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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 (POINTURE-HV)

24. august 2026 oppdatert av: Groupe Hospitalier Diaconesses Croix Saint-Simon

Changes in Shoe Size and Forefoot Morphological Parameters After Scarf + P1 Osteotomy for Hallux Valgus: A Prospective Study Using Surface 3D Scanning

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.

Studieoversikt

Status

Har ikke rekruttert ennå

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

Study Procedures and Follow-up Schedule: Preoperative Assessment: Clinical evaluation, standing plain radiographs (HVA and M1-M2 angles), baseline self-reported shoe size, foot-measuring device measurement, and weight-bearing 3D surface scan. Surgical Intervention: Hallux valgus correction via Scarf osteotomy of the first metatarsal combined with P1 phalanx osteotomy. Postoperative Follow-up Visits: 6-Week Visit: Routine clinical evaluation, 3D surface scan, foot-measuring device measurement, and self-reported shoe size assessment. 6-Month Visit: Final follow-up visit including standing radiographs, 3D surface scan, foot-measuring device measurement, self-reported shoe size assessment, and recording of surgical/mechanical complications.

Studietype

Intervensjonell

Registrering (Antatt)

100

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studer Kontakt Backup

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen
  • Eldre voksen

Tar imot friske frivillige

Nei

Beskrivelse

Inclusion Criteria:

  • Patient informed about the study and signed written consent obtained in duplicate
  • Male or female participant aged 18 years or older
  • Symptomatic hallux valgus without lateral ray involvement, requiring surgical correction by Scarf + P1 osteotomy
  • Primary surgery planned for the affected foot
  • Ability to understand study information, complete questionnaires, and comply with follow-up visits (6 weeks and 6 months)

Exclusion Criteria:

  • Previous bony surgery of the first ray or forefoot on the affected side (osteotomy, arthrodesis)
  • Surgical indication on lateral rays (claw toes, Weil osteotomy)
  • Severe lower-limb neurological or vascular disease altering gait or foot morphology (Charcot foot, critical limb ischemia, severe neuropathy)
  • Active inflammatory rheumatic disease (e.g., rheumatoid arthritis) with polyarticular foot involvement
  • Complex foot deformity requiring primary first metatarsophalangeal (MTP1) arthrodesis or procedure other than Scarf + P1 osteotomy
  • Pregnant or breastfeeding woman
  • Person under legal guardianship or unable to provide free and informed consent
  • Person deprived of liberty by judicial or administrative decision
  • Concurrent participation in another research study that could interfere with study endpoints

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Helsetjenesteforskning
  • Tildeling: N/A
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Hallux valgus
patients consulting for hallux valgus
Fremgangsmåte: 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.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Change in Weight-Bearing 3D Surface Scan Shoe Size at 6 Months Postoperatively
Tidsramme: Baseline (preoperative) and 6 months postoperatively
Mean change in shoe size (expressed in French size points / Paris points) measured objectively using a weight-bearing 3D surface scanner between baseline (preoperative) and 6 months postoperatively. The proportion of patients experiencing a clinically significant shoe size reduction of at least 0.5 Paris points will also be assessed.
Baseline (preoperative) and 6 months postoperatively

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Change in Self-Reported Shoe Size
Tidsramme: Baseline (preoperative) and 6 months postoperatively
Difference between the patient's self-reported shoe size at 6 months postoperatively compared to baseline (measured in Paris points).
Baseline (preoperative) and 6 months postoperatively
Correlation Coefficient Between Radiographic and 3D Surface Scanner Angular Measurements
Tidsramme: Baseline (preoperative) and 6 months postoperatively
Correlation coefficient evaluating the agreement between Hallux Valgus Angle (HVA) and Intermetatarsal Angle (M1-M2) measured on standing plain radiographs versus 3D surface scan reconstructions.
Baseline (preoperative) and 6 months postoperatively
Incidence of Surgical Complications
Tidsramme: Through 6 months postoperatively
Proportion of patients experiencing early or late postoperative complications, including deformity recurrence, hallux varus hypercorrection, transfer metatarsalgia, hardware intolerance/failure, delayed wound healing, surgical site infection, or dorsal collateral nerve sensory disorders.
Through 6 months postoperatively
Forefoot Morphometric Changes Measured by 3D Surface Scanner
Tidsramme: Baseline (preoperative), 6 weeks, and 6 months postoperatively
Changes in forefoot width (in mm), metatarsal perimeter (in mm), and global forefoot volume (in cm3) measured during weight-bearing 3D surface scanning.
Baseline (preoperative), 6 weeks, and 6 months postoperatively

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Groupe Hospitalier Diaconesses Croix Saint-Simon

Etterforskere

  • Hovedetterforsker: Antoine MOUTON, Diaconesses Croix Saint Simon Hospital Group

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

20. september 2026

Primær fullføring (Antatt)

20. september 2027

Studiet fullført (Antatt)

31. desember 2027

Datoer for studieregistrering

Først innsendt

5. august 2026

Først innsendt som oppfylte QC-kriteriene

5. august 2026

Først lagt ut (Faktiske)

10. august 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

26. august 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

24. august 2026

Sist bekreftet

1. august 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • ID RCB/ 2026-A00408-43

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

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Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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