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Related Experiment Video

Updated: May 23, 2026

An Anatomical Study of Nerves at Risk During Minimally Invasive Hallux Valgus Surgery

An Anatomical Study of Nerves at Risk During Minimally Invasive Hallux Valgus Surgery

Published on: February 17, 2018

Increased Intercuneiform and Naviculocuneiform Joint Spacing in Hallux Valgus: A 3-Dimensional Distance Mapping Pilot

Brian F Closkey^1,2, Brett D Steineman¹, A Holly Johnson¹

¹Hospital for Special Surgery, New York, NY, USA.

Foot & Ankle Orthopaedics

|May 22, 2026

Summary

Hallux valgus (HV) involves midfoot instability, with increased joint spacing found in the intercuneiform (IC) and naviculocuneiform (NC) joints of HV patients. These findings suggest HV deformity extends beyond the first tarsometatarsal (TMT1) joint.

Keywords:

TMT joint distance map hallux disorders hallux valgus intercuneiform joint naviculocuneiform joint weight bearing CT

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Automated Joint Space Detection Improves Bone Segmentation Accuracy

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Published on: November 28, 2025

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Last Updated: May 23, 2026

An Anatomical Study of Nerves at Risk During Minimally Invasive Hallux Valgus Surgery

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Published on: February 17, 2018

Automated Joint Space Detection Improves Bone Segmentation Accuracy

Automated Joint Space Detection Improves Bone Segmentation Accuracy

Published on: November 28, 2025

Area of Science:

Orthopedic surgery
Biomechanical analysis
Foot and ankle anatomy

Background:

Hallux valgus (HV) is a complex 3D deformity of the first ray with high recurrence rates after surgery.
Unrecognized midfoot instability may contribute to HV recurrence.
Previous research implicated the first tarsometatarsal (TMT1) joint, but other midfoot joints like intercuneiform (IC) and naviculocuneiform (NC) may also be involved.

Purpose of the Study:

To compare joint spacing in midfoot joints between patients with Hallux Valgus (HV) and control subjects.
To investigate potential joint space widening in the medial column joints beyond the TMT1 joint in HV.
To determine if midfoot joint instability is associated with HV deformity.

Main Methods:

Retrospective pilot study of 20 HV patients and 20 matched controls using preoperative weightbearing CT scans.
Segmentation of midfoot bones and 3D distance mapping to assess joint spacing at TMT1, IC, and NC joints.
Analysis of regional joint space differences using automated coordinate systems and Matlab.

Main Results:

Significantly greater joint spacing was observed in the proximal IC joint of HV patients (0.95mm) compared to controls (0.61mm).
Increased spacing was also found in the medial NC joint of HV patients (1.23mm) versus controls (1.11mm).
No significant difference in joint spacing was detected at the TMT1 joint between HV patients and controls.

Conclusions:

Hallux valgus patients exhibit altered joint spacing in the proximal IC and medial NC joints compared to controls.
These findings suggest a link between proximal midfoot joint spacing and HV deformity.
Structural changes in HV may extend beyond the TMT1 joint, necessitating broader midfoot evaluation.