Intra-oral Distribution (intra-oral + distribution)

Distribution by Scientific Domains

Selected Abstracts

Intra-oral distribution of caries in South Australian children

Australian Research Centre for Population Oral Health, South Australia, The University of Adelaide
First page of article [source]

Agenesis of permanent teeth in 8138 Danish schoolchildren: prevalence and intra-oral distribution according to gender

Objective., The purpose of this study was to describe agenesis of permanent teeth in children with respect to prevalence and intra-oral distribution according to gender. Methods and subjects., The study was population based and included all children in one district of the municipality of Aarhus, Denmark, in 1974,1979 (1657 girls and 1668 boys) and 1992,2002 (2409 girls and 2404 boys). The children underwent systematical clinical and radiographic examination. Results., The period prevalence rates were almost identical for the two time periods (1972,1979: 7.8%; 1992,2002: 7.1%). Girls were affected more frequently than boys, and affected girls had more congenitally missing teeth than affected boys. Unilateral agenesis of the second premolars was more frequent than bilateral agenesis. In children with only one congenitally missing tooth, agenesis of the upper lateral incisors was asymmetrical in girls, but not in boys, whereas the opposite was true for the lower second premolars in boys. Conclusion., The prevalence of agenesis of permanent teeth in Danish schoolchildren seems to be constant over time, and similar to that found in other large, population-based studies. Intra-oral distributions of congenitally missing teeth indicate gender-specific patterns. [source]

Dentine hypersensitivity in subjects recruited for clinical trials: clinical evaluation, prevalence and intra-oral distribution

D. G. Gillam
Relatively few studies have reported on the frequency, distribution and severity of dentine hypersensitivity (DH) in subjects recruited for clinical trials of desensitizing agents. Potential subjects (n= 48 M, 81 F, mean age 35·1 years) for inclusion into such a study were screened to determine the extent of the problem. 117 subjects (41 M, 76 F) mean age 24·9 years were clinically examined. Evaluation by questionnaire indicated that the prevalence of DH was proportionately higher in the 20,29·9 years (34·9%), and 30,39·9 years groups (33·3%), respectively. Sensitivity to cold was the main presenting symptom. Tactile (probe) and cold air (dental air syringe) stimuli were used to clinically evaluate DH. Of the teeth eligible for evaluation 1561/3136 (49·8%) responded to either one or both of the test stimuli; 274/3136 (8·7%) responded to tactile only stimulation, 779/3136 (24·8%) to thermal only stimulation and 508/3136 (16·2%) to both tactile and thermal stimulation. Of those teeth responding to the stimuli, 477 (30·6%) were premolars, 437 (28%) incisors, 415 (26·8%) molars and 232 (14·9%) canines. The results agree with those of previously reported studies in that DH is most frequently observed on premolars and that proportionately more teeth are sensitive to evaporative than to tactile stimulation. Furthermore it would appear from the results of the study that tactile is less effective than thermal/evaporative stimulation in the evaluation of DH. [source]