Applying random dot moire patterns to clinical orthodontics

概要

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In clinical orthodontics, the headgear is used to treat maxillary protrusion, while the chin cap and maxillary protractor are used to treat mandibular protrusion. These devices use orthopedic force to improve jaw discrepancies. Research on these appliances that produce orthopedic force often analyzes the position of the center of resistance and of the center of rotation in the maxillofacial complex. How orthopedic forces affect maxillary and mandibular rotations depends on the location of the pulling force relative to the center of resistance. Past research methods have been very complex. Because simulation models were rarely used, the accurate centers of resistance and rotation were not obtained. We applied random dot moire patterns to cephalometric radiographs to develop a simple method of pinpointing the center of rotation. (J Osaka Dent Univ 2007 ; 41 : 107-110)