Purpose: The primary purpose of this systematic review and meta-analysis was to investigate the impact of prior arthroscopy on postoperative revisions, complications, and other clinical outcomes after conversion total lower extremity arthroplasty.
Methods: Two individual researchers conducted the platform searches on the Embase, PubMed, Cochrane Central, and Google Scholar electronic databases from inception to June 02, 2021. We identified cohort trials that compared the outcomes of patients who underwent primary THA or TKA in the prior arthroscopy or control groups. The primary outcome was revision, and secondary outcomes included reoperation, patient-reported outcomes, and postoperative complications. A modified version of the Downs and Black tool was used to assess the methodological quality of the non-randomized cohort studies.
Results: Of the 23 included studies with 319946 cases, 18 were matched retrospectively and five were non-matched retrospectively. Methodological quality was high in ten studies and moderate in thirteen studies. Our analysis demonstrated that TKA or THA patients with prior arthroscopy were associated with an increased risk of revision, reoperation, infection, and aseptic loosening. THA patients with prior arthroscopy were also associated with an increased risk of dislocation. Furthermore, there were no significant intergroup differences in periprosthetic fracture, range of motion, Harris Hip Score, or Knee Society Score.
Conclusion: Arthroscopy performed before total lower extremity arthroplasty substantially increased the revision, reoperation, infection, and aseptic loosening rates. THA patients with prior arthroscopy were also associated with an increased risk of dislocation. Patients should be counseled on the potential increased risks associated with conversion total lower extremity arthroplasty after prior arthroscopy. Further research is needed to better characterize these findings.
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