Purpose: Patients affected by moderate to severe hallux rigidus may opt for interposition arthroplasty to avoid the movement restrictions of arthrodesis and the complications related to prosthetic replacement. The propose of this article was to review the current literature about interposition arthroplasty to examine the overall outcomes and to evaluate the advantages and disadvantages of different types of technique, compared with more consolidated procedures. Methods: A literature PubMed search was performed. Studies reporting the results of interposition arthroplasty in moderate to severe hallux rigidus were included. The data were pooled and weighted for number of patients in every study. Results: The overall results for interposition arthroplasties are comparable to other alternatives for end-stage hallux rigidus, providing better plantar load distribution than arthrodesis and avoiding the drawbacks of prosthetic replacement. Among the various interposition arthroplasty techniques, the Modified Oblique Keller Capsular Interposition Arthroplasty technique preserves toe length and flexor hallucis brevis function, showing the highest satisfaction rate, with lowest metatarsalgia and revision rate. Conclusion: Although long-term randomized controlled trials are lacking for interposition arthroplasty, it represents a valid alternative for the treatment of end-stage hallux rigidus also in the young active patient who wants to avoid a definitive intervention immediately. Level of evidence: III (systematic review of level III-IV-V studies).
Interposition Arthroplasty in the Treatment of End-Stage Hallux Rigidus: A Systematic Review / Di Caprio, F.; Mosca, M.; Ceccarelli, F.; Caravelli, S.; Di Ponte, M.; Zaffagnini, S.; Ponziani, L.. - In: FOOT & ANKLE SPECIALIST. - ISSN 1938-6400. - (2021), p. 19386400211053947. [10.1177/19386400211053947]
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