
Preferably, the transverse grooves are uniformly and parallelly arranged; and
the oblique grooves are uniformly and parallelly arranged.
Preferably, the proximal end portion has a length of 60 to 70mm.
Preferably, the length of the middle rear end is 18 to 70mm.
Preferably, the distal end is 35 to 39mm in length;
wherein the length of the transition part is 18-20 mm, and the length of the rotating part is 17-19 mm.
Preferably, the radius of the cross-section circumference of the rotating portion in the distal portion is 8 to 12mm.
Preferably, the intramedullary file is made of stainless steel.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the conventional intramedullary file, the intramedullary file can reserve the bone quantity of the cancellous bone at the proximal end of the femur to the maximum extent, and is beneficial to the fixation of the femoral stem and the bone ingrowth;
2. compared with the conventional intramedullary canal file, the cancellous bone chips filed by the intramedullary canal file related to the patent are smaller, and can induce the cancellous bone to grow into the bone on the proximal coating of the femoral stem;
3. compared with the conventional intramedullary canal file, the cutting edge of the rear ring groove in the intramedullary canal file can file more bone mass, so that the distal end of the proximal fixed femoral stem and the femoral intramedullary canal form loose fit. Thereby reducing stress shielding effect and lowering probability of occurrence of thigh pain;
4. compared with the conventional intramedullary file, the bottom of the intramedullary file related to the patent is columnar, and the angle of the intramedullary file can be freely adjusted at the initial stage of contact between the intramedullary file and the intramedullary, so that the requirement of the femoral physiological anterake of a patient is met.
Drawings
Fig. 1 is a front view of a intramedullary canal file according to the present invention.
Fig. 2 is a left side view of a intramedullary canal file according to the present invention.
Fig. 3 is a perspective view of the outer side of the intramedullary canal file according to the present invention.
Fig. 4 is a perspective view of the medial side of the intramedullary file according to the present invention.
Fig. 5 is an enlarged view at a in fig. 4.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
As shown in fig. 1 to 5, a bone marrow cavity file is a tool for hip joint replacement surgery, after a femoral bone marrow cavity is filed and formed by the bone marrow cavity file, a femoral stem prosthesis is implanted, the working principle of the bone marrow cavity file is that a cutting blade on a file body is utilized to cut cancellous bone in the femoral bone marrow cavity after the bone marrow cavity is subjected to knocking force, the bone marrow cavity file is made of stainless steel, and a main structure of the bone marrow cavity file comprises a proximal end part 110, a middle and rear end part 120 and a distal end part 130 which are sequentially connected; the proximal portion 110 includes a first inner side 110a and a first outer side 110b that are disposed opposite to each other, where the first inner side 110a and the first outer side 110b are in a cambered surface structure, a connection surface between the first inner side 110a and the first outer side 110b is two symmetrical first opposite side 110c, a transverse groove is formed on the first inner side 110a and the first outer side 110b, an oblique groove is formed on the first opposite side 110c, and a four-sided tooth structure 111 is disposed in the oblique groove; the middle rear end 120 is provided with a ring groove cutting edge in a surrounding way; the distal end portion 130 includes a transition portion 131 and a rotation portion 132 connected in sequence, and the rotation portion 132 has a cylindrical structure.
In another embodiment, the middle rear end 120 includes a second inner side 120a and a second outer side 120b opposite to each other, the second inner side 120a and the second outer side 120b are connected by two symmetrical second opposite sides 120c, and annular cutting edges are disposed around the second inner side 120a, the second outer side 120b and the second opposite sides 120 c.
In another embodiment, the method further comprises: a handle connector 200 fixedly mounted on top of the proximal portion 110 for connecting a tapping handle.
In another embodiment, the upper section of the transition portion 131 is trapezoidal for transitional connection with the lower section of the middle rear end portion 120; the lower section of the transition portion 131 is a circular section for transition connection with the upper section of the rotating portion 132.
In another embodiment, the transverse grooves are uniformly parallel and the oblique grooves are uniformly parallel.
