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Related Concept Videos

Deformations in a Transverse Cross Section01:21

Deformations in a Transverse Cross Section

When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...

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Related Experiment Video

Updated: Jun 14, 2026

Coronoid-Temporalis Pedicled Flap for Orbital Floor Defect Reconstruction
06:32

Coronoid-Temporalis Pedicled Flap for Orbital Floor Defect Reconstruction

Published on: December 5, 2025

[Thumb reconstruction with modified free wrap-around flap].

Lishan Zhang1, Yongwei Pan, Guanglei Tian

  • 1Department of Hand Surgery, Beijing Jishuitan Hospital, Beijing, 100035, P.R. China.

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi = Zhongguo Xiufu Chongjian Waike Zazhi = Chinese Journal of Reparative and Reconstructive Surgery
|April 8, 2010
PubMed
Summary

The modified wrap-around flap technique effectively reconstructs thumbs, yielding aesthetic and functional results. Donor foot function is largely preserved, making it a viable option for thumb reconstruction.

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Area of Science:

  • Orthopedic Surgery
  • Microsurgery
  • Reconstructive Surgery

Background:

  • Thumb reconstruction is crucial for hand function.
  • The modified wrap-around flap technique offers a potential solution for thumb defects.

Purpose of the Study:

  • To evaluate the functional and aesthetic outcomes of thumb reconstruction using the modified wrap-around flap.
  • To assess the impact on donor foot function.

Main Methods:

  • A retrospective study of 65 patients undergoing thumb reconstruction with a modified wrap-around flap.
  • Functional evaluation using the Foot function index-verbal rating scales (FFI-5pt) and American Orthopaedic Foot and Ankle Society (AOFAS) scores.
  • Gait analysis and dynamic pedobarography were performed on a subset of patients.

Main Results:

  • Reconstructed thumbs demonstrated satisfactory aesthetics and range of motion.
  • Donor feet showed preserved function with no significant difference in gait parameters compared to contralateral feet.
  • Two-point discrimination of the reconstructed thumb was (9.7 +/- 2.8) mm, while donor foot plantar skin showed (9.0 +/- 2.6) mm.

Conclusions:

  • The modified wrap-around flap is effective for thumb reconstruction, providing both aesthetic and functional improvements.
  • This technique largely preserves the function of the donor foot, minimizing donor site morbidity.