Finite element analysis of the comprehensive impact of scar and maxillary expansion combined with protraction on the development of maxilla with cleft lip and palate after repair operation

doi:10.7518/hxkq.2020.06.006

Abstract

Abstract:

Objective To study the comprehensive impact of scar and maxillary expansion combined with protraction on the development of maxilla with cleft lip and palate after repair operation. Methods In the original finite element model of the maxilla with cleft palate, a finite element model of the maxilla with cleft lip and palate was established by using Boolean operation in ANSYS. Scar force after cleft lip and palate repair and maxillary expansion force combined with protraction were added simultaneously to process the stress analysis. Results Maxillary deformation occurred in the three-dimensional direction. The comparison of displacements was as follows: X-axis>Z-axis>Y-axis. Conclusion Maxillary growth is significantly inhibited in the three-dimensional direction under the comprehensive impact of scar and maxillary expansion combined with protraction after repair operation, especially transverse and sagittal growth.

Key words: cleft lip and palate, scar, orthodontic treatment, maxillary growth, three-dimensional finite element

CLC Number:

R782.2

Huang Wei, Li Yinghui, Guo Kaili, Zhou Yongchuan, Li Xiangjun. Finite element analysis of the comprehensive impact of scar and maxillary expansion combined with protraction on the development of maxilla with cleft lip and palate after repair operation[J]. West China Journal of Stomatology, 2020, 38(6): 642-646.

Figures/Tables 7

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工况名称	施力部位	力值大小/N	施力方向
上唇压力	上唇软组织与牙槽突交界区	7.16	垂直于牙槽突前表面
腭部瘢痕力	腭板软硬组织交界区	17.52	由前向后,由外向内
上颌扩弓力	双侧上颌第一前磨牙、第一磨牙牙槽嵴顶区	4.9	平行于平面水平向两侧
上颌前牵引力	双侧上颌尖牙牙槽嵴顶区	4.9	平面前下30°