R Frankenberger1, S Nassiri2, S Lücker2, N N Lygidakis3, N Krämer4. 1. Department of Operative Dentistry and Endodontics, Dental School, University of Marburg and University Medical Center Giessen and Marburg, Campus Marburg, Georg-Voigt-Str. 3, 35039, Marburg, Germany. 2. Department of Pediatric Dentistry, Dental School, University of Marburg and University Medical Center Giessen and Marburg, Campus Giessen, Schlangenzahl 14, 35392, Giessen, Germany. 3. Lygidakis Dental Clinic, Athens, Greece. 4. Department of Pediatric Dentistry, Dental School, University of Marburg and University Medical Center Giessen and Marburg, Campus Giessen, Schlangenzahl 14, 35392, Giessen, Germany. Norbert.Kraemer@dentist.md.uni-giessen.de.
Abstract
OBJECTIVE: This in vitro investigation should identify the effect of protective liners on dentine bond strength of a polyacid modified resin composite to dentine of primary teeth. METHODS:Forty-two extracted caries-free primary molars were randomly assigned to seven groups (n = 6) and flattened. Six test groups were centrally covered with different protective liners/base materials: Kerr Life (KL), IRM zinc oxide eugenol cement (IRM), Ketac Bond (KB), Vitrebond (VB), Dycal (DY), and mineral trioxide aggregate (MTA). Specimens were bonded with Prime&Bond NT (PB) and restored with Dyract eXtra. The control group (C) did not receive liner pretreatment. After 24-h storage in Aqua dest. (37 °C), specimens were cut and regional microtensile bond strengths of the uncovered areas were tested. Fractography was conducted under a light microscope and further interface/surface analyses were performed under a SEM. Statistical appraisal was carried out using oneway ANOVA (mod. LSD test; p < 0.05). RESULTS: Independent of the distance to the applied liner, all groups exhibited inferior μ-TBS to dentine of primary teeth compared to the control group (p < 0.05). The results were as follows in MPa(SD) x:significance level/percentage of adhesive fractures: PB: 34 (10)A/72%; KL: 23 (25)B/64%; KB: 15 (12)C/76%; DY 15 (13)C/55%; IRM: 14 (10)C/68%; VB: 12 (10)C/61%; MTA 12 (10)C/69%. CONCLUSIONS: Protective liners significantly reduced μ-TBS to dentine of primary teeth.
RCT Entities:
OBJECTIVE: This in vitro investigation should identify the effect of protective liners on dentine bond strength of a polyacid modified resin composite to dentine of primary teeth. METHODS: Forty-two extracted caries-free primary molars were randomly assigned to seven groups (n = 6) and flattened. Six test groups were centrally covered with different protective liners/base materials: Kerr Life (KL), IRM zinc oxide eugenol cement (IRM), Ketac Bond (KB), Vitrebond (VB), Dycal (DY), and mineral trioxide aggregate (MTA). Specimens were bonded with Prime&Bond NT (PB) and restored with Dyract eXtra. The control group (C) did not receive liner pretreatment. After 24-h storage in Aqua dest. (37 °C), specimens were cut and regional microtensile bond strengths of the uncovered areas were tested. Fractography was conducted under a light microscope and further interface/surface analyses were performed under a SEM. Statistical appraisal was carried out using oneway ANOVA (mod. LSD test; p < 0.05). RESULTS: Independent of the distance to the applied liner, all groups exhibited inferior μ-TBS to dentine of primary teeth compared to the control group (p < 0.05). The results were as follows in MPa(SD) x:significance level/percentage of adhesive fractures: PB: 34 (10)A/72%; KL: 23 (25)B/64%; KB: 15 (12)C/76%; DY 15 (13)C/55%; IRM: 14 (10)C/68%; VB: 12 (10)C/61%; MTA 12 (10)C/69%. CONCLUSIONS: Protective liners significantly reduced μ-TBS to dentine of primary teeth.
Authors: D H Pashley; R M Carvalho; H Sano; M Nakajima; M Yoshiyama; Y Shono; C A Fernandes; F Tay Journal: J Adhes Dent Date: 1999 Impact factor: 2.359
Authors: Luciano Casagrande; Letícia Westphalen Bento; Débora Martini Dalpian; Franklin García-Godoy; Fernando Borba de Araujo Journal: Am J Dent Date: 2010-02 Impact factor: 1.522
Authors: Renata Franzon; Luciano Casagrande; Alice Souza Pinto; Franklin García-Godoy; Marisa Maltz; Fernando Borba de Araujo Journal: Am J Dent Date: 2007-06 Impact factor: 1.522