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Aim: The aim of this study was to determine the validity of different vertical parameters in cephalometry.
Materials And Methods: The cephalograms of 94 patients were used in this study. The inclusion criteria were as follows: skeletal Class I, completion of maximum skeletal growth, and no history of orthodontic therapy. The control group consisted of 34 subjects with very good occlusion (overbite 2-4 mm). The patients were classified with the help of dental casts: Group 1 (n = 31) patients with cover-bite (overbite > 5.5 mm) and Group 2 (n = 29) patients with anterior open bite (overbite < -0.5 mm). In addition to the 24 standard cephalometric measurements (Bergen-Analysis), we included individualized norm values (Segner & Hasund), the Overbite Depth Indicator (ODI) described by Kim, the Denture Frame Analysis (DFA) described by Sato, and facial-type evaluations according to Schopf.
Results: We observed significant differences among the three study groups in all the vertical parameters tested. We demonstrated statistically-significant classification results for the Segner & Hasund harmony box's individualized norm values (83.8%), and those of the ODI (77.7%) and ML-AB angle (76.6%).
Conclusions: Based on the vertical cephalometric parameters, we succeeded in statistically differentiating among the groups with open bite, cover-bite and the control group. Various measurements must be taken to ensure that the cephalometric vertical relationships are reliably evaluated.
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