Comparison of the elastic recovery and strain-in-compression of commercial and novel vinyl polysiloxane impression materials incorporating a novel crosslinking agent and a surfactant
Shahab Ud Din,
Osama Khattak,
Farooq Ahmad Chaudhary,
Asfia Saeed,
Azhar Iqbal,
Jamaluddin Syed,
Alaa Ahmed Kensara,
Thani Alsharari,
Mohammed Mustafa,
Sherif Elsayed Sultan,
Mangala Patel
Affiliations
Shahab Ud Din
School of Dentistry (SOD), Shaheed Zulfiqar Ali Bhutto Medical University (SZABMU), Islamabad, Pakistan
Osama Khattak
Department of Restorative Dentistry, Jouf University, Sakaka, Saudi Arabia, Sakaka, Saudi Arabia
Farooq Ahmad Chaudhary
School of Dentistry (SOD), Shaheed Zulfiqar Ali Bhutto Medical University (SZABMU), Islamabad, Pakistan
Asfia Saeed
Shifa College of Dentistry, Shifa Tameer-e-Millat University, Islamabad, Pakistan
Azhar Iqbal
Department of Restorative Dentistry, Jouf University, Sakaka, Saudi Arabia, Sakaka, Saudi Arabia
Jamaluddin Syed
Oral Basic Clinical Sciences Department, Faculty of Dentistry, King AbdulAziz University, Jeddah, Saudi Arabia
Alaa Ahmed Kensara
Department of Oral and Maxillofacial Prosthodontics, King Abdul Aziz University Dental Hospital, Jeddah, Saudi Arabia
Thani Alsharari
Department of Restorative and Dental Science, Faculty of Dentistry, Taif University, Taif, Saudi Arabia
Mohammed Mustafa
Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
Sherif Elsayed Sultan
Department of Fixed Prosthodontics, Tanta University, Tanta, Egypt
Mangala Patel
Centre for Oral Bioengineering (Dental Physical Sciences Unit), Bart’s and The London, School of Medicine and Dentistry, Queen Mary University of London, London, UK
This study aims to formulate experimental vinylpolysiloxane (VPS) impression materials and compare their elastic recovery and strain-in-compressions with three commercial VPS materials (Aquasil, Elite, and Extrude). Five experimental materials (Exp), two hydrophobic (Exp-I and II) and three hydrophilic (Exp-III, IV and V) were developed. Exp 1 contained vinyl-terminated poly-dimethyl siloxane and a conventional cross-linking agent (poly methylhydrosiloxane), while Exp- II contained a novel cross-linking agent that is tetra-functional dimethyl-silyl-ortho-silicate (TFDMSOS). Exp III–V (hydrophilic materials) were formulated by incorporating different concentrations of non-ionic surfactant (Rhodasurf CET-2) into Exp II formulation. Measurement of elastic recovery and strain-in-compression for commercial and experimental materials were performed according to ISO4823 standard using the calibrated mechanical testing machine (Tinius Olsen). One-way analysis of variance (one-way ANOVA) and Tukey’s post-hoc (HSD) test were used for statistical analysis and a p-value of ≤ 0.05 was considered significant. Exp-I has statistically similar values to commercial VPS. The Exp-II showed the highest elastic recovery, while % elastic recovery was reduced with the addition of the non-ionic surfactant (Rhodasurf CET-2). The % reduction was directly related to the concentration of Rhodasurf CET-2. In addition, Exp II had significantly higher strain-in-compression values compared to Exp-I and commercial materials. These values were further increased with the addition of a non-ionic surfactant (Rhodasurf CET-2) was added (Exp-III, IV and V).
