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Related Experiment Video

Updated: May 22, 2025

An Anatomical Study of Nerves at Risk During Minimally Invasive Hallux Valgus Surgery
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Does Use of Allograft Affect Union Rates in Minimal Invasive Hallux Valgus Surgery?

Christian G Guevara1, Dino Fanfan1, Taylor Schnepp2

  • 1Florida International University Herbert Wertheim College of Medicine, Miami, FL, USA.

Foot & Ankle International
|May 20, 2025
PubMed
Summary

This study found that using allograft in minimally invasive surgery (MIS) for hallux valgus (HV) correction did not significantly improve union rates or time to union compared to traditional MIS techniques. Routine allograft use may not offer substantial benefits for HV MIS procedures.

Keywords:
allograftbone graftbunionhallux valgusminimally invasiveunion

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Area of Science:

  • Orthopaedic Surgery
  • Foot and Ankle Procedures
  • Minimally Invasive Surgery (MIS)

Background:

  • Hallux valgus (HV) is a prevalent foot deformity causing discomfort.
  • Minimally invasive surgery (MIS) is increasingly adopted for HV correction.
  • Allograft use in open surgery aims to expedite bone union.

Purpose of the Study:

  • To evaluate the impact of allograft use on time to union and union rates in MIS hallux valgus correction.
  • To compare radiographic outcomes of MIS HV correction with and without allograft.

Main Methods:

  • Retrospective cohort study of 68 patients undergoing primary MIS hallux valgus correction.
  • Comparison between patients receiving demineralized bone matrix (DBM) allograft gel and a control group.
  • Radiographic evaluation for union, defined by neocortex formation, and assessment of surgical correction and complications.

Main Results:

  • All 68 patients achieved complete union, with no malunions or nonunions observed in either group.
  • Average time to union was 5.69 months (allograft) vs. 6.0 months (control), with no statistically significant difference (P=.731).
  • Surgical correction was maintained in all patients, and secondary outcomes were comparable.

Conclusions:

  • Demineralized bone matrix allograft did not yield a statistically significant difference in time to union or union rates for MIS HV correction.
  • The observed slight decrease in average union time with allograft was not clinically or statistically significant.
  • Routine use of allograft in MIS hallux valgus correction may not provide a meaningful benefit.