Extended segment prosthesis and prosthesis system

Abstract

The invention relates to an extension section prosthesis and a prosthesis system.The extension section prosthesis comprises a main body part and a connecting part, the connecting part is arranged at the axial end of the main body part and used for being matched with a knee joint prosthesis, the end, away from the connecting part, of the main body part is provided with a bone contact face, a trophoblast is formed in the main body part, and the bone contact face is matched with the trophoblast. One end of each nutrient foramen is communicated with the bone contact surface, and the other end of each nutrient foramen is communicated with the outer wall surface of the main body part. The fusion effect of the extension section prosthesis and surrounding tissues is good, the stability after implantation is high, and the extension section prosthesis is not prone to loosening.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an extended segment prosthesis and a prosthesis system. Background Art

[0002] Currently, primary and secondary malignant bone tumors are lesions of the locomotor system that seriously threaten patients' survival and quality of life. The common surgical method for patients with bone tumors is to remove the tumor lesions first, and then fill the missing bone with an extended prosthesis to adjust the length of the patient's limbs.

[0003] In the related art, the extended prosthesis is separated from the patient's soft tissue after implantation, and the fusion rate of the extended prosthesis with the surrounding soft tissue is slow, resulting in poor biocompatibility and stability of the prosthesis, and increasing the risk of loosening of the extended prosthesis. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides an extended segment prosthesis, which has a better fusion effect with the surrounding tissue, has a higher stability after implantation, and is not easy to loosen.

[0006] An embodiment of the present invention further provides a prosthesis system.

[0007] The extended segment prosthesis of an embodiment of the present invention includes: a main body and a connecting part, the connecting part is arranged at one axial end of the main body and is used to be assembled with a knee joint prosthesis, the end of the main body away from the connecting part has a bone contact surface, a nourishing hole is provided in the main body, one end of the nourishing hole is connected to the bone contact surface, and the other end of the nourishing hole is connected to the outer wall surface of the main body.

[0008] According to the extended prosthesis of the embodiment of the present invention, after the extended prosthesis is implanted in the human body, one end of the extended prosthesis is connected to the knee joint prosthesis through the connecting part, and the other end of the extended prosthesis contacts the osteotomy surface of the human bone through the bone contact surface. During the operation, the doctor can arrange the blood vessels in the nutrient foramen. Since one end of the nutrient foramen is connected to the bone contact surface, as the patient recovers after surgery, the blood vessels in the nutrient foramen can guide the bone to grow into the nutrient foramen, thereby promoting the fusion of the extended prosthesis with the human bone. Therefore, the extended prosthesis of the embodiment of the present invention has a better fusion effect with the surrounding tissues, has a higher stability after implantation, and is not easy to loosen.

[0009] In some embodiments, the aperture of the nutrient pore is A, wherein 0.5 mm ≤ A ≤ 3 mm; and / or, there are a plurality of nutrient pores, and the plurality of nutrient pores are arranged at intervals along the circumference of the main body.

[0010] In some embodiments, there is an angle between the length direction of the nutrient hole and the axial direction of the main body, the size of the angle is negatively correlated with the axial length of the main body, and the length of the nutrient hole is positively correlated with the axial length of the main body.

[0011] In some embodiments, an anti-rotation groove is provided at one end of the main body portion away from the connecting portion, and the anti-rotation groove penetrates the main body portion in a radial direction, and at least part of the human bone fits in the anti-rotation groove; and / or, the connecting portion is a frustum, and the outer peripheral contour of the frustum gradually decreases along the direction away from the main body portion.

[0012] In some embodiments, the main body includes a first suture segment, a second suture segment and a third suture segment, which are arranged sequentially in the direction from the proximal end of the main body to the distal end of the main body, and at least two of the first suture segment, the second suture segment and the third suture segment are provided with a horizontal suture hole, both ends of the horizontal suture hole are respectively connected to different positions of the outer wall surface of the main body, and the horizontal suture hole extends in a direction orthogonal to the axial direction of the main body.

[0013] In some embodiments, the first suture segment is provided with a plurality of first horizontal suture holes, which are arranged in the first suture segment at intervals along the axial direction of the main body; the second suture segment is provided with a plurality of second horizontal suture holes, which are arranged in the second suture segment at intervals along the axial direction of the main body; the third suture segment is provided with a plurality of third horizontal suture holes, which are arranged in the third suture segment at intervals along the axial direction of the main body.

