eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2017-03-25 10 1 455 458 10.13005/bpj/1129 13779 article Noufal P. K. 1 Deepa Shenoy 2 Uma K. C. 3 P. Sesha Reddy 4 Acu. Varma 4 Ashish R. Jain 5 Department of Prosthodontics, Al Azhar Dental College, Perumpillichira, Thodupuzha, Kerela, India. Department of Prosthodontics, Sree Anjaneya institute of dental science Modakallur, Atholi post, koilandy, India. Department of Prosthodontics, Asan Memorial Dental College and Hospitals,Chennai, India. Department of Prosthodontics, Goverment Dental College, RIMS, Putlampali, Kadapa, India. Department of Prosthodontics, Saveetha Dental College and Hospitals,Chennai, India. The addition type silicon impression materials, polyvinyl siloxanes have been reported to be most accurate and dimensionally stable. There is much discussion in the accurate fit of cast restoration. Several impression techniques have been advocated for obtaining accuracy of casts using a combination of putty-wash, heavy body, light body and medium body consistency of impression materials.The purpose of this study was to find out the most accurate polyvinyl silxoane putty- reline impression techniques for the fabrication of the most accurate stone dies.In this study, metallic models of two identical Fixed partial Denture abutments were prepared with the size of 12mm, 10mm and 8mm in diameter. The distance between the two abutments was measured using a traveling microscope A total of 40 impression were made. All the impression were poured to obtain the casts, and were evaluated to assess the dimensional stability of four different polyvinyl siloxane putty reline impression techniques.The inter abutment distance was highest in Group I- 2.447 and least was in Group IV- 2.415. Percentage deviation from master model of each impression technique was highest in Group III- 0.77%  and least in Group IV- 0.24% Within the limitations of the study, a) Poly vinyl siloxance putty- reline one step impression technique is the most accurate for the fabrication of stone dies b) Among the two – step  putty reline techniques, two step with polyethylene spacer was accurate technique, as the lining thickness increased the dies made from these impression were least accurate. https://biomedpharmajournal.org/vol10no1/evaluation-of-accuracy-of-polyvinyl-silxoane-putty-reline-impression-techniques-for-the-fabrication-of-dies/ Abutment Dies Dimensional Stability Impressions Putty Reline