Comparison of Radiographic Measurements Before and After Triplane Tarsometatarsal Arthrodesis for Hallux Valgus.

Abstract

We present a comparison of preoperative and final postoperative first ray measurements in 109 feet after triplane tarsometatarsal arthrodesis at a mean follow-up time of 17.4 months. Preoperative and final postoperative first ray variables including intermetatarsal angle (IMA), hallux valgus angle (HVA), tibial sesamoid position (TSP), distal metatarsal articular angle (DMAA), Seiberg index, metatarsal rotation angle (MRA), sesamoid subluxation, osseous union, and hardware failure were evaluated. Measurements were made by consistently using the mid-diaphyseal line of the bone segments for both preoperative and postoperative assessments. The mean preoperative HVA, IMA, and TSP were 22.9°, 13.3°, and 4.6. The mean differences (95% confidence interval) in preoperative and postoperative values were -14.9° (-16.3° to -13.4°) for HVA, -7.7° (-8.2° to -7.2°) for IMA, and -2.6 (-2.8 to -2.3) for TSP. Among bunions with MRA measurements, the mean difference was -12.3° (-14.5° to -10.0°). The preoperative to postoperative DMAA decreased by a mean of -14.2° (-15.9° to -12.6°). The results of this study suggest that triplane tarsometatarsal arthrodesis produces appropriate correction of hallux valgus radiographic parameters.

• Authors: Paul Dayton, Stefany Carvalho, Rachel Egdorf, Mindi Dayton
• Journal: The Journal of foot and ankle surgery : official publication of the American College of Foot and Ankle Surgeons (J Foot Ankle Surg) 2020 Mar - Apr Vol. 59 Issue 2 Pg. 291-297 ISSN: 1542-2224 [Electronic] United States
• PMID: 32130993 (Publication Type: Comparative Study, Journal Article)
• Copyright: Copyright © 2019 the American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.

Topics

• Adult
• Arthrodesis (methods)
• Female
• Follow-Up Studies
• Hallux Valgus (diagnosis, physiopathology, surgery)
• Humans
• Male
• Metatarsophalangeal Joint (diagnostic imaging, physiopathology, surgery)
• Radiography (methods)
• Range of Motion, Articular (physiology)
• Recurrence
• Retrospective Studies