[0014] In some embodiments, the axial length of the first suture segment is B1, the axial length of the second suture segment is B2, and the axial length of the third suture segment is B3, wherein 5mm≤B1≤60mm, 60mm≤B2≤150mm, and 150mm≤B3≤220mm; and / or, the spacing between two adjacent first horizontal suture holes, the spacing between two adjacent second horizontal suture holes, and the spacing between two adjacent third horizontal suture holes are all C, wherein 10mm≤C≤20mm; and / or, one of the first horizontal suture hole, the second horizontal suture hole, and the third horizontal suture hole includes a first hole segment and a second hole segment, the first hole segment and the second hole segment are respectively arranged on both sides of the axis of the main body, and the extension paths of the first hole segment and the second hole segment are both straight lines; and / or, one of the first horizontal suture hole, the second horizontal suture hole, and the third horizontal suture hole includes a first hole segment and a second hole segment, the first hole segment and the second hole segment are respectively arranged on both sides of the axis of the main body, and the extension paths of the first hole segment and the second hole segment are both curves, and the curve protrudes toward the direction close to the axis of the main body.

[0015] In some embodiments, at least one of the first suture segment, the second suture segment and the third suture segment is provided with a vertical suture hole, both ends of the vertical suture hole are respectively connected to different positions of the outer wall surface of the main body, and the vertical suture hole extends along the axial direction of the main body.

[0016] In some embodiments, the vertical suture holes include a first vertical suture hole and a second vertical suture hole, and the first vertical suture hole and the second vertical suture hole are arranged axially at intervals along the main body; and / or, the vertical suture holes include a third vertical suture hole and a fourth vertical suture hole, and the third vertical suture hole and the fourth vertical suture hole are arranged crosswise; and / or, there are multiple vertical suture holes, and the length direction of at least one of the vertical suture holes has an angle α with the axis of the main body, wherein 10°≤α≤90°; and / or, the port of at least one of the nourishing hole, the horizontal suture hole and the vertical suture hole has an arc chamfer, and the radius of the arc chamfer is R1, wherein 0.1mm≤R1≤5mm.

[0017] The prosthesis system according to the embodiment of the present invention comprises: an extended segment prosthesis, wherein the extended segment prosthesis is any one of the extended segment prostheses described in the embodiments of the present invention; and a knee joint prosthesis connected to the connecting portion.

[0018] According to the prosthesis system of the embodiment of the present invention, after the extended prosthesis is implanted in the human body, one end of the extended prosthesis is connected to the knee joint prosthesis through the connecting part, and the other end of the extended prosthesis contacts the osteotomy surface of the human bone through the bone contact surface. During the operation, the doctor can arrange the blood vessels in the nutrient foramen. Since one end of the nutrient foramen is connected to the bone contact surface, as the patient recovers after surgery, the blood vessels in the nutrient foramen can guide the bone to grow into the nutrient foramen, thereby promoting the fusion of the extended prosthesis with the human bone. Therefore, the extended prosthesis of the embodiment of the present invention has a better fusion effect with the surrounding tissue, has a higher stability after implantation, and is not easy to loosen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the connection between the extended prosthesis and human bone according to an embodiment of the present invention.

[0020] Figure 2 It is a partial cross-sectional view of the human body bone connection of the extended segment prosthesis according to an embodiment of the present invention.

[0021] Figure 3 Schematic diagram of an extended segment prosthesis according to an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of an extended segment prosthesis according to another embodiment of the present invention.

[0023] Figure 5 is a cross section of the extended prosthesis of an embodiment of the present invention Figure 1 .

[0024] Figure 6 is a cross section of the extended prosthesis of an embodiment of the present invention Figure 2 .

[0025] Figure 7 is a cross section of the extended prosthesis of an embodiment of the present invention Figure 3 .

[0026] Figure 8 is a cross section of the extended prosthesis of an embodiment of the present invention Figure 3 .

[0027] Fig. 9 is a cross section of the extended prosthesis of an embodiment of the present invention Figure 4 .

[0028] Fig.10 is a cross section of the extended prosthesis of an embodiment of the present invention Figure 5 .

[0029] Fig.11 It is a schematic diagram of an extended segment prosthesis according to another embodiment of the present invention.

[0030] Fig.12It is a schematic diagram of an extended segment prosthesis according to another embodiment of the present invention.

[0031] Reference numerals: 1. Extended prosthesis; 11. Main body; 101. First suture segment; 102. Second suture segment; 103. Third suture segment; 111. Nutrient hole; 112. Anti-rotation groove; 113, horizontal suture hole; 1131, first horizontal suture hole; 1132, second horizontal suture hole; 1133, third horizontal suture hole; 11301, first hole segment; 11302, second hole segment; 11303, third hole segment; 114, vertical suture hole; 1141, first vertical suture hole; 1142, second vertical suture hole; 1143, third vertical suture hole; 1144, fourth vertical suture hole; 12. Connecting part; 121. Round table; 2. Human bones. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] Please refer to the following Figures 1 to 12 An extension prosthesis and a prosthesis system according to embodiments of the present invention are described.

