CN202619829U - Femoral neck interlocking intramedullary fixing device - Google Patents
Femoral neck interlocking intramedullary fixing device Download PDFInfo
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- CN202619829U CN202619829U CN 201120481951 CN201120481951U CN202619829U CN 202619829 U CN202619829 U CN 202619829U CN 201120481951 CN201120481951 CN 201120481951 CN 201120481951 U CN201120481951 U CN 201120481951U CN 202619829 U CN202619829 U CN 202619829U
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- neck
- steel plate
- nail
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Abstract
The utility model discloses a femoral neck interlocking intramedullary fixing device comprising a steel plate disposed on an outer side of a femur. The steel plate is fixedly disposed on an upper end bone of the femur by three locking holes in a lower end of the steel plate and locking nails. The steel plate is connected with an anti-rotation nail, which is connected with an interlocking nail implanted in the femur. The femoral neck interlocking intramedullary fixing device has advantages of simple operation, and abilities of solving the problem of the loosening of the connection between the head-neck part of the femur and the nails after the femoral trochanter fracture operation, enhancing the intramedullary fixing of the reduction of fracture after the operation, reducing the risks of operation failure caused by the loosening of devices, and providing more options of operation ways for treating the femur trochanter and fracture of the upper segment of the femur.
Description
Technical field
This utility model relates to a kind of inner fixing device of intertrochanteric fracture of the femur.
Technical background
Intertrochanteric fracture of the femur is a kind ofly to be common in older crowd and to suffer from classification of fracture, the aging in China along with population, and the sickness rate of annual femur intertrochanteric fracture all rises to some extent in recent years; Expectant treatment has many complication, and after 20th century 60, internal fixation treatment becomes the first-selection treatment of intertrochanteric fracture treatment gradually.The purpose of operation internal fixation is to make fracture obtain well to reset, and fixedly secures, so that the patient bears a heavy burden from bed row limb activity and part in early days, prevents the various complication of bringing because of long-term bed.Following several kinds of internal fixation modes are arranged at present
Many pieces of hollow internal fixation, many pieces of hollow screws are del and distribute, the most following 1 piece near bigelow's septum.But this method internal fixation intensity is low, anti-capital rotation, and shearing force is all not enough, just can be used for Evans I a, I b type stable fracture, but for other classification of fracture, because fixing unreliable when being regarded as taboo.
Dynamic hip screw (DHS).This system is connected with sleeve steel plate and forcing screw with 1 thick wide screw thread lag screw, reset and fracture healing process in two fracture ends are drawn close, produce the static(al) pressurization, to the pressurization that can gain impetus along intertrochanteric fracture.But this system exists unstable relatively, and a little less than the anti-rotation performance, being used for sufferers of osteoporosis face has certain lag screw to cut out rate;
Power condyle screw (95 ° of DCS).The similar cantilever beam system of DCS, negative G at first is added on the galianconism of steel plate during heavy burden, and then is dispersed on each screw.This system has certain anti-rotational force than the above-mentioned type, but but this system still exist near section neck of femur particularly sufferers of osteoporosis face have certain lag screw to cut out rate;
Gamma nail Arson Grossc has designed the Gamma nail, has shortened the arm of force, and flexural stress is strong, the accordance with physiology heavy burden line of force, and its constant intensity is high than DHS.The Gamma nail increased the compressive stress that adds of bigelow's septum when fracture was unstable.Its shortcoming is to be single lag screw in the femur head and neck, and anti-turning effort is not enough, and lag screw can pass the not good coxa vara deformity that causes of femoral head or lag screw position.
PFN (PFN) 1996, to some deficiency of Gamma nail make corresponding improvement and released PFN (proximal femoral nail, PFN).Because the patient constantly adjusts the position of nail at intra-operative, make operation technique comparatively complicated, and certain mortality is arranged; Also having postoperative lag screw to occur in addition cuts neck of femur, lag screw or prevents revolving " Z " effect that screw withdraws from.
