Osteochondral graft holder
By setting a protruding structure on the clamp to form a triangular fit, the problem that traditional clamps are difficult to adapt to bone surfaces of different shapes and sizes is solved, and stable clamping and enhanced adaptability of osteochondral grafts are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 山西医科大学第二医院(山西医科大学第二临床医学院)
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-24
Smart Images
Figure CN224540267U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of osteocartilage allogeneic transplantation technology, specifically to an osteocartilage graft holder. Background Technology
[0002] In clinical procedures such as osteochondral allogeneic transplantation, clamps are widely used as key auxiliary instruments for grasping, fixing, and adjusting bones. However, due to the complex shape, irregular surface, and varying sizes of human bones, traditional clamps are difficult to effectively conform to bone surfaces of different shapes and sizes, which can easily lead to slippage or displacement during clamping, resulting in unstable clamping. Utility Model Content
[0003] In order to solve the problems existing in the prior art, this disclosure provides the following technical solution: This disclosure provides an osteocartilage graft holder, including a first clamping arm and a second clamping arm hinged together. The first clamping arm includes a first gripping portion and a first clamping portion located at the front end of the first gripping portion. The second clamping arm includes a second gripping portion and a second clamping portion located at the front end of the second gripping portion. The first clamping portion and the second clamping portion are configured to clamp an osteocartilage graft. The first clamping part has two spaced-apart first protrusions on the side facing the second clamping part; The second clamping part has a second protrusion on the side facing the first clamping part, and the second protrusion is configured to be positioned between two corresponding first protrusions.
[0004] In one embodiment of this disclosure, the second protrusion is configured to be positioned on the second clamping portion adjacent to one of the first protrusions.
[0005] In one embodiment of this disclosure, the orthographic projection of the second protrusion in the clamping direction partially overlaps with the orthographic projection of one of the first protrusions in the clamping direction.
[0006] In one embodiment of this disclosure, two third protrusions are provided on the first clamping portion at a position between the two first protrusions, and the size of the third protrusions is smaller than the size of the first protrusions.
[0007] In one embodiment of this disclosure, a fourth protrusion is provided on the second clamping portion at a position corresponding to the position between the two third protrusions, and the size of the fourth protrusion is smaller than the size of the second protrusion.
[0008] In one embodiment of this disclosure, the fourth protrusion is disposed on the second clamping portion at a position corresponding to the center of the two third protrusions.
[0009] In one embodiment of this disclosure, the two third protrusions are configured to be adjacent to corresponding first protrusions.
[0010] In one embodiment of this disclosure, the surfaces of the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion are arc surfaces.
[0011] In one embodiment of this disclosure, the surfaces of the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion are provided with anti-slip textures.
[0012] In one embodiment of this disclosure, the anti-slip texture is configured to extend along the extending directions of the first clamping portion and the second clamping portion on the surfaces of the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion, respectively.
[0013] The osteocartilage graft holder disclosed herein features two spaced-apart first protrusions on a first clamping portion, and correspondingly, a second protrusion is positioned on a second clamping portion opposite to the two first protrusions. When clamping a large-sized osteocartilage graft, the two first protrusions and the single second protrusion form a triangular mating structure, contacting the graft through three stable abutment points. This effectively increases the contact area and disperses pressure, significantly enhancing stability during clamping and preventing the graft from shifting or slipping during operation.
[0014] Meanwhile, two third protrusions, smaller than the first protrusions, are added between the two first protrusions of the first clamping part. On the second clamping part, a fourth protrusion, smaller than the second protrusion, is positioned in the middle opposite to the two third protrusions. This arrangement allows the clamp to be adapted to smaller osteocartilage grafts. The two third protrusions can form a matching triangular contact structure with either a single second or fourth protrusion, achieving stable clamping through three precise contact points. This protrusion structure ensures that regardless of the size of the osteocartilage graft, a three-point positioning system can be formed through the corresponding protrusion combination, structurally guaranteeing the reliability and stability of the clamping operation.
[0015] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0016] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.
