Publication: Maxillary molar root protrusion into the maxillary sinus: a comparison of cone beam computed tomography and panoramic findings
Issued Date
2019-12-01
Resource Type
ISSN
13990020
09015027
09015027
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2-s2.0-85067401308
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Oral and Maxillofacial Surgery. Vol.48, No.12 (2019), 1570-1576
Suggested Citation
S. Themkumkwun, J. Kitisubkanchana, A. Waikakul, K. Boonsiriseth Maxillary molar root protrusion into the maxillary sinus: a comparison of cone beam computed tomography and panoramic findings. International Journal of Oral and Maxillofacial Surgery. Vol.48, No.12 (2019), 1570-1576. doi:10.1016/j.ijom.2019.06.011 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/50700
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Title
Maxillary molar root protrusion into the maxillary sinus: a comparison of cone beam computed tomography and panoramic findings
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Abstract
© 2019 International Association of Oral and Maxillofacial Surgeons This study aimed to examine the prevalence of molar roots protruding into the maxillary sinus and to determine the panoramic radiographic signs as correlated with cone beam computed tomography (CBCT). CBCT images of 354 roots were assessed and classified into three types, according to the relationship between the root and maxillary sinus. The prevalence of root protrusion into the maxillary sinus was calculated then the panoramic images assessed. After excluding some unidentified roots on the panoramic images, 200 were investigated for panoramic signs, including (i) projection of the root apex into the sinus cavity, (ii) interruption of the maxillary sinus floor's cortex, (iii) absence of periodontal ligament space, (iv) darkening of the involved root region, and (v) upward curving of the sinus floor. The respective correlation between the panoramic signs and CBCT types was assessed. Forty-six percent of roots showed protrusion into the sinus with the palatal root of the first molar having the greatest prevalence (33/200 roots). The panoramic signs ‘projection of the root apex in the sinus cavity’ and ‘darkening of the involved root apical region’ both strongly indicated root protrusion into the maxillary sinus (P < 0.05).