PFN-A improves to the drawback PFN of PFN, releases new generation product PFN-A.PFN-A anti-revolves the screw top end and have 6 ° the radian that turns up can make it anti-ly revolve nail and insert smoothly, and PFN-A replaces 2 pieces of screws with 1 piece of screw blade; Anti-rotational stabilization is similar with 2 pieces of screws with anti-interior talipes varus ability; Automatically accomplish anti-rotational locking through outside otch; Shortcoming is to need reduction with good in the pre-operative surgical, otherwise is prone to cause the separation of fracture site when squeezing into screw blade; The near end of thighbone screw blade squeezed into dark after difficulty extract; Be prone to cause refracture for osteoporosis corrective surgery operation process, certain screw cutting neck of femur also can be arranged after operation.
Comprehensive above-mentioned internal fixation mode is totally said, the fixed form of present high praise can form the inner support effect of certain limit, thus can reasonable solution inside-fixture and femur upper segment between the problem of relative displacement.For intertrochanteric fracture, said apparatus enough increases the anti-rotation of the folding end far away of tuberosity fracture, and the anti-powerful stress that bears a heavy burden and produce.But the support that these fixed systems form is limited in scope; The near-end (being neck of femur and femoral head) that can not contain fracture; Can not avoid screw to the direct shearing power of the nearly folding end of bone and extract active force; Because the patient of tuberosity part fracture generally is osteoporotic gerontal patient; Thereby their sclerotin controls strength for screw and weakens, and finally causes the phenomenon of operative failure like this with regard to loosening between incidence that femur inevitably occurs and the screw even the cutting out nearly incidence of screw.
Summary of the invention
In order to overcome the above-mentioned shortcoming of prior art, this utility model provides a kind of near end of thighbone inner fixing device that can avoid screw that the incidence of femur is produced direct shearing power and extract active force.
The technical scheme that this utility model adopts is:
Interlocking inner fixing device in the neck of femur marrow; Comprise the steel plate that is arranged on lateral side of femur; One piece of anti-screw and one piece of self-locking nail composition of revolving; Described steel plate is fixed on the proximal femur bone through three lock screw in lower end, and described steel plate upper end is established and is connected with one and anti-ly revolves screw hole, and this Kong Yufang revolves screw and is connected; It is described that anti-to revolve under screw and the implanted unit bone be that neck of femur is connected with the self-locking nail of femoral head junction; The described anti-screw that revolves is by under outside (human body), inwardly going up direction, the consistent femur that penetrates with the longitudinal axis of neck of femur under lateral side of femur, the femoral bone tuberosity; And pass through fracture line and get into femoral head; Described self-locking nail is by the neck of femur junction, the mid point of neck of femur transverse diameter, by (human body) preceding backward directions implanted femur neck.
Further, describedly anti-revolve screw and pass the inclined hole on the self-locking nail at neck of femur, described anti-revolving between screw and the inclined hole inwall meshed through mechanical whorl, and can produce and be press-fitted each other, prevents to become flexible.
Further; Described steel plate is provided with and the described anti-parallel anti-stress nail of screw that revolves; Described anti-stress nail passes the lateral side of femur cortical bone, by inwardly going up direction, the consistent neck of femur that penetrates down from the outer of human body under the femoral bone tuberosity with the longitudinal axis of neck of femur, and pass through fracture face entering femoral head.
Further again, described steel plate is provided with anti-screw hole, the nail cover of revolving, and the described anti-afterbody that revolves screw is inserted in the described steel plate nail cover, and the described anti-screw that revolves is connected through one piece of pressurization sliding screw with the anti-screw hole that revolves of steel plate; Described pressurization sliding screw passes the described anti-screw hole that revolves and prevents that with described revolving screw is fixed on the described steel plate; The screw thread of the nail front end outer wall of described pressurization sliding screw and said anti-female thread engagement of revolving on the screw afterbody endoporus, the anti-female thread engagement of revolving screw hole of screw thread on the nail back segment outer wall of described pressurization sliding screw and described steel plate.
Further, describedly anti-revolve the screw cover and described anti-rotation nail afterbody all is hexagon.
Further; Described anti-revolve screw with described self-locking nail on the inclined hole engaged section be provided with mechanical whorl; The forward and backward tapping screw thread that all is provided with of said engaged section; The diameter of the back segment of engaged section nail is greater than the diameter of engaged section, makes anti-screw and the self-locking nail of revolving can produce and be press-fitted each other, prevents to become flexible after tightening.
Further, describedly anti-revolve screw and self-locking nail all is a hollow screw, being provided with can be through the pin hole of corresponding guide needle.
Further, described self-locking nail is provided with the port that connects sight.
