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Background: The main goal of this study was to evaluate postoperative changes in the length of the first metatarsal (M1) and the proximal phalanx of the hallux (P1) after acellular dermal allograft interpositional arthroplasty (ADA-IPA). We hypothesized that there would be a shortening of the first ray at the first metatarsal, the proximal phalanx, or both., Methods: In this retrospective study, we assessed patients who underwent ADA-IPA between 2019 and 2022. On standing anteroposterior (AP) foot radiographs, we measured first metatarsal (M1), second metatarsal (M2), proximal phalanx (P1), and the entire hallux (HX) lengths. M1/M2 and P1/HX ratios were calculated. The first metatarsophalangeal joint space was calculated. All measurements were recorded preoperatively, at 6 weeks postoperatively, and at final follow-up., Results: The pilot study included 11 patients. At final follow-up, we found shortening of M1 and P1 in comparison to the preoperative length, as evidenced by lower M1/M2 (82.6 ± 2.3 vs 75.4 ± 5.1; P  = .001) and P1/HX ratios (53.4 ± 2.3 vs 48.9 ± 7.9; P  = .001). Follow-up length was negatively correlated with M1/M2 ( r  = -0.76, P  = .003)., Conclusion: ADA-IPA might be associated with shortening of both first metatarsal and proximal phalanx, with the former showing progressive shortening., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. Disclosure forms for all authors are available online.

First metatarsophalangeal (MTP) joint fusion, or arthrodesis, has been a cornerstone treatment for advanced joint degeneration since the 1950s, benefiting not only older patients but also younger individuals. The procedure boasts favorable long-term outcomes and a low rate of revision when fusion is successful. However, complications such as interphalangeal arthritis may occur, and nonunion or malunion can necessitate revision. While the first MTP fusion provides significant relief, its applicability varies, underscoring the need for careful patient selection., Competing Interests: Disclosure M.E. Easley is a consultant for Paragon 28 and Treace Medical. A.S. Acker and J. Liles have no commercial or financial conflicts of interest related to this work., (Copyright © 2024 Elsevier Inc. All rights reserved.)

Hallux rigidus is a degenerative arthritic condition affecting the first metatarsophalangeal joint. Prevalence in patients aged 50 years and above is estimated at 20% to 30%, with a portion being symptomatic. Conservative treatment's efficacy is linked to initial pain levels; though shoe modifications and insoles are commonly recommended, their true effectiveness lacks strong evidence. Injection therapy, including corticosteroids and hyaluronic acid, demonstrates varied outcomes, with about 50% of patients undergoing surgery within 1 to 2 years. The condition's etiology remains elusive, but recent biomechanical hypotheses hold promise., Competing Interests: Disclosure The authors have no commercial or financial conflicts of interest related to this work. All pictures and x-rays are from Dr Hanselman’s records., (Copyright © 2023 Elsevier Inc. All rights reserved.)

Computer-assisted orthopaedic surgery (CAOS) is a real-time navigation guidance system that supports surgeons intraoperatively.Its use is reported to increase precision and facilitate less-invasive surgery.Advanced intraoperative imaging helps confirm that the initial aim of surgery has been achieved and allows for immediate adjustment when required.The complex anatomy of the foot and ankle, and the associated wide range of challenging procedures should benefit from the use of CAOS; however, reports on the topic are scarce.This article explores the fields of applications of real-time navigation and CAOS in foot and ankle surgery. Cite this article: EFORT Open Rev 2021;6:531-538. DOI: 10.1302/2058-5241.6.200024., Competing Interests: ICMJE Conflict of interest statement: The authors declares no conflict of interest relevant to this work., (© 2021 The author(s).)