1482 patients of 3-5 years ( 56% m/44% f) were
selected from Isfahan kindergartens. In 1.4% of them, numeric dental anomaly was diagnosed of which 0.74
% had congenital missing teeth, 0.06 %
had hyperdontia and 0.6% had geminated teeth. 0.72 % of Congenital missing was
seen in boys while 1.2% in girls. Also, Gemination was seen 0.12 % in boys and
1.2% in girls which is 10 times more than boys in total study population. 0.2%
of cases had concomitant tooth missing and gemination. Missing was mostly seen
in mandibular incisors. Germination was seen
80% in mandibular anterior region. Besides, in 50% of the patients who
had primary teeth missing, permanent teeth missing in both sides were also
diagnosed by radiography. One case found with supernumerary tooth in maxillary
lateral incisor region. In this article, the possible risk factors were
analyzed in case and control groups. Any significant relationship between these
factors and numeric dental anomalies was concluded