Maxillomandibular plane angle bisector (MM) adjunctive to occlusal plane to evaluate anteroposterior measurement of dental base

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Abstract

Aim: This study was undertaken to analyze the clinical usefulness of the maxillomandibular bisector, its reproducibility, its validity and its relationship to the functional occlusal plane, the bisecting occlusal plane and the nature of its cant. Materials and methods: Thirty pretreatment lateral cephalograms, each of adolescents (above 18 years of age)and children (10-12 years), seeking orthodontic treatment were randomly selected and the Wits technique of anteroposterior measurement was used to compare A-B values measured to the new plane with those measured to the functional occlusal plane (FOP) and to the traditional or bisecting occlusal plane (BOP). Results: Present study showed that MM bisector plane is more reproducible and valid reference plane, than the FOP and BOP. Conclusion: A new plane, geometrically derived from the dental base planes, has been tested as an occlusal plane substitute for the measurement of anteroposterior jaw relationships. It lies close to but at an angle and inferior to the traditional occlusal planes and is highly reproducible at all times. Clinical significance: Maxillomandibular planes angle bisector may be a useful adjunct for the cephalometric assessment of sagittal relationship of the patient.

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APA

Ganiger, C. R., Krishna Nayak, U. S., Cariappa, K. U., & Yusuf Ahammed, A. R. (2012). Maxillomandibular plane angle bisector (MM) adjunctive to occlusal plane to evaluate anteroposterior measurement of dental base. Journal of Contemporary Dental Practice, 13(4), 539–544. https://doi.org/10.5005/jp-journals-10024-1182

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