Earticle

초록

영어

Purpose: This study aims to investigate the cusp variation pattern of the Korean mandibular second premolar and to determine the difference in tooth diameter and surface area using a virtual three-dimensional model. Methods: Dental casts from 69 students were scanned as a virtual dental models with a three-dimensional dental model scanner. Tooth diameter, absolute and relative individual areas, total crown area, the number of lingual cusps and central groove pattern were analyzed using RapidForm 2004. The Mann–Whitney U-test and the Kruskal–Wallis test were performed to verify sexual dimorphism, the difference in tooth diameter and surface according to the cusp variation pattern (α=0.05). Results: There was no significant difference except in buccolingual diameter (p<0.05) and buccolingual diameter at the cervix (p<0.05). The relative surface area of the total clinical crown was 65.76% for the buccal half and 34.24% for the lingual half, with a ratio of 2:1. In the case of the presence of two lingual cusps, the ratio was 21.47% for the mesiolingual half and 14.12% for the distaolingual half, with a ratio of 3:2. The dominant central groove patterns of the second premolar were the H-pattern (42.0%), followed by the Y-pattern (37.7%), then the U-pattern (20.3%). The relative buccal half was largest in the U-pattern central groove and the relative lingual half was largest in the Y-pattern central groove (p<0.05). Conclusion: This study is significant in that it measured quantitative surface areas and the findings could be a meaningful reference to comprehend dental anatomy in Koreans.

목차

Abstract
INTRODUCTION
MATERIALS AND METHODS
1. 모형 준비 및 3차원 가상모형 재구성
2. 하악 제2소구치 치관의 직경 분석
3. 하악 제2소구치의 치관의 표면적 분석
4. 교두 변이 양상에 따른 하악 제2소구치의 분류
5. 통계분석
RESULTS
1. 하악 제2소구치의 직경 및 표면적 측정값
2. 교두 변이에 따른 교합면의 분류
3. 교두 변이에 따른 하악 제2소구치의 측정값 비교
DISCUSSION
CONCLUSIONS
CONFLICT OF INTEREST
ORCID
REFERENCES

키워드

저자

• 남신은 [ Shin-Eun Nam | 원광보건대학교 치기공과 ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한치과기공학회지 [THE JOURNAL OF KOREAN ACADEMY OF DENTAL TECHNOLOGY]

• 간기

  계간

• pISSN

  1229-3954

• eISSN

  2288-5218

• 수록기간

  1979~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 515 DDC 617