Modified Herbst Approach to Improve Chin Projection

This study will collect data to try to assess which one of the two management options works better. The first option involves the use of the bite corrector first and then braces, while the second option involves the temporary addition of small support bone screws with the bite corrector later and then braces. Currently, it is not clearly known if there are important differences between the proposed management options. Such approaches are conventionally used in orthodontic practices. The information collected in this study will be used to compare the differences in the nature of the facial, teeth, and bone changes after the treatment. Questions about the experience while using the devices will be asked.

Inclusion Criteria:Class II skeletal malocclusion based on PgOLp more than 85 mm and A-OLp more than 75 mm.Perceived potential improvement of facial convexity.At least end-to-end bilateral molar relationship.Early permanent dentition.No congenitally missing teeth.Exclusion criteria:Class II skeletal malocclusion based on PgOLp less than 85 mm and A-OLp less than 75 mm.Only reasonable management option is surgery.Less than an end-to-end bilateral molar relationship.Mixed dentition dentition.Congenitally missing teeth.