In another embodiment, the proximal portion 110 is 60-70 mm in length, the middle rear portion 120 is 18-70 mm in length, and the distal portion 130 is 35-39 mm in length; wherein the transition portion 131 of the distal end portion 130 has a length of 18 to 20mm, the rotation portion 132 has a length of 17 to 19mm, and the rotation portion 132 in the distal end portion 130 has a cross-sectional circumferential radius of 8 to 12mm.
The working principle of the invention comprises: when the hip joint replacement surgery is performed, the intramedullary cavity file is connected with the handle through the handle connecting piece, the intramedullary cavity file is driven into the intramedullary cavity through the knocking handle, so that the intramedullary cavity file is molded into a shape opposite to the femoral stem prosthesis, at the initial stage of contact between the intramedullary cavity file and the femoral marrow cavity, the rotating part of the distal end part of the intramedullary cavity file is columnar and has no teeth, the intramedullary cavity file is driven into the intramedullary cavity after the forward inclination direction is adjusted, the distal end of the proximal end fixed femoral stem and the femoral intramedullary cavity form loose fit in the process of driving the intramedullary cavity by the middle and rear end annular cutting edges, a part of loose bone can be cut by the proximal end four-face tooth-shaped structure in the process of driving the femoral cavity, but a part of loose bone can be reserved at the same time when the intramedullary cavity file is driven into the femoral cavity, the proximal end part of the femoral prosthesis and the femoral cavity form interference fit, the bone mass is reserved to the maximum extent, the loose bone shape is small, and the loose bone shape can be cut by the four-face tooth-shaped structure is induced to be formed, and the bone fragment is fixed at the proximal end of the femoral stem.
Test examples
Firstly, randomly selecting 5 common marrow cavity files with the same specification and corresponding femoral stem prostheses thereof, wherein the numbering rules are shown in table 1:
TABLE 1 sample numbering convention
| Sample numbering | Sample description | Sample specification | Prosthesis numbering | Description of the prosthesis | Prosthesis specification |
| F1 | Invention marrow cavity file | 3# | J1 | Femur stem | 3# |
| F2 | Invention marrow cavity file | 3# | J2 | Femur stem | 3# |
| F3 | Invention marrow cavity file | 3# | J3 | Femur stem | 3# |
| F4 | Invention marrow cavity file | 3# | J4 | Femur stem | 3# |
| F5 | Invention marrow cavity file | 3# | J5 | Femur stem | 3# |
| P1 | Common marrow cavity file | 3# | J6 | Femur stem | 3# |
| P2 | Common marrow cavity file | 3# | J7 | Femur stem | 3# |
| P3 | Common marrow cavity file | 3# | J8 | Femur stem | 3# |
| P4 | Common marrow cavity file | 3# | J9 | Femur stem | 3# |
| P5 | Common marrow cavity file | 3# | J10 | Femur stem | 3# |
Then, 10 foam false bones, a 250ml measuring cylinder, a tensile testing machine and auxiliary instruments including a intramedullary canal file handle, a hammer, a clamp for fixing the foam false bones and a femoral stem handle were prepared.
Finally, experiments were performed comprising the following steps:
the foam bone clamp is used for fixing foam bone, the intramedullary cavity file and the intramedullary cavity file handle are connected, the intramedullary cavity file related to the invention is driven into the femoral intramedullary cavity of the foam bone, the consistent driving position of each intramedullary cavity file is ensured, and the intramedullary cavity file is pulled out.
And installing a femoral stem and a femoral stem handle, and driving the femoral stems with the prosthesis numbers J1-J5 into the prepared femoral medullary cavity to ensure the implantation position of each femoral stem to be consistent.
And (3) connecting the tensile testing machine with a threaded hole on the shoulder of the femoral stem, vertically extracting the femoral stem prosthesis, and recording the maximum extraction force.
Similarly, a femoral canal is prepared with a common canal file, a femoral stem, numbered J6-J10, is driven into the prepared femoral canal, and the maximum extraction force is measured.
