Division of Orthopaedics, Department of Surgery, University of Toronto, Toronto, Ontario, Canada.
J Arthroplasty. 2013 Feb;28(2):368-73. doi: 10.1016/j.arth.2012.02.017. Epub 2012 Apr 30.
This study examined changes in femoral cortical porosity resulting from femoral canal preparation during cemented total hip arthroplasty (THA). Twenty-four canines were randomly assigned to 3 groups: (1) reaming only, (2) cementing without pressurization, and (3) cementing with pressurization. Femoral cortical porosity was measured from histologic samples of the femurs at 7 positions. Reaming during canal preparation significantly increased cortical porosity. Cementing further increased cortical porosity, whereas pressurization of cement helped to counteract the increase in cortical porosity caused by cementing alone. Cortical porosity was considered to be a marker for bone mineral density (BMD) during the early phase of peri-implant healing around cemented stems. To maximize bone mineral density after cemented total hip arthroplasty, we suggest using implants that do not require reaming and pressurizing cement appropriately.
本研究旨在探讨在骨水泥全髋关节置换术（THA）中进行股骨髓腔准备时股骨皮质孔隙率的变化。24 只犬随机分为 3 组：（1）仅扩髓，（2）无加压骨水泥填充，（3）加压骨水泥填充。通过对股骨 7 个位置的组织样本进行测量，评估股骨皮质孔隙率。髓腔准备过程中的扩髓显著增加了皮质孔隙率。骨水泥填充进一步增加了皮质孔隙率，而骨水泥的加压有助于抵消单独骨水泥填充引起的皮质孔隙率增加。皮质孔隙率被认为是骨水泥柄周围种植体早期愈合过程中骨矿物质密度（BMD）的标志物。为了在骨水泥全髋关节置换术后最大限度地提高骨矿物质密度，我们建议使用不需要扩髓和适当加压骨水泥的植入物。
