CN211962131U

CN211962131U - Universal femur external rotation osteotomy adjusting device

Info

Publication number: CN211962131U
Application number: CN202020151937.XU
Authority: CN
Inventors: 彭慧明; 陈曦; 钱文伟; 翁习生; 边焱焱
Original assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Current assignee: Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Priority date: 2020-02-04
Filing date: 2020-02-04
Publication date: 2020-11-20
Anticipated expiration: 2030-02-04

Abstract

The utility model discloses a general type thighbone external rotation cuts bone adjusting device, including platelike adjusting device body, a pair of echelonment adjustment through-hole has been seted up on the face of adjusting device body, it is a pair of adjustment through-hole takes on parallel arrangement, and every adjustment through-hole includes horizontal through-hole portion and vertical through-hole portion, horizontal through-hole portion perpendicular to vertical through-hole portion, it is a pair of the corresponding vertical through-hole portion parallel arrangement of adjustment through-hole, corresponding vertical through-hole portion parallel arrangement. The utility model discloses can realize cutting the bone to thighbone front and back condyle and carry out 1-3mm and interior external rotation 1-2 accurate adjustment on same adjusting device, be favorable to the accurate of false body to lay, increase the convenience of operation, improve patient's postoperative comfort level.

Description

Universal femur external rotation osteotomy adjusting device

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to general type thighbone external rotation cuts bone adjusting device.

Background

Artificial knee replacement (total knee arthroplasty TKA) is currently widely used as a very successful means for treating end-stage knee joint disease maturation. The long-term life of knee prostheses relies on the degree of accuracy of prosthesis installation, which relies on accurate intraoperative osteotomy. The clinical measurement osteotomy method is adopted to carry out the osteotomy of the anterior and posterior condyles of the femur (generally, the osteotomy amount of the anterior and posterior condyles is determined according to the size of the anterior and posterior condyles, and the external rotation is determined by referring to a universal condyle line, generally 3-5 degrees); the osteotomy method accurately depends on the experience judgment of an operator in the operation, and has poor repeatability; if the anterior condyle is excessively cut, the anterior femoral condyle 'notch' is caused, the fracture risk of the distal femur is increased, and the flexion gap is tense; while a reduction in the anterior condyle osteotomy increases the posterior condyle osteotomy volume, resulting in unstable flexion gap; it is reported that the external rotation of the distal femur of a Chinese patient is 3 degrees larger than that of a western white patient, and more errors can be generated for the patient with serious deformity of the knee joint, and if the external rotation is insufficient or too large in the operation, the imbalance of the flexion gap can be caused; once this happens, the adjustment of the osteotomy is often dependent on the bare-handed adjustment of the operator, with poor accuracy and repeatability.

Disclosure of Invention

An object of the utility model is to provide a general type thighbone cuts bone adjusting device outward, can realize cutting the bone to the thighbone front and back condyle and carry out the accurate adjustment of 1mm and interior external rotation 2 on same adjusting device, is favorable to the accurate of false body to be laid, increases the convenience of operation, improves patient postoperative comfort level.

An aspect of the utility model provides a general type thighbone external rotation cuts bone adjusting device, including platelike adjusting device body, a pair of echelonment adjustment through-hole has been seted up on the face of adjusting device body, it is a pair of adjustment through-hole parallel arrangement, every adjustment through-hole include horizontal through-hole portion and vertical through-hole portion, horizontal through-hole portion perpendicular to vertical through-hole portion, it is a pair of the corresponding horizontal through-hole portion setting of adjustment through-hole is on same straight line, corresponding vertical through-hole portion parallel arrangement.

The adjusting through holes comprise three steps or four steps or five steps, and the preferable three steps are Z-like.

Preferably, the width A of the transverse through hole part is 10mm, and the height B of the longitudinal through hole part is 2-4 mm.

Preferably, the height of the transverse through hole part is 4-6mm, and other ranges such as 3-8mm can be adjusted according to needs, and the height is the same as the width of the longitudinal through hole part.

Preferably, the thickness of the adjusting device body is 20-40 mm.

