Focal cartilage defect repair body
A prosthetic and cartilage technology, applied in the direction of joint implants, joint implants, etc., can solve the problems of long functional recovery time and reoperation, and achieve the effect of high matching degree, short time and high efficiency
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Embodiment 1
[0040] Such as figure 2 As shown, a focal cartilage defect restoration is composed of a body 1 and a fixing nail 2. Both the body and the fixing nail can be directly processed, without cell transplantation and proliferation, and can be customized individually. :
[0041] The body is a double-layer structure composed of a cartilage layer 3 and a fixed layer 4;
[0042] The material of the cartilage layer is not limited, as long as it can make the cartilage layer have mechanical properties similar to the cartilage around the defect, ensure a certain viscoelasticity and compression modulus, and will not produce stress shielding or excessive compression during load bearing. Polyethylene or materials similar in physical properties to polyethylene, or a mixture of collagen and proteoglycan, etc.
[0043] The internal structure and materials of the fixation layer and fixation nails are not limited, as long as the fixation layer can withstand the physical impact of various joint activities...
Embodiment 2
[0060] Such as Image 6 and Figure 7 As shown, the difference from the first embodiment is that the body of this embodiment has a three-layer structure, specifically including a cartilage layer 3, a calcified layer 5, and a fixed layer 4. At this time, the calcified layer is a dense layer that connects the cartilage layer and fixes it. The role of the fixed layer, the fixed layer is a porous network structure, the porous network structure is easy to form a growth chamber, cartilage cells can enter the chamber to grow and proliferate, so that the body and articular cartilage are embedded and fixed. Better results.
[0061] In this embodiment, in order to improve the fixation effect, the calcified layer is connected to the cartilage layer and the fixation layer with special-shaped surfaces, and the special-shaped surfaces may be wave-shaped, tooth-shaped, or square-shaped. The shape of the joint surface between the calcification layer and the cartilage layer and the joint surface...
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