Abstract
Objective To simulate the state of surgically assisted rapid maxillary expansion on the craniofacial complex, and to evaluate the stress distribution and displacement. Methods Simulated surgically assisted rapid maxillary expansion was performed at the first molar region on a three-dimensional finite element model of the craniofacial complex. The stress distribution and displacement were compared before and after expansion. Results Expansion was found in thetransverse plane, especially in the canine and the first premolar regions. The nasal cavity and palatal plane moved downward and that could relief the resistance of breath. Conclusions Surgically assisted rapid maxillary expansion was effective. Key words: Craniofacial complex; Finite element method; Lateral osteotomy; Palatal expansion technique
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