Under the head of the described self-locking nail of this utility model by neck of femur, the mid point of neck of femur transverse diameter, behind forward direction, the implanted femur neck; The described anti-screw that revolves then under the qualification of sight, by lateral side of femur, ecto-entad under the femoral bone tuberosity, consistent with the longitudinal axis of neck of femur; And can accurately pass the inclined hole of self-locking nail, and two nails lock through the screw thread of inner surface and outer surface each other, like this; Anti-revolving contacting of screw and neck of femur, is not that the sclerotin through screw and neck of femur directly acts on, but through pinning and the mutual interlock generation of screw of preventing revolving screw; This design has greatly strengthened the anti-shearing force of screw and the outside withdrawal force of revolving of opposing.Prevent revolving screw and outside steel plate through the locking of pressurization sliding screw; Described steel plate is fixed on the proximal femur bone through other lock holes.Described self-locking nail is prevented revolving screw, and steel plate is connected as a single entity, and forms a spatial support.Self-locking nail is cylindric; Outer surface is provided with tapping screw thread, can get in the neck of femur near-end sclerotin, and the center is provided with and obliquely becomes 75 ° cylindrical hole with the screw longitudinal axis; And be provided with interior mechanical whorl; Revolve the screw locking through this Kong Yufang, prevent that revolving the screw outer surface is provided with tapping screw thread, the distance of screw thread is less; Anti-revolve behind the screw implant into body parallelly, be 135 ° with proximal femur with the longitudinal axis of neck of femur; Anti-revolve screw and can be divided into four sections: first section initiating terminal is sharp vertebra shape, is thereafter thinner cylindrical, about 1.5 centimetres of this section screw length overalls; Anti-second section of screw of revolving is thick slightly than first section, still be cylindrical, is provided with mechanical whorl, and length is 2.0 centimetres, and the interior rib-loop of the oblique-shaped hole of this section screw thread and described self-locking nail can be complementary, and these two pieces of screws are locked; Anti-the 3rd section on the screw that revolves increases slightly than second section, this design can make two pieces of above-mentioned screws produce and be press-fitted, and prevents to become flexible; The 3rd section still is cylindrical, and long about 3 centimetres, tapping screw thread is established on the surface, can combine closely with sclerotin, produces certain hold; Anti-the 4th section of revolving screw is hexagon, long about 1.5 centimetres, is complementary with the anti-screw cover inner face that revolves of steel plate; Its effect is that in a single day steel plate is fixed, and is stuck in the anti-anti-screw that revolves that revolves in the screw cover and just can not rotates.Operability of the present invention is simple, the more important thing is to strengthen neck of femur to anti-hold of revolving screw, avoids the anti-screw that revolves that neck of femur is produced cutting and the outside effect of extracting; This design advantage be at present all similar medical apparatus and instruments do not have, can improve the success rate of femur intertrochanteric fracture internal fixation greatly.
The beneficial effect of this utility model is embodied in: operate simple and easyly, postop fracture is disconnected to keep more stable and stronger more after resetting, and improves success rate of operation, has reduced the risk because of the loosening operative failure that produces of apparatus.
Description of drawings
Fig. 1 is this utility model user mode sketch map.
Fig. 2 is this utility model structural representation.
Fig. 3 is this utility model scheme of installation.
Fig. 4 is this utility model steel plate and the anti-screw annexation sketch map that revolves.
Fig. 5 is the anti-bolt structure sketch map that revolves of this utility model.
Fig. 6 is this utility model self-locking nail structural representation.
The specific embodiment
Referring to figs. 1 through Fig. 6; The neck of femur near-end interlocking inner fixing device of this utility model; Comprise the steel plate 1 that is arranged on lateral side of femur 10, described steel plate 1 is fixed on proximal femur bone 3 through three screw hole in lower end 13 and lock screw 2, it is characterized in that: described steel plate 1 upper end is connected with an anti-screw hole that revolves; This Kong Yufang revolves screw 9 and is connected, and describedly anti-revolve screw 9 and is connected with the self-locking nail 8 of implanted unit bone 7 junctions; Describedly anti-revolve screw 9 by lateral side of femur 10,4 times ecto-entads of femoral bone tuberosity, the consistent femur that penetrates with the longitudinal axis of neck of femur 5; And pass through the fracture face and get into femoral head 7; Described self-locking nail 8 by the head of neck of femur 5 down, the mid point of neck of femur 5 transverse diameters, by implanted femur neck 5 behind the forward direction.
