Femoral trial mold and its femoral neck trial mold

Abstract

The present invention relates to a femoral trial mold and a femoral neck trial mold. The femoral neck trial mold includes a base, a head component, a neck component, a first locking assembly, and a second locking assembly. The head component is movably connected to the base so that the head component can move in a direction closer to or away from the base. The neck component is rotatably connected to one end of the base away from the head component. The first locking assembly connects the base and the head component and is used to lock the relative positions of the base and the head component. The second locking assembly connects the base and the neck component and is used to lock the relative positions of the base and the neck component. The above-mentioned femoral neck trial mold improves the versatility, reduces the number of trial molds required for surgery, and reduces the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a femoral trial mold and a femoral neck trial mold thereof. Background Art

[0002] Total joint arthroplasty is currently the best joint arthroplasty. Total joint arthroplasty brings hope to many patients. It preserves joint function, reduces patient pain, and improves the quality of life of patients. Among them, hip arthroplasty has the best clinical effect in total joint arthroplasty.

[0003] During hip arthroplasty, a femoral neck trial mold is required to determine whether the offset and the neck-shaft angle of the hip prosthesis are appropriate. The offset refers to the perpendicular distance between the center of rotation of the femoral head and the longitudinal axis of the femoral shaft, and the neck-shaft angle refers to the angle formed between the long axis of the femoral neck and the longitudinal axis of the femoral shaft. The individual differences in femoral offset and neck-shaft angle among different patients are very large. As patients' requirements for anatomical reduction are getting higher and higher, the corresponding hip prosthesis products will become more and more refined, and the number of available neck-shaft angles and the lengths of the femoral necks will be increasing. This will lead to an excessive number of femoral neck trial molds, increasing costs. At the same time, doctors need to continuously install and disassemble the trial molds, prolonging the operation time. Summary of the Invention

[0004] Based on this, it is necessary to provide a femoral neck trial mold for the problem of how to improve the versatility of the femoral neck trial mold.

[0005] A femoral neck trial mold includes:

[0006] A base;

[0007] A head component, movably connected to the base so that the head component can move in a direction closer to or away from the base;

[0008] A neck component, rotatably connected to one end of the base away from the head component;

[0009] A first locking assembly, connecting the base and the head component, for locking the relative position between the base and the head component; and,

[0010] A second locking assembly, connecting the base and the neck component, for locking the relative position between the base and the neck component.

[0011] The above femoral neck trial mold can adjust the length of the femoral neck trial mold through the movable head component and the first locking component, and can adjust the neck-shaft angle of the femoral neck trial mold through the rotatable neck component and the second locking member. Since the femoral neck length and the neck-shaft angle are the main factors affecting the offset, the patients with different offsets can be tested by changing the length and the neck-shaft angle of the femoral neck trial mold. Compared with the traditional femoral neck trial mold that can only test one offset, the femoral neck trial mold of the present application improves the versatility, reduces the number of trial molds required for surgery, and reduces the cost.

[0012] In one embodiment, a moving hole is formed in the end face of the base close to the head component, and the neck component is provided with a mounting portion, and the mounting portion is movably arranged in the moving hole.

[0013] In one embodiment, at least two clamping grooves are arranged at intervals along the direction close to or away from the base on the mounting portion, and the first locking component includes a locking member, and the locking member is movably arranged on the base and can be embedded into any one of the clamping grooves to lock the relative positions of the base and the head component.

[0014] In one embodiment, an installation groove is formed in the base, the locking member is movably arranged in the installation groove, a locking hole communicated with the moving hole is formed in the locking member, the mounting portion is arranged in the locking hole and the moving hole, and the hole wall of the locking hole can be embedded into any one of the clamping grooves.

[0015] In one embodiment, the first locking component further includes a limiting member, a limiting hole is formed in the base along the extending direction of the moving hole, a limiting groove communicated with the limiting hole is formed in the locking member, and the limiting member is arranged in the limiting hole and the limiting groove.

[0016] In one embodiment, a rotating groove is formed in the neck component, and one end of the base close to the neck component is arranged in the rotating groove and is rotatably connected with the neck component through a rotating shaft.

[0017] In one embodiment, at least two clamping positions are arranged at intervals in the length direction of the rotating groove of the neck component, and the second locking component includes a clamping member connected with the base, and the clamping member is provided with a convex platform, and the convex platform can be embedded into any one of the clamping positions to lock the relative positions of the base and the neck component.

[0018] In one embodiment, a moving groove is formed in the clamping member, the clamping member is sleeved on the base through the moving groove, and the clamping member can move along the base in the direction close to or away from the neck component.

