title: Evaluation of the accuracy, precision and validity of hydrophilic vinyl polysiloxane impression material for bite mark analysis.
abstract: The present study was undertaken to assess the accuracy, precision and validity of hydrophilic Vinyl Poly Siloxane [VPS] impression material for bite mark documentation and analysis. Medium body VPS impressions of maxillary and mandibular anterior teeth among thirty subjects were taken and dental stone casts prepared. Hollow volume overlays were made and metric analysis was done using advanced imaging software like Adobe Photoshop - 9 and Image J. These values were compared to the measurements taken from bite mark impressions of the same 30 individuals on wax wafers using light body VPS material. The mean differences in the parameters measured by the different techniques were compared using Intra Class Correlation Coefficients [ICCC]. Additionally validity parameters such as sensitivity, specificity, positive and negative predictive value were computed.
authors.affiliation: Department of Oral Medicine, Diagnosis and Radiology, M S Ramaiah Dental College & Hospital.
authors.forename: Sujatha S
authors.initials: SS
authors.lastname: Reddy
authors.affiliation: Department of Oral Medicine, Diagnosis and Radiology, M S Ramaiah Dental College & Hospital.
authors.forename: N
authors.initials: N
authors.lastname: Rakesh
authors.affiliation: Department of Oral Medicine, Diagnosis and Radiology, M S Ramaiah Dental College & Hospital.
authors.forename: Atul
authors.initials: A
authors.lastname: Kaushik
authors.affiliation: Department of Oral Medicine, Diagnosis and Radiology, M S Ramaiah Dental College & Hospital.
authors.forename: D
authors.initials: D
authors.lastname: Devaraju
authors.affiliation: Department of Community Medicine, M S Ramaiah Medical College, MSRIT Post, New BEL Road, Bangalore-560054, Karnataka (India).
authors.forename: B S Nanda
authors.initials: BS
authors.lastname: Kumar
keywords: Vinyl Poly Siloxane impression material; bite marks; forensic odontology; forensic science; hollow volume overlays; metric analysis