1Faculty of Dentistry, University of Babylon, Hillah city, Iraq
To overcome the deficiencies, at least geometric shortcoming, associated with the most commonly available sagittal indicators (ANB, Wits), efforts were employed to develope another an accurate and valuable mean for sagittal skeletal prediction. The study aimed to establish the mean values of a new sagittal approach [MF-GF”] for the assessment of skeletal relationship in its different patterns and whether or not there is a correlation with the other cephalometric indexes used in the study. The total study sample consist of ninety seven pretreatment lateral cephalometric radiograph of Iraqi subjects with a mean age (13.5± 2). Again it has been subdivided into three skeletal relations (I, II, III) according to the combined criteria of (ANB angle, W angle, Wits appraisal) for each relevant class. MF-GF” is a linear distance measured between two lines perpendicular on the Frankfurt line from point M and G of the maxilla and mandible, respectively. Their mean values were (6.83 ± 0.69; 10.29 ± 1.63; 1.52 ± 1.60) for class I; II; III, respectively. A statistical significant mean difference was determined among all the classes. No significant gender differences were detected. A high degree of association was found to be with ANB angle (r= 0.82, P value<0.001) followed by the wits appraisal. It was concluded that the new MF-GF” distance can accurately be utilized in clinical assessment of sagittal jaw relationship in conjunction with other well known methods of sagittal jaw indicators for orthodontic diagnosis and treatment planning. Further studies are required to assess the reliability and reproducibility of MF-GF” linear for different skeletal patterns using larger sample and different age groups.
Sagittal jaw relation, MF-GF
