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KMID : 0355219790040010022
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Journal of Korean Academy Oral Medicine
1979 Volume.4 No. 1 p.22 ~ p.30
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A STUDY ON THE ERUPTION TIME OF PERMANENT CENTRAL INCISOR WITH THE ERUPTION PHASES IN KOREAN
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Abstract
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Numerous investigators have pointed out that the force of the tongue against the teeth within the dental arches is normally compensated for by the action of the musculature of the cheeks and lips, end that the tongue´ et rest occupies e large pert of the oral´ cavity.
The purpose of this study was to estimate the maximum areas of the tongue movement by measuring the inner areas of the dental arches of both the maxilla end the mandible. This study was based on the study models of 30 children end 128 adults who had clinically good occlusion. There were 15 male end 15 female children whose ages ranged from four years to seven years end
82 male and 46 female adults whose ages ranged from fiften years
to fifty four years.
The obtained results were as follows;
1. The mean of the maximum areas within the primary dental arches ,of both the maxilla and the mandible were 7.06+0. 88Cm2, 5.49+0.77 Cm2 in male children and 6.82+0.98 Cm2, 5.28+0.80Cm2
in female children respectively.
2. The mean of the maximum areas within the permanent dental arches of both the maxilla and mandible were 17.01+2.38 Cm2,
13.57+1.57 Cm2 in male and 16.75+2.08 Cm2, 13.36+1.01 Cm2 in female respectively.
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