Abstract：
As instability continues to be a burden post-total hip arthroplasty (THA), there has been a controversial discussion on the ideal implant choice. We report the outcomes of a modern constrained acetabular liner (CAL) system in primary and revision THA at an average follow-up of 2.4 years.
We performed a retrospective study of all patients undergoing primary and revision hip arthroplasty and being implanted with the modern CAL system from 2013 to 2021. We identified 31 hips, of which 13 underwent primary THA and the remaining 18 underwent revision THA for instability.
Of those implanted with CAL primarily, 3 had concomitant abductor tear repair and gluteus maximus transfer, 5 had Parkinson\'s disease, 2 had inclusion body myositis, 1 had amyotrophic lateral sclerosis, and the remaining two were over 94 years of age. All patients implanted with the CAL had active instability post-primary THA and underwent only liner and head exchange without revision of the acetabular or femoral components. At an average follow-up of 2.4 years (ranging from 9 months to 5 years and 4 months), we had 1 case (3.2%) of dislocation post-CAL implantation. None of the patients undergoing surgery with CAL for active instability had a redislocation.
In conclusion, a CAL provides excellent stability in both primary THA in high-risk individuals and revision THA in cases of active instability. There were no dislocations when using a CAL to treat active instability post-THA.
We performed a retrospective study of all patients undergoing primary and revision hip arthroplasty and being implanted with the modern CAL system from 2013 to 2021. We identified 31 hips, of which 13 underwent primary THA and the remaining 18 underwent revision THA for instability.
Of those implanted with CAL primarily, 3 had concomitant abductor tear repair and gluteus maximus transfer, 5 had Parkinson\'s disease, 2 had inclusion body myositis, 1 had amyotrophic lateral sclerosis, and the remaining two were over 94 years of age. All patients implanted with the CAL had active instability post-primary THA and underwent only liner and head exchange without revision of the acetabular or femoral components. At an average follow-up of 2.4 years (ranging from 9 months to 5 years and 4 months), we had 1 case (3.2%) of dislocation post-CAL implantation. None of the patients undergoing surgery with CAL for active instability had a redislocation.
In conclusion, a CAL provides excellent stability in both primary THA in high-risk individuals and revision THA in cases of active instability. There were no dislocations when using a CAL to treat active instability post-THA.
摘要：
背景：由于不稳定仍然是全髋关节置换术（THA）后的负担，关于理想的植入物选择有争议的讨论。我们在这里报告了现代约束髋臼衬垫（CAL）系统在初级和修订THA中的平均随访2.4年的结果。
方法：我们对2013年至2021年进行初次和翻修髋关节置换术并植入现代CAL系统的所有患者进行了回顾性研究。我们确认了31个臀部,其中13例接受了原发性THA,其余18例因不稳定而接受了修正性THA.
结果：在主要植入CAL的患者中，3例伴有外展撕裂修复和臀大肌转移，5人患有帕金森病，2有包涵体肌炎，1人患有肌萎缩侧索硬化症，其余2人年龄在94岁以上。所有植入CAL的患者都是原发性THA后活动性不稳定的结果，并且仅进行了衬垫和头部交换，而没有翻修髋臼或股骨组件。平均随访2.4年(范围，9个月至5年零4个月)，我们有1例(3.2%)CAL植入后脱位。因活动性不稳定而接受CAL手术的患者均未再脱位。
结论：结论：约束髋臼衬垫在高危个体的原发性THA和活动性不稳定情况下的翻修THA中均具有出色的稳定性.使用约束髋臼衬垫治疗THA后的活动性不稳定性时，没有脱位。
方法：我们对2013年至2021年进行初次和翻修髋关节置换术并植入现代CAL系统的所有患者进行了回顾性研究。我们确认了31个臀部,其中13例接受了原发性THA,其余18例因不稳定而接受了修正性THA.
结果：在主要植入CAL的患者中，3例伴有外展撕裂修复和臀大肌转移，5人患有帕金森病，2有包涵体肌炎，1人患有肌萎缩侧索硬化症，其余2人年龄在94岁以上。所有植入CAL的患者都是原发性THA后活动性不稳定的结果，并且仅进行了衬垫和头部交换，而没有翻修髋臼或股骨组件。平均随访2.4年(范围，9个月至5年零4个月)，我们有1例(3.2%)CAL植入后脱位。因活动性不稳定而接受CAL手术的患者均未再脱位。
结论：结论：约束髋臼衬垫在高危个体的原发性THA和活动性不稳定情况下的翻修THA中均具有出色的稳定性.使用约束髋臼衬垫治疗THA后的活动性不稳定性时，没有脱位。
