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<p>Bearing fracture is a&#xa0;rare complication which can occur after mobile-bearing unicompartmental knee arthroplasty (UKA). Unspecific clinical and radiological signs make it difficult to diagnose. In this case series, 6&#xa0;patients with mobile bearing fracture after UKA implantation are presented and important diagnostic aspects are highlighted. Radiological images of each case are analyzed. Furthermore, characteristics of each patient including age, gender, body mass index (BMI), component size, type of revision operation, time between primary implantation and bearing fracture are examined. Three patients had a&#xa0;body mass index (BMI) higher than&#xa0;30. In 4&#xa0;of the 6&#xa0;patients, fractured bearing size was 3 mm. In 5&#xa0;patients, bearing exchange was carried out. In 1&#xa0;patient, revision to total knee arthroplasty (TKA) was carried out since there was loosening of the tibial component. In conclusion, bearing fracture should always be suspected as a differential diagnosis and extensive diagnostics should be initiated if a&#xa0;patient presents with sudden pop or pain in an operated knee after mobile-bearing UKA implantation.</p>

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Bruch des mobilen Inlays

  • 期刊论文

  • 发表日期：

    2025年1月20日

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  • M. Canberk Göktepe,
  • Jürgen Martin,
  • Guido Mohr,
  • Michael Clarius

摘要

Bearing fracture is a rare complication which can occur after mobile-bearing unicompartmental knee arthroplasty (UKA). Unspecific clinical and radiological signs make it difficult to diagnose. In this case series, 6 patients with mobile bearing fracture after UKA implantation are presented and important diagnostic aspects are highlighted. Radiological images of each case are analyzed. Furthermore, characteristics of each patient including age, gender, body mass index (BMI), component size, type of revision operation, time between primary implantation and bearing fracture are examined. Three patients had a body mass index (BMI) higher than 30. In 4 of the 6 patients, fractured bearing size was 3 mm. In 5 patients, bearing exchange was carried out. In 1 patient, revision to total knee arthroplasty (TKA) was carried out since there was loosening of the tibial component. In conclusion, bearing fracture should always be suspected as a differential diagnosis and extensive diagnostics should be initiated if a patient presents with sudden pop or pain in an operated knee after mobile-bearing UKA implantation.