Conference paper
Evaluation of Some Lateral Cephalometric Methods for Determination of Occlusal Plane Inclination
Asja Čelebić
; School of Dentistry University of Zagreb, Croatia
Hrvoje Brkić
; School of Dentistry University of Zagreb, Croatia
Zvonimir Kaić
; School of Dentistry University of Zagreb, Croatia
Melita Valentić-Peruzović
; School of Dentistry University of Zagreb, Croatia
Denis Vojvodić
; School of Dentistry University of Zagreb, Croatia
Abstract
The objective o f this study was to test the value o f some lateral cephalometric methods in the determination o f occlusal plane inclination in edentulous patients. Sixty lateral skull radiograms were
taken in male subjects with no history o f orthodontic treatment, with Angle class I occlusion and 28-32 teeth in the jaws. The lengths o f the ANS-HN, ANS-PNS, HN-1P and N-S plane, and the angle between the above mentioned planes and the occlusal plane were measured. Descriptive statistics and correlation analysis were carried out. Results revealed no correlation between the length o f Cook’s plane (ANS-HN) and the angle between Cook’s plane and the occlusal plane (r = -0.0575; p = 0.331); between the length o f the H IP plane and the angle between the HIP and the occlusal plane (r — 0.089; p = 0.249); between the ANSPNS plane and the angle between the ANS-PNS and the occlusal plane (r = - 0.0234; p = 0.036); and between the N -S plane and the angle between the N-S and the occlusal plane ( r = - 0.2343; p = 0.036). The HN-IP plane was not parallel to the occlusal one (x = 8.3 +1-3.56, range 2-17). According to our results, Sloane’s and Cook’s theory and Rich’s theory should be rejected. Also, the length o f the maxillary or the cranial base had no strong correlation with the angle between these planes and the occlusal plane. So, the length o f the ANS-HN, HN-IP, ANS-PNS and N-S could not be used to predict the occlusal plane inclination. Accordingly, other methods rather than these methods evaluated in this study should be used for the occlusal plane determination in edentulous patients.
Keywords
occlusal plane; cephalometrics
Hrčak ID:
99264
URI
Publication date:
15.3.1994.
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