| Autor: |
MONACO, CARLO, Rosentritt, Martin, LLUKACEJ, ALTIN, BALDISSARA, PAOLO, SCOTTI, ROBERTO |
| Přispěvatelé: |
Monaco, Carlo, Rosentritt, Martin, Llukacej, Altin, Baldissara, Paolo, Scotti, Roberto |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
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| Popis: |
This study evaluated marginal adaptation before and after thermomechanical (TCML) loading, gap width and fracture strength of all-ceramic single crowns, as compared to porcelain-fused-to-metal (PFM). Thirty extracted premolars were prepared with a round shoulder of 1.0 mm depth. Specimens were restored with zirconia-ceramic (Group 1), lithium disilicate (Group 2) and metal-ceramic single crowns (Group 3). The replica of each sample was observed with a scanning electron microscope (SEM) to evaluate the crown-cement (c-c) and tooth-cement interface (t-c). After TCML, perfect margins decreased to 91.3% (c-c) and 93.9% (t-c) in Group 1, 94.6% (c-c) and 96.0% (t-c) in Group 2 and 73.5% (c-c) and 53.1% (t-c) in Group 3. The mean fracture strengths were 654.8 ± 98.1 N for Group 1, 551.3 ± 127 N for Group 2 and 501.43 ± 110.1 N for Group 3. All-ceramic systems could substitute for metal-ceramic crowns, but chipping of veneering ceramics, especially in zirconia-based crowns, should be investigated. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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