Asymmetric maxillary protraction for unilateral cleft lip and palate patients using finite element analysis

The Journal of Craniofacial Surgery
Zhengxi ChenGang Shen

Abstract

Unilateral cleft lip and palate (UCLP) patients frequently present with an asymmetry in the nasomaxillary complex and a maxillary hypoplasia. The aim of this study was to investigate biomechanic effects of asymmetric maxillary protraction in UCLP patients using finite element method. A finite element model of a UCLP patient's skull was generated using data from spiral computed tomographic scans. On the basis of this finite element model, three groups of orthopedic forces were loaded. All forces were applied in a direction that was 30 degrees downward and forward to the occlusal plane on the region of the alveolar of the maxillary canine. The value of orthopedic force was 5 N in cleft side and 5 N in noncleft side (group A), 6 N in cleft side and 5 N in noncleft side (group B), and 7 N in cleft side and 5 N in noncleft side (group C), respectively. All 3 groups were effective in promoting maxilla forward. In group B, the displacement difference between the cleft side and the noncleft side was the smallest. The largest value difference between the cleft side and the noncleft side was found in group C. Maxillary protraction with a loading of 6 N in the cleft side and 5 N in the noncleft side produced the most favorable outcome. It...Continue Reading

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Citations

Oct 1, 2015·Journal of Cranio-maxillo-facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery·Haizhou TongZhenmin Zhao
Apr 25, 2021·Biomechanics and Modeling in Mechanobiology·S M Velez-MurielD A Garzon-Alvarado
Jan 23, 2021·The Journal of Craniofacial Surgery·Maria Giulia Rezende PucciarelliSimone Soares

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