Abstract
ObjectivesTo describe the relationship between maxillary sinus (MS) and upper teeth based on cone beam computed tomographic scans (CBCT).Materials and methodsBased on CBCT maxillary imaging data of 147 patients, distance between MS and apices of canines and posterior maxillary teeth were assessed. Distances between tooth roots and sinus were classified into three groups: distant (>2 mm), close (<2 mm) or in contact with MS. Teeth with apical lesions and uncommon root configurations were excluded.ResultsIn total, 1075 teeth of maxillary canines, upper premolars and upper molars were included in this study. Teeth most often in contact with MS were the second (89%) and first (81%) maxillary molar without any significant difference (p = 0.19). Roots most often in contact with MS were the mesiobuccal and distobuccal root of the second molar (85% and 76%; p = <0.01) followed by the palatal root of the first molar (73%). A fifth of the upper canines are situated less than 2 mm from MS.ConclusionsMore than four out of five upper molars (first and second) are in a close relationship to the MS. Knowledge of the anatomical relationship between posterior maxillary teeth and the MS is important for diagnosis and treatment in this area.
Highlights
The oral cavity is situated in a close relationship with several other anatomic structures of importance in the head - neck area
40% of unilateral maxillary sinusitis cases have a dental origin whereas the number is 24% for bilateral maxillary sinusitis cases (Vestin Fredriksson et al, 2017)
The volumes were classified according to the Field of view (FOV) in small 8 x 8cm (n = 42)
Summary
The oral cavity is situated in a close relationship with several other anatomic structures of importance in the head - neck area. An improved understanding of the relationship between canines and posterior maxillary teeth (PMT) and maxillary sinus (MS) is of value for dentists and oral surgeons who regularly perform treatments in this area. Considering a close proximity between the apices of PMT and the MS, a dental infection may spread into the MS. 40% of unilateral maxillary sinusitis cases have a dental origin whereas the number is 24% for bilateral maxillary sinusitis cases (Vestin Fredriksson et al, 2017). Some examples of dental causes are apical infections and adult periodontal breakdown (Vestin Fredriksson et al, 2017). The likelihood for a sinusitis of dental origin increases due to a closer relationship between the infected root and the MS (Mehra & Murad, 2004). A thorough knowledge of the relationship between upper canines, posterior teeth and MS is of
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