CN2389639Y - Femoral stalk with locking screw for artificial hip joint - Google Patents
Femoral stalk with locking screw for artificial hip joint Download PDFInfo
- Publication number
- CN2389639Y CN2389639Y CN 99246271 CN99246271U CN2389639Y CN 2389639 Y CN2389639 Y CN 2389639Y CN 99246271 CN99246271 CN 99246271 CN 99246271 U CN99246271 U CN 99246271U CN 2389639 Y CN2389639 Y CN 2389639Y
- Authority
- CN
- China
- Prior art keywords
- hip joint
- artificial hip
- femoral
- femur
- locking screws
- Prior art date
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a femoral handle with locking screws for an artificial hip joint used for orthopaedics. The close end of an axial line of the femoral handle of the artificial hip joint is evenly distributed with two transverse through holes. Inner parts of the through holes are respectively provided with screws which are called locking screws and the two ends of each locking screw extend out from the femoral handle of the artificial hip joint. When used, the locking screws are disassembled and the femoral handle is inserted into a femoral marrow cavity. The two locking screws penetrate the transverse through holes of a femur passing through the femoral handle. The head part and the tail part of each screw are respectively connected with the femur. Thus the femoral handle with the locking screws can be correspondingly and firmly fixed with the femur. The stress of the femur is balanced and the bone absorption caused by stress block is avoided. The design is reasonable and the operation is convenient.
Description
This utility model relates to the fixture, the particularly femoral stem of artificial hip joint nail with lock of the artificial hip joint femoral shaft that a kind of orthopaedics uses.
Adopt the method for artificial hip joint replacing, the destruction of joint that hip joint disease such as aseptic necrosis of femoral head, rheumatoid joint cause late period is repaired, solve pain, deformity and dysfunction, rebuild a joint, received encouraging result near normal function.But as the prosthese implant into body, still have many problems to wait to solve at present artificial hip joint, wherein the femoral stem of artificial hip joint is inserted in the femoral bone cavitas medullaris, and the near end of thighbone bone absorption is to cause the one of the main reasons of operation failure at a specified future date.Under the normal condition, femur is independent prudent, after inserting femoral prosthesis, onesize gravity is then shared by femur and prosthese, so just changed the near end of thighbone normal stress and distributed, the stress part that the reason near end of thighbone bears directly reaches distal femur through the femur marrow intraluminal prosthesis, cause the stress shielding of near end of thighbone, according to Wolff ' s rule, relative normal condition, the suffered stress of femur reduces, must cause sclerotin by the increasing of hole, or adapt with it by the attenuation of cortex.Its result causes the near end of thighbone osteoporosis, and cortical bone attenuation and femoral stem are loosening.Moreover in the research of artificial hip joint, Goodman has proposed fine motion theory and corpuscular theory, thinks that these two kinds of mechanism have synergism, promptly exist a vicious cycle.Because fine motion and joint friction certainly lead to microgranule.Different microgranules activates because fine motion or the formed Interface Microstructure of foreign body reaction produce bone resorbing factor, make the bone marrow dissolving finally cause becoming flexible.
The purpose of this utility model is to provide the femoral stem of a kind of artificial hip joint nail with lock, not only can make artificial hip joint femoral shaft insert in the femoral bone cavitas medullaris and the femur relative fixed, fixed, can not produce loosening, and make femur bear gravity balance, can avoid bone absorption that causes owing to the near end of thighbone stress shielding and the drawback that produces the bone absorption factor.
The purpose of this utility model is achieved in that the femoral stem of a kind of artificial hip joint nail with lock, comprise artificial hip joint femoral shaft, hole at uniform two lateral direction penetratings of axis near-end of artificial hip joint femoral shaft is installed with the screw that artificial hip joint femoral shaft is stretched out at two ends respectively in the hole.
