Assembled surgical device for repairing segmental clavicle prosthesis

Abstract

The invention discloses an assembled surgical device for repairing a segmental clavicle prosthesis, the segmental clavicle prosthesis comprises a bridging section and two connecting ends which are respectively positioned on two sides of the bridging section, when the segmental clavicle prosthesis fails, the connecting end on one side is loosened from the residual clavicle connected with the side, and when the segmental clavicle prosthesis fails, the segmental clavicle prosthesis fails to repair the segmental clavicle prosthesis. The assembled surgical device is used for reconnecting a loose clavicle segmental prosthesis and a residual clavicle, and comprises a clavicle fixing part which is of an irregular platy structure and is matched with the shape of the residual clavicle on the invalid side; the butt joint extension part is of an irregular platy structure and is matched with the shape of the connecting end on the invalid side, and one end of the butt joint extension part is connected with the clavicle fixing part; the clavicle fixing part is fixedly connected with the residual clavicle on the invalid side; and the butt joint extension part is fixedly connected with the segmental clavicle prosthesis. According to the assembled surgical device provided by the invention, the segmental clavicle prosthesis can be overhauled under the condition that the original prosthesis is reserved, so that the problems of secondary injury and the like are avoided.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and in particular to a modular surgical device for revision of clavicle segmental prosthesis. Background Art

[0002] The clavicle is an important component of the human upper limb skeleton. It is located between the neck and the shoulder. It is a slightly curved S-shaped tubular structure with slightly flattened ends. It is the only long bone that runs horizontally. Its inner side is connected to the manubrium of the sternum through the sternoclavicular joint, and its outer side is connected to the acromion of the scapula through the acromioclavicular joint, forming the basic support of the shoulder girdle. The clavicle not only supports the shoulder structure and maintains the position of the acromion, but also serves as an important channel for effectively transmitting the mechanical load from the upper limb to the trunk during various activities of the upper limb. In addition, the clavicle also serves as an anatomical barrier to protect important neurovascular structures (such as the brachial plexus, subclavian artery and vein, etc.) passing through the upper thoracic opening. Due to its superficial anatomical position, it is easily damaged by external forces and is therefore one of the more common fracture sites in clinical practice.

[0003] Segmental clavicle defect refers to a pathological state in which bone tissue of a certain anatomical segment of the clavicle is lost or surgically removed due to various pathological reasons, resulting in an interruption of anatomical continuity. Although this pathological change is not as common as a simple clavicle fracture in clinical practice, it is not uncommon under certain specific pathological backgrounds. Common causes include: fracture-related complications, bone infection (osteomyelitis), and tumor resection. Segmental clavicle defects caused by the above causes can seriously affect the normal mechanical function of the upper limbs, and even lead to partial loss of upper limb function, seriously affecting the patient's quality of life and daily activities. Therefore, structural and functional reconstruction interventions are urgently needed.

[0004] For the treatment of segmental clavicle defects, the main methods currently available clinically include bone transplant reconstruction and artificial prosthesis placement. In recent years, with the development of biomaterials and three-dimensional printing technology, metal prosthesis reconstruction has gradually become an important means of repairing segmental clavicle defects. This type of prosthesis is usually made of metal materials with good biocompatibility, high strength and corrosion resistance, such as titanium alloy and cobalt-chromium alloy, and is combined with three-dimensional imaging data to achieve individualized customized design. The prosthesis is fixed to the residual bone end with screws to form a stable mechanical connection structure, thereby restoring the continuity of the clavicle and the integrity of the shoulder girdle. Metal prostheses not only have strong initial stability, but also can avoid donor site complications to the greatest extent. They have the advantages of simple surgical operation and rapid postoperative recovery, making them an important treatment option for patients with segmental clavicle defects in clinical practice.