[0017] Figure 1 This is a schematic diagram of the structure of an osteocartilage graft holder provided in one embodiment of the present disclosure; Figure 2 This is a front view of an osteocartilage graft holder provided in one embodiment of this disclosure.
[0018] Figures 1 to 2 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows: 1. First clamping arm; 11. First gripping part; 12. First clamping part; 2. Second clamping arm; 21. Second gripping part; 22. Second clamping part; 3. First protrusion; 4. Second protrusion; 5. Third protrusion; 6. Fourth protrusion; 7. Anti-slip texture; 8. Reset device. Detailed Implementation
[0019] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.
[0020] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.
[0021] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0022] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.
[0023] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.
[0024] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.
[0025] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.
[0026] This disclosure relates to an osteocartilage graft holder, which is used in clinical procedures such as osteocartilage allogeneic transplantation surgery to grasp, fix, or adjust the position of bones. The osteocartilage graft holder consists of a first clamping arm and a second clamping arm hinged together. A first gripping part in the first clamping arm and a second gripping part in the second clamping arm are used by the operator to manually grip and apply force to control the opening and closing state of the holder. The first clamping part located at the front end of the first gripping part and the second clamping part located at the front end of the second gripping part cooperate with each other to clamp the osteocartilage graft. The clamping surface of the first clamping part facing the second clamping part is provided with two spaced-apart first protrusions, and the clamping surface of the second clamping part facing the first clamping part is provided with one second protrusion. When the first clamping part and the second clamping part are closed, the second protrusion is positioned between the two corresponding first protrusions.
[0027] The osteocartilage graft holder disclosed herein ensures stability by providing two cooperating first protrusions and a second protrusion on opposite sides of the first and second clamping parts, thereby guaranteeing three contact points when clamping the osteocartilage graft.
[0028] For ease of understanding, please refer to the following: Figures 1 to 2 The specific structure and working principle of the osteocartilage graft holder disclosed herein will be described in detail with reference to one embodiment.
[0029] refer to Figure 1 and Figure 2 This disclosure provides a bone and cartilage graft holder, including a first clamping arm 1 and a second clamping arm 2 hinged together. The first clamping arm 1 includes a first gripping portion 11 and a first clamping portion 12 located at the front end of the first gripping portion 11. The second clamping arm 2 includes a second gripping portion 21 and a second clamping portion 22 located at the front end of the second gripping portion 21. The first clamping portion 12 and the second clamping portion 22 cooperate to clamp the bone and cartilage graft. The first gripping portion and the second gripping portion are used by the operator to manually grip and apply force to control the opening and closing state of the holder. Two spaced-apart first protrusions 3 are provided on the side of the first clamping portion 12 facing the second clamping portion 22, and a second protrusion 4 is provided on the side of the second clamping portion 22 facing the first clamping portion 12, with the second protrusion 4 positioned between the corresponding two first protrusions 3.
[0030] Specifically, the first clamping arm 1 and the second clamping arm 2 are connected to each other by a hinge shaft to form an openable clamping structure. When the clamp is in the initial state, the first clamping part 12 and the second clamping part 22 at the front end of the first clamping arm 1 and the second clamping arm 2 maintain a certain opening angle. By applying external force to the first gripping part 11, the degree of its opening angle can be changed, thereby realizing the clamping or release of the osteocartilage graft.
[0031] refer to Figure 1 and Figure 2 A reset device 8 is provided between the first gripping part 11 and the second gripping part 21. This reset device 8 is an elastic component. Under its own elastic force, after the first clamping arm 1 and the second clamping arm 2 complete the clamping operation, the reset device 8 can restore the first clamping arm 1 and the second clamping arm 2 to their initial positions, thereby improving operational efficiency and reducing the user's burden. For ease of operation, the outer sides of the first gripping part 11 and the second gripping part 21 are respectively provided with a wave-shaped structure for easy gripping. This wave-shaped structure extends along the length direction of the first gripping part 11 and the second gripping part 21, and its surface has a periodic undulation, which can better conform to the natural gripping posture of the human hand, improving grip stability and comfort. The wave-shaped structure forms four recesses on the first gripping part 11 and the second gripping part 21 respectively. When using the gripper, the operator's four fingers can fit perfectly within the four recesses, facilitating gripping and improving the user experience.
