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Bond strength of izobuthyl and HEMA immersed resilient liner to denture base
d e n t a l m a t e r i a l s 2 6 S ( 2 0 1 0 ) e1–e84
available at www.sciencedirect.com
journal homepage: www.intl.elsevierhealth.com/journals/dema
Abstracts of the Academy of Dental Materials Annual Meeting, 7–9 October 2010, Trieste, Italy
1 Bond strength of izobuthyl and HEMA immersed resilient liner to denture base
Conclusions: Immersion of silicon based soft denture liner in Izobuthyl for 1 min increased tensile bond strength twice between silicone soft liner and PMMA denture base materials.
H. Akin ∗ , F. Tugut, B. Mutaf, U. Guney, A.K. Ozdemir
doi:10.1016/j.dental.2010.08.009
Cumhuriyet University, Faculty of Dentistry, Sivas, Turkey
2
Objectives: Bonding to the denture base surface is a significant problem for resilient liner, especially for silicone-based ones. The purpose of this study was to investigate the bonding properties of denture base to silicone based soft denture liner when immersed in izobuhyl and 2-hydroxyethyl methacrylate (HEMA) for various times. Materials and methods: Polymethyl methacrylate test specimens were fabricated and then randomly assigned to 5 groups (n = 15), according to the treatments applied, untreated (control, group 1), resilient liner immersed in izobuthyl for 1 min (group 2), resilient liner immersed in izobuthyl for 3 min (group 3), resilient liner immersed in HEMA for 1 min (group 4), and resilient liner immersed in HEMA for 3 min (group 5). The resilient liner specimens were processed between 2 polymethyl methacrylate (PMMA) blocks. Bonding strength of the liners to PMMA was compared by tensile test with the use of universal testing machine at a crosshead speed of 5 mm/min. The mean value and standard deviation of the specimens were statistically evaluated by 1-way ANOVA and post hoc Tukey–Kramer multiple comparisons tests (˛ = 0.05). Results:
The effect of chlorhexidine pre-treatment on the bond strength of fiber posts
Groups
Mean (N)
SD
Group 1 Group 2 Group 3 Group 4 Group 5
25.25a 39.59b 56.85c 27.26a 33.73d
2.09 1.55 2.24 1.67 2.46
n = 15, F = 582.184, and groups with same superscripted letters not significantly different (p > 0.05). There was no statistical difference in tensile bond strength between group 1 and group 4 (p = 0.063).
0109-5641/$ – see front matter
V. Angeloni 1 , G. Marchesi 1 , M. Cadenaro 1 , A. Mazzoni 2 , F.R. Tay 3 , D.H. Pashley 3 , L. Breschi 1 1
University of Trieste, Italy University of Bologna, Italy 3 Medical College of Georgia, GA, USA 2
Objectives: The application of chlorhexidine (CHX) as a therapeutic primer to dentin has been reported to reduce the degradation of the hybrid layer over time. The aim of this study was to evaluate the effect of CHX pre-treatment on bond strength of fiber posts luted to intra-radicular dentin with a self-adhesive cement immediately and after 1-year storage in artificial saliva. The hypothesis tested was that CHX pretreatment does not affect bond strength after aging. Materials and methods: RelyX Fiber-Posts (3M ESPE, St Paul, MN, USA) were luted with a self-adhesive cement (RelyX Unicem, 3M ESPE) into roots of human incisor with or without CHX pre-treatment of the intra-radicular dentin. 2% CHX (Bisco Inc., Schaumburg, IL, USA) was applied for 1 min and carefully air-dried before self-adhesive cement application. Bonded specimens were sectioned in 1 mm-thick slabs and either immediately submitted to push-out bond strength test or stored in artificial saliva at 37 ◦ C for 1 year prior testing. Data were statistically analyzed with Kruskaal–Wallis test (p = 0.05). Results: CHX pre-treatment did not affect push-out bond strength of luted specimens, both immediately and after aging in artificial saliva for 1 year (p > 0.05). Means and standard deviations of push-out bond strength expressed as MPa:
available at www.sciencedirect.com
journal homepage: www.intl.elsevierhealth.com/journals/dema
Abstracts of the Academy of Dental Materials Annual Meeting, 7–9 October 2010, Trieste, Italy
1 Bond strength of izobuthyl and HEMA immersed resilient liner to denture base
Conclusions: Immersion of silicon based soft denture liner in Izobuthyl for 1 min increased tensile bond strength twice between silicone soft liner and PMMA denture base materials.