[0005] Although metal prostheses provide an effective solution for the reconstruction of clavicle segmental defects, their long-term stability is still affected by various factors and carries a certain risk of failure. As a crucial structure connecting the upper limb to the trunk, the clavicle prosthesis must withstand repeated shear, tensile, and compressive forces for a long period of time after surgery. This is particularly true during high-intensity exercises such as shoulder abduction and lifting, where the forces are significant. Therefore, the prosthesis faces a high level of mechanical fatigue challenges. Common prosthesis failure mechanisms include loosening of fixation or screw breakage, metal wear and osteolysis, local stress concentration, and fatigue fracture.

[0006] When the prosthesis exhibits the aforementioned symptoms of failure, it is often accompanied by clinical symptoms such as local pain, limited mobility, or functional impairment. In severe cases, this can lead to loss of upper limb support and motor function. It is worth noting that clavicle prosthesis failure typically occurs first at the connection on one side. Once this connection fails, the mechanical function it assumed is immediately lost, temporarily leaving the other end unaffected. However, the stability of the entire clavicle structure has been compromised at this point, making it unable to continue to perform its normal mechanical support and conduction functions.

[0007] Therefore, timely prosthetic revision surgery should be performed for patients who experience significant prosthetic loosening, fracture, or osteolysis. The surgical strategy includes removal of the failed prosthesis, removal of metal wear particles and pathological tissue, reconstruction of the bone bed, and replacement with a new prosthetic structure. If necessary, bone grafting or bone cement can be used to enhance fixation to improve postoperative mechanical stability and fusion potential. Postoperative functional rehabilitation and weight-bearing management are necessary to prolong the life of the prosthesis and promote full recovery of shoulder girdle function.

[0008] Existing technologies are capable of revising clavicle segmental prostheses, but they have the following clinical limitations:

[0009] 1. Existing technologies often require the complete removal of failed prostheses and their replacement with new ones. This medical concept of discarding the entire prosthesis and replacing it with a new one significantly increases medical costs and the complexity of the surgery.

[0010] 2. Existing techniques often require very large incisions during surgery to completely remove the original prosthesis, which causes significant damage to the patient.

[0011] 3. Existing techniques often require partial, forced removal of the prosthesis being reconstructed. Although segmental clavicle prostheses typically fail on only one of the two sides in contact with the bone, both sides must still be completely severed and removed. This is extremely disadvantageous for the side of the prosthesis that remains firmly fixed to the bone. In extreme cases, forced prosthesis removal can also damage and fracture the surrounding bone, causing secondary damage.

[0012] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. Summary of the Invention

[0013] The purpose of the present invention is to provide a modular surgical device for clavicle segmental prosthesis revision, so as to solve the problems of secondary damage and increased cost caused by removing the entire prosthesis during clavicle segmental prosthesis revision.

[0014] In order to achieve the above objectives, the present invention provides a modular surgical device for revision of clavicle segmental prosthesis, wherein the clavicle segmental prosthesis includes a bridging section and two connecting ends respectively located on both sides of the bridging section, the two connecting ends are respectively connected to the residual clavicles on both sides of the clavicle segmental defect, and when the clavicle segmental prosthesis fails, the connecting end on one side becomes loose from the residual clavicle connected to the side, and the modular surgical device is used to reconnect the loosened clavicle segmental prosthesis and the residual clavicle, including: a clavicle fixing part, which is an irregular plate-shaped structure and matches the shape of the residual clavicle on the failed side; a docking extension part, which is an irregular plate-shaped structure and matches the shape of the connecting end on the failed side, one end of which is connected to the clavicle fixing part; the clavicle fixing part is fitted on the residual clavicle on the failed side and is tightly connected to the residual clavicle on the failed side; the docking extension part is fitted on the connecting end on the failed side of the clavicle segmental prosthesis and is tightly connected to the clavicle segmental prosthesis.

[0015] Optionally, a plurality of bone screw holes are provided on the clavicle fixing part, and a plurality of assembly screw holes are provided on the docking extension part; the modular surgical device also includes: a plurality of bone screws, which respectively pass through the respective bone screw holes on the clavicle fixing part and are inserted into the residual clavicle on the failed side, thereby fastening the clavicle fixing part and the residual clavicle on the failed side; a plurality of assembly screws, which respectively pass through the respective assembly screw holes on the docking extension part and are inserted into the connecting end on the failed side of the clavicle segmental prosthesis, thereby fastening the docking extension part and the clavicle segmental prosthesis.

