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Related Experiment Video

Updated: Jun 11, 2026

Adult Mouse Digit Amputation and Regeneration: A Simple Model to Investigate Mammalian Blastema Formation and Intramembranous Ossification
09:17

Adult Mouse Digit Amputation and Regeneration: A Simple Model to Investigate Mammalian Blastema Formation and Intramembranous Ossification

Published on: July 12, 2019

Type IV-D thumb duplication: A new reconstruction method.

A Abid1, F Accadbled, G Knorr

  • 1Pediatric Orthopaedics Unit, Children Hospital, 330, avenue de Grande-Bretagne, 31059 Toulouse cedex 9, France. abid.a@chu-toulouse.fr

Orthopaedics & Traumatology, Surgery & Research : OTSR
|July 3, 2010
PubMed
Summary
This summary is machine-generated.

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This study presents a modified Bilhaut-Cloquet procedure for complex Wassel type IV-D thumb duplication, successfully correcting axis deformity and joint instability while preserving a single nail and avoiding dystrophy.

Area of Science:

  • Orthopedics
  • Hand Surgery
  • Pediatric Surgery

Background:

  • Wassel type IV thumb duplication is common, with type IV-D being the most complex.
  • This complex form involves hypoplastic, divergent metacarpophalangeal, and convergent interphalangeal joints.
  • Reconstruction challenges include axis deformity, ligament laxity, and potential nail dystrophy with standard techniques.

Purpose of the Study:

  • To introduce a modified Bilhaut-Cloquet procedure for Wassel type IV-D thumb duplication.
  • To address the complexities of axis deformity, ligament laxity, and nail dystrophy.
  • To evaluate the preliminary outcomes of this modified surgical technique.

Main Methods:

  • A modified Bilhaut-Cloquet procedure was performed on four male infants with IV-D thumb duplication.

Related Experiment Videos

Last Updated: Jun 11, 2026

Adult Mouse Digit Amputation and Regeneration: A Simple Model to Investigate Mammalian Blastema Formation and Intramembranous Ossification
09:17

Adult Mouse Digit Amputation and Regeneration: A Simple Model to Investigate Mammalian Blastema Formation and Intramembranous Ossification

Published on: July 12, 2019

  • The technique involves longitudinal splitting of proximal phalanges, oblique osteotomy with wedge excision/preservation, and bone suture for stabilization.
  • Central skin and hypoplastic nail excision were performed, preserving a single nail.

    • Main Results:

    • Four male patients (mean age 11 months) underwent the procedure.
    • Follow-up averaged 24 months (range 12-36 months).
    • All patients achieved good outcomes according to the Horii score, with no reported axis deformity, instability, or nail dystrophy.

    Conclusions:

    • The modified Bilhaut-Cloquet procedure effectively corrects axis and stabilizes the interphalangeal joint in IV-D thumb duplication.
    • Preserving a single nail avoids nail dystrophy, a common complication of the standard technique.
    • Preliminary results are encouraging, though long-term evaluation is necessary.