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Journal of Dental Research
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Clinical

An Uncommon Cleft Subtype of Unilateral Cleft Lip and Palate

T. Yamanishi1,*, C. Kobayashi1,2, I. Tsujimoto1, H. Koizumi1, S. Miya1, Y. Yokota1, R. Okamoto1, S. Iida1, T. Aikawa1, H. Kohara2, J. Nishio2 and M. Kogo1

1 First Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Osaka University, 1-8 Yamadaoka, Suita, Osaka, Japan; and
2 Department of Oral and Maxillofacial Surgery, Osaka Medical Center and Research Institute for Maternal and Child Health, 840 Murodocho, Izumi, Osaka, Japan

Correspondence: * corresponding author, yaman2{at}dent.osaka-u.ac.jp

The finding that the vomer plays a crucial role in maxillary growth suggests that the bilateral cleft configuration of unilateral cleft lip and palate (UCLP), in which the vomer is detached from the non-cleft-side secondary hard palate, negatively influences palatal development, and this hypothesis was tested. Sixty persons with complete UCLP, including those with the vomer detached from (n = 30, b-UCLP) and attached to (n = 30, u-UCLP) the secondary hard palate, were analyzed morphologically, with the use of cast models taken at 10 days, 3 mos, and 12 mos of age. The anterio-posterior palatal length at 12 mos of age in those with b-UCLP was significantly shorter than that in those with u-UCLP, by 8.7% (p < 0.05). In addition, palatal width development in the first year in those with b-UCLP was also significantly retarded. These results suggest that the uncommon bilateral cleft subtype in UCLP should be included in the cleft classification.

Key Words: UCLP • cleft subtype • palatal development

Journal of Dental Research, Vol. 87, No. 2, 164-168 (2008)
DOI: 10.1177/154405910808700212
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