[0016] Optionally, the height of the lower surface of the docking extension portion is higher than the height of the lower surface of the clavicle fixing portion, the upper surface of the docking extension portion is raised upward, and the difference in height between the lower surface of the docking extension portion and the lower surface of the clavicle fixing portion is equal to the thickness of the connecting end of the failed side of the clavicle segmental prosthesis.

[0017] Optionally, the main body of the clavicle fixing part is a plate-like structure, and the shape of the edge matches the upper surface edge of the residual clavicle on the failed side; the edge of the clavicle fixing part refers to the three-dimensional boundary contour where the clavicle fixing part contacts the residual clavicle.

[0018] Optionally, the periphery of the edge of the clavicle fixing portion is retracted a certain distance from the periphery of the edge of the residual clavicle on the failed side.

[0019] Optionally, when failure occurs on the side of the clavicle segmental prosthesis proximal to the shoulder, the clavicle fixing portion is provided with a protruding structure at a position corresponding to the acromion end of the residual clavicle.

[0020] Optionally, one or both bone screws are inserted perpendicular to the residual clavicle surface.

[0021] Optionally, the position of each assembly screw hole and the insertion direction of each assembly screw match the position of the original screw hole at the end of the connecting end on the failed side of the clavicle segmental prosthesis. After each assembly screw passes through each assembly screw hole, it is inserted into the corresponding original screw hole at the end of the connecting end on the failed side of the clavicle segmental prosthesis.

[0022] Optionally, the thread of the assembly screw is wider and thicker than the thread of the bone screw.

[0023] Optionally, the modular surgical device is made of the same material as the clavicle segmental prosthesis.

[0024] Compared with the prior art, the modular surgical device provided by the present invention has at least the following beneficial effects in reconstructing a clavicle segmental prosthesis:

[0025] 1. The original prosthesis can be retained. This modular surgical device provides an interface for docking with the original failed prosthesis. One side of the device connects to the failed side of the original segmental prosthesis through modular screws, and the other side is fixed to the remaining clavicle bone through bone screws, thereby restoring the mechanical properties of the entire clavicle.

[0026] 2. Only a very small incision is needed to complete the surgical installation. This modular surgical device only needs to treat the side of the segmental prosthesis where it has failed, without using a long incision to expose the entire segmental prosthesis to the surgeon. Therefore, only a short incision is needed to complete the surgery.

[0027] 3. No forced removal is required. Segmental clavicle prosthesis failure often occurs on one side, while the other side typically maintains a relatively strong connection to the bone. This device fully utilizes this characteristic, leaving the remaining strong side untouched and focusing solely on the failed and loosened side. This avoids the risk of bone damage caused by forcibly disrupting the strong prosthesis / bone connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1a Schematic diagram of clavicle segmental prosthesis;

[0029] Figure 1b Schematic diagram of a clavicle segmental prosthesis failing near the shoulder.

[0030] Figure 1cThis is a partial enlarged view of the failure site of the clavicle segmental prosthesis near the shoulder;

[0031] Figure 2a is a three-dimensional diagram of the modular surgical device of the present invention;

[0032] Figure 2b It is a front view of the modular surgical device of the present invention;

[0033] Figure 2c It is a right side view of the modular surgical device of the present invention;

[0034] Figure 2d is a top view of the modular surgical device of the present invention;

[0035] Figure 3a is a schematic diagram (external view) of the assembly method of the modular surgical device of the present invention;

[0036] Figure 3b is a schematic diagram (with hidden lines) illustrating the assembly method of the modular surgical device of the present invention;

[0037] Figure 3c A partially enlarged front view of the modular surgical device of the present invention;

[0038] Figure 3d A partially enlarged top view of the modular surgical device of the present invention;

