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

Autor:	Al-Jamal GA; Department of Oral Medicine & Oral Surgery, Jordan University of Science & Technology, Irbid, Jordan. ghaidaa@just.edu.jo, Hazza'a AM, Rawashdeh MA
Jazyk:	angličtina
Zdroj:	The Angle orthodontist [Angle Orthod] 2010 Nov; Vol. 80 (6), pp. 1122-8.
DOI:	10.2319/020910-83.1
Abstrakt:	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.
Databáze:	MEDLINE
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