Acetabular Component Positioning Using Anatomic Landmarks of the Acetabulum

A novel acetabular alignment guide for THR using selective anatomic landmarks on the pelvis.

This paper presents a novel approach for acetabular alignment during the implant of a prosthetic hip joint in a natural pelvis. The alignment instrument uses selective anatomic bony landmarks on the pelvis, which are accessible in surgery, to guide the placement of the acetabular component in the appropriate orientation. A closed form solution, involving both a forward and reverse analysis, is ...

Preoperative fluoroscopic imaging reduces variability of acetabular component positioning.

We evaluated the preoperative errors in the pelvic tilt of 249 hips before total hip arthroplasty using fluoroscopic imaging while the patients were in the lateral decubitus position. The mean absolute value errors of the pelvic tilt were 2.94° (SD, 2.92°), 2.49° (SD, 2.68°), and 5.92° (SD, 5.20°) in the coronal, transverse, and sagittal planes, respectively. Such preoperative errors in the pel...

Anatomic landmarks of the glossopharyngeal nerve: a microsurgical anatomic study.

OBJECTIVE Compared with other lower cranial nerves, the glossopharyngeal nerve (GPhN) is well hidden within the jugular foramen, at the infratemporal fossa, and in the deep layers of the neck. This study aims to disclose the course of the GPhN and point out landmarks to aid in its exposure. METHODS The GPhN was studied in 10 cadaveric heads (20 sides) injected with colored latex for microsurg...

Seamless Pedestrian Positioning and Navigation Using Landmarks

Anatomic Landmarks of the Distal Radioulnar Joint

HYPOTHESIS Using Lister's tubercle and the ulnar styloid as landmarks, accurate localization of the distal radioulnar joint can be achieved without the need for an image-guided approach. METHODS Cadaveric dissection of 16 upper extremities was performed to measure the relationships between the ulnar styloid, Lister's tubercle, and the distal radioulnar joint. In each specimen, the location of...