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.

Assessment of Proximity of Maxillary Molars Roots to the Maxillary Sinus Floor in a Sample from the Egyptian Population using Cone-beam Computed Tomography (Hospital Based Study)

“…Searching the literature for studies discussing the proximity of maxillary molars roots to MSF using CBCT, several studies have been found but none of them was conducted on Egyptian subjects. Hence, as long as differences in ethnicity characteristics could invite diversity in such anatomical relationship 31 , it was mandatory to assess this relationship in Egyptian subjects to explore the similarity with the other examined populations.…”

Common Operative Procedural Errors and Clinical Factors Associated with Root Canal Treatment

“…Map-reading strategy in CBCT images reduces problems associated to overlapping of anatomical structures (43). The navigation dynamics favors a precise identification of roots position, frequency of root canals, presence of the isthmus and apical foramina (53,54). The root apices of the maxillary posterior teeth and the maxillary sinus floor may present intimate relationship that favors development of inflammatory, infectious and/or traumatic alterations in the maxillary sinus (MS) or vice-versa (55)(56)(57)(58)(59).…”

“…The root canal filling material must be contained only inside the root canal, there is no way to justify its presence beyond the root canal (12,35,36,40,41). In mandibular and maxillary molars, it is necessary to take care to avoid lead filling materials into mandibular canal and maxillary sinus, due the proximity of these anatomic structures with root apexes (53,58).…”

Sinusite odontogênica: uma revisão de literatura

“…[12][13][14][15][16] Entretanto, não existem estudos que associem a proximidade dos dentes superiores posteriores com o seio maxilar em pacientes diagnosticados com sinusite maxilar.…”

“…Estrela et al 16 estudaram a relação anatômica entre os ápices dos dentes posteriores superiores e a mucosa do seio maxilar através da TCFC e observaram que a menor distância entre o assoalho do seio maxilar e os ápices dentários foi observada na raiz mesiovestibular do segundo molar e na raiz palatina do primeiro molar. A maior distância foi observada na raiz vestibular do primeiro pré-molar com diferença estatística significante.…”