title: Erratum.
abstract: In the article "Effect of Addition of Platelet-rich Plasma to Calcium Phosphosilicate Putty on Healing at 9 Months in Periodontal Intrabony Defects" by Sagrika Shukla, Ashi Chug, Lanka Mahesh, Harpreet Singh Grover, issue 17 volume 3, page 230. It erroneously appeared that: "...support was given to Dr. George A. Kotsakis DDS, Advanced Education Program in Periodontology, University of Minnesota and Dr. Bhanu K. Bhakri MD (Paediatrics), All India Institute of Medical Sciences for kind support and guidance." The correct statement is: "Acknowledgements: We thank Dr. George A. Kotsakis DDS, Advanced Education Program in Periodontology, University of Minnesota and Dr. Bhanu K. Bhakri MD (Paediatrics), All India Institute of Medical Sciences for kind support and guidance."