title: A comparative study of physical properties of gypsums manufactured in India.
abstract: Gypsum products are one of the most widely used materials in dentistry. The wide use of plaster of paris motivated a number of manufacturers to introduce different brands of the profession but their physical and mechanical properties were still questionable. The aim of this study was to access, compare and evaluate the physical properties of different brands of laboratory gypsum available in Indian dental market. Seven brands namely Calspar, Rajhans, Elephant, Horse, Lion, Johnson and Shree Niwas Chemicals were selected for the comparison of their particle size, consistency and setting time. The obtained data were tabulated and compared with Indian, Australian and US standard specification. Statistical analysis for comparative study was done. It was found that none of the brands were up to mark. The present study shall be able to provide some beneficial information regarding their quality control and guide the manufacturers for improving the standardization of their products so that most suitable type of material may be available to the profession.
authors.affiliation: Department of Prosthodontics and Dental Materials Sciences, Azamgarh Dental College, Azamgarh, UP India.
authors.forename: Rameshwar
authors.initials: R
authors.lastname: Singh
authors.affiliation: Department of Prosthodontics and Dental Material Sciences, F.O.D.S, C.S.M. Medical University, Lucknow, UP India ; Flat No. 502, New Teacher's Apartment, T.G. Hostel, Chowk, Lucknow, UP 226003 India.
authors.forename: Kamleshwar
authors.initials: K
authors.lastname: Singh
authors.affiliation: Department of Prosthodontics and Dental Material Sciences, F.O.D.S, C.S.M. Medical University, Lucknow, UP India.
authors.forename: Kaushal K
authors.initials: KK
authors.lastname: Agrawal
keywords: Consistency; Gypsum; Setting time; Size