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Related Experiment Video

Updated: Aug 11, 2025

An Anatomical Study of Nerves at Risk During Minimally Invasive Hallux Valgus Surgery
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Radiographic Forefoot Width Following Minimally Invasive Chevron Akin Bunionectomy.

Derek M Klavas1, Dov L Rosemberg1,2,3,4,5, Glaucia Bordignon1,2,3,4,6

  • 1Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA.

Foot & Ankle Orthopaedics
|February 9, 2023
PubMed
Summary
This summary is machine-generated.

Minimally invasive chevron Akin (MICA) bunionectomy significantly reduces forefoot width in hallux valgus patients. This surgical approach leads to a modest decrease in both bony and soft tissue width, correlating with hallux valgus angle and intermetatarsal angle improvements.

Keywords:
MICAfoot widthhallux valgusminimally invasive surgery

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Area of Science:

  • Orthopedic surgery
  • Foot and ankle reconstruction
  • Minimally invasive surgical techniques

Background:

  • Hallux valgus (HV) is a prevalent forefoot condition causing pain and deformity.
  • Minimally invasive chevron Akin (MICA) bunionectomy offers potential benefits like reduced pain, swelling, and faster weight-bearing.
  • The impact of MICA on forefoot width remains an area requiring detailed investigation.

Purpose of the Study:

  • To evaluate the effect of the Minimally Invasive Chevron Akin (MICA) bunionectomy procedure on forefoot width.
  • To quantify changes in both bony and soft tissue forefoot dimensions post-MICA surgery.
  • To explore correlations between radiographic deformity correction and forefoot width reduction.

Main Methods:

  • Retrospective review of 28 patients undergoing primary MICA for hallux valgus.
  • Pre- and postoperative radiographic measurements included hallux valgus angle (HVA), intermetatarsal angle (IMA), distal metatarsal articular angle (DMAA), and forefoot width (bony and soft tissue).
  • Statistical analysis involved Wilcoxon signed rank test for changes and Pearson correlation for associations.

Main Results:

  • Significant reductions observed in bony forefoot width (3.7 mm, 4%) and soft tissue forefoot width (2.5 mm, 2%) at mean follow-up.
  • Decreases in HVA and IMA showed moderate correlations with changes in both bony and soft tissue forefoot width.
  • The MICA procedure demonstrated a statistically significant, albeit modest, decrease in overall forefoot width.

Conclusions:

  • The MICA procedure leads to a significant reduction in both bony and soft tissue forefoot width.
  • Corrections in hallux valgus angle and intermetatarsal angle are moderately associated with forefoot width changes.
  • Findings provide valuable information for patient counseling regarding expected postoperative forefoot dimensions after MICA bunionectomy.