Describedly anti-revolve screw 9 and pass the inclined hole 15 on the self-locking nail 8 at neck of femur 5, described anti-revolving between screw outer wall 9 and inclined hole 15 inwalls is threaded.
Described steel plate 1 is provided with the described anti-screw 9 parallel anti-stress that revolve and follows closely 6, and described anti-stress follows closely 6 by lateral side of femur 10,4 times ecto-entads of femoral bone tuberosity, the consistent femur that penetrates with the longitudinal axis of neck of femur 5, and passes through fracture face entering femoral head 7.
Described steel plate 1 is provided with anti-screw hole 11, the nail cover 12 of revolving, and the described anti-afterbody that revolves screw 9 is inserted in the described nail cover 12, and the described anti-screw 9 that revolves is connected with nail cover 12 keys; One piece of pressurization sliding screw 17 passes the described anti-screw hole 11 that revolves and prevents that with described revolving screw 9 is fixed on the described steel plate 1; Screw thread and said anti-female thread engagement of revolving on the screw hole 9 afterbody endoporus, the screw thread on the ailhead excircle of described pressurization sliding screw 17 and the described anti-female thread engagement of revolving screw hole hole 11 on one's body of the nail of described pressurization sliding screw 17.
Described key connects: described nail cover 12 prevents that with described revolving screw 9 afterbodys all is hexagon.
Described anti-revolve screw 9 with described self-locking nail 8 on inclined hole engaged section 14 be provided with mechanical whorl, the forward and backward tapping screw thread that all is provided with of described engaged section 14.
Described self-locking nail 8 is provided with the port one 6 that connects sight 18.
With reference to Fig. 3; When this utility model is installed, self-locking nail 8 is connected with sight 18, anti-revolve screw 9 afterbodys through screw thread with prevent that revolving screw driver 19 is connected; Vitro detection prevents that revolving screw 9 can pass through sight 18; The external screw thread and the female thread that get into inclined hole 15, two nails on the self-locking nail 8 mate locking fully.In the place ahead of thigh, cut a skin incision, separate soft tissue, until neck of femur 5; With the mid point of guide pin by 7 times neck of femur transverse diameters of femoral head, insert neck of femur 5 from front to back, the X line confirms that the position is good, and self-locking nail 8 is implanted locking along guide pin; Self-locking nail 8 is inserted gradually, the outside skin of outer lateral incision thigh, and subcutaneous tissue is to lateral side of femur cortex; The position of positioning needle in observation sight 18 sleeves, when positioning needle can contact following two centimetres of the intersection points with femur sidewall center line of femoral bone tuberosity just, (through rotation self-locking nail 8, making that entry point is as far as possible near this point) inserted and located; At this moment, positioning needle is led brill through sleeve, the reaming of lateral side of femur cortex through the center of self-locking nail 8; Pierce the anti-screw 9 that revolves, make the anti-screw 9 that revolves, tighten through the inclined hole 15 on the self-locking nail 8.Under the normal condition, anti-revolve the angle that screw 9 and the femur longitudinal axis are 135 degree, the nail cover 12 of steel plate 1 put anti-revolve screw after, steel plate 1 is parallel with the femur longitudinal axis, can attach fully mutually with lateral side of femur 10.
The described content of this description embodiment only is enumerating the way of realization of inventive concept; The protection domain of this utility model should not be regarded as and only limit to the concrete form that embodiment states, the protection domain of this utility model also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (8)
1. interlocking inner fixing device in the neck of femur marrow; Comprise the steel plate that is arranged on lateral side of femur; One piece of anti-screw and one piece of self-locking nail composition of revolving; Described steel plate is fixed on the proximal femur bone through three lock screw in lower end, it is characterized in that: described steel plate upper end is established and is connected with one and anti-ly revolves screw hole, and this Kong Yufang revolves screw and is connected; It is described that anti-to revolve under screw and the implanted unit bone be that neck of femur is connected with the self-locking nail of femoral head junction.
2. interlocking inner fixing device in the neck of femur marrow as claimed in claim 1; It is characterized in that: describedly anti-revolve screw and pass the inclined hole on the self-locking nail at neck of femur; Described anti-revolving between screw outer wall and the inclined hole inwall meshed through mechanical whorl, and can produce and be press-fitted each other.
