Abstract
The aim of this study was to analyse the vertical location of the posterior superior
alveolar artery (PSAA) using a reliable new reference plane regardless of tooth and
alveolar bone, and to measure the diameter in each posterior tooth region, which is
of relevance to lateral sinus floor elevation surgery. A total of 270 sinuses in 139
patients were examined in this study. The A-plane was defined by A-point and the bilateral
jugal points on reconstructed three-dimensional images. The distance from the PSAA
to the defined plane was measured in four regions: first premolar (P1), second premolar
(P2), first molar (M1), and second molar (M2). The average distance of the PSAA above
the plane in the P1, P2, M1, and M2 regions was determined to be 10.24 mm, 7.35 mm, 5.47 mm, and 7.23 mm, respectively. The PSAA was found to run above the plane in 97.4% of sinuses, below
the plane in 1.1%, and on the plane in 1.5%. In conclusion, the new plane is useful
for intraoperative location of the PSAA. According to the study findings, the area
below the reference plane can be considered safe for lateral approach sinus surgery
in terms of preserving the integrity of the PSAA.
Key words
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Article info
Publication history
Published online: April 13, 2021
Accepted:
March 24,
2021
Identification
Copyright
© 2023 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.
