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Change in Shoe Size and Forefoot Morphological Parameters After Scarf + P1 Osteotomy for Hallux Valgus: a Prospective Study Using Surface 3D Scanning
Sponsor: Groupe Hospitalier Diaconesses Croix Saint-Simon
Summary
Background and Rationale: Surgical correction of Hallux Valgus via Scarf and P1 osteotomy aims to realign the first ray, modifying overall forefoot morphology. While radiological correction is well established, a discrepancy often exists between objective foot measurements and patient-perceived postoperative shoe fitting. Weight-bearing 3D surface scanning provides a non-irradiating, precise method to evaluate volumetric and dimensional changes without the biases of traditional foot-measuring gauges. Objective and Hypothesis: The primary objective is to measure changes in shoe size (in French/Paris points) using weight-bearing 3D surface scanning between baseline and 6 months postoperatively. The study hypothesis is that Scarf + P1 osteotomy induces a shoe size reduction of at least 0.5 Paris points at 6 months, correlated with forefoot width reduction, M1 shortening, and angular correction (HVA and M1-M2 angles). Study Design: Prospective, single-center, non-comparative interventional study with minimal risks and constraints (RIPH 2) involving 100 participants.
Official title: Changes in Shoe Size and Forefoot Morphological Parameters After Scarf + P1 Osteotomy for Hallux Valgus: A Prospective Study Using Surface 3D Scanning
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
100
Start Date
2026-09-20
Completion Date
2027-12-31
Last Updated
2026-08-26
Healthy Volunteers
No
Conditions
Interventions
Surgical correction of hallux valgus via osteotomy
A prospective, non-comparative, single-center interventional study involving human subjects and entailing minimal risk and burden (RIPH2). The interventions introduced by the research consist of: 1. Performing a mini-surface scan during the 6-week postoperative consultation. 2. Scheduling the patient for a 6-month consultation. 3. Performing a mini-surface scan during the 6-month postoperative consultation. 4. Measuring shoe size using a foot-measuring device preoperatively, and tracking both reported and measured (using the device) shoe size postoperatively at 6 weeks and 6 months.