[0019] In one embodiment, an elastic member is further included, with two ends of the elastic member respectively connected to the base and the clamping member.

[0020] In one embodiment, a femoral head trial mold, a femoral side trial mold and the femoral neck trial mold as described above are included. The femoral head trial mold is connected to the head component, and the femoral side trial mold is connected to the neck component.

[0021] The above-mentioned femoral trial mold is provided with the aforementioned femoral neck trial mold. The femoral neck trial mold can adjust the length of the femoral neck trial mold through the movable head component and the first locking assembly, and can adjust the neck-shaft angle of the femoral neck trial mold through the rotatable neck component and the second locking member. Since the femoral neck length and the neck-shaft angle are the main factors affecting the femoral offset, different patients with different offsets can be tested by changing the length and the neck-shaft angle of a femoral neck trial mold. Compared with the traditional femoral trial mold that can only test one offset, the femoral trial mold of the present application has versatility, reduces the number of trial molds required for surgery, and lowers the cost. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a femoral neck trial mold in an embodiment;

[0023] Figure 2 It is Figure 1 the exploded view of the structural diagram of the femoral neck trial mold shown in

[0024] Figure 3 It is Figure 1 the schematic diagram of the neck component of the femoral neck trial mold shown in

[0025] Figure 4 It is Figure 3 the right view of the neck component shown in

[0026] Figure 5 It is Figure 1 the schematic diagram of the clamping member of the femoral neck trial mold shown in

[0027] Figure 6 It is Figure 5 the left view of the clamping member shown in

[0028] Description of the Reference Numerals:

[0029] 100. Femoral neck trial mold; 110. Base; 111. Moving hole; 112. Limiting hole; 113. Installation groove; 114. Second rotation hole; 120. Head component; 121. Installation part; 122. Card slot; 130. Neck component; 131. Rotation groove; 132. Positioning slot; 133. Rotation shaft; 134. First rotation hole; 140. Second locking component; 141. Positioning part; 142. Boss; 143. Activity groove; 144. Elastic part; 150. First locking component; 151. Locking part; 152. Locking hole; 153. Limiting slot; 154. Limiting part. Detailed implementation manners

[0030] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manners.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] In the present invention, the so-called "first" and "second" do not represent specific quantities and orders, but are only used for name distinction.

[0034] See Figure 1-2, embodiments of the present application provide a femoral neck trial mold 100 for determining whether the offset of a hip joint prosthesis is appropriate during hip joint replacement surgery. Specifically, a femoral neck trial mold 100 of an embodiment includes a base 110, a head member 120, a neck member 130, a first locking assembly 150, and a second locking assembly 140. Among them, the head member 120 is used to connect the femoral head trial mold, and the head member 120 is movably connected to the base 110. For example, the head member 120 is telescopically arranged at one end of the base 110 so that the head member 120 can move in a direction closer to or farther from the base 110. Further, the first locking assembly 150 is connected to both the base 110 and the head member 120 at the same time. The first locking assembly 150 is used to lock the relative positions of the base 110 and the head member 120, thereby fixing the length of the femoral neck trial mold 100. The neck member 130 is used to connect the femoral side trial mold, and the neck member 130 is rotatably connected to the base 110. Thus, by rotating the neck member 130, the included angle between the base 110 and the neck member 130 can be changed, and further the neck-shaft angle of the femoral neck trial mold 100 can be changed. The second locking assembly 140 is connected to both the base 110 and the neck member 130 at the same time. The second locking assembly 140 is used to lock the relative positions of the base 110 and the neck member 130 so as to maintain a suitable included angle between the base 110 and the neck member 130.

[0035] The above femoral neck trial mold 100 can adjust the length of the femoral neck trial mold 100 through the movable head member 120 and the first locking assembly 150, and can adjust the neck-shaft angle of the femoral neck trial mold 100 through the rotatable neck member 130 and the second locking assembly 140. Since the femoral neck length and the neck-shaft angle are the main factors affecting the offset, the femoral neck trial mold 100 with different offsets can be tested by changing the length and the neck-shaft angle of the femoral neck trial mold 100. Compared with the traditional femoral neck trial mold 100 that can only test one offset, the femoral neck trial mold 100 of the present application has versatility, reduces the number of trial molds required for surgery, and reduces costs.

