Journal of Periodontal and Implant Science

Korean Academy of Periodontology (대한치주과학회)
권호 표지

Clinical features of the gingiva according to maxillary anterior teeth form in adult

성인 상악 전치 형태에 따른 치은의 임상적 소견

  • An, Chi-Hyun (Department of Periodontology and Research Institute of Oral Bio-Science, Chonbuk National University) ;
  • Heo, Soo-Rye (Department of Periodontology and Research Institute of Oral Bio-Science, Chonbuk National University) ;
  • Cho, Ik-Hyun (Department of Periodontology and Research Institute of Oral Bio-Science, Chonbuk National University) ;
  • Kim, Hyung-Seop (Department of Periodontology and Research Institute of Oral Bio-Science, Chonbuk National University, College of Dentistry, Chonbuk National University)
  • 안치현 (전북대학교 치과대학 치주과학교실) ;
  • 허수례 (전북대학교 치과대학 치주과학교실) ;
  • 조익현 (전북대학교 치과대학 치주과학교실) ;
  • 김형섭 (전북대학교 치과대학 치주과학교실, 전북대학교 구강생체과학 연구소)
  • Published : 2005.06.30
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Abstract

It has been suggested that morphologic characteristics of the periodontium are partly related to the shape and form of the teeth. Furthermore, the severity of symptoms of periodontal disease have been proposed to differ among these various morphologic entities or "biotypes". The purpose of the present study was to examine the relationship between the form of the crowns in the maxillary anterior tooth segment and (1) a group of morphological characteristics and (2) the thickness of the gingiva. The thickness of gingiva was measured by ultrasonic device(SDM). 100 subjects devoid of symptoms of destructive periodontal disease were examined regarding, e.g., probing depth, gingival recession, width of keratinized gingiva, thickness of the keratinized gingiva. From maxillary study cast, the width(at the apical third-CW) and the length(CL) of the crowns of the 6 anterior teeth were determined. A CW/CL-ratio was calculated for each tooth and averaged for each tooth region. The individual mean CW/CL-ratio values for the central incisors were ranked. The 10 subjects ranked highest and the 10 ranked lowest were selected as having either a long-narrow(group N) or a short-wide(group W) form of the crown of the tooth. The data for each of the examined parameters were averaged for each tooth region in each subject and mean values for subjects in groups W and N were compared using the Student t-test. Stepwise multiple regression analysis, including data from the whole sample, was performed for each tooth region with the thickness of the free gingiva as the dependent variable. The results from the analyses demonstrated that individuals with a long-narrow form of the central incisors displayed, compared to individuals with a short-wide crown, form (l) a narrow zone of keratinized gingiva, (2) a pronounced "scalloped" contour of the gingival margin. There was no significant difference between groups N and W with respect to the thickness of the keratinized gingiva. The CW/CL-ratio data revealed that a certain form of the crowns in the central incisors was accompanied by a similar form in the lateral incisors and canine tooth region. The regression analyses demonstrated that the thickness of the keratinized gingiva in central, lateral incisors and canines was significantly related to the width of the keratinized gingiva.

Keywords

References

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