title: Study of Anatomical Relationship between Posterior Teeth and Maxillary Sinus Floor in a Subpopulation of the Brazilian Central Region Using Cone-Beam Computed Tomography - Part 2.
abstract: 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.
authors.affiliation: Department of Stomatologic Sciences, Dental School, Universidade Federal de Goiás, Goiânia, GO, Brazil.
authors.forename: Carlos
authors.initials: C
authors.lastname: Estrela
authors.affiliation: Department of Stomatologic Sciences, Dental School, Universidade Federal de Goiás, Goiânia, GO, Brazil.
authors.forename: Carla A B C M
authors.initials: CA
authors.lastname: Nunes
authors.affiliation: Department of Oral Sciences, Dental School, Universidade de Cuiabá, Cuiabá, MT, Brazil.
authors.forename: Orlando Aguirre
authors.initials: OA
authors.lastname: Guedes
authors.affiliation: Department of Stomatologic Sciences, Dental School, Universidade Federal de Goiás, Goiânia, GO, Brazil.
authors.forename: Ana Helena G
authors.initials: AH
authors.lastname: Alencar
authors.affiliation: Department of Stomatologic Sciences, Dental School, Universidade Federal de Goiás, Goiânia, GO, Brazil.
authors.forename: Cynthia R A
authors.initials: CR
authors.lastname: Estrela
authors.affiliation: Department of Restorative Dentistry, Dental School, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
authors.forename: Ricardo Gariba
authors.initials: RG
authors.lastname: Silva
authors.affiliation: Department of Restorative Dentistry, Dental School, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
authors.forename: Jesus Djalma
authors.initials: JD
authors.lastname: Pécora
authors.affiliation: Department of Restorative Dentistry, Dental School, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
authors.forename: Manoel Damião
authors.initials: MD
authors.lastname: Sousa-Neto
mesh_terms: D001938:Brazil; D054893:Cone-Beam Computed Tomography; D006801:Humans; D008443:Maxillary Sinus / Q000033:anatomy & histology*; D008963:Molar / Q000033:anatomy & histology*