الفهرس 
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Abstract
This study was planned to determine the relationship between clinical crown heights and different facial heights in Egyptian females. To evaluate the predictive value of clinical crown height assessment in estimating facial height by determining the:
1. Relationship between clinical crown heights and different facial heights.
2. Relationship between clinical crown width/height ratio and different facial heights.
Pretreatment lateral cephalometric x-rays and corresponding study casts of ninety female patients were taken from the Orthodontic Department, Faculty of Dentistry, Alexandria University. The x-rays were divided into three equal groups of 30 each, according to facial height (High angle case, average angle case and low angle case). Afterwards, x-rays were traced on lead acetate paper, and measurements were recorded for both x-rays and casts. Comparisons were made between the three groups using ANOVA test.
The results of this study showed that:
1. There was no significant relation between clinical crown heights of teeth and different facial heights in the three studied groups at significance level of P ≤ 0.05.
2. There was no significant relation between clinical crown width/height ratio of teeth and different facial heights in the three studied groups at significance level of P ≤ 0.05.
Therefore it could be concluded that the crown height could not be used as a predictor for the facial height in Egyptian females.