alexa Effects of Class II activator and Class II activator high-pull headgear combination on the mandible: a 3-dimensional finite element stress analysis study.
Dentistry

Dentistry

Dentistry

Author(s): Ulusoy C, Darendeliler N

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Abstract INTRODUCTION: The aim of this study was to evaluate the effects of the Class II activator and the Class II activator high-pull headgear (HG) combination on the mandible with 3-dimensional (3D) finite element stress analysis. METHODS: A 3D finite element model of the mandible was constructed from a dry human mandible. To investigate the effects of the Class II activator, a 3D model of the lower part of this appliance was constructed and fixed on the mandibular model. The Class II activator high-pull headgear model was established as described, and an extraoral traction force of 350 g was directed from the middle of the Class II activator to the top of the mandibular condyle. The stress regions were studied with the finite element method. RESULTS: The regions near the muscle attachment areas were affected the most. The inner part of the coronoid process and the gonial area had the maximum stress values. CONCLUSIONS: Both functional appliances can cause morphologic changes on the mandible by activating the masticatory muscles to change the growth direction. This article was published in Am J Orthod Dentofacial Orthop and referenced in Dentistry

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