OBJECTIVETo study the boundary between orthodontic and surgical treatment in correction of anterior open bite.

METHODS70 cases (18.0 ages in average) treated orthodontically and 14 cases (25.1 ages in average) treated surgically were chosen. 154 hard and soft tissue measurements were analyzed by statistical software.

RESULTSA diagnostic index, L1MP, was gained with simple factorial analysis. L1MP

CONCLUSIONThe diagnostic index and discriminate function were both useful in determining which method to be chosen in treatment of anterior open bite. The discriminate function was tested to be more efficient than the diagnostic index.

Adolescent ; Adult ; Child ; Humans ; Malocclusion ; diagnosis ; therapy ; Orthodontics, Corrective ; methods