Department of Orthopaedic Surgery, Friedrich-Alexander-University of Erlangen-Nuremberg, Rathsberger Strasse 57, Erlangen, Germany.
J Bone Joint Surg Am. 2011 Jun 15;93(12):1152-7. doi: 10.2106/JBJS.J.01097.
As a follow-up of a previously reported three-year study, we analyzed the periprosthetic acetabular cortical and cancellous bone density changes at ten years after implantation of a press-fit cup.
Prospective clinical, radiographic, and quantitative computed tomography examinations were performed within ten days and at mean periods of one, three, and ten years after total hip arthroplasty with a press-fit cup, a femoral stem with a tapered design, and alumina-alumina pairing. Periacetabular cortical and cancellous bone density (mg CaHA/mL) in the cranial, ventral, and dorsal regions about the cup were measured for twenty-four hips in vivo.
All acetabular cups showed radiographic signs of stable ingrowth, and no acetabular component had to be revised. The loss of periacetabular cancellous bone density about the cup was as much as -37% cranially, -60% ventrally, and -71% dorsally; the decrease was progressive between the one-year and three-year examinations only. In contrast, cortical bone density above the dome of the acetabular cup remained constant throughout the ten-year follow-up. A moderate change in cortical bone density of -5% to -18% was seen at the level of the cup ten years postoperatively.
Both periacetabular cortical and cancellous bone density changes were nonprogressive between the three-year and ten-year examinations after press-fit cup fixation.
作为之前一项为期三年研究的后续，我们分析了压配杯植入十年后髋臼周围皮质骨和松质骨密度的变化。
在全髋关节置换术后 10 天内，以及 1、3 和 10 年时，对采用压配杯、锥形设计股骨柄和氧化铝-氧化铝配对的 24 髋进行前瞻性临床、放射学和定量计算机断层扫描检查。对髋臼周围杯头、腹侧和背侧皮质骨和松质骨密度（mg CaHA/mL）进行了活体测量。
所有髋臼杯均显示出稳定植入的放射学迹象，没有髋臼部件需要修正。髋臼周围松质骨密度的丢失量分别为头侧-37%、腹侧-60%和背侧-71%；仅在 1 年和 3 年检查之间逐渐减少。相比之下，髋臼杯穹顶上方的皮质骨密度在十年随访期间保持不变。术后 10 年，在杯水平处可见皮质骨密度中度变化，为-5%至-18%。
在压配杯固定后，三年和十年检查之间，髋臼周围皮质骨和松质骨密度变化没有进展。
