Influence of chloramine-T disinfection on elastomeric impression stability

• Published in: European journal of dentistry 2018-04, Vol.12 (2), p.232-236
• Main Authors: Guiraldo, Ricardo Danil, Berger, Sandrine Bittencourt, Punhagui, Marilia Franco, Moretto, Thais Staut, Lopes, Murilo Baena, Gonini-Júnior, Alcides, Sinhoreti, Mário Alexandre Coelho
• Format: Article
• Language: English
• Subjects: Analysis; Dimethylpolysiloxane; Elastomers; Infection control; Original; Original Article
• ISSN: 1305-7456; 1305-7464
• DOI: 10.4103/ejd.ejd_195_17

ABSTRACT Objective: The aim of this study was to evaluate the stability of elastomer through detail reproduction and its dimensional stability (DS) after disinfection with 0.2% chloramine-T. Materials and Methods: The elastomeric impression dental materials used in this study were polydimethylsiloxane (Oranwash L), polyvinyl siloxane (Express), polysulfide (Permlastic), and polyether (Impregum Soft). The entire press procedure was performed on a matrix in accordance with the ISO 4823. Detail reproduction was analyzed using an optical microscope (Stereozoom Microscope) over the 20-μm line with 25 mm of length at a magnification of ×4. DS was measured using an optical microscope (Scanning Tunneling Microscope) by subtracting the distance between the lines X and X’ over the 20-μm line on the matrix (DM) from the distance between the lines on the impression material (DI) divided by DM and multiplied by 100 establishing the equation: DS = ([DI – DM]/DM) ×100; then, 100% was added to the results of the equation. The detail reproduction values were subsequently subjected to descriptive analysis by percentage (%), and the DS values (%) were submitted to Kolmogorov–Smirnov test, two-way ANOVA (material × disinfectant), and Tukey’s test (α = 0.05). Results: All elastomeric impression materials showed 100% of detail reproduction, regardless of the disinfection procedure. Polysulfide (not disinfected) and polysulfide and polydimethylsiloxane (after disinfection with 0.2% chloramine-T) showed the smaller mean values of DS. Conclusion: According to the stability properties analyzed, chloramine-T can be used for disinfection of elastomer molds.