阅读说明：本技术 一种骨螺钉与接骨板配合尺寸的检测装置及检测方法 (Detection device and detection method for fit size of bone screw and bone fracture plate ) 是由 陈文涛 朱益清 潘辉 尹华 于 2021-10-18 设计创作，主要内容包括：本发明涉及一种骨螺钉与接骨板配合尺寸的检测装置及检测方法,包括测套、高度规和标准杆,测套的内部设置有位于其轴向的通孔；高度规的测量杆能够从测套的上端装入通孔内；标准杆能够从测套的下端装入通孔内；骨螺钉与接骨板的配合尺寸检测时,取出标准杆,骨螺钉可从测套的下端装入通孔中。本发明通用性好,使用方便,能够快速实现骨螺钉与接骨板配合尺寸的测量,提高了螺钉孔的测试效率。(The invention relates to a detection device and a detection method for the fit size of a bone screw and a bone fracture plate, wherein the detection device comprises a detection sleeve, a height gauge and a standard rod, wherein a through hole positioned in the axial direction of the detection sleeve is arranged in the detection sleeve; the measuring rod of the height gauge can be installed into the through hole from the upper end of the measuring sleeve; the standard rod can be arranged in the through hole from the lower end of the measuring sleeve; when the matching size of the bone screw and the bone fracture plate is detected, the standard rod is taken out, and the bone screw can be installed in the through hole from the lower end of the measuring sleeve. The bone screw and bone fracture plate matching size measuring device is good in universality and convenient to use, can quickly measure the matching size of the bone screw and the bone fracture plate, and improves the testing efficiency of the screw hole.)

1. A detection device for the fit size of a bone screw and a bone fracture plate is characterized by comprising

The measuring sleeve (1) is internally provided with a through hole (4) positioned in the axial direction;

a height gauge (2) with a measuring rod (21) which can be inserted into the through hole (4) from the upper end of the measuring sleeve (1);

a standard rod (3) which can be inserted into the through hole (4) from the lower end of the measuring sleeve (1);

when the matching size of the bone screw (5) and the bone fracture plate (6) is detected, the standard rod (3) is taken out, and the bone screw (5) can be installed in the through hole (4) from the lower end of the measuring sleeve (1).

2. The bone screw and bone plate fit size detection device according to claim 1, wherein the through hole (4) comprises a main core hole (41), a counter bore (42) at the top of the main core hole (41), and a tapered hole (43) at the lower end of the main core hole (41).

3. The bone screw and bone plate fit dimension sensing device of claim 2, wherein the counterbore (42) has an inner diameter greater than an inner diameter of the main core hole (41).

4. The bone screw and bone plate fit dimension detection device according to claim 2, wherein one side of the counter bore (42) is provided with a locking screw hole (7), and a locking screw (8) is installed in the locking screw hole (7).

5. The bone screw and bone plate cooperation size detection device according to claim 2, wherein the lower end of the measuring sleeve (1) is of a conical structure, the outer diameter of the lower end of the measuring sleeve (1) is smaller than that of the top end of the measuring sleeve, and the inner diameter of the bottom of the conical hole (43) is larger than that of the main core hole (41).

6. The bone screw and bone plate cooperation size detection device according to claim 2, wherein the bone screw (5) has a shank outer diameter smaller than an inner diameter of a lower end of the tapered hole (43).

7. The bone screw and bone plate cooperation size detection device according to claim 6, wherein the difference between the outer diameter of the shank of the bone screw (5) and the inner diameter of the lower end of the tapered hole (43) is in the range of 2-5 mm.

8. The bone screw and bone plate cooperation size detection device according to claim 1, wherein the standard rod (3) comprises a straight rod body (31), and a base (32) arranged at the lower end of the straight rod body (31), and the outer diameter of the base (32) is larger than that of the lower end of the measuring sleeve (1).

9. The bone screw and bone plate fit detection device according to claim 8, characterized in that the length of the bone screw (5) is equal to the length of the straight shank (31) of the standard shank (3).

