Advisor(s)
John O Burgess
Committee Member(s)
Jack E Lemons
Nathaniel C Lawson
Lance C Ramp
Amjad Javed
Document Type
Thesis
Date of Award
2015
Abstract
Dual cured resin cements are frequently used to cement all ceramic restorations. The increased thickness and /or opacity of restorations block light transmission. In these situations, where little or no light can be transmitted through the restorations, the polymerization of the cement is in the self-cure mode. Purpose: This study measures the bond strength and mode of failure of dual cure resin cements to enamel and dentin in a self-cure mode using e.max rods. Methods: 160 extracted human molars were ground to mid-coronal dentin (N=80) or superficial enamel (N=80) and finished to 320 grit disks. Four adhesive/cement combinations - Multilink Primer A & B/Multilink Automix (MA, Ivoclar), Panavia V5 Tooth Primer/Panavia V5 Paste (PanV5, Kuraray Noritake Dental), Optibond XTR/NX3 (NX3,Kerr) and Scotchbond Universal/RelyX Ultimate (RXU,3M); were applied to enamel and dentin using a self-etch, self-cure mode. A 1mm x 1mm block of e.max (Ivoclar) was etched with 5% HF (20sec), rinsed, dried, silanated, coated with each cement and seated onto enamel or dentin. 100g of force was applied to the tooth/e.max assembly for 8 minutes. To more closely replicate the oral cavity, the experiment was repeated but specimens were fabricated by applying pressure to the e.max/tooth assembly for 10 minutes in an incubator (37°C). After 24hrs storage (at 37°C), samples were debonded at 1mm/min crosshead speed in a universal testing device. A 2-way ANOVA and Tukey post hoc analysis was performed for each material (α<0.05). Results: Panavia V5 showed significantly higher bond strengths to dentin compared to RelyX Ultimate and NX3 at both room temperature and elevated temperature. RelyX Ultimate and NX3 showed a significant increase in bond strength to dentin at elevated temperature. Bond strengths of resin cements were significantly increased at elevated temperature compared to room temperature. Conclusions: Panavia V5 showed high bond strengths to both enamel and dentin in a self-cure mode. An increase in temperature significantly affects the polymerization of dual cure resin cements in the self-cure mode. Hence this study further emphasizes the importance of performing tests that can closely replicate clinical situations.
ProQuest Publication Number
ISBN
978-1-321-70256-9
Recommended Citation
Radhakrishnan, Rashmi, "Bond Of Dual Cure Resin Cements To Enamel And Dentin In Self Cure Mode" (2015). All ETDs from UAB. 2769.
https://digitalcommons.library.uab.edu/etd-collection/2769
Comments
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