[0034] like Figures 1 to 3 As shown, the extended segment prosthesis 1 of the embodiment of the present invention includes: a main body 11 and a connecting portion 12, the connecting portion 12 is arranged at one axial end of the main body 11, and is used to be assembled with a knee joint prosthesis, the end of the main body 11 away from the connecting portion 12 has a bone contact surface, and a nourishing hole 111 is provided in the main body 11, one end of the nourishing hole 111 is connected to the bone contact surface, and the other end of the nourishing hole 111 is connected to the outer wall surface of the main body 11.

[0035] According to the extended prosthesis 1 of the embodiment of the present invention, after the extended prosthesis 1 is implanted in the human body, one end of the extended prosthesis 1 is connected to the knee joint prosthesis through the connecting portion 12, and the other end of the extended prosthesis 1 contacts the osteotomy surface of the human bone 2 through the bone contact surface. During the operation, the doctor can arrange the blood vessels in the nutrient foramen 111. Since one end of the nutrient foramen 111 is connected to the bone contact surface, as the patient recovers after surgery, the blood vessels in the nutrient foramen 111 can guide the bone to grow into the nutrient foramen 111, thereby promoting the fusion of the extended prosthesis 1 and the human bone 2. Therefore, the extended prosthesis 1 of the embodiment of the present invention has a better fusion effect with the surrounding tissues, has a higher stability after implantation, and is not easy to loosen.

[0036] It is understandable that during the operation, the doctor can change the vascular layout of the osteotomy position of the human body, that is, the doctor can put the blood vessels into the nutrient foramen 111. During the patient's postoperative recovery, under the guidance of the blood vessels in the nutrient foramen 111, the newly grown bones can enter the nutrient foramen 111. The function of the blood vessel ends (capillaries) is to exchange nutrients and promote bone growth. Since the bones at the original osteotomy position of the patient have been removed, the nutrient foramen 111 can guide the capillaries to extend to the place where the bones still exist, so as to maintain good blood supply and nutrient supply at the osteotomy position of the patient, improve the local environment of the bones, and help reduce the risk of complications such as infection and aseptic loosening.

[0037] In other words, the presence of the nutrient hole 111 allows blood vessels to pass through, providing blood supply for the human body's bone development, so as to further promote blood exchange between the bone and surrounding tissues, help accelerate the healing of the bone at the osteotomy position, and facilitate the patient's rapid recovery after surgery.

[0038] The extended prosthesis 1 can be implanted into the femur or tibia of a human body. The present invention does not limit the specific installation position of the extended prosthesis 1.

[0039] For example, when the extended prosthesis 1 is implanted into a human femur, the bone contact surface is the proximal end of the extended prosthesis 1 (eg Figure 1 The upper end of the middle extension prosthesis 1), the connecting portion 12 is the distal end of the extension prosthesis 1 (such as Figure 1 The lower end of the middle extension prosthesis 1), at this time, the connecting portion 12 is used to connect with the femoral prosthesis in the knee joint prosthesis, and the bone contact surface is in contact with the osteotomy surface of the femur.

[0040] For another example, when the extended prosthesis 1 is implanted into the human tibia, the bone contact surface is the proximal end of the extended prosthesis 1, and the connecting portion 12 is the distal end of the extended prosthesis 1. At this time, the connecting portion 12 is used to connect to the tibial prosthesis in the knee joint prosthesis, and the bone contact surface fits the osteotomy surface of the tibia.

[0041] Optionally, the aperture of the nutrient pore 111 is A, wherein 0.5 mm ≤ A ≤ 3 mm. For example, the aperture A of the nutrient pore 111 may be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm.

[0042] The inventor of the present application has found through experimental research that when the aperture A of the nutrient hole 111 is less than 0.5 mm, it is difficult for the doctor to place the blood vessel into the nutrient hole 111 during the operation, which makes the doctor's operation inconvenient, and the nutrient hole 111 with a small aperture (less than 0.5 mm) is not conducive to the growth of blood vessels and bones, and reduces the fusion effect of the extended prosthesis 1 and the human bone 2. In addition, when the aperture of the nutrient hole 111 is too large (greater than 3 mm), the blood vessel placed in the nutrient hole 111 may fall out with the patient's postoperative movement, and the postoperative fusion effect is poor. Moreover, when the aperture of the nutrient hole 111 is too large, it will have an adverse effect on the structural strength of the extended prosthesis 1, and there may be a risk of prosthesis collapse and loosening.

