AF-BF is a linear cephalometric measure of the anteroposterior jaw relationship in the sagittal plane. A retrospective, longitudinal study was made to determine the mean Caucasian American AF-BF values at ages 8 and 18 years for 30 male and 32 female participants of the Bolton Growth Study. Mean AF-BF values (± s.d.) for males were 7.3 ± 2.7 mm at 8 years and 6.5 ± 4.2 mm at 18 years. Mean AF-BF values (± s.d.) for females were 6.7 ± 2.1 mm at 8 years and 5.2 ± 2.9 mm at 18 years. No significant difference was found between the mean AF-BF values for males and females at either age group (P < 0.05). The decrease in AF-BF mean values with increasing age both for males and females was statistically significant. The correlation (r) for the AF-BF values was 0.49 (P < 0.05) for females and 0.86 (P < 0.05) for males. With increasing age, the mean difference between ANB values for females was 1.40 ± 1.60 and 1.10 ± 1.40 for males. The correlation of ANB angle and AF-BF provides a clinically useful tool for the cephalometric assessment of anteroposterior sagittal discrepancies of maxillary and mandibular denture bases.
This represents part of the work performed by the first author for the MS degree in Oral Biology, University of Louisville.
David L. Judy, United States Army Activity Center
Allan G. Farman, School of Dentistry, The University of Louisville, Louisville, Kentucky
Anibal M. Silveira, School of Dentistry, The University of Louisville, Louisville, Kentucky
John M. Yancey, School of Dentistry, The University of Louisville, Louisville, Kentucky
Fred J. Regennitter, United States Army Activity Center
William C. Scarfe, School of Dentistry, The University of Louisville, Louisville, Kentucky