Niinimäki T, Puranen J, Jalovaara P
Department of Surgery, University Hospital, Oulu, Finland.
J Bone Joint Surg Br. 1994 May;76(3):413-8.
From 1983 to 1985 we performed 114 primary hip replacements in 108 consecutive osteoarthritic patients using a non-cemented RM isoelastic femoral stem. After a mean follow-up of 8.2 years, ten patients had died, 11 hips had been revised, six patients had been lost to follow-up and two had been excluded due to severe general illnesses. Of 85 arthroplasties (in 79 patients) 14 could not be assessed because of other illness or disability. The 71 remaining were reviewed by questionnaire and radiography; an excellent or good overall functional result was found in 31, 16 were fair and 24 were poor. Radiographically, 21 of 71 stems were judged to be loose and ten showed osteolytic foci, six of these without obvious loosening. We conclude that the isoelastic RM stem shows a high rate of loosening, but that this is not always associated with a poor subjective result. Regular radiographic review is necessary. The results are worse than those reported for other uncemented stems and for cemented stems.
1983年至1985年期间，我们使用非骨水泥型RM等弹性股骨柄为108例连续性骨关节炎患者进行了114例初次髋关节置换术。平均随访8.2年后，10例患者死亡，11髋进行了翻修，6例患者失访，2例因严重全身性疾病被排除。在85例关节成形术（79例患者）中，14例因其他疾病或残疾无法评估。其余71例通过问卷调查和X线检查进行评估；结果显示，31例总体功能结果为优或良，16例为尚可，24例为差。X线检查显示，71个股骨柄中有21例被判定为松动，10例出现骨质溶解灶，其中6例无明显松动。我们得出结论，等弹性RM股骨柄松动率较高，但这并不总是与较差的主观结果相关。定期进行X线复查很有必要。其结果比其他非骨水泥型股骨柄和骨水泥型股骨柄报道的结果更差。