[0043] Alternatively, if Figure 3 As shown, there are multiple nutrient holes 111, and the multiple nutrient holes 111 are arranged at intervals along the circumference of the main body 11. For example, there may be two, four, six or eight nutrient holes 111. The extended segment prosthesis 1 of the embodiment of the present invention can further improve the fusion effect between the extended segment prosthesis 1 and the human bone 2 by providing multiple nutrient holes 111, which is beneficial to improving the stability of the extended segment prosthesis 1 after implantation.

[0044] like Figure 3 As shown, there is an angle β between the length direction of the nutrient foramen 111 and the axial direction of the main body 11, and the size of the angle β is negatively correlated with the axial length of the main body 11, and the length of the nutrient foramen 111 is positively correlated with the axial length of the main body 11. It can be understood that when the length model of the main body 11 is longer, the length of the nutrient foramen 111 is longer, and the angle β is correspondingly reduced. As a result, the nutrient foramen 111 can accommodate longer blood vessels, and more bones grow into the nutrient foramen 111, so that different models of extended segment prostheses 1 can be adapted to patients with different conditions, which can further improve the stability of the extended segment prosthesis 1 after implantation, and the adaptability is higher.

[0045] Alternatively, if Figure 2 and Figure 3 As shown, an anti-rotation groove 112 is provided at one end of the main body 11 away from the connecting portion 12, and the anti-rotation groove 112 penetrates the main body 11 in the radial direction of the main body 11, and at least part of the human bone 2 fits in the anti-rotation groove 112. In this way, the implanted extended prosthesis 1 can be circumferentially limited, which is beneficial to improving the stability of the implanted extended prosthesis 1, and because part of the human bone 2 fits in the anti-rotation groove 112, the amount of osteotomy can be reduced, which is beneficial to the patient's postoperative recovery.

[0046] For example, Figure 3 As shown, the radial width M of the anti-rotation groove 112 can be selected between 10 mm and 20 mm, which improves the stability of the extended prosthesis 1 after being connected to the human bone 2 and has a better anti-rotation effect.

[0047] like Figure 3 As shown, the connection portion 12 is a frustum 121, and the outer peripheral contour of the frustum 121 gradually decreases in the direction away from the main body 11, so that the connection portion 12 can be assembled with the knee joint prosthesis.

[0048] For example, Figure 3 As shown, the axial length of the main body 11 is H, where H can be selected between 20 mm and 300 mm to meet the needs of various groups of people, such as children and teenagers, adults, and the elderly. In addition, after the tumor is removed, the limbs will be unequal in length. Since the H value is designed to be extended, the length can be adjusted according to the actual needs of the patient, thereby solving the problem of unequal limb lengths of the patient.

[0049] like Figure 3 As shown, the connection position of the connecting portion 12 and the main body 11 is provided with a transition fillet R2, thereby avoiding the problem of fracture due to stress concentration at the connection position of the connecting portion 12 and the main body 11. For example, the transition fillet R2 can be selected between 0.5mm-10mm.

[0050] In some embodiments, Figure 4 As shown, the main body 11 includes a first suture segment 101, a second suture segment 102 and a third suture segment 103, and the first suture segment 101, the second suture segment 102 and the third suture segment 103 are at the proximal end of the main body 11 (such as Figure 3 The main body 11 is provided with an anti-rotation groove 112 at one end) to the distal end of the main body 11 (such as Figure 3 The first suture segment 101, the second suture segment 102 and the third suture segment 103 are arranged in sequence in the direction of one end of the connecting portion 12 being provided in the middle main body portion 11, and a horizontal suture hole 113 is provided on at least two of the first suture segment 101, the second suture segment 102 and the third suture segment 103, and the two ends of the horizontal suture hole 113 are respectively connected to different positions of the outer wall surface of the main body portion 11, and the horizontal suture hole 113 extends in a direction orthogonal to the axial direction of the main body portion 11.

[0051] For example, the first suture segment 101 and the second suture segment 102 are provided with horizontal suture holes 113. Alternatively, the first suture segment 101 and the third suture segment 103 are provided with horizontal suture holes 113. Alternatively, the second suture segment 102 and the third suture segment 103 are provided with horizontal suture holes 113.

[0052] For another example, the first suture segment 101 , the second suture segment 102 , and the third suture segment 103 are all provided with horizontal suture holes 113 .

