Cephalometric Floating Norms for Czech Adults

Abstract

Key words: Lateral cephalograms -Cephalometric norms -Hasund harmony schemaAbstract: The purpose of this study was to establish floating cephalometric norms for the description of the individual skeletal pattern in Czech adults. Floating norms provide a method of analysis that uses the variability of the associations among suitable cephalometric measures, on the basis of the regression model combining both sagittal and vertical skeletal parameters. Harmony box is a simple and useful tool for diagnostics of orthodontic anomalies according to individual cephalometric norms. 118 subjects, 53 male and 65 female, from Czech population were selected. The method of multiple regression analysis was used to determine interdependence among five cephalometric variables of the sample. Linear regression equations with corresponding r 2 and standard error of the estimate (SE) were then illustrated as the harmony box. The results construct a harmony box based on correlated cephalometric variables. The multiple regression analysis of the data is graphically illustrated as a harmony schema which divides harmony box in three zones according to the type of the face -prognathic, orthognathic and retrognathic. The cephalometric floating norms describing the individual craniofacial pattern among Czech adults were established based on five correlated variables in the form of a harmony box.

Harmony concept of craniofacial morphology among young Serbian population on Kosovo and Metohia

“…Generally, the smaller the cranial angle, the more prognathic and converse the face is 17 . The above-mentioned results are confirmed in our and other studies 10,25 . If the five variables follow one of the harmonious combinations, the patient's face is considered harmonious and orthognathic.…”

“…The comparison of our results with those from the stud-ies by Sevilla-Naranjilla and Rudzki-Janson 10 and Řeháček et al 25 is shown in Figure 8, and variables' mean values of Filipino and Czech populations are drawn in our harmonious box and harmonious schema. For abbreviations, see under Table 1.…”

“…In addition, comparing our results with those from the studies by Sevilla-Naranjilla and Rudzki-Janson 10 and Řeháček et al 25 , the mean value of the variables among Filipinos and Czechs are drawn in our harmonious box and schema. It is concluded that similarities between Filipinos and our participants do not exist because the variables' sagittal values of Filipinos are located outside the harmonious schema.…”

“…In 2009, Sevilla-Naranjilla and Rudzki-Janson 10 defined and presented floating norms for the population of the Philippines. In 2012, Řeháček et al 25 defined floating norms for the Czech population.…”

Floating norms for individualising the ANB angle and the WITS appraisal in orthodontic cephalometric analysis based on guiding variables

“…In this study, the data pool reflects a contemporary Central European population compared to previous investigations of Panagiotidis and Witt [17] and Järvinen [13]. In the past, several authors found (minor) differences in cephalometric values or craniofacial patterns in terms of population [5,6,18,22,25]. In addition, since the original regression formula for the individualised Wits appraisal of Järvinen [13] considered subjects with all Angle classes, we could increase its precision and validity by taking into account only subjects with class I occlusion.…”