Impact of mounting methods in computerized axiography on assessment of condylar inclination^*

* Presented at the 91^st General Session & Exhibition of the International Association of Dental Research in Seattle, Washington, March 2013.

Abstract

Objective: Valid and reliable recording is a key requirement for accurately simulating individual jaw movements.

Methods: Horizontal condylar inclination (HCI) and Bennett’s angle were measured using a digital jaw tracker (Cadiax® Compact 2) in 27 young adults. Three mounting methods (paraocclusal tray adapter, periocclusal tray adapter, and tray adapter with mandibular clamp) were tested.

Results: The mean values of the HCI differed by up to 10° between the mounting methods; however, the values for Bennett’s angle did not differ substantially. While the intersession reliability of the Bennett’s angle assessment did not depend on the mounting method, the reliability of the HCI assessment was only fair to good for the paraocclusal mounting method but poor for both periocclusal mounting methods.

Discussion: For attaching the tracing bow of jaw trackers to the mandible, a paraocclusal tray adapter should be applied, to achieve the most reliable results.

Keywords:

• Pantography
• sagittal and horizontal condylar inclination
• computerized axiography
• jaw tracker
• occlusal clutch
• young adults

Acknowledgments

The authors thank Ingolf Riemer for taking and processing the images. The authors would particularly like to thank Mrs. Annett Schrock for her support with the statistical analyses.

Notes

* Presented at the 91^st General Session & Exhibition of the International Association of Dental Research in Seattle, Washington, March 2013.