2019 年 18 巻 1 号 p. 22-26
Odontogenic maxillary sinusitis primarily results from multiplication of bacteria secondary to dental infection. Since the maxillary premolar and molar roots have the closest proximity to the antral floor, periodontitis of these teeth is the most common cause of odontogenic maxillary sinusitis. The purpose of this study was to evaluate the association between alveolar bone height around the maxillary molar and mucosal thickening of the maxillary sinus using computed tomography(CT)images. We reviewed 679 maxillary sinuses [age 20-92] on CT images performed for dental implant surgery planning or suspected maxillary sinusitis in our department from August 2016 to October 2017. An anatomical relationship between the teeth and maxillary sinus was classified into the following four groups based on the space between the alveolar crest and sinus floor: Group
1, ≧10 mm; Group 2, 7-10 mm; Group 3, 4-7 mm; and Group 4, < 4 mm. CT images were evaluated for mucosal thickening (> 2 mm) of the maxillary sinus floor. There was significant difference of the prevalence of mucosal thickening of maxillary sinus between Groups 1 and 3 and between Groups 1 and 4(P<0.01). The highest incidence of mucosal thickening was seen in Group 4. Our results suggest that alveolar bone height decreasing can increase of mucosal thickening of maxillary sinus.
