Displacement and stress distribution of the maxillofacial complex during maxillary protraction with buccal versus palatal plates: Finite element analysis
Document Type
Article
Publication Title
European Journal of Orthodontics
Abstract
Objectives: The aim of this study was to analyse the displacement and stress distribution in the maxillofacial complex during maxillary protraction with buccal and palatal plates using threedimensional finite element analysis. Materials and methods: Three anchorage appliance models-palatal plate (Type A), miniplate at the infrazygomatic crest (Type B), and conventional tooth-borne appliance (Type C)-were designed and integrated into a skull model. Protraction force was 500 g per side and force direction was forward and 30 degree downward to the maxillary occlusal plane. The stress distribution around the circum-maxillary sutures and the displacement of the surface landmarks were analysed. Results: All models showed forward and upward displacement at anterior nasal spine, Point A, and prosthion and forward and downward displacement at posterior nasal spine resulting in a counterclockwise rotation. This anterior displacement was greatest in Type A. At the maxillary process of the zygoma, upward movement was shown only in Type A, whereas downward movement was observed in Types B and C. The greatest stresses in Type A were at the pterygomaxillary and the zygomaticotemporal sutures. Type B showed the greatest stress at the frontomaxillary suture. Limitations: Type A showed asymmetric results; however, it was not of clinical significance. Conclusion: The palatal plate resulted in wider stress distribution and more forward displacement compared to miniplate at the infrazygomatic crest area and conventional tooth-borne appliances. It might be recommended to consider the application of the palatal plate for maxillary protraction in Class III patients.
First Page
275
Last Page
283
DOI
10.1093/ejo/cju039
Publication Date
6-1-2015
Recommended Citation
Kim, Kwang Yoo; Bayome, Mohamed; Park, Jae Hyun; Kim, Ki Beom; Mo, Sung Seo; and Kook, Yoon Ah, "Displacement and stress distribution of the maxillofacial complex during maxillary protraction with buccal versus palatal plates: Finite element analysis" (2015). ASDOH Faculty Publications. 169.
https://scholarworks.atsu.edu/asdoh-faculty/169