• Pruet Kiattiwongse D.D.S.
• Sirima Petdachai D.D.S., Ph.D., (Orthodontics), Thai Board Orthodontics
• Wichitsak Cholitgul B.Sc., D.D.S., Diplomate, Thai Board in Oral Diagnostic Science

Objective To investigate the relationship between alveolar bone dimensions and incisor inclination in
skeletal Class III patients.

Materials and methods Selected samples from digital lateral cephalometric radiographs of 73
skeletal Class III patients from Department of Orthodontics, Faculty of Dentistry, Chulalongkorn
University, aged more than 18 years, ANB less than 1°, overjet less than 0 mm. were examined. Hand
on tracing to investigate relationships between the alveolar bone dimensions and incisor inclination that
divided on maxilla and mandible as 3 variables. The Pearson correlation was used for statistical
analysis (p value = 0.05).

Results In skeletal Class III patients, in the upper arch, there was no statistical significance between
upper incisor inclination and Maxillary alveolar and basal height (MxABH) and between upper incisor
inclination and Maxillary anterior depth (MxAD) as well as in the lower arch that there was no
statistical significance between lower incisor inclination and Mandibular alveolar and basal height
(MdABH) and between lower incisor inclination and Mandibular alveolar depth (MdAD) (p value =
0.05).

Conclusion There is no correlation between alveolar bone dimensions and incisor inclination in
skeletal Class III patients.

(CU Dent J. 2014;37:279-88)