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. 2022 Mar;142(3):511-515.
doi: 10.1007/s00402-021-03922-z. Epub 2021 May 9.

Arthrofibrosis following primary total hip arthroplasty: a distinct clinical entity

Thorsten Gehrke #  1 , Lara Althaus #  1 , Philip Linke  1 , Jochen Salber  2 , Veit Krenn  3 , Mustafa Citak  4
Affiliations

Arthrofibrosis following primary total hip arthroplasty: a distinct clinical entity

Thorsten Gehrke et al. Arch Orthop Trauma Surg. 2022 Mar.

Abstract

Introduction: Arthrofibrosis is a relatively frequent complication after total knee arthroplasty. Although stiffness after total hip arthroplasty (THA), because of formation of heterotopic ossification or other causes, is not uncommon, to the authors' best knowledge, arthrofibrosis after THA has not been described. The aim of this study is to describe the arthrofibrosis of the hip after primary THA using an established clinical and histological classification of arthrofibrosis.

Materials and methods: We retrospectively examined all patients who were histologically confirmed to have arthrofibrosis after primary THA during revision surgery by examination of tissue samples in our clinic. Arthrofibrosis was diagnosed according to the histopathological SLIM-consensus classification, which defines seven different SLIM types of the periimplant synovial membrane. The SLIM type V determines the diagnosis of endoprosthesis-associated arthrofibrosis.

Results: The study population consists of 66 patients who were revised due to arthrofibrosis after primary THA. All patients had a limitation in range of motion prior to revision with a mean flexion of 90° (range from 40 to 125), mean internal rotation of 10° (range from 0 to 40) and mean external rotation of 20° (range from 0 to 50). All patients had histological SLIM type V arthrofibrosis, corresponding to endoprosthesis-associated arthrofibrosis. Histological examination revealed that seven patients (10.6%) had particle-induced and 59 patients (89.4%) had non-particle-induced arthrofibrosis.

Conclusion: This is the first description of endoprosthetic-associated arthrofibrosis after primary THA on the basis of a well-established histological classification. Our study results could enable new therapeutic and diagnostic opportunities in patients with such an arthrofibrosis. Surgeons should keep arthrofibrosis as a possible cause for stiffness and pain after primary THA in mind.

Level of evidence: Diagnostic study, Level of Evidence IV.

Keywords: Arthrofibrosis; Complications; Revision arthroplasty; Total hip arthroplasty.

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