10. A method for testing a device for testing the fit of a bone screw to a bone plate according to any one of claims 1 to 9, comprising the steps of:

the method comprises the following steps: setting the value: determining a set size range of the standard part bone screw (5) matched with a screw hole on a bone fracture plate (6), and selecting a measuring sleeve (1) and a standard rod (3) according to the standard part bone screw (5);

step two: zero setting: the standard rod (3) is installed into the through hole (4) from the lower end of the measuring sleeve (1), the measuring rod (21) of the height gauge (2) is installed into the through hole (4) from the upper end of the measuring sleeve (1), and the numerical value of the height gauge (2) is adjusted to be zero;

step three: locking: fixing the position of the height gauge (2);

step four: and (3) detection: taking out the standard rod (3), installing the end, where the nail body of the bone screw (5) is arranged, assembled with the bone fracture plate (6) into the through hole (4) from the lower end of the measuring sleeve (1) until the lower end of the measuring sleeve (1) is abutted against the bone fracture plate (6), and obtaining the actual fit size value through the height gauge (2);

step five: and (3) judging: if the actual matching size value is within the set size range, the screw hole on the bone fracture plate (6) is qualified; if the actual fitting size value is lower than or exceeds the set size range, the screw hole on the bone plate (6) is unqualified.

Technical Field

The invention belongs to the technical field of orthopedic medical instruments, and particularly relates to a detection device and a detection method for the fit size of a bone screw and a bone fracture plate.

Background

The bone screws currently used clinically are used in conjunction with bone plates, i.e., the threads on the head of the bone screw engage the threads of the screw hole in the bone plate to effect locking of the nail and plate. And both are at the in-process of locking, if the bone screw is loaded into too deeply, lead to the nail tail of bone screw to wear out from the skeleton easily, if pack into too shallowly, not only influence the cooperation effect, lead to fracture department fixed effect poor, when being used for the human body moreover, too high pin fin notch can cause the soft tissue to irritate, brings the secondary injury for the patient.

In the prior art, 3D modeling simulation is adopted to determine the matching range of each bone screw and each screw hole, and parameters of the corresponding screw holes on the bone fracture plate can be correspondingly changed due to different parameters of the bone screws such as diameters and the like, so that each hole needs to be simulated respectively, the process is complicated, the universality is poor, and the screw hole testing efficiency is directly influenced.

Disclosure of Invention

The invention aims to provide a detection device and a detection method for the fit size of a bone screw and a bone plate, and aims to solve the problem that the detection process of the fit size of the bone screw and the bone plate is complicated.

The invention discloses a detection device for the fit size of a bone screw and a bone fracture plate, which is realized by the following steps:

a detection device for the fit size of a bone screw and a bone fracture plate comprises

The measuring sleeve is internally provided with a through hole positioned in the axial direction of the measuring sleeve;

the measuring rod of the height gauge can be arranged in the through hole from the upper end of the measuring sleeve;

a standard rod which can be inserted into the through hole from the lower end of the measuring sleeve;

when the matching size of the bone screw and the bone fracture plate is detected, the standard rod is taken out, and the bone screw can be arranged in the through hole from the lower end of the measuring sleeve.

Further, the through hole comprises a main core hole, a counter bore positioned at the top of the main core hole, and a tapered hole positioned at the lower end of the main core hole.

Further, the inner diameter of the counter bore is larger than that of the main core hole.

Furthermore, one side of the counter bore is provided with a locking screw hole, and a locking screw is installed in the locking screw hole.

Furthermore, the lower end of the measuring sleeve is of a conical structure, the outer diameter of the lower end of the measuring sleeve is smaller than that of the top end of the measuring sleeve, and the inner diameter of the bottom of the conical hole is larger than that of the main core hole.

Further, the outer diameter of the nail body of the bone screw is smaller than the inner diameter of the lower end of the conical hole.

Furthermore, the difference range of the outer diameter of the nail body of the bone screw and the inner diameter of the lower end of the conical hole is 2-5 mm.

Further, the standard rod comprises a straight-section rod body and a base arranged at the lower end of the straight-section rod body, and the outer diameter of the base is larger than that of the lower end of the measuring sleeve.

Further, the length of the bone screw is equal to that of the standard straight rod body part.

Secondly, this application still provides a detection method of bone screw and bone plate cooperation size's detection device on the basis of above-mentioned bone screw and bone plate cooperation size's detection device, includes following step:

the method comprises the following steps: setting the value: determining a set size range of the standard part bone screw matched with the screw hole on the bone fracture plate, and selecting a measuring sleeve and a standard rod according to the standard part bone screw;

step two: zero setting: the standard rod is arranged in the through hole from the lower end of the measuring sleeve, the measuring rod of the height gauge is arranged in the through hole from the upper end of the measuring sleeve, and the numerical value of the height gauge is adjusted to be zero;

step three: locking: fixing the position of the height gauge;

step four: and (3) detection: taking out the standard rod, and loading the end of the nail body of the bone screw assembled with the bone fracture plate into the through hole from the lower end of the measuring sleeve until the lower end of the measuring sleeve is abutted against the bone fracture plate, and obtaining the actual fit size value through the height gauge;

step five: and (3) judging: if the actual matching size value is within the set size range, the screw hole on the bone fracture plate is qualified; if the actual fitting size value is lower than or exceeds the set size range, the screw hole on the bone fracture plate is unqualified.

