Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, 676 N St Clair, Suite 1350, Chicago, IL 60611, USA.
Clin Orthop Relat Res. 2011 Feb;469(2):382-6. doi: 10.1007/s11999-010-1500-8.
Aseptic osteolysis has been the single most important factor limiting the longevity of a THA. A great deal of attention has been focused on the development of implants and materials that minimize the development of osteolysis. The monoblock porous tantalum acetabular cup was designed to minimize osteolysis, but whether it does so is unclear.
QUESTIONS/PURPOSES: We evaluated the incidence of osteolytic lesions after THA using a monoblock porous tantalum acetabular component.
We retrospectively reviewed 51 patients who had a THA using a monoblock porous tantalum acetabular cup. At a minimum of 9.6 years postoperatively (average, 10.3 years; SD, 0.2 years; range, 9.6-10.8 years), a helical CT scan of the pelvis using a metal suppression protocol was obtained. This scan was evaluated for the presence of osteolysis.
We found no evidence of osteolysis on CT scan at an average of 10.3 years.
Osteolysis appears not to be a major problem at 10 years with this monoblock porous tantalum acetabular component, but longer term followup will be required to determine whether these findings persist.
Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
无菌性骨溶解一直是限制髋关节置换术（THA）使用寿命的最重要因素。人们非常关注开发能够最小化骨溶解发生的植入物和材料。整体多孔钽髋臼杯的设计旨在最小化骨溶解，但目前尚不清楚其是否如此。
问题/目的：我们评估了使用整体多孔钽髋臼组件进行 THA 后的溶骨病变发生率。
我们回顾性分析了 51 例使用整体多孔钽髋臼杯进行 THA 的患者。术后至少 9.6 年（平均 10.3 年；标准差 0.2 年；范围 9.6-10.8 年），使用金属抑制协议对骨盆进行螺旋 CT 扫描。对 CT 扫描评估是否存在溶骨。
我们在平均 10.3 年时的 CT 扫描上没有发现溶骨的证据。
在 10 年时，这种整体多孔钽髋臼组件似乎没有出现明显的骨溶解问题，但需要更长时间的随访才能确定这些发现是否持续存在。
IV 级，治疗研究。有关证据水平的完整描述，请参见作者指南。
