PURPOSE: An in vitro investigation analyzing the sagittal and coronal orientation of the occlusal plane using five different facebow transfer systems. MATERIALS AND METHODS: A phantom head containing a maxillary typodont (the control) was oriented so that Frankfort Horizontal Plane (FHP) corresponds with the horizon. The angle between the occlusal plane of the maxillary arch of the phantom head and the FHP was measured along the sagittal and coronal planes using a digital protractor. Fifteen Facebow records using each of 5 facebow transfer systems (the test groups) were made on the phantom head containing the maxillary typodont. Diagnostic casts of the maxillary typodont were fabricated and mounted onto each of the respective semi-adjustable arcon articulators using the facebow records. The same angles measured on the control were measured on the test groups. These angles were compared with the same angle measured on the maxillary arch of the phantom head (the control). The measurements were made by two operators. Intra-operator and inter-operator reliability testing was completed. The data was collected and evaluated for statistically significant differences: 1. Within the groups 2. Between the groups versus the control and 3. Between the groups.
RESULTS: Significant differences in the sagittal and coronal orientation of the occlusal plane were observed between the mounted casts obtained using the five different facebow transfer systems. The Denar system had the least significant difference in the coronal orientation of its occlusal plane versus that of the control. The Hanau and Panadent systems had the least significant difference in the sagittal orientation of their occlusal planes versus that of the control. Inter-group comparison of the test groups showed significant differences between the groups. The Kois system showed the greatest difference in the coronal plane orientation while the Denar system showed the greatest difference in the sagittal plane orientation. CONCLUSIONS: Significant differences in the sagittal and coronal orientation of the occlusal plane were observed with the five facebow transfer systems versus the control. Inter-group comparisons revealed significant differences in the sagittal and coronal orientation of the occlusal plane. Further research is needed to evaluate the clinical implications of these results.
School of Dentistry
Kattadiyil, Mathew T.
Goodacre, Charles J.
Master of Science (MS)
Year Degree Awarded
Date (Title Page)
Library of Congress/MESH Subject Headings
Dental Occlusion; Dental Articulators; Face - Anatomy & Histology; Mandibular Condyle - Physiology; Jaw Relation Record; Dental Models
Subject - Local
Facebow Transfer Systems; Frankfort Horizontal Plane; Maxillary Typodont; Sagittal and Coronal Orientation
Loma Linda University Libraries
This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.
Maveli, Thomas C., "Comparison of Occlusal Plane Orientation Obtained Using Five Facebow Systems" (2014). Loma Linda University Electronic Theses, Dissertations & Projects. Paper 249.
Loma Linda University Electronic Theses and Dissertations
Loma Linda University. Del E. Webb Memorial Library. University Archives