Preferably, the distance C between a pair of the adjusting through holes is 5-10 mm.

The above-mentioned universal external rotation femoral osteotomy adjusting device is preferably made of a transparent material.

Advantageous effects

The utility model provides a bone adjusting device is cut to general type thighbone outward turning, can the adaptation cut the bone ware of the different models of different producers commonly used in the present hospital, can finely tune on the standard technology according to patient's knee joint characteristic, the realization is cut the bone to the thighbone front and back condyle and is carried out 1-3mm and interior external 1-2 accurate adjustment, improve accurate nature and stability after the false body is implanted, and restore knee joint anatomy and kinematics characteristic under the patient's physiological state more effectively, thereby reduce because the false body matches badly and fixes the too early not hard up that leads to unreasonably.

Drawings

FIG. 1 is a front view of the adjusting device for external rotation osteotomy of femur of the present invention;

FIG. 2 is a rear view of the femoral external rotation osteotomy adjustment device of the present invention;

FIG. 3 is a left side view of the femoral external rotation osteotomy adjustment device of the present invention;

FIG. 4 is a top view of the adjusting device for external rotation osteotomy of femur of the present invention;

fig. 5 is a schematic view of the femoral external rotation osteotomy adjusting device of the present invention.

The reference numbers are as follows:

an adjusting device body 1, adjusting through

holes

11 and 12,

a first stepped transverse through hole portion 111, a first stepped longitudinal through hole portion 112, a second stepped transverse through hole portion 113, a second stepped longitudinal through hole portion 114, a third stepped transverse through hole portion 115 of the adjustment through hole 11;

the first stepped transverse through hole portion 121, the first stepped longitudinal through hole portion 122, the second stepped transverse through hole portion 123, the second stepped longitudinal through hole portion 124, and the third stepped transverse through hole portion 125 of the adjustment through hole 12.

Detailed Description

The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

Referring to fig. 1 to 5, the present embodiment provides a universal femur external rotation osteotomy adjusting device, including a plate-shaped adjusting device body 1, a pair of stepped adjusting through

holes

11, 12 are formed on a plate surface of the adjusting device body 1, the pair of adjusting through

holes

11, 12 are arranged in parallel side by side, the adjusting through hole 11 includes a transverse through hole portion and a longitudinal through hole portion, the adjusting through hole 12 includes a transverse through hole portion and a longitudinal through hole portion, the transverse through hole portion is perpendicular to the longitudinal through hole portion, corresponding transverse through hole portions of the pair of adjusting through

holes

11, 12 are arranged on the same straight line, and corresponding longitudinal through hole portions of the pair of adjusting through

holes

11, 12 are arranged in parallel. The present embodiment is exemplified by a step.

The pair of stepped adjustment through

holes

11, 12 comprises at least two steps or three steps or four steps or five steps, preferably three steps in a Z-like shape as shown in figure 2,

for example, the adjustment through hole 11 includes a first stepped transverse through hole portion 111, a first stepped longitudinal through hole portion 112, a second stepped transverse through hole portion 113, a second stepped longitudinal through hole portion 114, and a third stepped transverse through hole portion 115; the adjustment through-hole 12 includes a first stepped transverse through-hole portion 121, a first stepped longitudinal through-hole portion 122, a second stepped transverse through-hole portion 123, a second stepped longitudinal through-hole portion 124, and a third stepped transverse through-hole portion 125.

Corresponding transverse through hole parts of the pair of adjusting through

holes

11 and 12 are arranged on the same straight line, for example, the first stepped transverse through hole part 111 of the adjusting through hole 11 and the first stepped transverse through hole part 121 of the adjusting through hole 12 are arranged on the same straight line; the first stepped longitudinal through hole portion 112 of the adjustment through hole 11 is disposed in parallel with the first stepped longitudinal through hole portion 122 of the adjustment through hole 12.

