KACD
Search
- Page Path
- HOME > Search
Research Articles
- The effect of saliva decontamination procedures on dentin bond strength after universal adhesive curing
- Jayang Kim, Sungok Hong, Yoorina Choi, Sujung Park
- Restor Dent Endod 2015;40(4):299-305. Published online October 2, 2015
- DOI: https://doi.org/10.5395/rde.2015.40.4.299
-
Abstract
PDF
PubReader
ePub Objectives The purpose of this study was to investigate the effectiveness of multiple decontamination procedures for salivary contamination after curing of a universal adhesive on dentin bond strength according to its etch modes.
Materials and Methods Forty-two extracted bovine incisors were trimmed by exposing the labial dentin surfaces and embedded in cylindrical molds. A universal adhesive (All-Bond Universal, Bisco) was used. The teeth were randomly divided into groups according to etch mode and decontamination procedure. The adhesive was applied according to the manufacturer's instructions for a given etch mode. With the exception of the control groups, the cured adhesive was contaminated with saliva for 20 sec. In the self-etch group, the teeth were divided into three groups: control, decontamination with rinsing and drying, and decontamination with rinsing, drying, and adhesive. In the etch-and-rinse group, the teeth were divided into four groups: control, decontamination with rinsing and drying, decontamination with rinsing, drying, and adhesive, and decontamination with rinsing, drying, re-etching, and reapplication of adhesive. A composite resin (Filtek Z350XT, 3M ESPE) was used for filling and was cured on the treated surfaces. Shear bond strength was measured, and failure modes were evaluated. The data were subjected to one-way analysis of variation and Tukey's HSD test.
Results The etch-and-rinse subgroup that was decontaminated by rinse, drying, re-etching, and reapplication of adhesive showed a significantly higher bond strength.
Conclusions When salivary contamination occurs after curing of the universal adhesive, additional etching improves the bond strength to dentin.
- 18 View
- 0 Download
- Evaluation of the effect of blood contamination on the compressive strength of MTA modified with hydration accelerators
- Kaveh Oloomi, Eshaghali Saberi, Hadi Mokhtari, Hamid Reza Mokhtari Zonouzi, Ali Nosrat, Mohammad Hossein Nekoofar, Paul Michael Howell Dummer
- Restor Dent Endod 2013;38(3):128-133. Published online August 23, 2013
- DOI: https://doi.org/10.5395/rde.2013.38.3.128
-
Abstract
PDFPubReaderePub
Objectives This study was performed to evaluate the effect of blood contamination on the compressive strength (CS) of Root MTA (RMTA) modified with Calcium chloride (CaCl2) and Disodium hydrogen phosphate (Na2HPO4) as setting accelerators over time.
Materials and Methods A total of 110 cylindrical specimens of RMTA were divided into 6 experimental groups as follows: Group1, RMTA; Group 2, RMTA modified with CaCl2 (RMTA-C); Group 3, RMTA modified with Na2HPO4 (RMTA-N); Group 4, RMTA contaminated with blood; Group 5, RMTA-C contaminated with blood; Group 6, RMTA-N contaminated with blood. The CS of specimens in all groups was evaluated after 3 hr, 24 hr, and 1 wk. In the modified groups (groups 2, 3, 5, and 6) the CS of five specimens per group was also evaluated after 1 hr.
Results Blood contamination significantly reduced the CS of all materials at all time intervals (
p < 0.05). After 3 hr, the CS of specimens in the RMTA groups (with and without blood contamination) was significantly lower than those in the RMTA-C and RMTA-N groups (p < 0.05). The CS values were not significantly different at the other time intervals. In all groups, the CS of specimens significantly increased over time (p < 0.05).Conclusions Blood contamination decreased the CS of both original and accelerated RMTA.
- 20 View
- 0 Download
Original Article
- Effect of salivary contamination of teeth on microtensile bond strength of various dentin bonding systems
- Kyoung-Kyu Choi, Gil-Joo Ryu
- J Korean Acad Conserv Dent 2003;28(3):203-208. Published online May 31, 2003
- DOI: https://doi.org/10.5395/JKACD.2003.28.3.203
-
Abstract
PDFPubReaderePub
The purpose of this study was to evaluate the effect of salivary contamination of teeth on bonding efficacy of self-priming and self-etching DBSs. The materials used were Single Bond(SB, self-priming system, 3M), Unifil Bond(UB, self-etching system, GC), and Scotchbond Multi-Purpose Plus(SM, 3M) as control. Forty five human molars randomly allocated to three groups as dentin bonding systems tested and embedded in epoxy resin. Then the specimens were wet-ground to expose flat buccal enamel surface or flat occlusal dentin surface and cut bucco-lingually to form two halves with slow speed diamond saw. One of them was used under non-contamination, other under contamination with saliva. The bonding procedure was according to the manufacturer's directions and resin composite(Z-100, 3M Dental Products, St. Paul, MN) was built-up on the bonded surface 5mm high. The specimens were ground carefully at the enamel-composite interface with fine finishing round diamond bur to create an hour-glass shape yielding bonded surface areas of 1.5±0.1mm2. The specimens were bonded to the modified microtensile testing apparatus with cyanoacrylate, attached to the universal testing machine and stressed in tension at a CHS of 1mm/min.. The tensile force at failure was recorded and converted to a tensile stress(MPa). Mean values and standard deviations of the bond strength are listed in table. One-way ANOVA was used to determine significant difference at the 95% level.
The bond strength of SBMP and SB were not affected by salivary contamination, but that of UB was significantly affected by salivary contamination. These results indicate that DBSs with total etch technique seems less likely affected by salivary contamination in bonding procedure.
- 20 View
- 0 Download
First
Prev