After the technical scheme is adopted, the invention has the beneficial effects that:

(1) the detection device provided by the invention has a simple structure, can realize measurement of the matching size of the bone screws and the bone fracture plates with different specifications by selecting the measuring sleeves and the standard rods with different specifications, and has good universality and convenient use;

(2) the detection method provided by the invention is simple to operate, can quickly realize the measurement of the fit size of the bone screw and the bone fracture plate, and improves the testing efficiency of the screw hole.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is an exploded view of a bone screw and bone plate fit size detection device according to embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view of a bone screw and bone plate fit size detection device according to example 2 of the present invention;

FIG. 3 is a cross-sectional view of the bone screw and bone plate cooperation size detecting apparatus according to embodiment 2 of the present invention;

in the figure: the measuring sleeve comprises a measuring sleeve 1, a height gauge 2, a measuring rod 21, a measuring head 22, an installation part 23, a numerical display screen 24, a standard rod 3, a straight-section rod body 31, a base 32, a through hole 4, a main core hole 41, a counter bore 42, a tapered hole 43, a bone screw 5, a bone fracture plate 6, a locking screw hole 7 and a locking screw 8.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in figures 1-3, the detection device for the matching size of the bone screw and the bone fracture plate comprises a measuring sleeve 1, a height gauge 2 and a standard rod 3, wherein a through hole 4 positioned in the axial direction of the measuring sleeve 1 is formed in the measuring sleeve 1; the measuring rod 21 of the height gauge 2 can be installed into the through hole 4 from the upper end of the measuring sleeve 1; the standard rod 3 can be arranged in the through hole 4 from the lower end of the measuring sleeve 1; when the matching size of the bone screw 5 and the bone fracture plate 6 is detected, the standard rod 3 is taken out, and the bone screw 5 can be installed into the through hole 4 from the lower end of the measuring sleeve 1.

The detection device provided by the embodiment judges whether the screw hole on the bone plate 6 is qualified or not by measuring the matching size of the bone screw 5 and the bone plate 6, so that the bone screws 5 used in the detection device are all standard parts of the bone screws 5.

To facilitate assembly of the height gauge 2, the gauge rod 3 and the bone screw 5, the through-hole 4 includes a main core hole 41, a counter bore 42 at the top of the main core hole 41, and a tapered hole 43 at the lower end of the main core hole 41.

To facilitate the installation of the height gauge 2, the inner diameter of the counterbore 42 is larger than the inner diameter of the main core hole 41.

Specifically, the height gauge 2 includes a measuring head 22 and a measuring rod 21 mounted below the measuring head 22, a mounting portion 23 is provided between the measuring head 22 and the measuring rod 21, the measuring rod 21 extends into the main core hole 41, and the mounting portion 23 is fitted in the counter bore 42. The measuring head 22 is provided with a numerical display screen 24 for displaying the height change of the measuring rod 21 during the measuring process.

In order to fix the height gauge 2, one side of the counter bore 42 is provided with a locking screw hole 7, and a locking screw 8 is installed in the locking screw hole 7.

After the height gauge 2 is zeroed, the locking screw 8 is tightened, so that the back end of the locking screw 8 abuts against the mounting portion 23 of the height gauge 2, and the position of the height gauge 2 is fixed.

In order to reduce the contact area between the measuring sleeve 1 and the bone plate 6 in the measuring process, the lower end of the measuring sleeve 1 is of a conical structure, the outer diameter of the lower end of the measuring sleeve 1 is smaller than that of the top end of the measuring sleeve, and the inner diameter of the bottom of the conical hole 43 is larger than that of the main core hole 41.

In order to better fit the skeleton of the human body, the surface of the bone plate 6 is generally in a non-planar structure, in the embodiment, the conical structure with the larger upper part and the smaller lower part at the lower end of the measuring sleeve 1 is matched with the structure with the smaller upper part and the larger lower part of the conical hole 43, so that the lower end of the measuring sleeve 1 is in an annular structure with a smaller difference value between the inner diameter and the outer diameter, the contact area between the lower end of the measuring sleeve 1 and the bone plate 6 can be reduced in the measuring process, and the influence of the surface shape of the bone plate 6 on the measuring result is reduced.

For convenience of measurement, the outer diameter of the shank of the bone screw 5 is smaller than the inner diameter of the lower end of the tapered hole 43.

