Ethnic differences in the root to crown ratios of the permanent dentition.

ABSTRACT:

Objective

Root resorption due to orthodontic tooth movement may adversely affect the root-crown (R/C) ratios of permanent teeth, especially in patients with Short Root Anomaly (SRA), a poorly understood disorder affecting root development. Evaluation of SRA R/C ratios to normal dentition would facilitate diagnosis and orthodontic treatment planning. However, reference values are not available for all ethnicities. Our goal was to determine R/C ratios of permanent teeth and their relationship to gender and ethnicity.

Setting/sample

A retrospective study of 333 patients (109 Caucasians, 112 African Americans and 112 Hispanics) from the University of Alabama at Birmingham School of Dentistry.

Materials/methods

Root lengths and crown heights were measured from panoramic ra

SUBMITTER: Wang J 

PROVIDER: S-EPMC6449179 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature