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. 2019 Jul 10;49(4):237-247.
doi: 10.5051/jpis.2019.49.4.237. eCollection 2019 Aug.

Computed tomographic analysis of maxillary sinus anatomy relevant to sinus lift procedures in edentulous ridges in Taiwanese patients

Shun-Jen Yu  1 , Yi-Hao Lee  2 , Ching-Ping Lin  1 , Aaron Yu-Jen Wu  3
Affiliations

Computed tomographic analysis of maxillary sinus anatomy relevant to sinus lift procedures in edentulous ridges in Taiwanese patients

Shun-Jen Yu et al. J Periodontal Implant Sci. .

Abstract

Purpose: To analyze the maxillary sinus anatomy over edentulous ridges in the bilateral posterior maxillary area in Taiwanese patients using cone-beam computed tomography (CBCT).

Methods: In total, 101 anatomical sites from 61 patients, including 32 premolar and 69 molar regions, were analyzed using CBCT. Measurements were made of the width and height of edentulous ridges, the thickness of the lateral wall of the maxillary sinus, and the presence of a sinus septum and the posterior superior alveolar artery (PSAA). A statistical analysis of the measurements was performed, and correlations among the measurements were assessed.

Results: The average ridge width was 10.26±3.16 mm, with a significantly greater ridge width in the second molar region than in the premolar region. The mean residual ridge height was 8.55±4.09 mm, and ridge height showed an opposite trend from ridge width for the premolar and molar regions. A sinus septum was present at 5.9% of the sites, and the PSAA was observed in 24.5%. The average thickness of the lateral wall of the maxillary sinus was 2.08±0.94 mm, with no significant difference between the tooth position and lateral wall thickness.

Conclusions: This study presents the anatomical features of the maxillary sinus, which should be considered in sinus lift procedures for implant placement, in the Taiwanese population. The use of CBCT is recommended to avoid intraoperative complications.

Keywords: Asians; Cone-beam computed tomography; Edentulous jaw; Maxillary sinus; Sinus floor augmentation.

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Conflict of interest statement

Conflict of Interest: No potential conflict of interest relevant to this article was reported.

Figures

Figure 1
Figure 1
Images were studied in different views. Slices were first oriented at the midcrest of the edentulous area.
Figure 2
Figure 2
In areas missing multiple teeth, the residual ridge height was measured from the crest of the alveolar ridge to the sinus floor at the planned site of the dental implant. The measurement point was 5 mm away from the neighboring tooth and 8 mm away from the first point of the next implant site.
Figure 3
Figure 3
A horizontal line was drawn at the reference point, which was 2-mm coronal to the edentulous crest and was used to measure ridge width.
Figure 4
Figure 4
A perpendicular line was drawn from the horizontal plane, and measurements were taken at 3- and 10-mm coronal to the sinus floor to measure the thickness of the lateral wall.
See this image and copyright information in PMC

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