title: Surface detail reproduction and dimensional accuracy of stone models: influence of disinfectant solutions and alginate impression materials.
abstract: This study compared the surface detail reproduction and dimensional accuracy of stone models obtained from molds disinfected with 2% sodium hypochlorite, 2% chlorhexidine digluconate or 0.2% peracetic acid to models produced using molds which were not disinfected, with 3 alginate materials (Cavex ColorChange, Hydrogum 5 and Jeltrate Plus). The molds were prepared over matrix containing 20-, 50-, and 75-µm lines, performed under pressure with perforated metal tray. The molds were removed following gelation and either disinfected (using one of the solutions by spraying followed by storage in closed jars for 15 min) or not disinfected. The samples were divided into 12 groups (n=5). Molds were filled with dental gypsum Durone IV and 1 h after the start of the stone mixing the models were separated from the tray. Surface detail reproduction and dimensional accuracy were evaluated using optical microscopy on the 50-µm line with 25 mm in length, in accordance with the ISO 1563 standard. The dimensional accuracy results (%) were subjected to ANOVA. The 50 µm-line was completely reproduced by all alginate impression materials regardless of the disinfection procedure. There was no statistically significant difference in the mean values of dimensional accuracy in combinations between disinfectant procedure and alginate impression material (p=0.2130) or for independent factors. The disinfectant solutions and alginate materials used in this study are no factors of choice regarding the surface detail reproduction and dimensional accuracy of stone models.
authors.affiliation: Department of Restorative Dentistry, Dental School, University North of Parana, Londrina, PR, Brazil. rdguiraldo@gmail.com
authors.forename: Ricardo Danil
authors.initials: RD
authors.lastname: Guiraldo
authors.forename: Thaís Teixeira
authors.initials: TT
authors.lastname: Borsato
authors.forename: Sandrine Bittencourt
authors.initials: SB
authors.lastname: Berger
authors.forename: Murilo Baena
authors.initials: MB
authors.lastname: Lopes
authors.forename: Alcides
authors.initials: A
authors.lastname: Gonini
authors.forename: Mário Alexandre Coelho
authors.initials: MA
authors.lastname: Sinhoreti
mesh_terms: D000464:Alginates / Q000737:chemistry*; D002133:Calcium Sulfate / Q000737:chemistry*; D002710:Chlorhexidine / Q000031:analogs & derivatives / Q000737:chemistry; D003102:Colloids / Q000737:chemistry; D019551:Dental Disinfectants / Q000737:chemistry*; D003760:Dental Impression Materials / Q000737:chemistry*; D003761:Dental Impression Technique / Q000295:instrumentation; D006801:Humans; D008422:Materials Testing; D008853:Microscopy; D003765:Models, Dental; D009930:Organic Chemicals / Q000737:chemistry; D010463:Peracetic Acid / Q000737:chemistry; D011312:Pressure; D012973:Sodium Hypochlorite / Q000737:chemistry; D013499:Surface Properties; D013997:Time Factors
chemical_list: D000464:Alginates; D003102:Colloids; D019551:Dental Disinfectants; D003760:Dental Impression Materials; C098917:Hydrogum; D009930:Organic Chemicals; C050135:cavex; C043594:Jeltrate; D012973:Sodium Hypochlorite; D010463:Peracetic Acid; C010882:chlorhexidine gluconate; D002710:Chlorhexidine; D002133:Calcium Sulfate