Abstract
Objective: This study investigated the effect of endogenous erosion on the microhardness of dentine and a nanofilled composite resin. Procedures for preventing erosion were also studied. Materials and Methods: 90 bovine dentine specimens were divided into three groups in accordance with the method for preventing: negative control, topical application of fluoride and resin-modified glass ionomer varnish. 120 composite resin specimens were distributed into four groups, which also included a resin sealant, among the preventive procedures. Specimens were then randomly divided into three sub-groups according to the exposure to simulate gastric acid solution and subsequent remineralization: negative control, 9 and 18 cycles. Surface analysis was carried out by measuring the Knoop hardness. The data obtained were statistically analyzed using 2-way ANOVA and Tukey test. Result: The mean hardness of dentine and of the composite specimens resin exhibited lower hardness after 18 cycles. However, the resin-modified glass ionomer varnish resulted in greater values compared to the other preventive procedures. Conclusion: A resin-modified glass ionomer varnish seems to be a promising method for minimizing the damage caused by endogenous acid, but its protection can be reduced depending on the intensity of the erosive challenge.
| Translated title of the contribution | Can surface protection prevent the loss of hardness on dentin and composite resin surfaces exposed to erosive challenges? |
|---|---|
| Original language | Spanish |
| Pages (from-to) | 142-149 |
| Number of pages | 8 |
| Journal | Journal of Oral Research |
| Volume | 9 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 30 Apr 2020 |
Keywords
- Composite resins
- Dentin
- Glass ionomer cements
- Hardness
- Hydrochloric acid
- Tooth erosion