• 대한소아치과학회지
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• 제51권1호
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• pp.11-21
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• 2024

This study aimed to analyze the prevalence and severity of infraoccluded primary molars (IPM) and their correlation with the agenesis of permanent successors (APS). A total of 4,011 panoramic radiographs from children aged 4 to 11 years who had all 8 primary molars were examined. The prevalence of APS was analyzed based on the severity and tooth type of IPM. The prevalence of IPM was 13.0%, and there was no difference between genders. The majority of the children had two IPMs each. In all tooth types, mild infraocclusion was the most prevalent, whereas severe infraocclusion was the least frequent. Among the types of primary molars, the lower primary first molar (62.3%) was the most affected, followed by the lower primary second molar (27.7%), the upper primary second molar (5.8%), and the upper primary first molar (4.2%). Infraocclusion was 11.2 times more prevalent in the mandible than in the maxilla, with no significant difference between the left and right sides. The correlation between IPM and APS was also investigated. Among the subjects, 177 had one or more agenesis of premolars, of whom 54 (30.5%) had IPM. Additionally, among the 521 individuals with IPM, 54 individuals exhibited APS (10.4%). This study identified a noteworthy prevalence of infraocclusion, with notable variations among molar types. The LPFM was particularly affected. The majority of cases were classified as mild in severity. Furthermore, a compelling association between IPM and APS was established. Understanding this connection may enhance treatment strategies for infraoccluded teeth and tooth agenesis.

• 구강회복응용과학지
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• 제33권2호
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• pp.143-153
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• 2017

치아 외상에 따른 흔한 합병증 중 하나는 치아 유착이다. 성인과 달리 성장기 아동에서 유착이 나타날 경우 유착치가 인접 치조골의 성장을 방해하여 치조골의 발육 부전과 이에 따른 개방 교합을 야기한다. 그러나 저위된 유착치를 단순 발치할 경우, 성장 완료 시까지 치조제의 상당한 소실을 유발하여 향후 심미적인 보철물을 수복하기가 어려워진다. 본 증례에서는 성장기에 상악 전치의 유착이 발생한 환자에서 단일 치아 골절단술 후 치조골 신장술과 치관 절제술을 시행하여 상악 전치부의 유착치를 심미적으로 결과를 얻었으므로 소개하고자 한다.