성인 상악 전치 형태에 따른 치은의 임상적 소견
Clinical features of the gingiva according to maxillary anterior teeth form in adult
소속 상세정보
안치현
허수례/조익현/김형섭
KMID : 0363020050350020359
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 (1) 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.
키워드
gingival thickness;periodontal biotype;gingival characteristics
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