Assessment of anatomical relationship between upper posterior molars and maxillary sinus floor using Cone-beam Computed Tomography

Mehanny, Mohamed; Mansour, Soad; Alabduljabar, Wateen; Alsalamah, Nuha; Almunsser, Lama; Alshehri, Rola; Basha, Soha M

doi:10.21608/edj.2025.371207.3427

	Assessment of anatomical relationship between upper posterior molars and maxillary sinus floor using Cone-beam Computed Tomography
Egyptian Dental Journal
Volume 71, Issue 3, July 2025, Page 2127-2133 PDF (914.02 K)
Document Type: Original Article
DOI: 10.21608/edj.2025.371207.3427
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Authors
Mohamed Mehanny ¹; Soad Mansour ²; Wateen Alabduljabar ³; Nuha Alsalamah ⁴; Lama Almunsser ⁵; Rola Alshehri ⁵; Soha M Basha ⁶
¹Assistant Professor, Basic Dental Sciences Department, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
²Professor, Basic Dental Sciences Department, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.
³Dental Interns, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.
⁴Dental Interns, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
⁵Dental Interns, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.
⁶Associate 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.
Keywords
CBCT; Maxillary Sinus Floor; Upper Molars


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