Analysis of nasal soft tissue deformation and optimization of mechanical stretch therapy for nasal contracture deformity based on three-dimensional finite element model
10.3760/cma.j.cn114453-20240301-00053
- VernacularTitle:基于三维有限元模型分析鼻部软组织形变并优化挛缩鼻畸形机械牵拉治疗方案
- Author:
Yiming WANG
1
;
Yang AN
;
Lian LIU
;
Chong ZHANG
;
Aoxuan ZHU
;
Wei LIANG
;
Meng HAN
;
Guanhuier WANG
;
Yonghuan ZHEN
Author Information
1. 北京大学第三医院成形外科，北京 100191
- Keywords:
Nose deformities, acquired;
Physical traction therapy;
Soft tissue creep;
Biomechanics;
Three-dimensional reconstruction;
Finite element analysis
- From:
Chinese Journal of Plastic Surgery
2024;40(8):819-828
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To establish a three-dimensional finite element model of the nose, simulate and analyze the deformation of nasal tissue caused by different focal points, traction directions, and modes, provide the theoretical basis for the effectiveness of physical traction therapy, and guide the clinical selection of more efficient physical traction therapy methods.Methods:A finite element model of the nose was established by ANSYS Workbench 19.2 software based on image data obtained from CT scans of a 29-year-old male volunteer with normal nasal appearance in Peking University Third Hospital. Two focal points, the nasal tip, and the nasal columella, were selected, and three force directions, parallel to the forward, forward and down 30°, forward and down 60°, were applied. The deformation caused by different traction conditions on the skin, lining, and soft bone parts, as well as the four anatomical landmarks of the nasal tip, nasal root, the midpoint of the nasal columella, and the nasal base, were compared. The deformation produced by 10 minutes of continuous pulling and 10 times 1-minute pulse pulling were compared under the same pulling conditions. The deformations generated by two types of pulling modes within a 24-hour cycle: a single 1-hour cycle and 6 intermittent 10-minute cycles, were compared.Results:All traction conditions resulted in deformation of the nasal model, with the maximum deformation of the nasal tissue obtained by pulling forward and downward at 60° (4.632 9 mm) which was greater than other traction conditions (0.825 0-3.105 0 mm). The maximum deformation value was located near the nasion of the model’s skin layer. The deformation obtained by 10 minutes of continuous pulling (0.176 6 mm) was slightly greater than that obtained by 10 times of 1-minute pulse pulling (0.176 5 mm). Within 24 hours, the final deformation of multiple intermittent pulling modes (0.019 0 mm) was greater than that of a single pulling mode (0.004 3 mm).Conclusion:Physical traction can effectively deform the skin and soft tissue of the nose, and the most efficient operation is to continuously pinch the tip of the nose for a short period and apply tension parallel to the back of the nose downwards, repeating every a few hours.
