CED-IADR/NOF Oral Health Research Congress, Madrid, İspanya, 19 - 21 Eylül 2019, ss.11
Objectives The aim of this study was to evaluate position of the maxillary third molar and the relationship between maxillary
third molar teeth and maxillary sinus by using images obtained from cone-beam computed tomography (CBCT) scans.
Methods In this retrospective and observational study, the maxillary third molar teeth of 147 patients, who applied to Cukurova
University Faculty of Dentistry underwent CBCT scanning for various reasons, were examined. Evaluated parameters were the
vertical position of the maxillary third molar teeth relative to the adjacent second molar teeth according to the Archer’s
classification, relationship between the roots of maxillary third molar teeth and the lower wall of the maxillary sinus according to
Winter’s classification. Pearson chi-square test was used for analysis. Significance level was determined as p = 0.05.
Results A total of 147 patients (74 females, 73 males) with a mean age of 33.32 ± 14.31 were included in the study. A total of
155 maxillary third molar teeth, 74 right and 81 left, were examined. In our study, the depth of the maxillary third molars were
the most common class A (58.1%), the most common vertical (31.6%) and horizontal (53.5%) relationship between the roots of
the maxillary third molars and the maxillary sinus was Type I. Also, the most common type of angulation according to Winter
classification was vertical position. No significant relationship was found between these classifications and gender or location
(right / left).
Conclusions The relationship between the maxillary third molars and the maxillary sinus should be carefully evaluated against
various complications risks, especially during the tooth extraction. Necessary precautions should be taken before surgical
procedures and CBCT scans should be used to assess the true relationship between maxillary sinus and maxillary third molar
roots during treatment planning.