Sanjeev Verma1, Deepak Kumar Gupta2, Gurinder Singh3, Shruti Mittal3. 1. Department of Orthodontics, Dr Harvansh Singh Judge institute of Dental Sciences and Hospital, Panjab University, Chandigarh, India. drsanjuverma@yahoo.com. 2. Department of Orthodontics, Dr Harvansh Singh Judge institute of Dental Sciences and Hospital, Panjab University, Chandigarh, India. 3. Department of Orthodontics, Swami Devi Dyal Hospital and Dental College, Barwala, Haryana, India.