[0039] Figure 4 It is a schematic dimensional diagram of a top view of the modular surgical device of the present invention. DETAILED DESCRIPTION

[0040] The following is a further detailed description of a modular surgical device for clavicle segmental prosthesis revision proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention, so they have no technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0041] like Figure 1aAs shown, after a segmental clavicle defect occurs, residual clavicles remain on both sides, including a lateral residual clavicle 2 and a medial residual clavicle 3. The lateral residual clavicle 2 connects to the acromion of the scapula, and the medial residual clavicle 3 connects to the manubrium of the sternum. The clavicle segmental prosthesis 1 includes a bridging segment 12 and two connecting ends located on both sides of the clavicle segmental prosthesis 1. The connecting ends include a lateral connecting end 11 and a medial connecting end 13. The lateral connecting end 11 and the medial connecting end 13 are respectively connected to the lateral end and the medial end of the bridging segment 12, wherein the lateral side is the side near the shoulder, and the medial side is the side near the chest. A clavicle segmental prosthesis 1 is inserted into the clavicle segmental defect, the lateral connecting end 11 is connected to the lateral residual clavicle 2, and the medial connecting end 13 is connected to the medial residual clavicle 3. The clavicle segmental prosthesis 1 thus connects the lateral residual clavicle 2 and the medial residual clavicle 3, and can restore the function of the clavicle to connect the sternal manubrium and the acromion.

[0042] When a clavicle segmental prosthesis 1 fails, it typically occurs when one side of the prosthesis 1 becomes loose from the residual clavicle it is connected to, while the other side typically maintains a relatively secure connection to the corresponding residual clavicle. Specifically, in the case of a clavicle segmental prosthesis 1, looseness may occur between the lateral connecting end 11 near the shoulder and the lateral residual clavicle 2, or between the medial connecting end 13 near the chest and the medial residual clavicle 3. This loosening creates a gap, causing the clavicle to lose continuity and, consequently, become unable to transmit the mechanical load of the upper limb to the body's midline. In this case, the clavicle segmental prosthesis 1 needs to be rebuilt. Figure 1b 、 1c It illustrates that the outer connecting end 11 of the clavicle segmental prosthesis 1 near the shoulder is loosened from the outer residual clavicle 2, thereby causing the failure of the clavicle segmental prosthesis 1.

[0043] The present invention provides a modular surgical device for revision of clavicle segmental prosthesis, such as Figure 2a As shown in Figures 1 to 4, the modular surgical device includes: a clavicle fixation portion 4, which is an irregular plate-shaped structure that matches the shape of the residual clavicle on the failed side and is provided with a plurality of bone screw holes; a docking extension portion 5, which is an irregular plate-shaped structure that matches the shape of the connecting end on the failed side and is provided with a plurality of assembly screw holes, one end of which is connected to the clavicle fixation portion 4; a plurality of bone screws 6, which are respectively inserted into the respective bone screw holes on the clavicle fixation portion 4; and a plurality of assembly screws 7, which are respectively inserted into the respective assembly screw holes on the docking extension portion 5.

[0044] The modular surgical device is used to revise the clavicle segmental prosthesis 1. The clavicle fixing portion 4 is attached to the residual clavicle on the failed side, and the docking extension portion 5 is attached to the connection end on the failed side of the clavicle segmental prosthesis 1. The modular surgical device is used to re-attach the failed side of the clavicle segmental prosthesis 1 to the residual clavicle on that side. After the attachment is completed, the multiple bone screws 6 are respectively inserted into the respective bone screw holes. The multiple bone screws 6 are inserted into the residual clavicle to fasten the clavicle fixing portion 4 and the residual clavicle on the failed side. The multiple assembly screws 7 are respectively inserted into the respective assembly screw holes. The multiple assembly screws 7 are inserted into the connection end on the failed side of the clavicle segmental prosthesis 1 to fasten the docking extension portion 5 and the clavicle segmental prosthesis 1. The modular surgical device forms a tight connection with the residual clavicle and the clavicle segmental prosthesis 1 on the failed side, and can restore the mechanical function of the clavicle to transmit stress from the upper limb to the trunk mid-axis while retaining the original prosthesis.

