I Alshahrani1, M Ajmal2, T Alam2, M Luqman2, M A Kamran1, H Al Mohiy3. 1. Department of Paediatric Dentistry and Orthodontic Sciences, King Khalid University College of Dentistry, Abha, Saudi Arabia. 2. Department of Diagnostic Sciences, King Khalid University College of Dentistry, Abha, Saudi Arabia. 3. Department of Radiologic Sciences, King Khalid University College of Dentistry, Abha, Saudi Arabia.