6. 하악치의 면적에 있어서 현대인과 별차가 없으나 견치, 제1대구치에서는 현대인보다 다소 크게 나타났다.
7. 치아우식증은 총 68개의 피검유치 중 19개의 치아에서 나타났으며, 인접면의 치아우식증이 가장 많았다. 또한, 총 146개의 피검영구치중 34개의 치아에서 나타났으며 인접면 치아우식증이 가장 많았다.
8. 치아교모의 정도가 심하며 특히 유치에서 현대인과 다른 심한 교모현상을 보였다.
9. 치아협면의 선조흔은 협면의 교합면쪽 1/3부위에서 주로 관찰되었으며, 나타난 선조흔들은 대개가 수직방향을 이루고 있다.
[영문]
With regard to the prehistoric jawbones and teeth of Yongchon-ni, the author studied the morphology of the jawbones and teeth, dental caries, degree of occlusal attrition and the striations on the buccal surface of the maxillary posterior teeth.
The results are as follows:
1. In comparison of the mandibule size, there was lithe difference between the mordern human mandible and Yongchon-ni mandible.
2. The development of mental eminences were prominent.
3. In the size of anterior dental arch breadth, maximum anterior dental arch breadth, dental arch breath, maximum arch breadth, anterior dental arch length and dental arch length of mandible, the sizes of the above measurements in Yongchon-ni
mandibles were greater than the mordern human mandible.
4. The distribution of the positions of mental foramens ranged from first premolar to second molar evenly.
5. The directions of mental foramens were posterio-superior direction.
6. The shovelling of the maxillary incisors were prominent.
7. In comparison of the area of the mandibular teeth, there was little difference between the mordern human teeth and the Yongchon-ni teeth.
8. In the examination of the dental caries,19 out of the 68 primary teeth examined were decayed, and 34 out of the 146 permanent teeth examined were decayed. The above dental caries were found mostly on the proximal surface.
9. The degrees of occlusal tooth attrition were mostly surface.
10. The striations on the buccal surface of the maxillary posterior teeth were found mostly on the occlusal 1/3 of the buccal surface and directed vertically.