Estrela Carlos, Nunes Carla A B C M, Guedes Orlando Aguirre, Alencar Ana Helena G, Estrela Cynthia R A, Silva Ricardo Gariba, Pécora Jesus Djalma, Sousa-Neto Manoel Damião
Department of Stomatologic Sciences, Dental School, Universidade Federal de Goiás, Goiânia, GO, Brazil.
Department of Oral Sciences, Dental School, Universidade de Cuiabá, Cuiabá, MT, Brazil.
Braz Dent J. 2016 Jan-Feb;27(1):9-15. doi: 10.1590/0103-6440201600679.
This study evaluated the anatomical relationship between posterior teeth root apices and maxillary sinus floor (MSF) on 202 cone beam computed tomography (CBCT) exams. The distance between the root apices and the MSF, as well as the MSF thickness of the cortical bone closest to root apices and furcation regions were measured. The vertical and horizontal relationships of the MSF with the molar roots were classified into categories adapted from the criteria proposed by Kwak et al. (14). The shortest distances between MSF and the root apices were observed in the mesiobuccal root of the second molar (0.36±1.17 mm) and the palatal root of the first molar (0.45±1.10 mm) and the widest in buccal roots of the first premolars (5.47±4.43 mm). Significant differences were observed between the distance of MSF to the root apices of single-rooted first and second premolars. The cortical thickness ranged from 0.65±0.41 mm over the mesiobuccal root of the second molar to 1.28±0.42 mm over the buccal root of the first premolar. The most observed vertical and horizontal relationships were type II and 2H, respectively. The maxillary molar roots showed greater proximity to the MSF. The thickness of the MSF cortical bone closest to the apices and furcation regions was found to be similar only for premolars.
本研究通过202例锥形束计算机断层扫描（CBCT）检查，评估了后牙牙根尖与上颌窦底（MSF）之间的解剖关系。测量了根尖与MSF之间的距离，以及最靠近根尖和根分叉区域的皮质骨的MSF厚度。根据Kwak等人（14）提出的标准，将MSF与磨牙牙根的垂直和水平关系进行了分类。在第二磨牙的近中颊根（0.36±1.17 mm）和第一磨牙的腭根（0.45±1.10 mm）中观察到MSF与根尖之间的最短距离，而在第一前磨牙的颊根中距离最宽（5.47±4.43 mm）。在单根第一和第二前磨牙的根尖到MSF的距离之间观察到显著差异。皮质厚度范围从第二磨牙近中颊根上方的0.65±0.41 mm到第一前磨牙颊根上方的1.28±0.42 mm。最常观察到的垂直和水平关系分别为II型和2H型。上颌磨牙牙根与MSF的距离更近。仅在前磨牙中，发现最靠近根尖和根分叉区域的MSF皮质骨厚度相似。