[0053] The extended prosthesis 1 of the embodiment of the present invention can fully cover and protect the soft tissue and wound around the extended prosthesis 1 by setting horizontal suture holes 113 at different positions of the first suture section 101, the second suture section 102 and the third suture section 103, so as to prevent the prosthesis from being separated from the soft tissue and causing the problem of unstable fixation of the prosthesis. In addition, the three-stage binding structure design can apply appropriate pressure to the soft tissue and the wound, which helps the soft tissue and the prosthesis to grow into the body quickly, and also helps to stop bleeding by compression, reduce the amount of bleeding and the risk of blood loss, and speed up the recovery time for patients after surgery.

[0054] In addition, since the horizontal suture hole 113 extends in a direction orthogonal to the axial direction of the main body 11, the incision tension can be evenly sutured on the extended prosthesis 1, thereby reducing the degree of damage to the soft tissue and alleviating postoperative incision pain.

[0055] Alternatively, if Figure 4 As shown, the first suture segment 101 is provided with a plurality of first horizontal suture holes 1131, which are arranged at intervals along the axial direction of the main body 11 in the first suture segment 101, the second suture segment 102 is provided with a plurality of second horizontal suture holes 1132, which are arranged at intervals along the axial direction of the main body 11 in the second suture segment 102, and the third suture segment 103 is provided with a plurality of third horizontal suture holes 1133, which are arranged at intervals along the axial direction of the main body 11 in the third suture segment 103. The extended segment prosthesis 1 of the embodiment of the present invention can fully cover and protect the soft tissue and wound around the extended segment prosthesis 1 by arranging the horizontal suture holes 113 in the above manner, so as to prevent the prosthesis from being separated from the soft tissue and causing the problem of unstable fixation of the prosthesis. In addition, the three-stage binding structure design can apply appropriate pressure to the soft tissue and the wound, which helps the soft tissue and the prosthesis to grow into the fit quickly, and also helps to stop bleeding by compression, reduce the amount of bleeding and the risk of blood loss, and speed up the recovery time for the patient after surgery.

[0056] Optionally, the axial length of the first suture segment 101 is B1, the axial length of the second suture segment 102 is B2, and the axial length of the third suture segment 103 is B3, wherein 5mm≤B1≤60mm, 60mm≤B2≤150mm, and 150mm≤B3≤220mm.

[0057] It is understood that B1 can be selected between 5mm-60mm, for example, B1 can be 5mm, 20mm, 30mm, 40mm, 60mm. B2 can be selected between 60mm-150mm, for example, B2 can be 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm. B3 can be selected between 150mm-220mm, for example, B3 can be 150mm, 170mm, 190mm, 200mm, 210mm, 220mm.

[0058] The extended segment prosthesis 1 of the embodiment of the present invention arranges the first suture segment 101, the second suture segment 102 and the third suture segment 103 with the above-mentioned parameters to meet the usage requirements of different patients. The extended segment prosthesis 1 is sutured and fixed in three sections (i.e., the proximal section, the middle section, and the distal section), or the extended segment prosthesis 1 can also be sutured and fixed in the form of more than three sections, which can fully cover and protect the soft tissue and wound, and is beneficial to the patient's postoperative recovery.

[0059] Optionally, the spacing between two adjacent first horizontal suture holes 1131, the spacing between two adjacent second horizontal suture holes 1132, and the spacing between two adjacent third horizontal suture holes 1133 are all C, wherein 10mm≤C≤20mm. It is understandable that the spacing C between the upper and lower adjacent horizontal suture holes 113 can be 10mm, 12mm, 14mm, 16mm, 18mm, or 20mm. This can ensure that the binding wire after suture exerts appropriate pressure on the soft tissue and the wound, which helps the soft tissue and the prosthesis to grow into the wound quickly, and can also reduce the problem of soft tissue being damaged by multiple needle sutures in the same area, which is beneficial to the patient's postoperative recovery.

[0060] Exemplarily, the first horizontal suture hole 1131 of the first suture segment 101 can overlap with the second horizontal suture hole 1132 of the second suture segment 102, and the second horizontal suture hole 1132 of the second suture segment 102 can overlap with the third horizontal suture hole 1133 of the third suture segment 103, so as to further reduce the problem of soft tissue being damaged by multiple needle sutures in the same area, thereby facilitating the patient's postoperative recovery.

[0061] Optionally, one of the first horizontal suture hole 1131, the second horizontal suture hole 1132 and the third horizontal suture hole 1133 includes a first hole segment 11301 and a second hole segment 11302, and the first hole segment 11301 and the second hole segment 11302 are respectively arranged on both sides of the axis of the main body 11, and the extension paths of the first hole segment 11301 and the second hole segment 11302 are both straight lines.

[0062] It can be understood that the first hole segment 11301 and the second hole segment 11302 are located at the same horizontal height of the main body 11, and the first hole segment 11301 and the second hole segment 11302 can be arranged in parallel or in a cross arrangement.

