Kim Min-Yook, Chung Young-Yool, Park Ji-Hoon, Lee Jung-Ho
Department of Orthopaedic Surgery, Kwangju Christian Hospital, Gwangju, Korea.
Hip Pelvis. 2015 Dec;27(4):216-22. doi: 10.5371/hp.2015.27.4.216. Epub 2015 Dec 30.
This retrospective study was performed to evaluate the clinical results and measure polyethylene liner wear in total hip arthroplasty (THA) with highly cross-linked polyethylene.
Except for patients who had died or were unable to have follow-up at least 2 years, 60 of 78 hips that underwent THA were included this study. The mean age was 64.5 years (range, 25-81 years) and the mean body mass index (BMI) was 23.0 kg/m(2) (18.1-32.3 kg/m(2)). Diagnosis at the time of the operation was osteonecrois of the femoral head in 28 hips, primary osteoarthritis in 14, hip fracture in 13, and other diseases in 5. The mean follow-up period was 3.8 years (2.1-7.1 years). Harris hip score (HHS) was reviewed before THA and at the last follow-up. On the anteroposterior pelvic radiographs, acetabular cup inclination and ante-version were also measured. The annual linear wear rate was measured using Livermore's method on the radiographs.
The mean HHS was 60.1 (28-94) before operation and 90.4 (47-100) at the last follow-up. In the immediate post-operation, the average inclination and anteversion angles of the acetabular cups were 46.3° (standard deviation, ±6.7°) and, 21.4°(±10.1°) respectively. The mean of the annual linear polyethylene wear was 0.079 mm/year (0.001-0.291 mm/year). Age, gender and BMI were not statistically related to linear polyethylene wear but the period of follow-up and the acetabular cup's inclination showed significant negative and positive correlation respectively.
The wear rate of a highly cross-linked polyethylene was shown to correlate negatively with duration of follow-up. However, our study was based on a short-term follow-up, so a long-term follow-up study is necessary in the future.
本回顾性研究旨在评估采用高交联聚乙烯的全髋关节置换术（THA）的临床效果并测量聚乙烯衬垫磨损情况。
除已死亡或无法进行至少2年随访的患者外，本研究纳入了78例接受THA手术的髋关节中的60例。平均年龄为64.5岁（范围25 - 81岁），平均体重指数（BMI）为23.0 kg/m²（18.1 - 32.3 kg/m²）。手术时的诊断为：28例股骨头坏死，14例原发性骨关节炎，13例髋部骨折，5例其他疾病。平均随访期为3.8年（2.1 - 7.1年）。在THA术前及末次随访时评估Harris髋关节评分（HHS）。在骨盆前后位X线片上，还测量髋臼杯的倾斜度和前倾角。使用利弗莫尔法在X线片上测量每年的线性磨损率。
术前平均HHS为60.1（28 - 94），末次随访时为90.4（47 - 100）。术后即刻，髋臼杯的平均倾斜角和前倾角分别为46.3°（标准差，±6.7°）和21.4°（±10.1°）。聚乙烯每年的平均线性磨损为0.079 mm/年（0.001 - 0.291 mm/年）。年龄、性别和BMI与聚乙烯线性磨损无统计学相关性，但随访时间和髋臼杯倾斜度分别显示出显著的负相关和正相关。
高交联聚乙烯的磨损率与随访时间呈负相关。然而，我们的研究基于短期随访，因此未来有必要进行长期随访研究。
