Nunag Perrico, Deakin Angela H, Oburu Ezekiel, Sarungi Martin
Department of Orthopaedics, Golden Jubilee National Hospital, Agamemnon Street, Clydebank, Dunbartonshire, UK.
Hip Int. 2012 Sep-Oct;22(5):511-5. doi: 10.5301/HIP.2012.9744.
We performed a radiologic assessment of the Trident Peripheral Self-Locking cup 2 years after implantation to assess early migration behaviour and to establish if incomplete postoperative seating correlated with early instability. A retrospective analysis of 30 cases was performed using EBRA. No cups had acetabular screws. Average total migration was 1.5 mm (range 0.1 to 5.9 mm). Seventeen showed total migration >1 mm and 7 of these showed further migration >2 mm (range 2.3 to 5.9 mm). Twenty cups demonstrated incomplete seating on initial post-operative radiographs (mean 1.4 mm, range 0.3 to 3.0). No relationship between incomplete seating and migration was identified (p = 0.86). The majority of gaps consolidated at differing times within the 2 year period. Oxford Hip scores showed significant improvement after surgery (p = 0.001) and this was independent of migration (p = 0.76). At 5 years there were no revisions for aseptic loosening.
The majority of the cups demonstrated early radiographic instability, and this was not related to incomplete seating. Five year functional outcome appears good and independent of migration and initial seating.
我们在三叉戟外周自锁髋臼杯植入2年后进行了影像学评估，以评估早期移位行为，并确定术后就位不完全是否与早期不稳定相关。使用EBRA对30例病例进行了回顾性分析。所有髋臼杯均未使用髋臼螺钉。平均总移位为1.5毫米（范围为0.1至5.9毫米）。17例显示总移位>1毫米，其中7例显示进一步移位>2毫米（范围为2.3至5.9毫米）。20个髋臼杯在术后初始X线片上显示就位不完全（平均1.4毫米，范围为0.3至3.0）。未发现就位不完全与移位之间存在关联（p = 0.86）。在2年期间，大多数间隙在不同时间愈合。牛津髋关节评分显示术后有显著改善（p = 0.001），且这与移位无关（p = 0.76）。5年时没有因无菌性松动而进行翻修的病例。
大多数髋臼杯显示早期影像学不稳定，且这与就位不完全无关。5年功能结果似乎良好，与移位和初始就位无关。
