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Short mandible – a possible risk factor for cleft palate with/without a cleft lip
Author(s) -
Hermann N. V.,
Darvann T. A.,
Ersbøll B. K.,
Kreiborg S.
Publication year - 2014
Publication title -
orthodontics and craniofacial research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 55
eISSN - 1601-6343
pISSN - 1601-6335
DOI - 10.1111/ocr.12036
Subject(s) - medicine , mandible (arthropod mouthpart) , dentistry , risk factor , odds ratio , orthodontics , confidence interval , logistic regression , biology , botany , genus
Structured Abstract Objectives To estimate the influence of a short mandible on the risk of developing a cleft palate with/without a cleft lip ( CP ). Setting and sample population The retrospective sample consisted of 115 2‐month‐old Danish infants with CP , and 70 control infants with unilateral incomplete cleft lip ( UICL ). Material and Methods Cephalometric X‐rays were obtained. Mandibular length ( L m ) was measured and corrected for body length ( L b ) to remove influence of varying body length in the sample. Logistic regression was applied to the corrected mandibular length ( L mc ) to calculate the risk of having a cleft palate. Results The mean mandibular length in the group with CP was about 4 mm shorter than in the control group. Odds ratio ( OR ) was calculated to be 0.58 (95% confidence interval 0.48–0.68), implying that an individual's risk of cleft palate with/without a cleft lip increases about 50% per mm decrease in mandibular length. Conclusions A special facial type including a short mandible is a possible risk factor for cleft palate, and it was found that the risk of cleft palate increases 58% per mm decreases in mandibular length.