The maxillary-mandibular planes angle (MM?) bisector: A new reference plane for anteroposterior measurement of dental bases

Abstract

Diagnosis of an important part of orthodontic treatment. Although many cephalometric analyses have been devised to determine the degree of anteroposterior skeletal discrepancies, effective treatment planning and assessment must be based on accurate measurement using stable and reproducible reference planes.The purpose of study was to evaluate the clinical usefulness of maxillomandibular bisector, its reproducibility, and validity, and relationship to functional occlusal plane, bisecting occlusal pane.Pre-treatment lateral cephalograms of 30 adult patients (age 18 or above) were selected. Various Angular & Linear measurement were recorded. Present study showed MM bisector plane, FOPPM is more reproducible and valid reference point than BOPMM, BOPPM.