2016, Vol.43, No.1

Journal of the Korean academy of pediatric dentistry 2023 KCI Impact Factor : 0.48

pISSN : 1226-8496 / eISSN : 2288-3819
https://journal.kci.go.kr/jkapd

The developmental age of permanent teeth was evaluated in children and adolescents according to age and gender using the Nolla Method. A retrospective study was performed on panoramic radiographs of 1,200 subjects aged 4-15 years, including 50 children for each age/gender group. Three well-trained examiners estimated the developmental stage of upper and lower permanent teeth using the Nolla Method. The inter-examiner reliability was excellent (intra-class correlation coefficient value = 0.973). The mean developmental age was calculated. In boys, Nolla stage 6, indicated by crown completion, was seen in the central incisor, lateral incisor, canine, first premolar, second premolar, first molar, and second molar at 5.4, 6.4, 6.7, 7.5, 7.8, 4.6, and 8.1 years, respectively, in the maxilla and at 4.8, 5.1, 6.0, 6.5, 7.2, 4.5, and 8.0 years, respectively, in the mandible. In girls, Nolla stage 6 was seen at 5.3, 6.0, 6.3, 7.3, 7.7, 4.8, and 8.1 years, respectively, in the maxilla and at 4.8, 5.1, 5.9, 6.5, 7.2, 5.0, and 7.9 years, respectively, in the mandible. In this study, the developmental age of permanent teeth was evaluated in Korean children and adolescents who visited Yonsei University Dental Hospital. This study may be helpful in diagnosis and treatment planning in the clinic.

Early colonization of periodontal pathogens has been related as a risk indicator for the subsequent development of periodontal disease. Such colonization can be easily detected with mediums like saliva and plaque. This study aimed to evaluate the prevalence of the bacteria associated with periodontal disease in saliva and plaque in healthy children and adolescents. The experiment was conducted using 90 samples from subjects consisting of thirty elementary school students, thirty high school students and thirty adults. PCR was used to detect the prevalence and distribution of five periodontal pathogens in the collected saliva and plaque. The detected periodontal pathogens are as follows: A. actinomycetemcomitans, P. gingivalis, T. forsythia, F. nucleatum and P. intermedia. Periodontal pathogens were prevailed in a higher number of adolescents than the number of children. A. actinomycetemcomitans and P. intermedia were detected the most in the adolescents group. T. forsythia and F. nucleatum were detected the most in the children group. The overall result showed that saliva is more a useful medium than supragingival plaque. The detection of high risk periodontal pathogens in children and adolescents without clinical signs of periodontal disease can emphasize the importance of the early diagnosis and preventive approach.

The use of a rubber dam is a useful technique for protecting patients and operators, producing good results when treating children and adolescent patients. Despite its many advantages, some children and adolescent patients have negative feelings and sometimes express its discomfort. The purpose of this study was to evaluate the patients’preferences for rubber dam use and the associated factors that may affect it. A survey was conducted targeting patients aged 4-18 years old who visited the pediatric dental clinic, the restorative dental clinic, or the student treatment dental clinic of OO University Dental Hospital, and were treated using a rubber dam without sedation. We collected questionnaires through electronic medical records. Most children and adolescent patients showed positive attitudes towards using rubber dams. The group with a short treatment time and the group with past knowledge or experience of rubber dam use showed more positive attitudes towards rubber dams (p < 0.05), while no significant difference was found among factors such as gender, age, procedure, anesthetics, treatment site, and operator (p > 0.05).