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Head and Neck
Published in Rui Diogo, Drew M. Noden, Christopher M. Smith, Julia Molnar, Julia C. Boughner, Claudia Barrocas, Joana Bruno, Understanding Human Anatomy and Pathology, 2018
Rui Diogo, Drew M. Noden, Christopher M. Smith, Julia Molnar, Julia C. Boughner, Claudia Barrocas, Joana Bruno
Remember that the sphenopalatine artery runs with the nasopalatine nerve from the sphenopalatine foramen to the incisive canal. The sphenopalatine artery branches into the posterior lateral nasal artery and the posterior septal branch (Plate 3.29; described in detail in Section 3.3.2.1). The descending palatine artery is a branch of the maxillary artery that runs through the greater palatine canal before bifurcating into the greater palatine artery and the lesser palatine artery.
A skeletal Class III facial asymmetry case with a canted occlusal plane treated by LeFort I with unilateral horseshoe osteotomy
Published in Orthodontic Waves, 2021
Tomoyo Tanaka, Mitsuhiro Hoshijima, Norie Yoshioka, Hiroshi Kamioka
Horseshoe osteotomy allowed for superior elevated repositioning of the maxilla, especially in the posterior segment, by reducing the risk of damaging the descending palatine artery. In the present case, to correct the cant of the maxilla, a significantly larger amount of impaction was required in the right dentoalveolar segment than on the left side. This was technically difficult to achieve by standard LeFort I osteotomy because trimming of the bone around the descending palatine artery is required to upward movement of posterior maxilla. Horseshoe osteotomy was thought that risk of damaging the descending palatine artery was low because the split line of osteotomy is far from palatine artery. We thought that horseshoe osteotomy was adequate for right side of maxillary repositioning. However, horseshoe osteotomy carries a risk of tooth root damage because the split line of this osteotomy procedure is located near the molar root area [17]. Therefore, we selected unilateral horseshoe LeFort I osteotomy in the present case and impacted only the right side of the maxillary posterior to improve the inclination of the maxilla with a consequent reduction in the risk. The unilateral horseshoe osteotomy technique is regarded as a safe and useful method for improving cases with a significant maxilla cant.