[0032] Furthermore, to enhance the stability of the clamp during clamping, this disclosure provides two first protrusions 3 spaced apart on the clamping surface of the first clamping part 12 facing the second clamping part 22. These two first protrusions 3 form two main contact points on the clamping surface. Simultaneously, a second protrusion 4 is provided on the clamping surface of the second clamping part 22 facing the first clamping part 12, corresponding to the position between the two first protrusions 3. This second protrusion 4 can precisely fit into the gap between the two first protrusions 3 when the clamp is closed, thereby achieving a precise fit between the first clamping part 12 and the second clamping part 22. When the two first protrusions 3 contact the osteocartilage graft from one side, a single second protrusion 4 provides corresponding support from the middle position on the other side. These three positions form three contact points, collectively constituting a stable triangular contact structure. Through the mutual cooperation of these three contact points, not only can the frictional force during clamping be significantly increased, thereby improving clamping stability, but the clamping force can also be evenly distributed on the osteocartilage graft, thus reducing local pressure concentration.
[0033] refer to Figure 2 In one embodiment of this disclosure, the second protrusion 4 is configured to be disposed on the second clamping portion 22 adjacent to one of the first protrusions 3.
[0034] Specifically, the two first protrusions 3 on the first clamping part 12 are spaced apart to form a relatively open clamping area. A second protrusion 4 is provided on the second clamping part 22, and during clamping operations, the second protrusion 4 is positioned between the two first protrusions 3 and close to one of them. This arrangement allows for more flexible positioning according to the shape of the object being clamped, and is particularly suitable for clamping irregularly shaped osteocartilage grafts. It creates a relatively strong clamping fulcrum in this area, helping to concentrate local force when clamping force is applied, thereby enhancing the fixation effect on the object.
[0035] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, the orthographic projection of the second protrusion 4 in the clamping direction partially overlaps with the orthographic projection of one of the first protrusions 3 in the clamping direction.
[0036] Specifically, when the clamp is closed, the orthographic projection of a single second protrusion 4 on the second clamping part 22 in the clamping direction partially overlaps with one of the two first protrusions 3 on the first clamping part 12. Thus, in the clamping state, the second protrusion 4 and its corresponding first protrusion 3 have a partial spatial intersection area, forming an asymmetrical clamping pattern. This better adapts to irregular or specifically shaped osteocartilage grafts, improving the fit and reliability of the clamping.
[0037] In addition, this layout helps to avoid slippage or slippage caused by insufficient contact area or uneven pressure distribution during clamping. By reasonably setting the position of the second protrusion 4, the transmission path of clamping force can be further optimized, and the overall stability of operation can be improved.
[0038] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, two third protrusions 5 are provided on the first clamping part 12 at a position between the two first protrusions 3, and the size of the third protrusions 5 is smaller than the size of the first protrusions 3.
[0039] Specifically, to accommodate smaller osteocartilage grafts, this disclosure provides two smaller third protrusions 5 on the first clamping part 12, positioned between the two first protrusions 3. These two third protrusions 5 are spaced apart, forming an auxiliary clamping area suitable for small osteocartilage grafts. This addresses the clamping blind spots that may occur in actual operation, especially when dealing with small, irregularly shaped osteocartilage grafts. In such cases, the conventional combination of the first protrusion 3 and the second protrusion 4 is insufficient for effective clamping. In this situation, the two third protrusions 5 form a new clamping combination with the second protrusion 4. Through this combination, the clamp can expand its applicability without altering the overall structure, meeting the clamping requirements for small osteocartilage grafts.
[0040] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, a fourth protrusion 6 is provided on the second clamping part 22 at a position corresponding to the position between the two third protrusions 5, and the size of the fourth protrusion 6 is smaller than the size of the second protrusion 4.
