Evaluation of the maxillary third molar position and its relationship with the maxillary sinus: a CBCT study
Autor: | Abubekir Harorli, Omer Demirtas |
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Rok vydání: | 2015 |
Předmět: |
Orthodontics
Molar Cone beam computed tomography Maxillary sinus business.industry Sinus perforation Dentistry 030206 dentistry Mandibular second molar 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure stomatognathic system Close relationship Oral and maxillofacial surgery Medicine Radiology Nuclear Medicine and imaging Dentistry (miscellaneous) 030223 otorhinolaryngology business Sinus (anatomy) |
Zdroj: | Oral Radiology. 32:173-179 |
ISSN: | 1613-9674 0911-6028 |
DOI: | 10.1007/s11282-015-0228-2 |
Popis: | The present study investigated the position and relationship of the maxillary third molars to the maxillary sinus. These molars were detected to have a close relationship with the maxillary sinus based on panoramic images, using cone-beam computed tomography (CBCT). This retrospective study evaluated 162 impacted third molars from 100 patients that showed a superimposed relationship between the maxillary sinus and third molars on panoramic images obtained from CBCT. CBCT images were used to assess the horizontal (buccopalatal) and vertical positions of the maxillary sinus relative to the maxillary third molars, proximity of the roots to the sinus, and angulation and depth of the third molars. The associations among the angulation, depth of third molars, and horizontal and vertical positions of the maxillary sinus relative to the third molar findings were examined using Chi square tests. Based on the winter classification, the most frequent tooth position was vertical (59.9 %), followed by mesioangular (14.2 %), distoangular (9.9 %), and others. Most impacted teeth were at the level between the occlusal and cervical levels of the adjacent second molar. Regarding the relationships of the maxillary third molars with the maxillary sinus examined on CBCT, vertical type III (buccal root related with maxillary sinus) (34 %) and horizontal type 2 (maxillary sinus located between roots) (64.8 %) were seen most frequently. The relationship between the maxillary sinus and third molar roots should be considered during extraction. When a risk of sinus perforation is predicted in an extraction, a presurgical CBCT examination could be valuable. |
Databáze: | OpenAIRE |
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