Specifically, the shank of the bone screw 5 can extend into the main core hole 41, and the end of the shank is in contact with the lower end of the measuring rod 21, so that the measurement of the fit size of the bone screw 5 and the bone plate 6 is realized.

During measurement, the lower end of the measuring sleeve 1 is required to be abutted against the bone fracture plate 6, and the surface of the bone fracture plate 6 is generally in a non-planar structure, so that the difference between the outer diameter of the nail body of the bone screw 5 and the inner diameter of the lower end of the tapered hole 43 is 2-5mm in order to ensure the measurement accuracy.

Too large or too small a range may cause deviations in the measured values due to the shape of the surface of the bone plate 6.

Preferably, the difference between the outer diameter of the shank of the bone screw 5 and the inner diameter of the lower end of the tapered hole 43 is in the range of 3 mm.

In order to conveniently zero the height gauge 2, the standard rod 3 comprises a straight rod body 31 and a base 32 arranged at the lower end of the straight rod body 31, and the outer diameter of the base 32 is larger than that of the lower end of the measuring sleeve 1.

When zeroing, the straight section body of rod 31 stretches into in the through-hole 4, supports on base 32 until surveying the lower extreme of cover 1, can set zero the setting to altitude gauge 2 this moment.

In order to be able to zero the respective bone screw 5 with the standard shank 3, the length of the bone screw 5 is equal to the length of the straight shank 31 portion of the standard shank 3.

Secondly, this implementation still provides a bone screw and bone plate cooperation size's detection method of detection device, includes the following step:

the method comprises the following steps: setting the value: the set size range for the standard bone screw 5 to fit the screw hole in the bone plate 6 is determined and the sleeve 1 and standard shank 3 are selected based on the standard bone screw 5.

Specifically, a bone plate 6 to be tested and a standard part of the bone screw 5 matched with the bone plate 6 are determined, a set size range of the bone screw 5 matched with a screw hole on the bone plate 6 is determined, a standard rod 3 with the same length as the bone screw 5 is selected, and a measuring sleeve 1 matched with the bone screw 5 and the outer diameter of the standard rod 3 is selected.

Step two: zero setting: the standard rod 3 is inserted into the through hole 4 from the lower end of the measuring sleeve 1, the measuring rod 21 of the height gauge 2 is inserted into the through hole 4 from the upper end of the measuring sleeve 1, and the value of the height gauge 2 is adjusted to be zero.

Specifically, the straight section rod body 31 of the standard rod 3 is loaded into the through hole 4 from the lower end of the measuring sleeve 1 until the lower end of the measuring sleeve 1 is abutted to the base 32, after the height gauge 2 is assembled in place, the upper end of the standard rod 3 is contacted with the lower end of the measuring rod 21, and the numerical value of the height gauge 2 is adjusted to be zero at the moment.

Step three: locking: fixing the position of the height gauge 2;

at this time, the locking screw 8 is tightened to fix the position of the height gauge 2.

Step four: and (3) detection: taking out the standard rod 3, installing the end of the bone screw 5 assembled with the bone fracture plate 6, where the nail body is located, into the through hole 4 from the lower end of the measuring sleeve 1 until the lower end of the measuring sleeve 1 abuts against the bone fracture plate 6, and obtaining the actual fit size value through the height gauge 2;

specifically, the bone screw 5 and the bone plate 6 are assembled in place, the side of the nail body of the bone screw 5 is placed upwards, after the standard rod 3 is taken down, the nail body of the bone screw 5 is installed into the through hole 4 from the lower end of the measuring sleeve 1 until the lower end of the measuring sleeve 1 abuts against the surface of the bone plate 6, at the moment, the lower end of the measuring rod 21 is in contact with the end part of the nail body, and the numerical value displayed by the numerical value display screen 24 of the height gauge 2 is the actual matching size of the bone screw 5 and the bone plate 6.

Step five: and (3) judging: if the actual fitting size value is within the set size range, the screw hole on the bone fracture plate 6 is qualified; if the actual fitting size value is lower than or exceeds the set size range, the screw holes in the bone plate 6 are not qualified.

For example, the set size range is 1.5-2.8mm, and if the actual fit size is 1.3, it indicates that the bone screw 5 is screwed too deep and the screw hole is not qualified; if the actual matching size is 2mm, the screw hole is qualified; if the actual fit dimension is 3.2mm, it indicates that the screw 5 is screwed too shallow and the screw hole is rejected.

The invention can pertinently select the standard rod 3 and the measuring sleeve 1 according to the specification of the bone screw 5 matched with the screw hole on the bone fracture plate 6, thereby realizing the test of the screw holes with different sizes, and having simple and convenient operation and good universality.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.