Single lag-screw-augmented dorsal plating yields superior union and lower costs in first metatarsophalangeal arthrodesis.

Abstract

This study aimed to compare clinical outcomes and total treatment costs of 3 fixation strategies-isolated dorsal plating, dorsal plating with a single lag screw, and dorsal plating with dual lag screws-in patients undergoing first metatarsophalangeal (MTP) joint arthrodesis for advanced hallux rigidus.  Methods: This retrospective study included 99 patients who underwent primary first MTP joint arthrodesis between 2019 and 2024. Patients were categorized into Group 1 (dorsal plate only; n = 27), Group 2 (plate + 1 lag screw; n = 42), and Group 3 (plate + 2 lag screws; n = 30). Demographic variables, radiographic union, revision rates, functional outcomes (American Orthopaedic Foot and Ankle Society [AOFAS], Visual Analog Scale [VAS], Foot Function Index [FFI]), and total 12-month treatment costs were evaluated. The primary outcome measures were union rate, time to union, revision surgery, functional scores, and cumulative cost.  Results: Group 1 demonstrated significantly lower union rates compared with Groups 2 and 3 (88.9% vs. 100% for both; P = .027) and a longer mean time to union (75 days vs. 65.8 and 62 days, respectively; P = .001). Revision surgery was required only in Group 1 (11.1%). The AOFAS scores were significantly higher in the screw-augmented groups (P = .013), while VAS and FFI scores showed no between-group differences. Cost analysis identified Group 2 as the most cost-effective strategy (9500 ± 1100 TL ≈ $310 ± 36), compared with Group 1 (11 200 ± 1400 TL ≈ $365 ± 46, P = .021) and Group 3 (11 600 ± 1300 TL ≈ $378 ± 42, P = .038).  Conclusion: Single lag-screw augmentation of dorsal plate fixation provides superior union, fewer revisions, improved functional scores, and the lowest overall 12-month cost. These findings support dorsal plating with a single lag screw as a practical, value-based fixation strategy for advanced hallux rigidus, offering optimal clinical and economic outcomes.    Cite this article as: Kazez M, Batur ÖC, Önce G, Kürüm H, Kaya O, Yalın M. Single lag-screw-augmented dorsal plating yields superior union and lower costs in first metatarsophalangeal arthrodesis. Acta Orthop Traumatol Turc., 2026; 60(2), 0417, doi: 10.5152/j.aott.2025.25417.