[0063] like Figure 5 As shown, the first hole section 11301 and the second hole section 11302 are arranged horizontally along the horizontal plane. The horizontal suture holes can facilitate the doctor's surgical suture, facilitate the doctor to accurately locate the incision position, provide a clear field of vision, facilitate surgical operations, and shorten the operation time.

[0064] like Figure 6 As shown, the first hole segment 11301 and the second hole segment 11302 are arranged longitudinally along the horizontal plane. The longitudinal suture holes are used to connect with the front and back soft tissues, or can be used crosswise with the transverse suture holes. The longitudinal suture holes can provide a better stabilization effect. When it is necessary to withstand greater tension or pressure, the above design helps to maintain the stability of the tissue.

[0065] like Figure 8 As shown, the first hole segment 11301 and the second hole may also be arranged crosswise.

[0066] In other examples, such as Figure 7 As shown, one of the first horizontal suture hole 1131, the second horizontal suture hole 1132 and the third horizontal suture hole 1133 includes a first hole segment 11301, a second hole segment 11302 and a third hole segment 11303. The first hole segment 11301, the second hole segment 11302 and the third hole segment 11303 are arranged roughly in a triangle in the same horizontal plane. For example, sutures, ligaments or tendons can be passed through the first hole segment 11301, the second hole segment 11302 and the third hole segment 11303.

[0067] It is understandable that the triangular horizontal suture hole 113 can firmly bind the extended prosthesis 1 to the soft tissue to disperse the binding pressure and stress, and the triangular horizontal suture hole 113 allows the suture to penetrate from three directions to firmly fix the soft tissue to the extended prosthesis 1. On the other hand, the triangular horizontal suture hole 113 helps to guide the blood flow and soft tissue flow, and flows through the various triangular channels. It helps the soft tissues to grow and adhere through the various triangular channels, so that the biocompatibility of the extended prosthesis 1 is better.

[0068] like Fig. 9As shown, one of the first horizontal suture hole 1131, the second horizontal suture hole 1132 and the third horizontal suture hole 1133 includes a first hole segment 11301 and a second hole segment 11302, and the first hole segment 11301 and the second hole segment 11302 are respectively arranged on both sides of the axis of the main body 11, and the extension paths of the first hole segment 11301 and the second hole segment 11302 are both curves, and the curves protrude toward the direction close to the axis of the main body 11.

[0069] The curved horizontal suture hole 113 can suture the soft tissue and the extended prosthesis 1 more tightly by means of sutures, because the extension paths of the first hole segment 11301 and the second hole segment 11302 of the above-mentioned structural arrangement are adapted to the curvature of the human tissue, and the gap between the soft tissue and the extended prosthesis 1 can be reduced, so that the implanted prosthesis is more stable and the wound heals faster. In addition, the curved horizontal suture hole 113 can increase the contact area between the sutures and the extended prosthesis 1 and the soft tissue, thereby increasing the fixing effect of the extended prosthesis 1 and the soft tissue.

[0070] like Fig. 9 and Fig.10 As shown, the curved first hole segment 11301 and the second hole segment 11302 can be arranged symmetrically or asymmetrically, and the present invention is not limited to this. Exemplarily, the first hole segment 11301 and the second hole segment 11302 are arranged symmetrically, and the symmetrically arranged horizontal suture holes 113 can adapt to the natural curvature of human tissue, can reduce the additional pressure and tension caused by suturing, and help wound healing and fixation of soft tissue and the extended segment prosthesis 1.

[0071] In some embodiments, Fig.11 and Fig.12 As shown, a vertical suture hole 114 is provided on at least one of the first suture segment 101, the second suture segment 102 and the third suture segment 103, both ends of the vertical suture hole 114 are respectively connected to different positions of the outer wall surface of the main body 11, and the vertical suture hole 114 extends along the axial direction of the main body 11.

[0072] The design of the vertical suture holes 114 is in line with the physiological structure of the human body, because many tissues of the human body, such as muscles, blood vessels, and nerves, are basically arranged longitudinally along the sagittal plane. The design of the vertical suture holes 114 better conforms to the natural direction of these tissues and reduces the damage to the tissues during suturing. The vertical suture holes 114 can provide a better stabilizing effect. When it is necessary to withstand greater tension or pressure, the above design helps to maintain the stability of the soft tissue.

[0073] Optionally, the vertical suture holes 114 include a first vertical suture hole 1141 and a second vertical suture hole 1142, and the first vertical suture hole 1141 and the second vertical suture hole 1142 are arranged axially at intervals along the main body 11, thereby fully covering and protecting the soft tissue and wound around the extended prosthesis 1, preventing the prosthesis from detaching from the soft tissue, thereby preventing the prosthesis from being unstable.

