| Autor: |
L. V. Martens, Edward C. Combe, D. J. Schneider |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
Journal of Oral Rehabilitation. 31:85-89 |
| ISSN: |
0305-182X |
| DOI: |
10.1046/j.0305-182x.2003.01205.x |
| Popis: |
summary There is current concern about bacterial contamination of dental unit waterlines. This research hypothesized that the presence of increasing concentrations of bacteria in water used to wash etched enamel would result in a corresponding decrease in both shear bond strength (SBS) and critical surface tension (γC) of enamel. A further hypothesis was made that there is a correlation between SBS and γC. The effect of 3ḃ5 ppm iodine in the water as a bacteriostatic agent was also assessed. Five groups of 10 samples of bovine enamel were etched, washed, and a resin composite bonded to them. The control group was washed with distilled water. Another group was washed with the dilute iodine solution. The remaining three groups used a different concentration of Escherichia coli DH5α as follows (in cfu mL−1): group 1: 102; group 2: 104; group 3: 106. Shear bond strength data were measured on an Instron testing machine at a crosshead speed of 1 mm min−1. Adhesion data were (MPa): control: 24ḃ6 ± 6ḃ0; with iodine: 20ḃ8 ± 2ḃ7; group 1: 19ḃ8 ± 2ḃ7; group 2: 13ḃ5 ± 3ḃ0; group 3: 13ḃ9 ± 3ḃ6. The F-test yielded a highly significant difference between control group, iodine group and group 1, compared with groups 2 and 3 (P |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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