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KMID : 0363020060360020461
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Journal of Korean Academy of Periodontology
2006 Volume.36 No. 2 p.461 ~ p.471
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Radiographic evaluation of alveolar bone profile of maxillary anterior teeth in Korean young adult
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서효석
정진형/임성빈/홍기석
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Abstract
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In order to achieve a satisfactory esthetic result of periodontal surgery or implant in maxillary
anterior area, periodontists must be aware of normal alveolar bone anatomy. The purpose of this
study was to evaluate the relationship of alveolar bone morphology to tooth shape and form.
78(mean age : 25 yrs) periodontally healthy volunteers participated in this study. Two maxillary
central incisor and one lateral incisor were selected to study. With minimal local anesthesia, gutta-percha cone inserted to labial gingival sulcus of selected teeth just after bone sounding with periodontal probe. Metal ball (4mm diameter) attached to palatal fossa of central incisor. Then, periapical radiograph was taken according to long cone paralleling technique. After film scan, labial alveolar bone profile reproduced along interproximal bone and apical ends of gutta-percha cones on
computer screen. By utilizing computer program, the distance from height of interproximal bone to
the labial bone crest in central incisor-central incisor and central incisor-lateral incisor area was
measured and converted to real distance by using vertical length of metal ball on film. After measuring crown length & width of central incisor, the 10 individuals ranked lowest CW/L ratio (crown
width/length ratio) and the 10 ranked highest were selected as having a long-narrow(group N), or a
short-wide(group W) form of the central incisors. Means of the distance from height of interproximal
bone to the labial bone crest of group N, W were calculated and compared by means of independent
t-test.
The results were as follows:
1. Mean distance from the height of the interproximal bone to the labial bone crest was
3.5±0.7mm between two central incisor, and 2.8±0.6mm between central and lateral incisor.
2. Mean CW/L ratio of group N was 0.57, and group W was 0.8. Mean distance from the height of
the interproximal bone to the labial bone crest of group N was higher than group W in both measured area(measurements of group N, W were 3.9±0.2mm and 3.5±0.2mm between two
central incisor, 3.0±0.2mm and 2.8±0.2mm between central and lateral incisor), but there
were no statistically significant differences when the groups were compared.
Within the limits of the present study, there was a tendency that subjects with long-narrow teeth
have more scalloped alveolar bone profile than subjects with short-wide teeth in upper anterior area,
but no statistically significant differences were found.2
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KEYWORD
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alveolar bone profile, interproximal bone, maxillary anterior teeth
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