University of Khartoum

Evaluation of Relationship between the Occlusal Plane and Three Different Levels of Ala-Tragus Line in Sample of Dentate Sudanese Populations

Evaluation of Relationship between the Occlusal Plane and Three Different Levels of Ala-Tragus Line in Sample of Dentate Sudanese Populations

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Title: Evaluation of Relationship between the Occlusal Plane and Three Different Levels of Ala-Tragus Line in Sample of Dentate Sudanese Populations
Author: Ahmed, Mayada Ahmed Elobeid
Abstract: Background: Orientation of occlusal plane is one of the most important clinical steps in prosthodontics rehabilitation of edentulous patients. Correct orientation plays a vital role in achieving the perfect occlusal balance and function of complete dentures. Aim: This study aims to evaluate the most reliable posterior reference point of Ala Tragus Line in relation to occlusal plane in a dentate Sudanese population. Methods and material: 150 dentate subjects with ages range from (19-24) years were randomly selected from the dental students of university of Khartoum with healthy and well aligned permanent teeth. Right lateral profile photographs were taken with subjects having fox plane placed intra-orally contacting the occlusal plane. Reference points corresponding to inferior border, middle and superior border of tragus and inferior border of ala of nose were marked on photographs. Those points were joined to get three different levels of Ala-Tragus line, and the angles between them measured using Auto CAD program and the most parallel relationship was determined. Data obtained was subjected to statistical analysis using Independent Sample’s T test, Chi-Square test. Results: Significant difference was found between the means of the three angles (P <0.001). The mean angle formed by the OP and ATLs was (8.0º ± 3.7), and for ATLm was (4.3º ± 3.7) while for ATLi was (0.3º ± 3.9) which revealed the most parallel relationship. Conclusion: The line joining the inferior border of ala of the nose with the inferior border of the tragus of the ear was the most reliable line to determine the occlusal plane orientation in Sudanese population.
URI: http://khartoumspace.uofk.edu/123456789/27447


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