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. 2010 Nov;80(6):1122-8.
doi: 10.2319/020910-83.1.

Crown-root ratio of permanent teeth in cleft lip and palate patients

Ghaida A Al-Jamal  1 , Abdalla M Hazza'a, Ma'amon A Rawashdeh
Affiliations

Crown-root ratio of permanent teeth in cleft lip and palate patients

Ghaida A Al-Jamal et al. Angle Orthod. 2010 Nov.

Abstract

Objectives: To determine root lengths of fully developed permanent teeth of cleft lip and palate (CLP) patients and to define their crown-root (C/R) ratios.

Method: Crown height and root length of permanent teeth were measured from panoramic radiographs of 44 CLP patients and 37 controls. A total of 1397 teeth were measured, and C/R ratios were calculated.

Results: Higher C/R ratios were found in CLP patients; this was statistically significant for both maxillary and mandibular incisors and canines. Bilateral CLP subjects showed higher C/R ratios in general than unilateral CLP subjects. Roots of maxillary incisors, canines, and some other teeth were significantly shorter in CLP patients than in controls.

Conclusions: CLP patients should be considered to have unfavorable C/R ratios, which could be the result of short root lengths for some teeth.

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