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Recording sagittal condylar angles using a mandibular facebow
Author(s) -
JOHNSON A.,
WINSTANLEY R.B.
Publication year - 1997
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1997.tb00293.x
Subject(s) - sagittal plane , condyle , orthodontics , geology , dentistry , medicine , anatomy
summary The aim of this study was to determine the average sagittal condylar inclination angles of dentate subjects using a mandibular facebow with pencil tracing styli, to relate these angles to values assigned to articulators, and to assess the repeatability accuracy of drawing a tangent to a traced curve. The right and left sagittal condylar inclination angles of 103 subjects were recorded using a mandibular facebow with pencil tracing styli which marked a graph card during protrusive excursions. Tangents to the tracings were measured with a protractor allowing assessment of reproducibility. The mean left and right sagittal condylar inclination angles were 32° and 31.5°, respectively, with no significant differences ( P =0.609). Individual right and left measurements within each group showed significant differences ( P = 0.0000). The mean of the tangents drawn through three sagittal condylar angle tracings by 10 operators was 33.3°, and the mean of 10 tangents drawn through the same three tracings by one of the authors was 32.9°, with no significant difference ( P = 0.634). The average sagittal condylar inclination angles found in this study are in agreement with those reported in the literature. In fixed sagittal condylar angle articulators 30° appear to be an appropriate setting. The reproducibility of this method of recording sagittal condylar inclination angles was found to be accurate for the individual operator and between operators.