Lohbauer U, Pelka M, Belli R, Schmitt J, Mocker E, Jandt KD, Müller F (2010)
Publication Type: Journal article
Publication year: 2010
Book Volume: 35
Pages Range: 579-586
Journal Issue: 5
DOI: 10.2341/10-012-L
This study evaluated the degree of conversion (Ü) of luting agents around ceramic inlays placed in deep natural cavities. Thirty-six cylindrical Class I cavities (diameter = 4 mm, depth = 4 mm) were prepared in freshly extracted human teeth and randomly divided according to the luting materials used for luting CAD/CAM fabricated inlays (Empress CAD). The dual-cure resin cements Clearfil Esthetic Cement and Variolink II Low and the light-cure composites Grandio Flow and Grandio were luted using the total-etch technique. The self-adhesive dual-cure cements RelyX Unicem and Maxcem Elite were used as recommended by the manufacturer. All of the restorations were photo-activated using a quartz halogen unit (Elipar TriLight; 750 mW/cm2) for 40 seconds. After 24 hour dry-storage in the dark, all the teeth were vertically sectioned into two halves (n=12 per group) using a slow-speed diamond-saw in the bucco-vestibular direction under constant water lubrication to avoid specimen heating. The DC of the luting materials was measured by vibrational spectroscopy using a μ-Raman spectrometer at depths of 1, 3 and 4 mm on each side of the tooth halves (n=24). Disc-shaped samples were produced for measurement of the maximum Ü of each material. Two-way ANOVA and the StudentNewman-Keuls post-hoc test were used in the statistical analysis (α=0.05). All the materials showed no statistical differences in degree of conversion at all tested depths, except for Grandio Flow and Maxcem Elite. Dual-cure and light-cure luting materials showed polymerization homogeneity around ceramic inlays, although dual-cure conventional resin cements tended to show an overall higher conversion.
APA:
Lohbauer, U., Pelka, M., Belli, R., Schmitt, J., Mocker, E., Jandt, K.D., & Müller, F. (2010). Degree of conversion of luting resins around ceramic inlays in natural deep cavities: A micro-raman spectroscopy analysis. Operative Dentistry, 35(5), 579-586. https://doi.org/10.2341/10-012-L
MLA:
Lohbauer, Ulrich, et al. "Degree of conversion of luting resins around ceramic inlays in natural deep cavities: A micro-raman spectroscopy analysis." Operative Dentistry 35.5 (2010): 579-586.
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