[0041] Specifically, to accommodate smaller osteocartilage grafts, this disclosure provides a smaller fourth protrusion 6 on the second clamping portion 22, corresponding to the position between the two third protrusions 5. When the conventional combination of the first protrusion 3 and the second protrusion 4, as well as the auxiliary combination of the third protrusion 5 and the second protrusion 4, can no longer achieve effective clamping, a new clamping combination can be formed between the two smaller third protrusions 5 and the newly added fourth protrusion 6. This combination method can create a smaller and more tightly contacted clamping area between the first clamping portion 12 and the second clamping portion 22, thereby achieving stable grasping of miniature osteocartilage grafts.
[0042] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, the fourth protrusion 6 is disposed on the second clamping part 22 at the position corresponding to the center of the two third protrusions 5.
[0043] Specifically, the fourth protrusion 6 is located at a specific position on the second clamping part 22, corresponding precisely to the gap area between the two third protrusions 5 on the first clamping part 12. This allows the first clamping part 12 and the second clamping part 22 to be accurately aligned and apply clamping force during the clamping closure process. This structure not only improves the coverage of the clamp for grafts of different sizes, but also enhances the adaptability and flexibility during the clamping process. It is especially suitable for osteochondral grafts that are small in size, fragile in structure, and difficult to be stably fixed by traditional clamping structures.
[0044] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, the two third protrusions 5 are configured to be adjacent to the corresponding first protrusions 3.
[0045] Specifically, the third protrusion 5 is adjacent to the corresponding first protrusion 3. This adjacent arrangement allows the third protrusion 5 to maintain structural continuity and functional synergy with the adjacent first protrusion 3. During clamping, when dealing with irregularly shaped or small grafts, the third protrusion 5 can act as an extension fulcrum of the first protrusion 3, participating in the distribution and transmission of clamping force, thereby improving the clamping contact area and frictional stability. At the same time, because the third protrusion 5 is located close to the first protrusion 3, it helps to reduce the clamping blind zone and prevent the clamped object from shifting or slipping within the clamping area.
[0046] Furthermore, by placing the third protrusion 5 adjacent to the corresponding first protrusion 3, the gripper's ability to switch between different gripping modes is enhanced. For example, when dealing with extremely small osteocartilage grafts, the two third protrusions 5 can form a more precise gripping combination, either alone or in combination with the fourth protrusion 6 on the second gripping part 22. When gripping larger or standard-sized grafts, the first protrusion 3 can still function as the main gripping unit.
[0047] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, the surfaces of the first protrusion 3, the second protrusion 4, the third protrusion 5, and the fourth protrusion 6 are arc surfaces.
[0048] Specifically, compared to sharp protrusions, the rounded protrusion structure can provide sufficient gripping force while minimizing scratches, indentations or other forms of damage to the surface of osteocartilage grafts, making it particularly suitable for grasping easily damaged osteocartilage grafts.
[0049] refer to Figures 1 to 2 In the two embodiments of this disclosure, the surfaces of the first protrusion 3, the second protrusion 4, the third protrusion 5, and the fourth protrusion 6 are provided with anti-slip textures 7.
[0050] Specifically, the anti-slip texture 7 is embedded in the surfaces of the first protrusion 3, the second protrusion 4, the third protrusion 5, and the fourth protrusion 6, and multiple textures are arranged in a parallel manner. The anti-slip texture 7 can effectively increase the friction between the first clamping part 12 and the second clamping part 22 and the clamped osteocartilage graft. Especially when dealing with relatively smooth osteocartilage grafts, this regularly arranged anti-slip texture 7 can effectively prevent the object from shifting or falling off during the clamping process. At the same time, since these anti-slip textures 7 are embedded and do not protrude from the surface, they enhance the friction performance without causing indentations or damage to the clamped osteocartilage graft.
[0051] Further, refer to Figures 1 to 2The anti-slip texture 7 is configured to extend along the extension directions of the first clamping part 12 and the second clamping part 22 on the surfaces of the first protrusion 3, the second protrusion 4, the third protrusion 5, and the fourth protrusion 6, respectively.
