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Clinical anatomy of the posterior maxilla pertaining to Le Fort I osteotomy in Thais
Author(s) -
Apinhasmit W.,
Chompoopong S.,
Methathrathip D.,
Sangvichien S.,
Karuwanarint S.
Publication year - 2005
Publication title -
clinical anatomy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 71
eISSN - 1098-2353
pISSN - 0897-3806
DOI - 10.1002/ca.20131
Subject(s) - medicine , maxilla , osteotome , anatomy , osteotomy , thais , hard palate , orthodontics , dentistry , demography , sociology
Abstract This article studies the anatomy of the posterior maxilla pertaining to bone‐cut design of Le Fort I osteotomy to avoid the injury to the descending palatine artery in Thais. Fifty‐five skulls (38 males, 17 females) were assessed for the anatomical landmarks by a combination of direct inspection, computerized imaging, and computed tomography scan analysis. The results showed that 27.28% of the pterygomaxillary junction (PMJ) became synostosis. The mean heights of the PMJ, posterior maxilla, and maxillary tuberosity were 15.14 ± 2.46 mm, 22.51 ± 3.50 mm, and 7.45 ± 2.76 mm, respectively. The mean length of the medial sinus wall measuring from the piriform rim to the descending palatine canal at the Le Fort I level was 34.40 ± 2.96 mm. The mean widths of the posterior incision of Le Fort I osteotomy at the maxillary tuberosity and PMJ were 20.38 ± 2.82 mm and 11.60 ± 1.57 mm. The mean length of the posterior maxilla was 27.18 ± 2.49 mm. Distances from the greater palatine foramen to the maxillary tuberosity incision and PMJ incision were 1.76 ± 1.12 mm and 3.59 ± 1.40 mm. The mean angle between the descending palatine canal and the hard palate was 57.33 ± 4.54°. There were no significant differences in any measurements between sides and genders, except the pterygoid process width and posterior maxilla length of males were longer than those of females ( P < 0.05). This study could provide better understanding of the posterior maxillary anatomy that is important for the bone‐cut design of Le Fort I osteotomy to avoid excessive intraoperative and postoperative hemorrhage including ischemia of the mobilized maxilla. Clin. Anat. 18:323–329, 2005. © 2005 Wiley‐Liss, Inc.