[0036] See Figure 2 , a moving hole 111 is provided on the end face of the base 110 close to the head member 120. Specifically, the extending direction of the moving hole 111 is consistent with the length direction of the femoral neck trial mold 100. Further, the head member 120 is provided with a mounting portion 121. The mounting portion 121 is a shaft-like structure, and the mounting portion 121 is movably arranged in the moving hole 111. Thus, through the cooperation between the mounting portion 121 and the moving hole 111, the head member 120 can move closer to or farther from the base 110 along the length direction of the femoral neck trial mold 100, thereby changing the relative position between the head member 120 and the base 110, and further changing the length of the femoral neck trial mold 100.

[0037] Further, at least two card slots 122 are spaced along the direction of approaching or departing from the base 110 on the mounting portion 121. The first locking assembly 150 includes a locking member 151. The locking member 151 is movably arranged on the base 110 and can be embedded into any one of the card slots 122. Thus, by embedding the locking member 151 into a certain card slot 122, the relative positions of the base 110 and the head member 120 can be locked. Separating the locking member 151 from the card slot 122 allows the head member 120 to be moved to change the length of the femoral neck trial mold 100.

[0038] Specifically, referring to Figure 2 , an installation groove 113 is formed in the base 110. The extending direction of the installation groove 113 is perpendicular or approximately perpendicular to the length direction of the femoral neck trial mold 100. The installation groove 113 penetrates through the base 110 and communicates with the moving hole 111. The locking member 151 is movably arranged in the installation groove 113. Specifically, the locking member 151 can remain relatively stationary with respect to the base 110 under the action of friction, but under the application of an external force, the locking member 151 can move along the installation groove 113. Further, a locking hole 152 communicating with the moving hole 111 is formed in the locking member 151. The mounting portion 121 of the head member 120 is arranged in the locking hole 152 and the moving hole 111. Thus, by moving the locking member 151 along the installation groove 113, the hole wall of the locking hole 152 can be embedded into or separated from any one of the card slots 122. Specifically, when the length of the femoral neck trial mold 100 needs to be adjusted, the locking member 151 is pressed from one side to withdraw the hole wall of the locking hole 152 from the card slot 122, then the head member 120 is moved along the length direction to the required length, and finally the locking member 151 is pressed from the other side to embed the hole wall of the locking hole 152 into the card slot 122 again to lock the length of the femoral neck trial mold 100 at this time.

[0039] Further, the first locking assembly 150 further includes a limiting member 154. A limiting hole 112 is formed in the base 110 along the extending direction of the moving hole. A limiting groove 153 communicating with the limiting hole 112 is formed in the locking member 151. The limiting member 154 is arranged in the limiting hole 112 and the limiting groove 153. Thus, the moving range of the locking member 151 is limited within the width range of the limiting groove 153, that is, the moving distance of the locking member 151 along the installation groove 113 is limited by the width of the limiting groove 153 and will not escape from the installation groove 113.

[0040] Referring to Figure 3 and Figure 4, a rotation groove 131 is formed on the end face of the neck member 130 close to the base 110. One end of the base 110 close to the neck member 130 is disposed in the rotation groove 131 and is rotatably connected to the neck member 130 through a rotating shaft 133. Specifically, the neck member 130 is provided with a first rotation hole 134 communicating with the rotation groove 131. One end of the base 110 close to the neck member 130 is provided with a second rotation hole 114, and the first rotation hole 134 communicates with the second rotation hole 114. The rotating shaft 133 is inserted into the first rotation hole 134 and the second rotation hole 114 so that the base 110 and the neck member 130 can rotate relative to each other, thereby rotating the neck member 130 to change the included angle between the base 110 and the neck member 130, and further changing the neck-shaft angle of the femoral neck trial mold 100.

[0041] Continue to refer to Figure 3 , at least two clamping grooves 132 are spaced apart in the length direction of the rotation groove 131 of the neck member 130. As Figure 3 and Figure 4 shown, clamping grooves 132 are provided on both sides of the rotation groove 131, and the number of clamping grooves 132 on each side is at least two. The number of clamping grooves 132 corresponds to the adjustable gears of the neck-shaft angle. For example, Figure 3 as shown in Figure 2 , Figure 5 and Figure 6 shown, three clamping grooves 132 are provided on both sides of the rotation groove 131, so the femoral neck trial mold 100 has three different neck-shaft angle gears. Further, refer to

[0042] Further, the clamping member 141 is provided with an activity slot 143 penetrating itself. The clamping member 141 is sleeved on the base 110 through the activity slot 143. And the activity slot 143 communicates with the rotation slot 131 of the neck member 130. One end of the base 110 passes through the activity slot 143 and is inserted into the rotation slot 131. The clamping member 141 can move along the base 110 in a direction close to or away from the neck member 130, so as to embed the boss 142 into the clamping slot 132 to lock the angle between the base 110 and the neck member 130, or to disengage the boss 142 from the clamping slot 132 to adjust the angle between the base 110 and the neck member 130. Further, the femoral neck trial mold 100 further includes an elastic member 144. Two ends of the elastic member 144 are respectively connected to the base 110 and the clamping member 141. Thus, after adjusting the neck member 130 and the base 110 to a proper angle, the elastic force of the elastic member 144 is used to automatically reset the clamping member 141, and further the boss 142 is automatically embedded and fixed in the clamping slot 132. In one embodiment, the elastic member 144 is a spring. The spring is sleeved on the base 110 and two ends are respectively connected to the base 110 and the clamping member 141.