3. interlocking inner fixing device in the neck of femur marrow as claimed in claim 1 is characterized in that: described steel plate is provided with and the described anti-parallel anti-stress nail of screw that revolves.
4. interlocking inner fixing device in the neck of femur marrow as claimed in claim 3; It is characterized in that: described steel plate is provided with anti-screw hole, the nail cover of revolving; The described anti-afterbody that revolves screw is inserted in the described steel plate nail cover, and the described anti-screw that revolves is connected through one piece of pressurization sliding screw with the anti-screw hole that revolves of steel plate; Described pressurization sliding screw passes the described anti-screw hole that revolves and prevents that with described revolving screw is fixed on the described steel plate; The screw thread of the nail front end outer wall of described pressurization sliding screw and said anti-female thread engagement of revolving on the screw afterbody endoporus, the anti-female thread engagement of revolving screw hole of screw thread on the nail back segment outer wall of described pressurization sliding screw and described steel plate.
5. interlocking inner fixing device in the neck of femur marrow as claimed in claim 4 is characterized in that: the described anti-screw cover that revolves prevents that with described revolving the screw afterbody all is hexagon.
6. interlocking inner fixing device in the neck of femur marrow as claimed in claim 5; It is characterized in that: described anti-revolve screw with described self-locking nail on the inclined hole engaged section be provided with mechanical whorl; The forward and backward tapping screw thread that all is provided with of described engaged section; The diameter of the back segment of engaged section nail is greater than the diameter of engaged section, makes anti-screw and the self-locking nail of revolving can produce and be press-fitted each other.
7. interlocking inner fixing device in the neck of femur marrow as claimed in claim 6 is characterized in that: describedly anti-ly revolve screw and self-locking nail all is a hollow screw, being provided with can be through the pin hole of corresponding guide needle.
8. like interlocking inner fixing device in the described neck of femur marrow of one of claim 1-7, it is characterized in that: described self-locking nail is provided with the port that connects sight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120481951 CN202619829U (en) | 2011-11-28 | 2011-11-28 | Femoral neck interlocking intramedullary fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120481951 CN202619829U (en) | 2011-11-28 | 2011-11-28 | Femoral neck interlocking intramedullary fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202619829U true CN202619829U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120481951 Expired - Fee Related CN202619829U (en) | 2011-11-28 | 2011-11-28 | Femoral neck interlocking intramedullary fixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202619829U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104146757A (en) * | 2014-07-14 | 2014-11-19 | 苏州瑞华医院有限公司 | Bone connecting device for treating femoral intertrochanteric fracture |
| CN106618719A (en) * | 2017-01-11 | 2017-05-10 | 海口市人民医院 | Hollow lag screw guide pin aiming fixator for restoration of lesser trochanter of thigh bone from rear side |
| CN108433798A (en) * | 2018-04-16 | 2018-08-24 | 无锡市第九人民医院 | A kind of intramedullary nail with locking steel plate effect |
| CN108433800A (en) * | 2018-04-16 | 2018-08-24 | 无锡市第九人民医院 | Interal fixation system in marrow |
-
2011
- 2011-11-28 CN CN 201120481951 patent/CN202619829U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104146757A (en) * | 2014-07-14 | 2014-11-19 | 苏州瑞华医院有限公司 | Bone connecting device for treating femoral intertrochanteric fracture |
| CN106618719A (en) * | 2017-01-11 | 2017-05-10 | 海口市人民医院 | Hollow lag screw guide pin aiming fixator for restoration of lesser trochanter of thigh bone from rear side |
| CN108433798A (en) * | 2018-04-16 | 2018-08-24 | 无锡市第九人民医院 | A kind of intramedullary nail with locking steel plate effect |
| CN108433800A (en) * | 2018-04-16 | 2018-08-24 | 无锡市第九人民医院 | Interal fixation system in marrow |
| CN108433798B (en) * | 2018-04-16 | 2023-12-22 | 无锡市第九人民医院 | Intramedullary nail with steel plate locking effect |
| CN108433800B (en) * | 2018-04-16 | 2024-02-13 | 无锡市第九人民医院 | Intramedullary steel plate fixing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20131128 |