A preliminary study of three-dimensional reconstruction of the human osseous labyrinth from micro-computed tomography scans

Abstract

The adult human temporal bone was investigated using micro-computed tomography scans.

Successful percutaneous cannulation of foramen ovale obstructed by completely ossified pterygoalar ligament using the Hartel approach: Two case reports

“…Such anomalous bony obstructions can interfere with transcutaneous needle placement into the foramen ovale and distort anatomic relationships during approaches to the cranial base. [4,6,7,[10][11][12][13][14][15][16] According to a CT analysis of infratemporal fossa anatomical variants, cannulation of the foramen ovale accompanied by a pterygoalar bar may be impossible using the Hartel approach. [9] A more detailed study suggested that in rare cases, the width of the foramen ovale was approximately 1 mm and that cannulation with the 14-gauge cannula (2.108-mm diameter) used for balloon rhizotomy would be impossible in a subset of these foramina for 2 reasons.…”

“…[4,5] When the pterygoalar ligament forms a large bone bar lateral to the foramen ovale, it can obliterate the lumen of the foramen ovale and block the passage of a needle aimed at the foramen ovale using the Hartel approach. [4][5][6][7] In an examination of dried skulls, Elnashar et al [8] found that all pterygoalar bars causing complete or near-complete obliteration of the lumen would theoretically disturb needle access to the foramen ovale using the Hartel approach and that the presence of pterygoalar ossification could directly influence the choice of the most Both patients provided written informed consent for the publication of their case report.…”