Document Type : Original Article
Authors
1
Assistant Professor, Basic Dental Sciences Department, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
2
Professor, Basic Dental Sciences Department, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.
3
Dental Interns, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.
4
Dental Interns, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
5
Dental Interns, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.
6
Associate Professor, Basic Dental Sciences Department, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
Abstract
A thorough knowledge of the anatomical relation between upper molars teeth and maxillary sinus is critical for dentists to prevent complications while performing dental procedures. Such prior knowledge should be acquired via a precise radiological examination of the relationship between the roots of upper molars and the floor of maxillary sinus. Three‐ dimensional imaging modalities as Cone‐beam computed tomography may provide a solution to better visualize the complex representation of the anatomical relation between maxillary sinus floor and upper molars. Materials and methods: 110 CBCT scans belonging to 105 patients (42 males and 63 females) involving 248, including 69 upper first molars, 101 upper second molars and 78 upper third molars were collected from patients’ data base. The vertical relationship between the floor of maxillary sinus and roots of the examined teeth was evaluated on CBCT cross sectional images using “Jung classification” 2009. Results: As for the horizontal relationship, Type 1; 1B and 1BP were observed with the highest percentage of 33.12% for each with first maxillary molars, while 1BP was observed with the highest percentage with second and third maxillary molars (54.45%) and (61.44%) respectively. Regarding type 3, 3P was observed on all maxillary molars with the highest percentage. Conclusion: upper 2nd molars are the least close to the floor of maxillary sinus compared to the other molars, whereas 3rd molars (particularly palatal roots) are the most frequently communicated with the sinus floor. MSF is highly detectable interposed among the roots of upper 3rd molars followed by 2nd molars.
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