Senior Resident - Periodontics, CDER, AIIMS (All India Institute for Medical Sciences), Delhi, India. Professor and Head, Department of Periodontology, Himachal Dental College, Sundernagar, India. Clinical Assistant Professor, Departments of Implant Dentistry and Periodontics, Oral Surgery, New York University College of Dentistry, New York, New York, USA. Principal, Professor and Head, Department of Periodontology, H.S.J. Institute of Medical Sciences, Panjab University, Chandigarh, India. Assistant Professor, Department of Periodontology and Implantology, HP Government Dental College, Shimla, India.