[0074] like Fig.11 and Fig.12 As shown, the vertical suture holes 114 include a third vertical suture hole 1143 and a fourth vertical suture hole 1144, and the third vertical suture hole 1143 and the fourth vertical suture hole 1144 are arranged crosswise. Thus, the extended prosthesis 1 can be more closely attached to the soft tissue to promote wound healing, and the suture structure helps to reduce soft tissue damage and pain, and can form a biological bond between the soft tissue and the extended prosthesis 1, thereby improving the biocompatibility and stability of the extended prosthesis 1.

[0075] In one example, the first vertical suture hole 1141 is arranged adjacent to the proximal end of the main body 11, and the second vertical suture hole 1142 is arranged adjacent to the distal end of the main body 11. The distance between the proximal end of the first vertical suture hole 1141 and the proximal end of the main body 11 is F1, and F1 is selected between 5mm-60mm. The distance between the proximal end of the first vertical suture hole 1141 and the distal end of the first vertical suture hole 1141 along the axial direction of the main body 11 is F2, and F1 is selected between 60mm-120mm. The distance between the distal end of the first vertical suture hole 1141 and the proximal end of the second vertical suture hole 1142 along the axial direction of the main body 11 is F3, and F3 is selected between 120mm-150mm. The distance between the proximal end of the second vertical suture hole 1142 and the distal end of the second vertical suture hole 1142 along the axial direction of the main body 11 is F4, and F4 is selected between 150mm-220mm.

[0076] Alternatively, if Fig.12 As shown, there are multiple vertical suture holes 114, and the length direction of at least one vertical suture hole 114 has an angle α with the axis of the main body 11, wherein 10°≤α≤90°. For example, the angle α can be 10°, 30°, 50°, 70°, or 90°. It is understandable that there is often a certain tension between the soft tissue and the extended prosthesis 1 during suturing. The present application can change the direction of the suture line by designing the length direction of the vertical suture hole 114 to have a certain angle with the axis of the main body 11, thereby effectively dispersing these tensions and reducing the problems of failure of fixation of the extended prosthesis 1, separation of the soft tissue from the prosthesis, or suture breakage caused by excessive tension.

[0077] In the example of the present invention, the first suture segment 101, the second suture segment 102, and the horizontal suture holes 113 and the vertical suture holes 114 on the extended prosthesis 1 can be individually or cross-matched up and down, left and right, front and back to complete the fixation of the extended prosthesis 1 and the soft tissue. The above suture structure can firmly suture the soft tissue flesh, muscles, tendons, ligaments, etc. to the extended prosthesis 1, so that the extended prosthesis 1 and the surrounding soft tissue form a stable structure, which helps to reduce the patient's soft tissue damage and pain.

[0078] Optionally, at least one of the nutrient holes 111, the horizontal suture holes 113, and the vertical suture holes 114 has an arc chamfer, and the radius of the arc chamfer is R1, wherein 0.1 mm ≤ R1 ≤ 5 mm. The arc surface of the arc chamfer can be a single arc surface or a structure of multiple arc surfaces spliced ​​together, thereby avoiding the problem of friction and cutting between the port positions of the nutrient holes 111, the horizontal suture holes 113, and the vertical suture holes 114 and the ligaments or sutures.

[0079] like Figure 1 As shown, the prosthesis system of an embodiment of the present invention comprises: an extended segment prosthesis 1 and a knee joint prosthesis (not shown), the extended segment prosthesis 1 is the extended segment prosthesis 1 of the present invention, and the knee joint prosthesis is connected to the connecting portion 12 .

[0080] According to the prosthesis system of the embodiment of the present invention, after the extended prosthesis 1 is implanted into the human body, one end of the extended prosthesis 1 is connected to the knee joint prosthesis through the connecting portion 12, and the other end of the extended prosthesis 1 contacts the osteotomy surface of the human bone 2 through the bone contact surface. During the operation, the doctor can arrange the blood vessels in the nutrient hole 111. Since one end of the nutrient hole 111 is connected to the bone contact surface, as the patient recovers after surgery, the blood vessels in the nutrient hole 111 can guide the bone to grow into the nutrient hole 111, thereby promoting the fusion of the extended prosthesis 1 and the human bone 2. Therefore, the extended prosthesis 1 of the embodiment of the present invention has a better fusion effect with the surrounding tissues, has a higher stability after implantation, and is not easy to loosen.

[0081] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0085] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An extended prosthesis, characterized in that: It includes a main body and a connecting part, the connecting part is arranged at one axial end of the main body and is used to be assembled with a knee joint prosthesis, the end of the main body away from the connecting part has a bone contact surface, a nourishing hole is arranged in the main body, one end of the nourishing hole is connected to the bone contact surface, and the other end of the nourishing hole is connected to the outer wall surface of the main body.

