A finite element analysis of bilateral complete cleft lip and palate during expansion with variable types and locations of the ex-pander
10.13591/j.cnki.kqyx.2025.11.011
- VernacularTitle:扩弓器种类及位置对双侧完全性唇腭裂扩弓生物力学影响的有限元分析
- Author:
Pinyi YAO
1
;
Hongyang WANG
;
Mingyue WANG
;
Hongchuang ZHANG
Author Information
1. 徐州医科大学附属徐州市立医院/徐州市第一人民医院口腔科,江苏徐州(221000)
- Publication Type:Journal Article
- Keywords:
finite element analysis;
palatal expansion;
bilateral complete cleft lip and palate;
fan-shaped expander;
Hyrax expander
- From:
STOMATOLOGY
2025;45(11):858-864
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the different biomechanical effects of two types of palatal expanders and expansion sites on a bi-lateral complete cleft lip and palate(BCCLP)in mixed dentition with a finite element analysis(FEA).Methods The CBCT data of a patient with BCCLP were collected to construct a FEA model containing craniomaxillary suture structure.The fan-shaped and traditional Hyrax expanders were drawn and assembled into the FEA model in SolidWorks software according to the working conditions as follows:condition 1 and 2,the fan-shaped expander was placed at the anterior/posterior part of the palate respectively;condition 3 and 4,the Hyrax expander was placed at the anterior/posterior part of the palate respectively.A 5 N force in X axis direction was loaded at the apex of the expander coil spring.The stress distribution and initial displacement of craniomaxillary complex in four working conditions were compared.Results ①In working condition 1,2 and 3,the displacement of anterior part was larger than the posterior part of the dental arch.Under condition 4,the displacement of anterior,middle and posterior parts of dental arch were basically the same.②The maximum stress and displacement were observed at crowns in all working conditions.③There was a certain skeletal enlargement effect,which showed a gradually decreasing deformation trend from alveolar region to the upward region.Conclusion The expansion effect of fan-shaped expander is more suitable for BCCLP patients with extremely narrow anterior arch and normal posterior arch.For the tradi-tional Hyrax expander,the position has a great influence on expansion effect.It is showed that the dental support expander could pro-duce skeletal dilation effect in BCCLP patients during mixed dentition.