[0052] Specifically, the anti-slip texture 7 extends in the same direction as the first clamping part 12 and the second clamping part 22, which can better match the force direction of the clamping action and enhance the stability of friction during clamping. Furthermore, the anti-slip texture 7 extends onto the surfaces of the first protrusion 3, the second protrusion 4, the third protrusion 5, and the fourth protrusion 6, forming a continuous contact line on the surface of the object being clamped. Compared to irregularly distributed anti-slip structures, its contact surface is more uniform, and the friction distribution is more reasonable, which helps to improve the reliability of clamping.
[0053] The osteocartilage graft holder disclosed herein features two spaced-apart first protrusions on a first clamping portion and a second protrusion on a second clamping portion, positioned between the two first protrusions. When clamping a large-sized osteocartilage graft, the two first protrusions and the single second protrusion form a triangular mating structure, contacting the graft through three stable abutment points. This effectively increases the contact area and distributes pressure, significantly enhancing stability during clamping and preventing graft displacement or slippage during operation.
[0054] Simultaneously, two third protrusions, smaller than the first protrusions, are added between the two first protrusions of the first clamping part. On the second clamping part, a fourth protrusion, smaller than the second protrusion, is positioned midway opposite the two third protrusions. This arrangement allows the clamp to adapt to smaller osteocartilage grafts. The two third protrusions can form a matching triangular contact structure with either a single second or fourth protrusion, achieving stable clamping through three precise contact points. This protrusion structure ensures that regardless of graft size, three-point positioning can be achieved through the corresponding protrusions, structurally guaranteeing the reliability and stability of the clamping operation.
[0055] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.
Claims
1. A bone and cartilage graft holder, characterized in that, The device includes a first clamping arm (1) and a second clamping arm (2) hinged together. The first clamping arm (1) includes a first gripping portion (11) and a first clamping portion (12) located at the front end of the first gripping portion (11). The second clamping arm (2) includes a second gripping portion (21) and a second clamping portion (22) located at the front end of the second gripping portion (21). The first clamping portion (12) and the second clamping portion (22) are configured to clamp osteochondral grafts. Among them, the first clamping part (12) has two spaced first protrusions (3) on the side facing the second clamping part (22); The second clamping part (22) has a second protrusion (4) on the side facing the first clamping part (12), and the second protrusion (4) is configured to be located between the two corresponding first protrusions (3).
2. The osteocartilage graft holder according to claim 1, characterized in that, The second protrusion (4) is configured to be positioned on the second clamping part (22) adjacent to one of the first protrusions (3).
3. The osteocartilage graft holder according to claim 2, characterized in that, The orthographic projection of the second protrusion (4) in the clamping direction partially overlaps with the orthographic projection of one of the first protrusions (3) in the clamping direction.
4. The osteocartilage graft holder according to claim 2, characterized in that, The first clamping part (12) is provided with two third protrusions (5) located between the two first protrusions (3), and the size of the third protrusions (5) is smaller than the size of the first protrusions (3).
5. The osteocartilage graft holder according to claim 4, characterized in that, A fourth protrusion (6) is provided on the second clamping part (22) at a position between the two third protrusions (5), and the size of the fourth protrusion (6) is smaller than the size of the second protrusion (4).
6. The osteocartilage graft holder according to claim 5, characterized in that, The fourth protrusion (6) is positioned on the second clamping part (22) at the center of the two third protrusions (5).
7. The osteocartilage graft holder according to claim 4, characterized in that, The two third protrusions (5) are configured to be adjacent to the corresponding first protrusions (3), respectively.
8. The osteocartilage graft holder according to claim 4, characterized in that, The surfaces of the first protrusion (3), the second protrusion (4), the third protrusion (5), and the fourth protrusion (6) are arc surfaces.
9. The osteocartilage graft holder according to claim 8, characterized in that, The surfaces of the first protrusion (3), the second protrusion (4), the third protrusion (5), and the fourth protrusion (6) are provided with anti-slip textures (7).
10. The osteocartilage graft holder according to claim 9, characterized in that, The anti-slip texture (7) is configured to extend along the extension directions of the first clamping part (12) and the second clamping part (22) on the surfaces of the first protrusion (3), the second protrusion (4), the third protrusion (5), and the fourth protrusion (6), respectively.