Washing the medullary cavity of 10 foam bones, injecting purified water into the medullary cavity, and measuring the volume of the purified water carried by each foam bone by using a measuring cylinder; experimental results as shown in table 2, the intramedullary canal file according to the present patent is capable of retaining more bone mass of the femoral intramedullary canal and increasing the fixation strength of the femoral stem prosthesis compared to the conventional intramedullary canal file.
Table 2 test results
| Sample numbering | Sample description | Femoral stem prosthesis extraction force/N | Purified water volume/ml in the medullary cavity |
| F1 | Invention marrow cavity file | 181 | 226 |
| F2 | Invention marrow cavity file | 178 | 232 |
| F3 | Invention marrow cavity file | 185 | 229 |
| F4 | Invention marrow cavity file | 170 | 223 |
| F5 | Invention marrow cavity file | 174 | 231 |
| P1 | Common marrow cavity file | 158 | 205 |
| P2 | Common marrow cavity file | 161 | 211 |
| P3 | Common marrow cavity file | 152 | 213 |
| P4 | Common marrow cavity file | 165 | 206 |
| P5 | Common marrow cavity file | 151 | 199 |
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. The intramedullary cavity file is characterized by comprising a proximal end part, a middle rear end part and a distal end part which are sequentially connected;
the proximal end part comprises a first inner side surface and a first outer side surface which are oppositely arranged, the first inner side surface and the first outer side surface are of cambered surface structures, the connecting surface of the first inner side surface and the first outer side surface is two symmetrical first opposite side surfaces, transverse grooves are formed in the first inner side surface and the first outer side surface, oblique grooves are formed in the first opposite side surfaces, and four-side tooth-shaped structures are arranged in the oblique grooves;
the middle and rear end parts are circumferentially provided with annular groove cutting edges, so that the distal end of the proximal fixed femoral stem is in loose fit with the femoral medullary cavity; and
the distal end portion includes a transition portion and a rotation portion that are sequentially connected, and the rotation portion is of a cylindrical structure.
2. The intramedullary file of claim 1 wherein the medial posterior end includes oppositely disposed second medial and second lateral sides, the junction of the second medial and second lateral sides being two symmetrical second opposite sides, and a pocket cutting edge disposed around the second medial, second lateral and second opposite sides.
3. The intramedullary cavity file of claim 2, further comprising: and the handle connecting piece is fixedly arranged at the top of the proximal end part and is used for connecting the knocking handle.
4. A intramedullary file of claim 3, wherein the transition portion has an upper cross-section that is trapezoidal for transitional connection with a lower cross-section of the intermediate posterior end; and
the lower section of the transition part is a circular section and is used for being in transition connection with the upper section of the rotating part.
5. The intramedullary file of any one of claims 1-4, wherein the transverse grooves are uniformly parallel; and
the oblique grooves are uniformly and parallelly arranged.
6. The intramedullary file of claim 5, wherein the proximal portion has a length of 60-70 mm.
7. The intramedullary file of claim 6 wherein the middle and rear end portions are 18-70 mm in length.
8. The intramedullary file of claim 7, wherein the distal portion is 35-39 mm long;
wherein the length of the transition part is 18-20 mm, and the length of the rotating part is 17-19 mm.
9. The intramedullary file of claim 8, wherein the radius of the circumference of the cross-section of the rotating portion in the distal portion is 8-12 mm.