2. The extended prosthesis according to claim 1, characterized in that: The aperture of the nutrient pore is A, wherein 0.5 mm ≤ A ≤ 3 mm; And / or, there are a plurality of the nourishing holes, and the plurality of the nourishing holes are arranged at intervals along the circumference of the main body.

3. The extended prosthesis according to claim 1, characterized in that: An angle is formed between the length direction of the nutrient hole and the axial direction of the main body, the size of the angle is negatively correlated with the axial length of the main body, and the length of the nutrient hole is positively correlated with the axial length of the main body.

4. The extended prosthesis according to claim 1, characterized in that: An anti-rotation groove is provided at one end of the main body away from the connecting portion, the anti-rotation groove penetrates the main body along the radial direction of the main body, and at least part of the human bone fits in the anti-rotation groove; And / or, the connecting portion is a frustum, and the outer peripheral contour of the frustum gradually decreases in a direction away from the main body.

5. The extension prosthesis according to any one of claims 1 to 4, characterized in that: The main body includes a first suture segment, a second suture segment and a third suture segment, which are arranged in sequence from the proximal end of the main body to the distal end of the main body, and at least two of the first suture segment, the second suture segment and the third suture segment are provided with a horizontal suture hole, both ends of the horizontal suture hole are respectively connected to different positions of the outer wall surface of the main body, and the horizontal suture hole extends in a direction orthogonal to the axial direction of the main body.

6. The extended prosthesis according to claim 5, characterized in that: The first suture section is provided with a plurality of first horizontal suture holes, and the plurality of first horizontal suture holes are arranged in the first suture section at intervals along the axial direction of the main body. The second suture section is provided with a plurality of second horizontal suture holes, and the plurality of second horizontal suture holes are arranged in the second suture section at intervals along the axial direction of the main body. The third suture section is provided with a plurality of third horizontal suture holes, and the plurality of third horizontal suture holes are arranged in the third suture section at intervals along the axial direction of the main body.

7. The extended prosthesis according to claim 6, characterized in that: The axial length of the first suture segment is B1, the axial length of the second suture segment is B2, and the axial length of the third suture segment is B3, wherein 5 mm ≤ B1 ≤ 60 mm, 60 mm ≤ B2 ≤ 150 mm, and 150 mm ≤ B3 ≤ 220 mm; and / or, the spacing between two adjacent first horizontal suture holes, the spacing between two adjacent second horizontal suture holes, and the spacing between two adjacent third horizontal suture holes are all C, wherein 10 mm ≤ C ≤ 20 mm; And / or, one of the first horizontal suture hole, the second horizontal suture hole and the third horizontal suture hole comprises a first hole segment and a second hole segment, the first hole segment and the second hole segment are respectively arranged on both sides of the axis of the main body, and the extension paths of the first hole segment and the second hole segment are both straight lines; And / or, one of the first horizontal suture hole, the second horizontal suture hole and the third horizontal suture hole includes a first hole segment and a second hole segment, the first hole segment and the second hole segment are respectively arranged on both sides of the axis of the main body, and the extension paths of the first hole segment and the second hole segment are both curves, and the curves protrude in the direction close to the axis of the main body.

8. The extended prosthesis according to claim 5, characterized in that: A vertical suture hole is provided on at least one of the first suture segment, the second suture segment and the third suture segment, two ends of the vertical suture hole are respectively connected to different positions of the outer wall surface of the main body, and the vertical suture hole extends along the axial direction of the main body.

9. The extended prosthesis according to claim 8, characterized in that: The vertical suture holes include a first vertical suture hole and a second vertical suture hole, wherein the first vertical suture hole and the second vertical suture hole are arranged axially spaced apart from each other along the main body; And / or, the vertical suture holes include a third vertical suture hole and a fourth vertical suture hole, and the third vertical suture hole and the fourth vertical suture hole are arranged crosswise; And / or, there are a plurality of vertical suture holes, and the length direction of at least one of the vertical suture holes forms an angle α with the axis of the main body, wherein 10°≤α≤90°; And / or, a port of at least one of the nourishing hole, the horizontal suture hole and the vertical suture hole has an arc chamfer, and the radius of the arc chamfer is R1, wherein 0.1 mm≤R1≤5 mm.

10. A prosthesis system, characterized in that: include: An extended segment prosthesis, wherein the extended segment prosthesis is the extended segment prosthesis according to any one of claims 1 to 9; A knee joint prosthesis is connected to the connecting part.

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