[0045] Take the failure of the outer connection end 11 of the clavicle segmental prosthesis 1 near the shoulder as an example. Figure 3a As shown in Figures 1 to 2, the clavicle fixation portion 4 is attached to the lateral residual clavicle 2, and the docking extension portion 5 is attached to the lateral connecting end 11. The modular surgical device is used to realign the shoulder-proximal side of the clavicle segmental prosthesis 1 with the lateral residual clavicle 2. After the attachment is complete, the multiple bone screws 6 are inserted into the respective bone screw holes to securely connect the clavicle fixation portion 4 to the lateral residual clavicle 2. Furthermore, the multiple assembly screws 7 are inserted into the respective assembly screw holes to securely connect the docking extension portion 5 to the clavicle segmental prosthesis 1. Thus, a secure connection is established between the modular surgical device, the lateral residual clavicle 2, and the clavicle segmental prosthesis 1.

[0046] When the outer connecting end 11 and the inner connecting end 13 adopt a bone plate structure, as shown in FIG. Figure 1aAs shown, the inner and outer ends of the bridging section 12 respectively mate with the medial residual clavicle 3 and the lateral residual clavicle 2. The lateral connecting end 11 overlaps the lateral residual clavicle 2, and the medial connecting end 13 overlaps the medial residual clavicle 3. Specifically, the lower surface of the lateral connecting end 11 mates with the upper surface of the lateral residual clavicle 2, and the lower surface of the medial connecting end 13 mates with the upper surface of the medial residual clavicle 3. Both the lateral connecting end 11 and the medial connecting end 13 have a certain thickness. To accommodate this structure of the clavicle segmental prosthesis 1, the lower surface of the docking extension 5 is higher than the lower surface of the clavicle fixation portion 4. The upper surface of the docking extension 5 is also raised accordingly, forming a step between the docking extension 5 and the clavicle fixation portion 4. The height difference between the lower surface of the docking extension 5 and the lower surface of the clavicle fixation portion 4 is approximately equal to the thickness of the connecting end on the failed side of the clavicle segmental prosthesis 1.

[0047] The specific shape of the clavicle fixing part 4 can be individually designed based on the surface morphology of the fixation part of the residual clavicle on the failed side of the patient. Specifically, the main body of the clavicle fixing part 4 is a plate-like structure, and the shape of the edge matches the upper surface edge of the residual clavicle on the failed side. Siemens UG NX 12.0 software can be used for three-dimensional structural design. Among them, the edge of the clavicle fixing part 4 refers to the entire three-dimensional intersection contour of the clavicle fixing part 4 and the residual clavicle. The periphery of the edge of the clavicle fixing part 4 is indented a certain distance from the periphery of the edge of the residual clavicle on the failed side to avoid the prosthesis going beyond the edge of the clavicle during actual surgery. In a specific embodiment, the periphery of the edge of the clavicle fixing part 4 is indented by about 2 mm from the periphery of the edge of the residual clavicle on the failed side.

[0048] Further, if Figure 3d As shown, when failure occurs on the side of the clavicle segmental prosthesis 1 proximal to the shoulder, since the upper surface of the lateral residual clavicle 2 is relatively wide, the clavicle fixation portion 4 is provided with a protrusion structure 41 at a position corresponding to the acromion end of the lateral residual clavicle 2. This increases the contact area between the clavicle fixation portion 4 and the lateral residual clavicle 2, thereby enhancing the stability of the connection between the modular surgical device and the lateral residual clavicle 2 and extending the life of the modular surgical device. When failure occurs on the side of the clavicle segmental prosthesis 1 proximal to the chest, since the upper surface of the medial residual clavicle 3 is relatively narrow, the clavicle fixation portion 4 generally does not need to be provided with a protrusion structure 41.

[0049] The specific shape of the docking extension portion 5 can be directly copied according to the terminal shape of the connecting end of the failed side of the clavicle segmental prosthesis 1, so as to cover the connecting end of the failed side of the clavicle segmental prosthesis 1.