H. Akin ∗ , F. Tugut, B. Mutaf, U. Guney, A.K. Ozdemir
doi:10.1016/j.dental.2010.08.009
Cumhuriyet University, Faculty of Dentistry, Sivas, Turkey
2
Objectives: Bonding to the denture base surface is a significant problem for resilient liner, especially for silicone-based ones. The purpose of this study was to investigate the bonding properties of denture base to silicone based soft denture liner when immersed in izobuhyl and 2-hydroxyethyl methacrylate (HEMA) for various times. Materials and methods: Polymethyl methacrylate test specimens were fabricated and then randomly assigned to 5 groups (n = 15), according to the treatments applied, untreated (control, group 1), resilient liner immersed in izobuthyl for 1 min (group 2), resilient liner immersed in izobuthyl for 3 min (group 3), resilient liner immersed in HEMA for 1 min (group 4), and resilient liner immersed in HEMA for 3 min (group 5). The resilient liner specimens were processed between 2 polymethyl methacrylate (PMMA) blocks. Bonding strength of the liners to PMMA was compared by tensile test with the use of universal testing machine at a crosshead speed of 5 mm/min. The mean value and standard deviation of the specimens were statistically evaluated by 1-way ANOVA and post hoc Tukey–Kramer multiple comparisons tests (˛ = 0.05). Results:
The effect of chlorhexidine pre-treatment on the bond strength of fiber posts
Groups
Mean (N)
SD
Group 1 Group 2 Group 3 Group 4 Group 5
25.25a 39.59b 56.85c 27.26a 33.73d
2.09 1.55 2.24 1.67 2.46
n = 15, F = 582.184, and groups with same superscripted letters not significantly different (p > 0.05). There was no statistical difference in tensile bond strength between group 1 and group 4 (p = 0.063).
0109-5641/$ – see front matter
V. Angeloni 1 , G. Marchesi 1 , M. Cadenaro 1 , A. Mazzoni 2 , F.R. Tay 3 , D.H. Pashley 3 , L. Breschi 1 1
University of Trieste, Italy University of Bologna, Italy 3 Medical College of Georgia, GA, USA 2
Objectives: The application of chlorhexidine (CHX) as a therapeutic primer to dentin has been reported to reduce the degradation of the hybrid layer over time. The aim of this study was to evaluate the effect of CHX pre-treatment on bond strength of fiber posts luted to intra-radicular dentin with a self-adhesive cement immediately and after 1-year storage in artificial saliva. The hypothesis tested was that CHX pretreatment does not affect bond strength after aging. Materials and methods: RelyX Fiber-Posts (3M ESPE, St Paul, MN, USA) were luted with a self-adhesive cement (RelyX Unicem, 3M ESPE) into roots of human incisor with or without CHX pre-treatment of the intra-radicular dentin. 2% CHX (Bisco Inc., Schaumburg, IL, USA) was applied for 1 min and carefully air-dried before self-adhesive cement application. Bonded specimens were sectioned in 1 mm-thick slabs and either immediately submitted to push-out bond strength test or stored in artificial saliva at 37 ◦ C for 1 year prior testing. Data were statistically analyzed with Kruskaal–Wallis test (p = 0.05). Results: CHX pre-treatment did not affect push-out bond strength of luted specimens, both immediately and after aging in artificial saliva for 1 year (p > 0.05). Means and standard deviations of push-out bond strength expressed as MPa: