Objective: To determine and compare tooth crown dimensions in primary and permanent dentitions of subjects with Down Syndrome (DS) and a selected Nigerian population without DS.
Materials And Methods: A sample of subjects with DS and a control group were selected from the Down Syndrome Resource Centre and the Dental Clinic of the Lagos University Teaching Hospital, Lagos respectively. Dental stone models were made from maxillary and mandibular alginate impressions of the population samples after obtaining consent from the subjects and their parents/caregivers. Measurement of tooth dimensions (Mesiodistal, Buccolingual and Clinical Crown Heights) was carried out using an electronic digital caliper. The descriptive statistics were obtained and compared for all parameters using SPSS version 17.
Results: The mean mesiodistal tooth dimensions were smaller in the permanent dentition of subjects with DS and the difference in dimensions was statistically significant in most tooth types. The mean tooth dimensions in the primary dentition were generally smaller in DS individuals except in the mesiodistal tooth dimensions of maxillary central incisors and canines, mandibular canines and the clinical crown heights of the maxillary central incisors and 2nd molars.
Conclusion: The tooth dimensions were generally smaller in both primary and permanent dentitions of subjects with DS than in controls without DS.
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