Introduction - The aim of the study is to identify the ideal position of maxillary central incisor as defined by soft tissue thickness of the upper lip, using modified A-line. Materials and methods-30 standardized lateral cephalograms of adult orthodontically treated patients were studied. Patients with esthetically pleasing profile, competent lips, average growth pattern, ANB range in 2-4º and Angle’s class I molar relationship were selected. Cephalometric landmarks were located and U1 position with respect to modified A line, A-Pog line, N-Pog line and SN plane was studied. Results-The mean value of U1 to modified A- line is -0.5mm. The observed mean values for U1 to A-Pog, U1 to N-Pog and U1 to SN plane are 5.98mm, 6.98mm and 103.78º respectively. Conclusion-The modified A- line, based on horizontal plane (HP) and soft tissue thickness of the upper lip at point A can be used as an objective cephalometric tool for positioning maxillary central incisor.
IJCR is following an instant policy on rejection those received papers with plagiarism rate of more than 20%. So, All of authors and contributors must check their papers before submission to making assurance of following our anti-plagiarism policies.