When this utility model uses, earlier two pieces of screws on the artificial hip joint femoral shaft are shed, treat that artificial hip joint femoral shaft inserts in the femoral bone cavitas medullaris, again two pieces of screws are penetrated femur by the cross through hole on the artificial hip joint femoral shaft, the portion end to end of screw all is connected on the femur, claim that these two pieces of screws are pinning, femoral stem is fixedly secured in the pulp cavity of femur, such one is the anchoring that increases femoral stem and femur, at the fine motion theory, be beneficial to early stage bone and grow into, improve the wearability of material, avoid the generation of bone resorbing factor, the 2nd, directly transmit by femur and the relatively-stationary screw of femoral stem the field because near end of thighbone meets with stresses, make near end of thighbone obtain stress distribution preferably, reduce the stress concentration of femoral stem tip, avoided the bone absorption that stress shielding produced effectively.
Fig. 1 looks sketch map for master of the present utility model
Fig. 2 is a schematic side view of the present utility model
Fig. 3 is a mounting structure cross-sectional schematic of the present utility model
Fig. 4 is a mounting structure side-looking cross-sectional schematic of the present utility model
Below in conjunction with accompanying drawing this practicality newly is further described: as shown in Figure 1 and Figure 2, the femoral stem of artificial hip joint nail with lock, comprise artificial hip joint femoral shaft 1, hole at uniform two lateral direction penetratings of axis near-end of artificial hip joint femoral shaft 1, two ends are installed respectively in the hole stretch out the screw 2 of artificial hip joint femoral shaft 1,1 two through-hole spacings of artificial hip joint femoral shaft are 0.8-1.2CM, and its top through hole is 1.3-1.7CM apart from artificial hip joint femoral shaft 1 upper limb.As shown in Figure 3, Figure 4, artificial hip joint femoral shaft 1 is installed in the pulp cavity of human femur under loading 3, and settles screw 2 that artificial hip joint femoral shaft 1 is fixing with human femur under loading 3.
Claims (2)
1. the femoral stem of an artificial hip joint nail with lock, comprise artificial hip joint femoral shaft (1), it is characterized in that two ends being installed respectively in the hole stretching out the screw of artificial hip joint femoral shaft (1) (2) in the hole of uniform two lateral direction penetratings of axis near-end of artificial hip joint femoral shaft (1).
2. the femoral stem of artificial hip joint according to claim 1 nail with lock is characterized in that two through-hole spacings of artificial hip joint femoral shaft (1) are 0.8-1.2CM, and its top through hole is 1.3-1.7CM apart from artificial hip joint femoral shaft (1) upper limb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99246271 CN2389639Y (en) | 1999-09-30 | 1999-09-30 | Femoral stalk with locking screw for artificial hip joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99246271 CN2389639Y (en) | 1999-09-30 | 1999-09-30 | Femoral stalk with locking screw for artificial hip joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2389639Y true CN2389639Y (en) | 2000-08-02 |
Family
ID=34031935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99246271 Expired - Fee Related CN2389639Y (en) | 1999-09-30 | 1999-09-30 | Femoral stalk with locking screw for artificial hip joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2389639Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103598932A (en) * | 2013-10-21 | 2014-02-26 | 上海市第十人民医院 | Combined artificial femoral middle prosthesis |
| CN105232188A (en) * | 2015-11-05 | 2016-01-13 | 王鹏程 | Artificial hip joint prosthesis handle for treating periprosthetic fracture |
-
1999
- 1999-09-30 CN CN 99246271 patent/CN2389639Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103598932A (en) * | 2013-10-21 | 2014-02-26 | 上海市第十人民医院 | Combined artificial femoral middle prosthesis |
| CN103598932B (en) * | 2013-10-21 | 2016-01-20 | 上海市第十人民医院 | A kind of combined type artificial femur stage casing prosthese |
| CN105232188A (en) * | 2015-11-05 | 2016-01-13 | 王鹏程 | Artificial hip joint prosthesis handle for treating periprosthetic fracture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |