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Volume 33 , Issue 3
May/June 2013

Pages 289296

A Classification System for Crestal and Radicular Dentoalveolar Bone Phenotypes

George A. Mandelaris, DDS, MS/Brian S. Vence, DDS/Alan L. Rosenfeld, DDS/David P. Forbes, DDS, PhD

PMID: 23593622
DOI: 10.11607/prd.1787

Pretreatment knowledge of crestal and radicular dentoalveolar zones and their associated thicknesses can improve risk assessment to meet esthetic and functional goals, particularly when discrepancies in anterior maxillary and mandibular arches exist and when an anterior protected articulation is to be achieved. This paper discusses a new classification of dentoalveolar bone phenotypes that differentiates the alveolar crestal zone from that of the radicular zone and classifies the thickness of facial bone at each compartment to aid in interdisciplinary dentofacial therapy risk assessment. The zone of crestal bone is defined as the region of the tooth alveolus measured from the cementoenamel junction (CEJ) to a point 4 mm apical. The dentoalveolar radicular zone is dependent upon the individual root length. It begins at a point 4 mm apical to the CEJ (base of the crestal zone) and extends the length of the tooth root. Dentoalveolar bone phenotype at both zones (crestal and remaining radicular alveolar aspect) can be categorized as either thick or thin. Thick is defined as ≥ 1 mm of facial bone width while thin is < 1 mm. (Int J Periodontics Restorative Dent 2013;33:289296. doi: 10.11607/prd.1787)

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