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韓國人 永久中切齒의 殷서別 續出時期에 關한 硏究

A STUDY ON THE ERUPTION TIME OF PERMANENT CENTRAL INCISOR WITH THE ERUPTION PHASES IN KOREAN

대한구강내과학회지 1979년 4권 1호 p.22 ~ 30
김영구,
소속 상세정보
김영구 (  ) - 서울대학교 의과대학 부속병원 구강진단과

Abstract


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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