新鲜和深低温冷冻同种异体骨软骨移植长期转归实验研究  

Experimental study on the long-term conversion of fresh and cryopreserved osteochondral allografts after transplantation

作　　者：扈延龄[1] 王成琪[2] 王昌德[2] 叶发刚[1] 陶昊[1] 

机构地区：[1]青岛大学医学院附属医院创伤外科,山东青岛266000 [2]解放军第89医院骨科研究所,山东潍坊261021

出　　处：《中国矫形外科杂志》2010年第11期928-931,共4页Orthopedic Journal of China

摘　　要：[目的]观察和比较新鲜和深低温冷冻同种异体骨软骨移植后的长期转归情况,为同种异体骨软骨移植治疗关节软骨缺损进一步提供理论基础。[方法]建立兔膝关节软骨缺损模型,行新鲜和深低温冷冻同种异体骨软骨移植。在术后12个月和18个月,骨软骨移植物取材进行关节软骨蛋白多糖、软骨细胞活性检测和软骨细胞超微结构观察。[结果]新鲜和冷冻骨软骨移植物中蛋白多糖阿尔新蓝染色强度和存活软骨细胞比率术后均下降,且在各时间点新鲜移植组的结果优于冷冻移植组,有统计学差异(P<0.05)。超微结构显示软骨细胞退行性改变。[结论]新鲜和深低温冷冻同种异体骨软骨在移植术后较长时间均出现严重退变,冷冻骨软骨移植物退变较严重,其作为关节软骨缺损治疗方法目前是不可行的。[Objective]To compare long-term conversion between fresh and cryopreserved osteochondral allografts in order to further provide theoretical foundation for treatment of articular cartilage defect using osteochondral allografts. [Methods]Articular cartilage defect models of 5 mm in diameter and depth were established for 32 New Zealand rabbit’s knees and treated by fresh and cryopreserved osteochondral allografts. Allografts were harvested and assessed by observing and analysing proteoglycan content,chondrocyte viability and ultrastructure of articular cartilage using Alcianblue staining and BCECF-AM /PI fluorescent staining,respectively,at 12 and 18 months postoperatively.[Results]Proteoglycan content and percentage of viable chondrocytes of osteochondral allografts were obviously decreased.Results of fresh osteochondral allografts were significantly better than those of cryopreserved osteochondral allografts at different time points. Ultrastructure of chondrocytes demonstrated degenerative changes.[Conclusion]In treatment of artificial articular cartilage defect ,serious degenerative changes were found for both fresh and cryopreserved osteochondral allografts at a long period,suggesting that fresh,especially cryopreserved osteochondral allografts are not feasible to treat articular cartilage defect.

关 键 词：同种异体移植 骨软骨 深低温冷冻 

分 类 号：R687.3[医药卫生—骨科学]