Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia.
J Arthroplasty. 2013 Jan;28(1):103-9.e1. doi: 10.1016/j.arth.2012.06.016. Epub 2012 Oct 2.
The standard Exeter stem has a length of 150 mm with offsets 37.5 to 56 mm. Shorter stems of lengths 95, 115 and 125 mm with offsets 35.5 mm or less are available for patients with smaller femurs. Concern has been raised regarding the behavior of the smaller implants. This paper analyzed data from the Australian Orthopaedic Association National Joint Replacement Registry comparing survivorship of stems of offset 35.5 mm or less with the standard stems of 37.5 mm offset or greater. At 7 years, there was no significant difference in the cumulative percent revision rate in the short stems (3.4%, 95% CI 2.4-4.8%) compared with the standard length stems (3.5%, 95% CI 3.3-3.8%) despite its use in a greater proportion of potentially more difficult developmental dysplasia of the hip cases.
Exeter 标准柄的长度为 150mm，偏距为 37.5 至 56mm。对于股骨较小的患者，还有长度为 95、115 和 125mm 且偏距小于 35.5mm 的短柄可供选择。人们对较小植入物的行为表示担忧。本文分析了来自澳大利亚矫形协会国家关节置换登记处的数据，比较了偏距为 35.5mm 或更小的柄与偏距为 37.5mm 或更大的标准柄的存活率。7 年时，短柄（3.4%，95%CI2.4-4.8%）的累计翻修率与标准长度柄（3.5%，95%CI3.3-3.8%）相比无显著差异，尽管其在更多可能更具挑战性的发育性髋关节发育不良病例中使用。
