Imaging Sci Dent.  2016 Jun;46(2):109-115. 10.5624/isd.2016.46.2.109.

Prevalence of bony septa, antral pathology, and dimensions of the maxillary sinus from a sinus augmentation perspective: A retrospective cone-beam computed tomography study

Affiliations
  • 1Department of Oral and Maxillofacial Radiology, University of Connecticut, School of Dental Medicine, Farmington, CT, USA. tadinada@uchc.edu
  • 2Section of Periodontology, University of Connecticut, School of Dental Medicine, Farmington, CT, USA.
  • 3Department of Prosthodontics, University of Connecticut, School of Dental Medicine, Farmington, CT, USA.
  • 4Department of Pediatric Dentistry, University of Connecticut, School of Dental Medicine, Farmington, CT, USA.
  • 5Division of Periodontology, University of Dammam, College of Dentistry, Dammam, Saudi Arabia.

Abstract

PURPOSE
Sinus elevation procedures have become a routine and reliable way to gain bone volume in the edentulous maxilla for dental implant placement. Presence of bony septations and pathology in the maxillary sinus often cause complications leading to graft or implant failure or both. The aim of this study was to retrospectively evaluate the prevalence of pathology, direction of the septa, and sinus width measured at 2 mm, 5 mm, and 10 mm from the sinus floor in maxillary sinuses using cone-beam computed tomography (CBCT).
MATERIALS AND METHODS
Seventy-two sinuses from 36 random preoperative CBCT scans referred for implant therapy were retrospectively evaluated for the number, prevalence, and direction of bony septations and presence of pathology. Width of the sinus was also measured at 2 mm, 5 mm, and 10 mm from the sinus floor to account for the amount of bone available for implant placement.
RESULTS
Maxillary sinus septa were found in 59.7%. Presence of a single septum was noted in 20 sinuses (27.7%), followed by two septa in 17 sinuses. The most common direction of the septum was the transverse direction. Retention pseudocyst and mucosal thickening were the most commonly seen abnormality/pathology.
CONCLUSION
Based on the high prevalence of septa and sinus pathology in this sample, a preoperative CBCT scan might be helpful in minimizing complications during sinus augmentation procedures for dental implant therapy.

Keyword

Cone-Beam Computed Tomography; Dental Implants; Maxillary Sinus

MeSH Terms

Cone-Beam Computed Tomography*
Dental Implants
Maxilla
Maxillary Sinus*
Pathology*
Prevalence*
Retrospective Studies*
Transplants
Dental Implants

Figure

  • Fig. 1 Septa are seen on an axial (A) and coronal (B) section images.

  • Fig. 2 A. Maximum disto-medial dimension is measured at 10 mm cranial to the floor of the sinus in coronal section. B. Maximum antero-posterior dimensions at 10 mm cranial to the floor of the sinus is measured on the sagittal section. C. Maximum width at 10 mm cranial to the floor of the sinus is measured in axial section.


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