The Apico-Coronal and Mesio-Distal Positions of the Gingival Zenith in the Maxillary Anterior Dentition

상악 전치부에서 치은 정점의 근원심적, 수직적 위치

  • Choi, Jung-Yun (Department of Prosthodontics, School of Dentistry, Chonbuk National University) ;
  • Seong, Dong-Hwan (Department of Prosthodontics, School of Dentistry, Chonbuk National University) ;
  • Song, Kwang-Yeob (Department of Prosthodontics, School of Dentistry, Chonbuk National University) ;
  • Park, Ju-Mi (Department of Prosthodontics, School of Dentistry, Chonbuk National University) ;
  • Ahn, Seung-Geun (Department of Prosthodontics, School of Dentistry, Chonbuk National University)
  • 최정윤 (전북대학교 치과대학 보철학교실) ;
  • 성동환 (전북대학교 치과대학 보철학교실) ;
  • 송광엽 (전북대학교 치과대학 보철학교실) ;
  • 박주미 (전북대학교 치과대학 보철학교실) ;
  • 안승근 (전북대학교 치과대학 보철학교실)
  • Received : 2011.01.25
  • Accepted : 2011.03.25
  • Published : 2011.03.30

Abstract

The gingival zenith is the most apical point of the gingival outline. This study aimed to quantify the mesio-distal and apico-coronal displacements of gingival zenith in maxillary anterior dentition. 50 healthy patients, who ranged in age from 25 to 36 years were recruited for the study. Alginate impressions of the study group were made and poured with the type III stone. The gingival zenith positions of maxillary anterior teeth were measured in a mesial-lateral direction from the vertical bisected midline. The apico-coronal displacements of the gingival zenith of lateral incisors were measured from a line joining the gingival zeniths of the central incisor and canine. The gingival zeniths were distally displaced in 90%, 53% and 23% of the maxillary cetral incisors, lateral incisors and canines respectively. The mean distal displacements of the gingival zeniths to the vertical bisected midline of central incisors, lateral incisors and canines were 0.90 mm, 0.29 mm and 0.06 mm respectively. The gingival zeniths of lateral incisors were positioned $0.73{\pm}0.43$ mm coronally to the line joining the gingival zenith of central incisors and canines. Consideration of these findings may improve restorative procedures in the anterior maxillary dentition.

치은 정점이란 임상치관의 변연치은에서 가장 치근측인 지점을 말한다. 본 연구는 젊은 연령대의 한국 성인을 대상으로 상악 전치부에서 치은 정점의 근원심적, 수직적 위치를 수치화하려 하였다. 남성 25명, 여성 25명의 건강한 치주 조직을 갖는 평균나이 28.8세의 환자를 대상으로 하였다. 진단모형 상에서 치은 정점이 치아의 수직이등분선으로부터 근원심적으로 떨어져 있는 양을 측정하였다. 또한 측절치의 치은 정점이 중절치와 견치의 치은 정점을 연결하는 선으로부터 수직적으로 떨어져 있는 양을 측정하였다. 연구 결과 상악 중절치와 측절치의 치은 정점은 임상치관의 수직이등분선으로부터 원심에 위치하며 견치에서는 근원심적으로 같은 위치에 있는 경향이 있었다. 원심 위치의 빈도와 양은 중절치, 측절치, 견치 순으로 전방에 있는 치아일수록 컸다. 상악 측절치의 치은 정점은 중절치와 견치의 치은 정점을 연결하는 선으로부터 평균적으로 $0.73{\pm}0.43$ mm 치관측으로 위치하는 것으로 나타났다.

Keywords

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