Finite element analysis of skin closure stress in different directions

Transcription

1 Chinese Journal of Tissue Engineering Research February 8, 2017 Vol.21, No ( ). [J] (4): DOI: /j.issn ORCID: () QUS 4 (1) (2) (3) 30 (4) :R318 : : (2017) QUS (Langer's lines) ( )( ) Finite element analysis of skin closure stress in different directions Lv Ying 1, n Mei-wen 1, Hou Chun-sheng 2 ( 1 Taiyuan University of Technology, Institute of pplied Mechanics and iomedical Engineering, Taiyuan , Shanxi Province, China; 2 General Hospital of TISCO, urn Center of Shanxi Province, Taiyuan , Shanxi Province, China) bstract CKGROUND: Mechanical factors play an important role in wound healing and scar formation. Finite element model is established to stimulate, analyze and optimize different sutures, which has become a hotspot to guide Lv Ying, Taiyuan University of Technology, Institute of pplied Mechanics and iomedical Engineering, Taiyuan , Shanxi Province, China Corresponding author: n Mei-wen, Doctoral supervisor, Professor, Taiyuan University of Technology, Institute of pplied Mechanics and iomedical Engineering, Taiyuan , Shanxi Province, China ISSN CN /R CODEN: ZLKHH 609

2 . surgies accurately. OJECTIVE: To analyze the stress distribution of different simple interrupted suturing directions on the skin wound by establishing the skin finite element model, and to provide basic data for the study of scar formation. METHODS: Porcine back skin uniaxial tensile test was performed to provide reference for the mechanical properties of human skin. Orthotropic skin wound model was established using QUS to calculate the stress distribution on the wound in different suturing directions. RESULTS ND CONCLUSION: The anisotropic mechanical properties of skin wound influenced the suture stress significantly. The elastic modulus along the Langer s line was larger than that in the vertical direction. The stress increased orderly in the Langer s line direction, the Langer s line deflected 30, bias Langer s line 45 and vertical Langer s line. These results suggest that the clinical incision should be made along the Langer s line direction. dditionally, the cut at an angle with Langer s line can also reduce the stress of suture. Subject headings: Cicatrix; Keloid; Stress, Mechanical; Finite Element nalysis; Tissue Engineering Funding: the National Natural Science Foundation of China, No ; the Natural Science Foundation of Shanxi Province, No Cite this article: Lv Y, n MW, Hou CS. Finite element analysis of skin closure stress in different directions. Zhongguo Zuzhi Gongcheng Yanjiu. 2017;21(4): Introduction [1] [2-7] [8] Candy [9] kaishi [10] [11-13] [14] 40% [15] [16] [17-18] [19-20] [21-22] [23-24] [25] [26] [27-28] [29-31] Z [32] W [33-34] [35] mm [36] 1 Materials and methods h instron P.O. ox 10002, Shenyang

3 . [37] 1 3 Figure 3 ama miniature pig skin samples and experimental equipments instron Figure 1 Simple interrupted suture 100 mm 140 mm 0.8 mm Origin 4 ( X )E1= MPa ( Y)E2=11.76 MPa 1.4 QUS 2 Results (Langer s lines) C D 2 Figure 2 Four kinds of wound models C 30D ( )13 ( )6 3 Discussion kaishi [10] 22.4% 32.2% [38] 13 ISSN CN /R CODEN: ZLKHH 611

4 (MPa) (MPa) Figure 4 The linear relevant fitting results of porcine back skin sample data Figure 5 Calculated results of the incision sutured along the Langer s line Mises MPa MPa 6 Figure 6 Calculated results of the incision sutured perpendicular to the Langer s line Mises MPa MPa 7 30 Figure 7 Calculated results of the incision sutured with 30 angle to the Langer s line Mises MPa MPa 8 45 Figure 8 Calculated results of the incision sutured with 45 angle to the Langer s line Mises 140 MPa MPa 612 P.O. ox 10002, Shenyang

5 . 9 Figure 9 Output pathway of stress in the wound sutured along the Langer s line node 25 node node 10 Mises 9 Figure 10 Mises stress distribution in the wound sutured along the Langer s line Number MPa 56.7 MPa 11 Figure 11 Output pathway of stress in the wound sutured perpendicular to the Langer s line node 25 node node 12 Mises 11 Figure 12 Mises stress distribution in the wound sutured perpendicular to the Langer s line Number MPa 69.4 MPa 13 Figure 13 Distribution of Langer s lines in human body 14 Figure 14 Schematic diagram of simple continuous suture and 8 -shaped suture 8 8 [39] ( ) [40] ( 14) 8 [41] ( 14) Z CNKI 3 ISSN CN /R CODEN: ZLKHH 613

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