Three-dimensional finite element models of advancement skin flap and simulation analysis based on skin biomechanical features
10.3760/cma.J.issn.1671-0290.2011.02.013
- VernacularTitle:基于皮肤生物力学的推进皮瓣三维有限元模型与模拟分析
- Author:
Zhao ZHANG
;
Jie LUAN
;
Zuojun JING
;
Guanyi LI
;
Yujing LI
- Publication Type:Journal Article
- Keywords:
Advancement skin flap;
Biomechanics;
Finite element analysis;
Computeraided design
- From:
Chinese Journal of Medical Aesthetics and Cosmetology
2011;17(2):121-124
- CountryChina
- Language:Chinese
-
Abstract:
Objective To build three-dimensional (3-D) finite element models for local advancement skin flap, by which the post-operative local strain and local stress of skin were figured out to assist in the design of skin flap in clinic. Methods The biomechanical parameters of human forehead skin were obtained in vitro from biomechanical experiments. The 3-D finite element model of local advancement skin flap was set up by MSC Marc/Mentat 2005 (3-D finite element software). Six models were built with the same flap but different skin defects, to simulate post-operative local strain of skin and local stress of skin in different models. Results Post-operative local stress of skin increased with the skin flaps stretching, but the relationship between increase and stretching did not meet the linear rule. Skin flap was able to stretch to 40 % of its initial length in theory if we did not consider blood supply of it. When the skin flap stretched over 40 % of its initial length, the maximal stress could exceed the yield limit. Conclusion It is an effective and workable way to simulate local advancement skin flap using 3-Dfinite element model and biomechanical parameters of human skin. The stretch ratio of local advancement skin flap should be not over 40% for safety.
