Catastrophic Trunnion Failure in an Anatomic Titanium Alloy Stem.

IF 1.6 4区医学 Q4 GERIATRICS & GERONTOLOGY

Geriatric Orthopaedic Surgery & Rehabilitation Pub Date : 2022-11-28 eCollection Date: 2022-01-01 DOI:10.1177/21514593221142726

Benjamin P Pruitt, Simon C Mears, Andrew E Apple, Jeffrey B Stambough, C Lowry Barnes, Benjamin M Stronach

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引用次数: 0

Abstract

Introduction: Certain titanium alloy stems have been shown to be susceptible to failure at the neck with catastrophic trunnion failure. Failure has been particularly noted in the single wedge Accolade 1 stem design. Other stems also used this alloy including the anatomic designed Citation stem.

Methods: This case series details 3 catastrophic failures of the TMZF version of the Citation femoral stem.

Results: Each of these failures appear to be attributed to cyclical wear of the TMZF trunnion against the cobalt chromium femoral head. Wear resulted in ultimate implant failure and significant metal debris in the joint capsule at the time of revision surgery.

Discussion: While surgeons are aware of the risk of catastrophic failure for the Accolade 1 stem, failure may similarly happen in the TMZF Citation stem. Surgeons should monitor these implants with care and discuss the potential for trunnion failure with their patients.

Abstract Image

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解剖钛合金阀杆的灾难性耳轴失效。

引言:某些钛合金阀杆已被证明在颈部容易发生灾难性耳轴失效。单楔式Accolade 1阀杆设计尤其容易出现故障。其他阀杆也使用这种合金，包括解剖设计的引证阀杆。方法:本病例系列详细介绍了TMZF型引证股骨干的3例灾难性失效。结果:这些失败似乎都归因于TMZF耳轴对钴铬股骨头的周期性磨损。磨损导致假体最终失效，在翻修手术时关节囊内出现大量金属碎片。讨论:虽然外科医生意识到Accolade 1茎的灾难性失败的风险，但TMZF Citation茎也可能发生类似的失败。外科医生应仔细监测这些植入物，并与患者讨论耳轴失效的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geriatric Orthopaedic Surgery & Rehabilitation Medicine-Rehabilitation

CiteScore

3.00

自引率

0.00%

发文量

审稿时长

9 weeks

期刊介绍： Geriatric Orthopaedic Surgery & Rehabilitation (GOS) is an open access, peer-reviewed journal that provides clinical information concerning musculoskeletal conditions affecting the aging population. GOS focuses on care of geriatric orthopaedic patients and their subsequent rehabilitation. This journal is a member of the Committee on Publication Ethics (COPE).