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This research was designed to provide an insight into the state of
occlusal patterns, tooth size and arch dimension of the primary
dentition in a group of preschool Egyptian and Yemeni children. A
total of 1113 Egyptian and Yemeni children aged from 3-5 years were
examined. A sample of 597 children (320 girls and 277 boys) was
selected from the examined children to meet the following criteria;
to have a full complement of primary dentition, no missing teeth,
no interproximal carious lesions and to be free from any dental
malformations. Children with systemic health disease or children
with tendency to bruxism and abnormal habits were excluded. For
each subjects an alginate impression was taken for both dental
arches and poured in dental stone, to produce dental casts on which
the following measurements were recorded for each arch; tooth size,
arch dimensions, occlusal relationships and the presence or absence
of spacing and crowding. A digital calliper was used to record the
measurements. The recorded data was tabulated and statistically
analyzed with SPSS 20.0(r) (Statistical Package for Scientific
Studies) for Windows.
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