[1] Saraswati Med Coll, Dept Dent, Unnao 209859, Uttar Pradesh, India
[2] Inst Dent, Rajendra Inst Med Sci, Dept Publ Hlth Dent, Ranchi 834009, Bihar, India
[3] Saraswati Dent Coll, Dept Oral Med & Radiol, Lucknow 227105, Uttar Pradesh, India
[4] Reg Inst Med Sci, Coll Dent, Dept Prosthodont & Crown & Bridge, Imphal 795004, Manipur, India
[5] Chitwan Med Coll, Dept Oral Med & Radiol, Bharatpur 44207, India