Abstract
Bioactive glasses improve dentin adhesion and conversion of experimental adhesives
Dental materials, Vol.34(Supplement 1), pp.e94-e95
2018
DOI: 10.1016/j.dental.2018.08.199
Abstract
Purpose/aim: The objective was to investigate dentin adhesion, interfacial nanoleakage and in situ degree of conversion of adhesives containing bioactive glasses 45S5 (with calcium) or strontium substituted 45S5 (Sr-45S5).
Materials and methods: Commercial two-step etch-and-rinse adhesive Ambar Universal (FGM) was used with bioglass addition (Control) or with 10 wt% 45S5 or 10 wt% Sr-45S5. Extracted third molars were cut to expose a flat dentin surface and were bonded with one of the three adhesives. Bonded teeth were cut into resin-dentin sticks for microtensile bond strength test (n = 6), which was realized after 24 h water storage. Further sticks (n = 3) were surveyed by Micro-Raman spectroscopy to assess in situ degree of conversion by the ratios of 1608/1638 cm−1 peaks and by scanning electron microscopy to observe silver nanoleakage along the interface. The results were analyzed with one-way ANOVA and Tukey's test (p < 0.05).
Results: The bond strength of control adhesive (23.3 ± 1.8 MPa) was significantly lower than 45S5 (33.0 ± 4.8 MPa) and Sr-45S5 (34.3 ± 4.9 MPa) (p = 0.008 and p = 0.003 respectively). The degree of conversion was statistically higher (p = 0.006) for Sr-45S5-containing adhesive (83.4 ± 5.6%) in comparison with control (67.7 ± 6.5%), and 45S5 (76.0 ± 2.9%) attained intermediate outcomes without significant difference from control and Sr-45S5. Nanoleakage was among all adhesives.
Conclusions: The addition of bioactive glass 45S5 with calcium or fully substituted by strontium may enhance dentin bonding, but with polymerization improvement only with Sr-45S5. Nevertheless, further studies with long-term analysis are necessary to further elucidate the potential therapeutic effects of such innovative adhesives.
Details
- Title: Subtitle
- Bioactive glasses improve dentin adhesion and conversion of experimental adhesives
- Creators
- T.O. Rifane - Paulo Picanço School of DentistryL.K. Solheiro - Paulo Picanço School of DentistryK.E. Moura - Paulo Picanço School of DentistryF. Silvestre - Paulo Picanço School of DentistryM.M. Moreira - Paulo Picanço School of DentistryM.T. Souza - Universidade Federal de São CarlosE.D. Zanotto - Universidade Federal de São CarlosS. Sauro - Universidad Cardenal Herrera CEUV.P. Feitosa - Paulo Picanço School of Dentistry
- Resource Type
- Abstract
- Publication Details
- Dental materials, Vol.34(Supplement 1), pp.e94-e95
- Publisher
- Elsevier Inc
- DOI
- 10.1016/j.dental.2018.08.199
- ISSN
- 0109-5641
- eISSN
- 1879-0097
- Language
- English
- Date published
- 2018
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984656549102771
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