• Journal of Korea Multimedia Society
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• v.16 no.10
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• pp.1135-1146
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• 2013

In this paper, we proposed a new algorithm for individual tooth region segmentation on tooth color images. The proposed algorithm used oral cavity model based on structural feature of tooth and new boundary of watershed algorithm. First, the gray scale image is obtained with emphasized tooth regions from the color images and unnecessary regions are removed on tooth images. Next, the image enhancement of tooth images is implemented using the proposed oral cavity model, and the individual tooth regions are segmented by watershed algorithm on the enhanced images. Boundary and seeds necessary to watershed algorithm are applied boundary of binary image using minimum thresholding and region maximum value. In order to evaluate performance of proposed algorithm, we conduct experiment to compare conventional algorithm with proposed algorithm. As a result of experiment, we confirmed that the proposed algorithm is more improved detection ratio than conventional algorithm at molar regions and the tooth region detection performance is improved by preventing overlap detection on oral cavity.

• Journal of Oral Medicine and Pain
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• v.24 no.3
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• pp.301-313
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• 1999

구강안면동통 환자의 치료법으로 널리 쓰이는 전기요법은 연조직과 신경계 구조물에 대한 치료 시 중요한 역할을 담당하고 있다. 저자는 현재 구강안면동통의 치료법으로 널리 쓰이고 있는 전기요법들 중 경피성 신경자극(Transcutaneous electric nerve stimulation)과 전기침자극요법(Electroacupuncture stimulation therapy)이 각각의 신경섬유에 미치는 효과를 평가하고자 정상 성인 남녀 29명에게 경피성 신경자극 및 전기침자극을 시행하고 시행 전 및 시행 후 삼차신경 영역의 3가지 종류($A{\beta}$, $A{\delta}$, C fiber)의 신경섬유의 전류인지역치(CPT) 변화를 측정하여 그 차이점을 분석하였으며 이를 대조군과 비교하였다. 경피성 신경자극 및 전기침자극 모두에서 대조군에 비해 삼차신경 영역의 모든 신경섬유에 걸쳐 고른 전류인지역치의 증가를 나타내었으며, 경피성 신경자극과 전기침자극 후의 전류인지역치 변화량은 서로 유의할만한 차이를 나타내지 않았다. 이는 경피성 신경자극 과 전기침자극 모두 3가지 종류($A{\beta}$, $A{\delta}$, C fiber)의 감각신경섬유의 전류인지역치에 영향을 미치며, 구강안면동통의 감소에 효과적으로 사용될 수 있으리라 생각된다.

• The Journal of the Korean dental association
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• v.26 no.7 s.230
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• pp.651-660
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• 1988

• The Journal of the Korean dental association
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• v.27 no.9 s.244
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• pp.819-828
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• 1989

• The Journal of the Korean dental association
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• v.23 no.12 s.199
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• pp.1011-1016
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• 1985

• The Journal of the Korean dental association
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• v.8 no.9
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• pp.531-534
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• 1970

• The Journal of the Korean dental association
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• v.16 no.11 s.114
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• pp.812-821
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• 1978

• The Journal of the Korean dental association
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• v.13 no.4
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• pp.287-288
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• 1975

• The Journal of the Korean dental association
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• v.8 no.6
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• pp.455-458
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• 1970

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.4873-4880
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• 2010

This study adopted two instruments, i.e. Oral Health Impact Profile-14 (OHIP-14: index of patient's subjective oral health impact) and Todai Health Index (THI: index of patient's subjective systemic health) The Purpose of this study was to determine potential effects of oral health upon systemic health and quality of life (QOL) and provide required basic reference data for developing oral diseases prevention program and public oral health improvement As a result, it may contribute to improving health and quality of life in local community. Analysis on OHIP for subjective oral health conditions revealed that there were significant differences among all categories of self-aware oral health conditions on statistic basis and good oral health group showed significantly higher total OHIP points (4.33) than any other group. Analysis on THI for subjective oral health conditions showed that there were significant differences among all categories of self-aware oral health conditions on statistical basis and very good oral health group got higher total THI points (3.83) than any other group. Analysis on QOL for subjective oral health conditions suggested that there were significant differences among all categories of self-aware oral health conditions but social category and good oral health group got highest total QOL points (3.39) of all groups.