Kishida Y, Sugano N, Nishii T, Miki H, Yamaguchi K, Yoshikawa H
Department of Orthopaedic Surgery, Osaka University Medical School, Suita, Osaka, Japan.
J Bone Joint Surg Br. 2004 Mar;86(2):185-9. doi: 10.1302/0301-620x.86b2.14338.
We investigated the effect of the Birmingham hip resurfacing (BHR) arthroplasty on the bone mineral density (BMD) of the femur. A comparative study was carried out on 26 hips in 25 patients. Group A consisted of 13 patients (13 hips) who had undergone resurfacing hip arthroplasty with the BHR system and group B of 12 patients (13 hips) who had had cementless total hip arthroplasty with a proximal circumferential plasma-spray titanium-coated anatomic Ti6A14V stem. Patients were matched for gender, state of disease and age at the time of surgery. The periprosthetic BMD of the femur was measured using dual-energy x-ray absorptiomentry of the Gruen zones at two years in patients in groups A and B. The median values of the BMD in zones 1 and 7 were 99% and 111%, respectively. The post-operative loss of the BMD in the proximal femur was significantly greater in group B than in group A. These findings show that the BHR system preserves the bone stock of the proximal femur after surgery.
我们研究了伯明翰髋关节表面置换术（BHR）对股骨骨密度（BMD）的影响。对25例患者的26个髋关节进行了一项对比研究。A组由13例患者（13个髋关节）组成，他们接受了使用BHR系统的髋关节表面置换术；B组由12例患者（13个髋关节）组成，他们接受了使用近端圆周等离子喷涂钛涂层解剖型Ti6A14V柄的非骨水泥全髋关节置换术。患者在手术时按性别、疾病状态和年龄进行匹配。在A组和B组患者中，术后两年使用双能X线吸收法测量Gruen分区的股骨假体周围骨密度。1区和7区骨密度的中位数分别为99%和111%。B组股骨近端骨密度的术后损失明显大于A组。这些发现表明，BHR系统在术后保留了股骨近端的骨量。
