title: Does immediate dentin sealing influence the polymerization of impression materials?
abstract: OBJECTIVE
  The objective of the following study is to evaluate the interaction between the resin materials used in immediate dentin sealing (IDS) techniques and impression materials with two different techniques to eliminate the oxygen-inhibition layer.
  
  
  METHODS
  The occlusal dentin surface of 35 human molars was exposed. The teeth were used in two Groups: Group 1 - Impression with Express XT; Group 2 - Impression with Impregum. Groups 1 and 2 were divided into 14 subgroups: Groups 1a and 2a - Control groups; 1b and 2b - IDS with Clearfil SE Bond (CSE); 1c and 2c - IDS with CSE + additional polymerization with glycerin jelly; 1d and 2d - IDS with CSE + alcohol; 1e and 2e - IDS with CSE and Protect Liner F (PLF); 1f and 2f - IDS with CSE and PLF + additional polymerization with glycerin jelly; and 1g and 2g - IDS with CSE and PLF + alcohol. Five teeth were used in each experimental group, and the tooth surface was photographed using a digital camera.
  
  
  RESULTS
  Small quantity of unpolymerized impression material remained attached to the CSE or to the PLF in Groups 1b and 1e. Groups 1c and 1d prevented the interaction. Small quantity of polymerized impression material remained attached to the CSE or to the PLF for Groups 2b and 2e. The same interaction was observed for Groups 2c and 2d. For Groups 2c and 2f, no interactions were observed.
  
  
  CONCLUSIONS
  Resin materials interacted with impression materials. The application of glycerin jelly and alcohol prevented the interaction of CSE with Express XT and PLF with Impregum; however, these treatments were not completely effective in preventing the interaction of CSE with Impregum and PLF with Express XT.
authors.affiliation: Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.
authors.forename: Paula Cristine
authors.initials: PC
authors.lastname: Ghiggi
authors.affiliation: Department of Research and Development, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.
authors.forename: Arno Kieling
authors.initials: AK
authors.lastname: Steiger
authors.affiliation: Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.
authors.forename: Maurem Leitão
authors.initials: ML
authors.lastname: Marcondes
authors.affiliation: Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.
authors.forename: Eduardo Gonçalves
authors.initials: EG
authors.lastname: Mota
authors.affiliation: Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.
authors.forename: Luiz Henrique
authors.initials: LH
authors.lastname: Burnett
authors.affiliation: Department of Dental Materials, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.
authors.forename: Ana Maria
authors.initials: AM
authors.lastname: Spohr
keywords: Immediate dentin sealing; impression materials; oxygen-inhibition layer