[0043] Specifically, when it is necessary to adjust the angle between the neck member 130 and the base 110, first move the clamping member 141 in a direction away from the neck member 130 to separate the boss 142 from the clamping slot 132. At this time, the elastic member 144 is compressed. Rotate the neck member 130 to change the neck-shaft angle. Finally, embed the boss 142 into the clamping slot 132 corresponding to the current neck-shaft angle. At this time, the elastic member 144 resets and fixes the boss 142 in the clamping slot 132.

[0044] Further, on the other hand, the present application also provides a femoral trial mold. Specifically, the femoral trial mold in one embodiment includes a femoral head trial mold, a femoral side trial mold, and the femoral neck trial mold 100 in any of the foregoing embodiments. Wherein the femoral head trial mold is connected to the head member 120, and the femoral side trial mold is connected to the neck member 130.

[0045] The above-mentioned femoral trial mold is provided with the foregoing femoral neck trial mold 100. The femoral neck trial mold 100 can adjust the length of the femoral neck trial mold 100 through the movable head member 120 and the first locking assembly 150, and can adjust the neck-shaft angle of the femoral neck trial mold 100 through the rotatable neck member 130 and the second locking assembly 140. Since the femoral neck length and the neck-shaft angle are the main factors affecting the femoral offset, different patients with different offsets can be tested by changing the length and the neck-shaft angle of a femoral neck trial mold 100. Compared with the traditional femoral trial mold that can only test one offset, the femoral trial mold of the present application has versatility, reduces the number of trial molds required for surgery, and reduces the cost.

[0046] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0047] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A femoral neck trial mold, characterized in that, Comprising: A base; A head member, movably connected to the base so that the head member can move towards or away from the base; A neck member, rotatably connected to one end of the base away from the head member; A first locking assembly, connecting the base and the head member for locking the relative positions of the base and the head member; And, A second locking assembly, connecting the base and the neck member for locking the relative positions between the base and the neck member; A moving hole is formed on the end face of the base close to the head member, the head member is provided with a mounting portion, and the mounting portion is movably arranged in the moving hole; at least two clamping grooves are arranged at intervals along the direction of approaching or departing from the base on the mounting portion, the first locking assembly includes a locking member, the locking member is movably arranged on the base and can be embedded into any one of the clamping grooves to lock the relative positions of the base and the head member; A rotating groove is formed on the neck member, one end of the base close to the neck member is arranged in the rotating groove and is rotatably connected to the neck member through a rotating shaft; at least two positioning grooves are arranged at intervals in the length direction of the rotating groove on the neck member, the second locking assembly includes a positioning member connected to the base, the positioning member is provided with a boss, and the boss can be embedded into any one of the positioning grooves to lock the relative positions of the base and the neck member.

2. The femoral neck trial mold according to claim 1, wherein An installation groove is formed on the base, the locking member is movably arranged in the installation groove, a locking hole communicating with the moving hole is formed on the locking member, the mounting portion is arranged in the locking hole and the moving hole, and the hole wall of the locking hole can be embedded into any one of the clamping grooves.

3. The femoral neck trial mold according to claim 1, characterized in that, The first locking assembly further includes a limiting member, a limiting hole is formed on the base along the extending direction of the moving hole, a limiting groove communicating with the limiting hole is formed on the locking member, and the limiting member is arranged in the limiting hole and the limiting groove.

4. The femoral neck trial mold according to claim 1, characterized in that, The positioning member is provided with a moving groove, the positioning member is sleeved on the base through the moving groove, and the positioning member can move along the base towards or away from the neck member.

5. The femoral neck trial mold according to claim 4, wherein, The femoral neck trial mold further includes an elastic member, and two ends of the elastic member are respectively connected to the base and the positioning member.

6. A femoral trial mold, characterized in that, Comprising a femoral head trial mold, a femoral side trial mold and the femoral neck trial mold according to any one of the above claims 1-5, the femoral head trial mold is connected to the head member, and the femoral side trial mold is connected to the neck member.

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