Evaluation of the styloid process in a Sri Lankan population using digital panoramic radiographs.

Objective: The objectives of this study were to evaluate the normal radiographic length of the styloid process (SP), prevalence and type of elongation, and angulation of the styloid process in relation to sex and side on digital panoramic radiographs in a Sri Lankan population.

Methods: A total of 100 digital panoramic images selected from the database at the Division of Oral Medicine and Radiology, Faculty of Dental Sciences, University of Peradeniya, Sri Lanka were evaluated for the radiological features of the styloid process. Lengths greater than 30 mm were consider as elongated. Elongated styloid processes were also classified into three types based on Langlais classification (elongated, pseudo articulated; and segmented).

Results: The mean radiological length of the SP on the right and left side was 25.8 mm ± 7.5 mm and 23.2 mm ± 9.0 mm respectively. The prevalence of elongated styloid process in males and female were 34.9% and 24.6%. The maximum length observed on right and left sides were 43.2 mm and 41 mm respectively. However, the differences between the genders and the sides were statistically not significant (P = 0.199). The most frequently observed type of elongation was type I (elongated) according to the Langlais classification.

Conclusion: This study provides valuable knowledge of the anatomical variations of the SP which may help clinicians from various specialties to diagnose the Eagle syndrome.