• Journal of Periodontal and Implant Science
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• 제28권4호
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• pp.785-797
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• 1998

This study has been done to prove that keratinized gingiva is required for the periodontal health and to analyse the adequate width that is necessary. Until now, the study on frenum has been documented on changing its location. But the location or the formation of the frenum has not been reported. This experiment has used 173 patients from the department of periodontology of Dankook University to investigate the width of keratinized gingiva, the formation of the frenum and its location for the frequency. This study also looks into the relationship between the gingival recession and the structure of the frenum, and affects they have on periodontal health. The width of the keratinized gingiva in the mandible has been found to be highest in the lateral incisor than in the central incisor. The width decreased from the canine to the first premolar until it reached the molar. The interproximal area of the mandibular frenum was 77.9%, which was greater than the frequency (22.1%) from the midline of the teeth. The highest frequency of frenum was at 30.6% in between the both central incisor then second greatest at 20.6% in between the right canine and the right first premolar. Frenum was not found in between the second premolar and the distal area. In the morphology of the frenum, it was found that 43.4% out of 551 parts were found to be a single narrow frenum, and the double or triple ligamented form of the complex frenum were found in similar frequency of 237 parts, but the broad frenum was rarely frequent. The incisal area was popular mostly with the single narrow frenum, the left premolar area frequented 57.4%, and the right premolar frequented 64.7%. Because the distance between the frenum apex and the gingival margin measured to be about 5mm or greater, the frenum apex started in the mucogingival junction and not just below the keratinized gingiva. In the 551 area investigated, 48.3% of gingiva showed recession, incisal area had recession the least at 44.9%, right buccal side at 47.4%, and right buccal side frequented the highest at 52.1%. The teeth that showed recession recessed at the average of 2.151.0.mm and the left canine showed the greatest amount of gingival recession. In the investigation to find out if the keratinized gingiva and the gingiva recession had mutually related somehow, the width of keratinized gingiva showed no affect on the probing depth, but had affected in the gingiva recession. This investigation showed that the gingival recession and the morphology of the frenum related in that, the single narrow frenum had recessed the least and the broad frenum recessed the most. With this analysis, a conclusion was drawn that the morphology of the frenum had affected in the gingical recession.

• 대한소아치과학회지
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• 제48권4호
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• pp.449-459
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• 2021

이 연구는 재생근관치료 결과에 영향을 줄 것으로 예상되는 인자를 후향적으로 분석하였다. 2011년 2월부터 2020년 1월까지 외상과 치외치 파절로 항생제 복합제제를 사용하여 재생근관치료를 시행한 54명의 환자와 57개의 치아를 대상으로 하였다. 의도적 출혈 여부, 치료원인, 치근발육단계에 따른 재생근관치료 결과를 분석하였다. 치료 결과는 증상의 개선, 치근단병소의 변화, 치근성장량을 토대로 판단하였다. 영상 촬영각도 및 위치에 의한 왜곡을 보정하기 위해 Turboreg plugin을 사용하였고, ImageJ softeware상에서 치근단공 크기, 치근면적, 치근길이의 변화를 측정하였다. 의도적 출혈 유무는 치료 결과에 유의한 영향이 없었다. 외상으로 인한 경우 치외치 파절로 인한 경우보다 치근면적과 치근길이의 증가가 적었다. 치근발육이 덜 진행된 치아일수록 치근면적의 성장이 크게 나타났다.