Cone beam형 전산화단층영상을 이용한 상악동저와 상악제1대구치 치근단과의 위치관계 = Positional relationship between the maxillary sinus floor and the apex of the maxillary first molar using cone beam computed tomograph

다국어 초록 (Multilingual Abstract)

Purpose : To assess the positional relationship between the maxillary sinus floor and the apex of the maxillary first molar using cone beam computed tomograph (CBCT).
Materials and Methods : CBCTs from 127 subjects were analysed. A total of 134 maxillary first molars were classified according to their vertical and horizontal positional relationship to the maxillary sinus floor and measured according to the distance between the maxillary sinus floor and the maxillary first molar.
Results : Type III (The root projected laterally on the sinus cavity but its apex is outside the sinus boundaries) was dominated between 10 and 19 years and type I (The root apex was not in contact with the cortical borders of the sinus) was dominated (P＜0.05) between 20 and 72 years on the vertical relationship between the maxillary sinus floor and the apex of the maxillary first molar. The maxillary sinus floor was located more at the apex (78.2%) than at the furcation (21.3%) for the palatal root. The distance from the root apex to the maxillary sinus floor confined to type I was increased according to the ages (P＜0.05). Type M (The maxillary sinus floor was located between the buccal and the palatal root) was most common (72.4%) on the horizontal relationship between the maxillary sinus floor and the apex of the maxillary first molar.
Conclusion : CBCT can provide highly qualified images for the maxillary sinus floor and the root apex of the maxillary first molar.

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