Department of Prosthodontics, Islamabad Medical and Dental College, 45400, Pakistan. Department of Oral Biology, Institute of Dentistry, CMH Lahore Medical & Dental College, National University of Medical Sciences, 54810, Pakistan. Department of Prosthodontics, Institute of Dentistry, CMH Lahore Medical & Dental College, National University of Medical Sciences, 54810, Pakistan. Department of Oral Biology, Rashid Latif Medical College, 54600, Pakistan. Department of Orthodontics, Lahore Medical & Dental College, 53400, Pakistan. Preventive Dentistry Department, College of Dentistry, Jouf University, 72721, Saudi Arabia.