Massin P, Badelon O, Cavagna R, Bocquet L, Duparc J
Department of Orthopaedics, Bichat University Hospital, Paris, France.
Int Orthop. 1991;15(4):299-303. doi: 10.1007/BF00186865.
Fixation of smooth cementless femoral prostheses was studied in 16 dogs which were killed 2, 3 and 4 months after operation. Rotational stability, examined by hand, was good in 9 cases and all stable prostheses could be extracted. Five out of 6 dogs, who did not bear weight after the operation, had a stable prosthesis compared with 4 out of 10 who walked early. Histology showed close bone apposition in 4, tight fibrous encapsulation in 4 and lack of tissue apposition in 8 which were loose. Bone remodelling in radiographs reflected the histological appearances; narrow radiolucent spaces were associated with dense well organised fibrous tissue, and wide radiolucent spaces with loose connective tissue. Prostheses with stems which fill the femoral canal should improve the fixation of smooth cementless prostheses.
对16只狗进行了研究，观察无骨水泥光滑股骨假体的固定情况。这些狗在术后2、3和4个月时被处死。通过手动检查，9例旋转稳定性良好，所有稳定的假体均可取出。术后未负重的6只狗中有5只假体稳定，而早期行走的10只狗中有4只假体稳定。组织学检查显示，4只有紧密的骨附着，4只有紧密的纤维包裹，8只没有组织附着，假体松动。X线片上的骨重塑反映了组织学表现；狭窄的射线可透过间隙与致密有序的纤维组织相关，而宽的射线可透过间隙与疏松结缔组织相关。带有填充股骨髓腔柄的假体应能改善无骨水泥光滑假体的固定。