10. The intramedullary file of any one of claims 6-9, wherein the intramedullary file is made of a stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811430709.XA CN109394300B (en) | 2018-11-28 | 2018-11-28 | Marrow cavity file |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811430709.XA CN109394300B (en) | 2018-11-28 | 2018-11-28 | Marrow cavity file |
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| Publication Number | Publication Date |
|---|---|
| CN109394300A CN109394300A (en) | 2019-03-01 |
| CN109394300B true CN109394300B (en) | 2023-08-04 |
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|---|---|---|---|
| CN201811430709.XA Active CN109394300B (en) | 2018-11-28 | 2018-11-28 | Marrow cavity file |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456717A (en) * | 1992-12-07 | 1995-10-10 | Plus Endoprothtik Ag | Stem for a femoral hip-joint endoprosthesis |
| WO1996009011A1 (en) * | 1994-09-21 | 1996-03-28 | Johnson Lanny L | Instrumentation for proximal femoral compaction broaching |
| US5681315A (en) * | 1995-05-31 | 1997-10-28 | Szabo; Zsolt | Bone marrow rasp |
| US6143012A (en) * | 1997-05-06 | 2000-11-07 | Orthofix S.R.L. | Intramedullary awl assembly for preparation for a femoral-style nailing |
| CN201668450U (en) * | 2010-04-23 | 2010-12-15 | 创生医疗器械(江苏)有限公司 | Medullary cavity file |
| FR2961684A1 (en) * | 2010-06-25 | 2011-12-30 | T O | Femoral shaft preparation and surgical instrument assembly for implantation of femoral rod, has receiving cavity worked by smoothing rasp including section corresponding to shape and dimension of chosen size of femoral rod |
| CN102573667A (en) * | 2009-04-02 | 2012-07-11 | 马丁·M·马劳尔 | Bone rifling system and method of preparing a bone using such system |
| CN206603794U (en) * | 2016-11-30 | 2017-11-03 | 嘉思特华剑医疗器材(天津)有限公司 | Easily import extended type femoral bone cavitas medullaris file |
| CN107647899A (en) * | 2016-07-26 | 2018-02-02 | 北京蒙太因医疗器械有限公司 | Osteotomy device for replacement knee in arthroplasty |
| CN207412212U (en) * | 2017-03-07 | 2018-05-29 | 上海长海医院 | Bone-cement type hip replacement femoral myelocavity file |
Family Cites Families (4)
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| US20040249384A1 (en) * | 2003-02-04 | 2004-12-09 | Blaha J. David | Compacting broach |
| DE102010000419A1 (en) * | 2009-12-23 | 2011-06-30 | Aesculap AG, 78532 | Modular denture rasp |
| US8778030B2 (en) * | 2011-03-24 | 2014-07-15 | Christopher G. Sidebotham | Load bearing implants |
| US9737408B2 (en) * | 2013-03-15 | 2017-08-22 | Depuy Ireland Unlimited Company | Tibial impaction guide surgical instrument and method of using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456717A (en) * | 1992-12-07 | 1995-10-10 | Plus Endoprothtik Ag | Stem for a femoral hip-joint endoprosthesis |
| WO1996009011A1 (en) * | 1994-09-21 | 1996-03-28 | Johnson Lanny L | Instrumentation for proximal femoral compaction broaching |
| US5681315A (en) * | 1995-05-31 | 1997-10-28 | Szabo; Zsolt | Bone marrow rasp |
| US6143012A (en) * | 1997-05-06 | 2000-11-07 | Orthofix S.R.L. | Intramedullary awl assembly for preparation for a femoral-style nailing |
| CN102573667A (en) * | 2009-04-02 | 2012-07-11 | 马丁·M·马劳尔 | Bone rifling system and method of preparing a bone using such system |
| CN201668450U (en) * | 2010-04-23 | 2010-12-15 | 创生医疗器械(江苏)有限公司 | Medullary cavity file |
| FR2961684A1 (en) * | 2010-06-25 | 2011-12-30 | T O | Femoral shaft preparation and surgical instrument assembly for implantation of femoral rod, has receiving cavity worked by smoothing rasp including section corresponding to shape and dimension of chosen size of femoral rod |
| CN107647899A (en) * | 2016-07-26 | 2018-02-02 | 北京蒙太因医疗器械有限公司 | Osteotomy device for replacement knee in arthroplasty |
| CN206603794U (en) * | 2016-11-30 | 2017-11-03 | 嘉思特华剑医疗器材(天津)有限公司 | Easily import extended type femoral bone cavitas medullaris file |
| CN207412212U (en) * | 2017-03-07 | 2018-05-29 | 上海长海医院 | Bone-cement type hip replacement femoral myelocavity file |
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| Publication number | Publication date |
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| CN109394300A (en) | 2019-03-01 |
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