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VOLUME 15 , ISSUE 1 ( January-February, 2014 ) > List of Articles

RESEARCH ARTICLE

The Ala-Tragus Line as a Guide for Orientation of the Occlusal Plane in Complete Dentures

Joseph E Makzoumé, Carole Abi-Ghosn, Ronald Younes

Citation Information : Makzoumé JE, Abi-Ghosn C, Younes R. The Ala-Tragus Line as a Guide for Orientation of the Occlusal Plane in Complete Dentures. J Contemp Dent Pract 2014; 15 (1):108-111.

DOI: 10.5005/jp-journals-10024-1497

Published Online: 00-02-2014

Copyright Statement:  Copyright © 2014; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

The use of the ala-tragus line (ATL) to orient the occlusal plane (OP) is controversial because there is a lack of agreement on the exact points of reference for this line. This study determined the relationship between the natural OP and ATL which was established by using the inferior border of the ala of the nose and (1) the superior border of the tragus (ATL1), (2) the tip (ATL2), and (3) the inferior border of the tragus (ATL3).

Materials and methods

Lateral cephalometric radiographs were taken of each subject by a standard method and tracings were obtained on acetate paper to show the OP and the three ala-tragus lines. The relationship between the OP and each of ATL was measured for each subject. Mean and standard deviation values were then calculated for the relationship. Statistical analysis was performed using repeated measure analysis of variance followed by Bonferroni pairwise comparisons and Student's t-test (α = 0.05).

Results

Significant differences were noted between the three mean angles (p = 0.046). The mean angle (3.275 degrees ± 2.54) formed by OP and ATL2 was significantly the smallest (p < 0.05).

Conclusion

The ala-tragus line, extending from the inferior border of the ala of the nose to the tip of the tragus of the ear presented the closest relationship to the natural occlusal plane.

How to cite this article

Abi-Ghosn C, Zogheib C, Younes R, Makzoumé JE. The Ala-Tragus Line as a Guide for Orientation of the Occlusal Plane in Complete Dentures. J Contemp Dent Pract 2014;15(1):108-111.


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