Pain syndrome in patient after hip replacement with a dual-modular femoral component (case report)

Abstract

Total hip replacements with dualmodular femoral components (stemneck interface) allow optimization of hip joint biomechanics via selective restoration of femoral anteversion, offset, and limb length theoretically improving muscle function and stability. Potential disadvantages are the additional stemneck interface and the possible generation of metal ions and debris by fretting and crevice corrosion. The authors reported a case of patient with dualmodular stem presenting with pain and decreased function. Earlyonset adverse inflammatory tissue reactions developed as a result of corrosion at the stemneck interface of a dualmodular implant, requiring subsequent revision of wellfixed components with an extended trochanteric osteotomy. Additional examinations excluded infection. We consider that patients with a modular stem and neck junction and presenting with pain should be suspected on corrosion at the stemneck interface and adverse inflammatory tissue reaction after infection exclusion.

Keywords

• тотальное эндопротезирование тазобедренного сустава
• модульный бедренный компонент
• микроподвижность
• коррозия
• болевой синдром
• воспалительная реакция мягких тканей
• total hip replacement
• modular stem
• fretting
• corrosion
• adverse inflammatory tissue reaction