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首页> 外文期刊>International Journal of Surgery Case Reports >Dual mobility acetabular construct with freedom constrained liner for treatment of recurrent dislocations after total hip arthroplasty: A case report and literature review
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Dual mobility acetabular construct with freedom constrained liner for treatment of recurrent dislocations after total hip arthroplasty: A case report and literature review

机译：自由约束衬里的双迁移率髋臼构建体用于治疗总髋关节置换术后复发脱位：案例报告和文献综述

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Introduction Recurrent dislocation after total hip arthroplasty (THA) using the dual mobility cup system can present challenges, while dual-mobility THA bearings can improve stability in both primary and revision total hip arthroplasties. Presentation of case A 72-year-old woman with a history of schizophrenia underwent a left primary THA using the G7 dual mobility system. Two postoperative posterior dislocations occurred within 2 months post-surgery. The patient underwent revision surgery in which the metal liner and dual mobility head were exchanged using the Freedom constrained liner system without revision of the cup and stem. As of this writing, 28 months after the revision surgery, no further dislocations have occurred. The implants are stable, and the patient has good range of motion. Discussion Dual-mobility bearings are utilized to improve stability in both primary and revision total hip arthroplasties, but even if the dual mobility system is chosen, it sometimes fails to prevent postoperative dislocation. Although a relatively high failure rate has been reported in THA using the constrained liner system, this patient’s clinical course suggests that the G7 Freedom constrained liner system can be an efficacious option for some patients with unstable hip joints who undergo THA using the dual mobility system. Conclusion A modern constrained liner system such as the G7 Freedom liner may provide an improved salvage solution for joint instability in dual mobility THA.
机译：引入使用双迁移率杯系统的总髋关节关节术（THA）后的复发脱位可能存在挑战，而双迁移率THA轴承可以提高初级和修订总髋关节塑造术中的稳定性。案例提出了一个72岁的女性，具有精神分裂症史的历史，使用G7双移动系统接受了左初级THA。两种术后后脱位发生在手术后2个月内。患者接受了修改手术，其中使用自由约束的衬里系统更换金属衬里和双移动头，而无需修改杯和茎。截至本文的写作，修改手术后28个月，没有发生任何进一步的脱位。植入物是稳定的，患者具有良好的运动范围。讨论双迁移轴承用于提高初级和修订总髋关节塑化术中的稳定性，但即使选择了双行动系统，它有时也无法防止术后脱位。尽管使用受约束的衬里系统报告了相对较高的故障率，但该患者的临床课程表明G7自由度约束衬里系统对于一些不稳定的髋关节患者的患者可以使用双移动系统进行患者的有效选择。结论诸如G7自由衬里的现代受约束衬里系统可以提供改进的挽救施用解决方案，用于在双迁移率THA中的关节不稳定性。

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