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

Journal of Periodontal & Implant Science 2019년 49권 4호 p.237 ~ 247
 ( Yu Shun-Jen ) - Chang Gung University College of Medicine Chang Gung Memorial Hospital Department of Periodontics

 ( Lee Yi-Hao ) - Chang Gung University College of Medicine Chang Gung Memorial Hospital Department of Orthodontics
 ( Lin Ching-Ping ) - Chang Gung University College of Medicine Chang Gung Memorial Hospital Department of Periodontics
 ( Wu Aaron Yu-Jen ) - Chang Gung University College of Medicine Chang Gung Memorial Hospital Department of Dentistry
 ( Lee Yi-Hao ) - Chang Gung University College of Medicine Chang Gung Memorial Hospital Department of Orthodontics
 ( Lin Ching-Ping ) - Chang Gung University College of Medicine Chang Gung Memorial Hospital Department of Periodontics
 ( Wu Aaron Yu-Jen ) - Chang Gung University College of Medicine Chang Gung Memorial Hospital Department of Dentistry

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.

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