- Patent: US 6,626,665 B1
- Patent Date: September 30, 2003
Over the past decade, nonextraction treatment and noncompliance therapies have become more popular in correction of Class II malocclusions. Conventional treatment of Class II cases usually requires distal movement of maxillary molars in order to achieve a Class I molar and canine relationship. However, if the maxillary molars are not distalized bodily and adequate anchorage is not established to move premolars and canines distally, anchorage will be easily lost. The literature shows that various devices have been developed for molar distalization; headgear was used routinely for distal movement of maxillary molars. However, headgear relies totally on patient cooperation, which could reduce treatment success and increase treatment duration.