In a preferred embodiment, the width a of the transverse through

hole portions

111, 113, 115, 121, 123, 125 is 10mm and the height B of the longitudinal through

hole portions

112, 114, 122, 124 is 2-4 mm. The height of the transverse through

hole sections

111, 113, 115, 121, 123, 125 is 4-6mm and is the same as the width of the longitudinal through

hole sections

112, 114, 122, 124. The thickness of the adjusting device body 1 is 20-40 mm. The distance C between the pair of adjusting through

holes

11 and 12 is 5-10 mm.

The utility model discloses a thighbone external rotation cuts bone adjusting device service condition as follows:

1. in the artificial total knee replacement operation, the distal femur four-side osteotomy (anterior and posterior condyles and double bevels) is performed, usually, a manufacturer configures a distal osteotomy positioner, sets an outward rotation of 3-5 degrees, then uses a drill to drill or places a screw to position, then installs a fixed hole to position, and installs a four-in-one distal osteotomy device to perform the distal four-side osteotomy (anterior and posterior condyles and double bevels);

2. however, after positioning, whether the setting of the external rotation is proper or not can be evaluated, and anatomical signs (through condylar) or Gap Balancing (Gap Balancing) can be referred; if found to be improper, the process 1 needs to be repeated again conventionally, which often increases the operation time and causes positioning errors due to too close distance of the nail holes.

Can use under this condition the utility model discloses general type thighbone external rotation cuts bone adjusting device and carries out 1mm and the accurate adjustment of interior external rotation 2, increases or reduces the thighbone external rotation, reaches accurate simple and easy bone purpose of cutting.

Specifically, a measurement osteotomy method is adopted, 2 pin holes are drilled by using a distal osteotomy positioner, then a three-side osteotomy guider is placed, the three-side osteotomy guider is placed to rotate by 3-5 degrees outwards, two pins are driven into the three-side osteotomy guider to fix, a drill bit is used for punching two cylindrical holes, and then the anterior condyle and the posterior condyle are sequentially osteotomy.

Then, the universal femur external rotation osteotomy adjusting device is put into the two pins, and according to clinical experience and actual measurement effect, if external rotation is required to be adjusted for one degree, only one step needs to be adjusted, namely, the second step transverse through hole part 113 of the first adjusting through hole 11 of the pair of step-shaped adjusting through

holes

11 and 12 and the first step transverse through hole part 121 of the other adjusting through hole 12 are correspondingly and respectively adjusted with the two pins for micro adjustment; similarly, if the internal rotation is required to be adjusted once, only the first stepped transverse through hole portion 111 of the first adjusting through hole 11 and the second stepped transverse through hole portion 123 of the other adjusting through hole 12 are required to be respectively corresponding to the two pins for fine adjustment, so that the purpose of accurate and simple osteotomy is achieved; if the external rotation is required to be adjusted by two degrees, the two steps are adjusted in the same way.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The general femur external rotation osteotomy adjusting device is characterized by comprising a plate-shaped adjusting device body, wherein a pair of stepped adjusting through holes are formed in the plate surface of the adjusting device body, the adjusting through holes are arranged in parallel side by side, each adjusting through hole comprises a transverse through hole part and a longitudinal through hole part, the transverse through hole part is perpendicular to the longitudinal through hole part, the corresponding transverse through hole parts of the adjusting through holes are arranged on the same straight line, and the corresponding longitudinal through hole parts are arranged in parallel.

2. The universal femoral external rotation osteotomy adjustment device of claim 1, wherein said adjustment through-hole comprises three steps.

3. The universal femoral external rotation osteotomy adjustment device of claim 1 or 2, wherein said transverse through hole portion has a width a of 10mm and said longitudinal through hole portion has a height B of 2-4 mm.

4. The universal femoral external rotation osteotomy adjustment device of claim 1 or 2, wherein the transverse through hole portion has a height of 4-6mm and a width equal to the longitudinal through hole portion.

5. The universal external femoral resection adjustment device of claim 1 or 2, wherein the adjustment device body has a thickness of 20-40 mm.

6. The universal external femoral resection adjustment device according to claim 1 or 2, wherein the distance C between the pair of adjustment through holes is 5-10 mm.

7. The universal external femoral resection adjustment device of claim 1 or 2, wherein the universal external femoral resection adjustment device is made of a transparent material.