Murray Nicholas J, Al-Hourani Khalid, Crowther Mark Aa, Sarangi Partha P, McCann Philip A
Department of Trauma and Orthopaedics, North Bristol NHS Foundation Trust, Bristol, UK.
Shoulder Elbow. 2021 Jun;13(3):283-289. doi: 10.1177/1758573219901122. Epub 2020 Mar 13.
Total shoulder arthroplasty is an established treatment with the commonest cause of failure loosening of the glenoid component. Hydroxyapatite metal-backed glenoid components could offer better survivorship due to improved fixation. The aim of this study was to investigate periprosthetic radiolucency rates associated with an uncemented, metal-backed polyethylene glenoid component with medium-term results.
A single centre retrospective study examining radiological outcomes of the Epoca metal-backed glenoid component. Radiographs were analysed for post-operative adequacy of glenoid seating and radiographs at follow-up assessed for periprosthetic lucencies and any revision procedures were recorded.
Forty-one patients were followed up with a mean follow-up time of 5.5 years (3-8 years). Primary indication for total shoulder arthroplasty was osteoarthritis (80%). Mean age was 69 years (53-86 years). Ninety-five per cent of glenoid components were completely seated. At follow-up six patients had undergone revision (14.6%). Thirty of the remaining patients (86%) did not demonstrate any radiolucency on follow-up radiographs. Complete glenoid seating post-operatively was associated with lower rate of subsequent radiolucency and revision (P < 0.01).
Low rates of radiolucency at medium-term follow-up with an uncemented metal-backed glenoid, however significant rates of revision. Complete seating of the glenoid component was associated with lower rates of radiolucency and revision.
全肩关节置换术是一种成熟的治疗方法，最常见的失败原因是关节盂组件松动。羟基磷灰石金属背衬关节盂组件由于固定改善，可能具有更好的生存率。本研究的目的是调查与非骨水泥型、金属背衬聚乙烯关节盂组件相关的假体周围透亮率，并得出中期结果。
一项单中心回顾性研究，检查Epoca金属背衬关节盂组件的放射学结果。分析X线片以评估关节盂植入术后的情况，并在随访时评估X线片上的假体周围透亮情况，并记录任何翻修手术。
41例患者接受随访，平均随访时间为5.5年（3 - 8年）。全肩关节置换术的主要指征是骨关节炎（80%）。平均年龄为69岁（53 - 86岁）。95%的关节盂组件完全就位。随访时6例患者进行了翻修（14.6%）。其余30例患者（86%）在随访X线片上未显示任何透亮。术后关节盂完全就位与随后较低的透亮率和翻修率相关（P < 0.01）。
非骨水泥金属背衬关节盂在中期随访时透亮率较低，但翻修率较高。关节盂组件完全就位与较低的透亮率和翻修率相关。