[0050] Each of the bone screws 6 passes through the bone screw holes and is inserted into the residual clavicle on the failed side. It is necessary to ensure that the insertion direction will not puncture the important blood vessels and nerves around the clavicle. The insertion direction of one or two bone screws 6 is perpendicular to the surface of the residual clavicle to ensure a fastening connection effect.

[0051] Each of the assembly screws 7 passes through each of the assembly screw holes and is inserted into the original nail hole at the end of the connecting end on the failed side of the clavicle segmental prosthesis 1. The position of each assembly screw hole and the insertion direction of each assembly screw 7 need to be designed according to the original nail hole at the end of the connecting end on the failed side of the clavicle segmental prosthesis 1, and match the position and direction of the original nail hole, so as to ensure that each assembly screw 7 can pass through the original nail hole, thereby realizing the assembly of the modular surgical device and the clavicle segmental prosthesis 1.

[0052] The modular surgical device and the clavicle segmental prosthesis 1 are made of the same material. In this embodiment, both are made of TC4 titanium alloy.

[0053] The thread structures of the bone screw 6 and the assembly screw 7 are different. The thread of the bone screw 6 is thin and sharp, and is used to cut and pierce the cortical bone, thereby deeply engaging the cortical bone. The thread of the assembly screw 7 is wider and thicker than the thread of the bone screw 6, and is used to connect metal parts to metal parts. Therefore, the bone screw 6 is used to achieve a fastening connection between the assembly surgical device and the residual clavicle, and the assembly screw 7 is used to achieve a fastening connection between the assembly surgical device and the clavicle segmental prosthesis 1. After passing through the clavicle segmental prosthesis 1, the assembly screw 7 may also be inserted into the residual clavicle. However, this part of the bone closest to the failure site is often induced to bone dissolution and bone fragmentation due to the presence of the original clavicle segmental prosthesis 1 and the original screw. The quality is very poor and basically cannot provide reliable mechanical support. Therefore, the assembly screw 7 used here only needs to achieve a connection between metal parts without engaging the cortical bone.

[0054] In a specific embodiment, the modular surgical device is used for adult males whose clavicle segmental prosthesis fails on the side near the shoulder, such as Figure 4 As shown, the modular surgical device is plate-shaped as a whole, with a total length of 33 mm; the thickness of the docking extension portion 5 is 3 mm and the width is 14 mm; the thickness of the clavicle fixing portion 4 is 4 mm, and the width of the protrusion structure 41 is 9 mm; the diameters of the bone screw 6 and the modular screw 7 are both 3.5 mm.

[0055] In summary, the modular surgical device provided by the present invention can be used to revise a clavicle segmental prosthesis while retaining the original prosthesis. The modular surgical device provides an interface for docking with the original failed prosthesis. One side of the modular surgical device connects to the failed side of the original segmental prosthesis via modular screws, and the other side is fixed to the remaining clavicle bone via bone screws, thereby restoring the mechanical properties of the entire clavicle. The modular surgical device only needs to treat the failed side of the segmental prosthesis, without using a long incision to expose the entire segmental prosthesis to the surgeon. Therefore, only a short incision is required to complete the surgery, which is at least 70% shorter than the original incision. The modular surgical device does not require any forced disassembly operation and does not interfere with the still secure side. Instead, it simply treats the side that has failed and loosened, thereby avoiding the risk of bone damage caused by forcibly destroying the secure prosthesis / bone connection.

[0056] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0057] In the description of the present invention, it should be understood that the terms "center," "height," "thickness," "up," "down," "vertical," "horizontal," "top," "bottom," "inside," "outside," "axial," "radial," "circumferential," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0058] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0059] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0060] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A modular surgical device for revision of a clavicle segmental prosthesis, wherein the clavicle segmental prosthesis comprises a bridging segment and two connecting ends located on either side of the bridging segment, the two connecting ends being connected to the residual clavicle on either side of the clavicle segmental defect, and wherein when the clavicle segmental prosthesis fails, the connecting end on one side becomes loose from the residual clavicle connected to that side, characterized in that: The modular surgical device is used to reconnect a loosened clavicle segmental prosthesis with the remaining clavicle, and comprises: The clavicle fixing part (4) is an irregular plate-shaped structure that matches the shape of the residual clavicle on the failed side; The docking extension portion (5) is an irregular plate-shaped structure that matches the shape of the connection end on the failed side, and one end of the docking extension portion is connected to the clavicle fixing portion (4); The clavicle fixing portion (4) is fitted on the residual clavicle on the failed side and is tightly connected to the residual clavicle on the failed side; the docking extension portion (5) is fitted on the connecting end of the failed side of the clavicle segmental prosthesis and is tightly connected to the clavicle segmental prosthesis.

2. The modular surgical device for revision of clavicle segmental prosthesis according to claim 1, characterized in that: The clavicle fixing portion (4) is provided with a plurality of bone screw holes, and the docking extension portion (5) is provided with a plurality of assembly screw holes; the assembly-type surgical device further comprises: A plurality of bone screws (6) are respectively passed through the bone screw holes on the clavicle fixing part (4) and inserted into the residual clavicle on the failed side, thereby fastening and connecting the clavicle fixing part (4) and the residual clavicle on the failed side; A plurality of assembly screws (7) are respectively passed through the assembly screw holes on the docking extension part (5) and inserted into the connection end on the failed side of the clavicle segmental prosthesis to fasten the docking extension part (5) and the clavicle segmental prosthesis.

3. The modular surgical device for revision of clavicle segmental prosthesis according to any one of claims 1 to 2, characterized in that: The height of the lower surface of the docking extension part (5) is higher than the height of the lower surface of the clavicle fixing part (4), the upper surface of the docking extension part (5) is raised upward, and the difference in height between the lower surface of the docking extension part (5) and the lower surface of the clavicle fixing part (4) is equal to the thickness of the connecting end of the failed side of the clavicle segmental prosthesis.

4. The modular surgical device for revision of clavicle segmental prosthesis according to any one of claims 1 to 2, characterized in that: The main body of the clavicle fixing portion (4) is a plate-like structure, and the shape of the edge matches the upper surface edge of the residual clavicle on the failed side; the edge of the clavicle fixing portion (4) refers to the three-dimensional boundary contour where the clavicle fixing portion (4) contacts the residual clavicle.

5. The modular surgical device for revision of clavicle segmental prosthesis according to claim 4, characterized in that: The periphery of the edge of the clavicle fixing portion (4) is retracted by a certain distance from the periphery of the edge of the residual clavicle on the failed side.

6. The modular surgical device for revision of clavicle segmental prosthesis according to any one of claims 1 to 2, characterized in that: When failure occurs on the side of the clavicle segmental prosthesis proximal to the shoulder, the clavicle fixing portion (4) is provided with a protruding structure (41) at a position corresponding to the acromion end of the residual clavicle.

7. The modular surgical device for revision of clavicle segmental prosthesis according to claim 2, characterized in that: The insertion direction of one or two bone screws (6) is perpendicular to the surface of the residual clavicle.

8. The modular surgical device for revision of clavicle segmental prosthesis according to claim 2, characterized in that: The position of each assembly screw hole and the insertion direction of each assembly screw (7) match the position of the original screw hole at the end of the connection end on the failed side of the clavicle segmental prosthesis. After each assembly screw (7) passes through each assembly screw hole, it is inserted into the corresponding original screw hole at the end of the connection end on the failed side of the clavicle segmental prosthesis.

9. The modular surgical device for revision of clavicle segmental prosthesis according to claim 2, characterized in that: The thread of the assembly screw (7) is wider and thicker than the thread of the bone screw (6).

10. The modular surgical device for revision of clavicle segmental prosthesis according to any one of claims 1 to 2, characterized in that: The modular surgical device is made of the same material as that of the clavicle segmental prosthesis.

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