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In vitro fracture resistance and marginal adaptation of metallic and tooth-coloured post systems.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Rosentritt, Martin Sikora, Marcin Behr, Michael Handel, Gerhard |
| Copyright Year | 2004 |
| Abstract | The aim of this in vitro study was to compare the fracture resistance and marginal adaptation of all-ceramic incisor crowns with all-ceramic posts, glass-fibre-reinforced posts and titanium posts as well as a control without any post. Three groups of eight maxillary incisors were restored with an all-ceramic post, a fibre-reinforced composite (FRC) post, a titanium post and a further group was restored without posts. Composite cores were provided and all-ceramic crowns were adhesively luted. After artificial ageing, the fracture resistance of the restored teeth was determined. The marginal adaptation of the restorations at the interfaces between cement-tooth and cement-crown was evaluated with scanning electron microscopy using replica specimen before and after ageing. The restored teeth without posts [270N (235/335)] showed no significantly different fracture strength compared with teeth with the titanium system [340N (310/445)]. The all-ceramic posts [580N (425/820)] and the FRC posts [505N (500/610)] both provided a significant higher fracture resistance than the teeth without posts. Prior to ageing, all materials showed <5% separation at the margins cement-tooth or cement-crown ('marginal gap'). After ageing, the interfaces of all systems deteriorated to values between 6 and 14% marginal gap. The greatest marginal gap was found with the titanium system (14%) at the interface cement-crown and with the all-ceramic posts (12%) at the transition between cement-tooth. Regarding fracture resistance and the marginal adaptation, the all-ceramic and FRC posts may be considered as an alternative to the commonly used titanium post restorations. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://dentalnews.com.br/downloads/artigos-cientificos/pinos-RTD/Rosentritt;%20In%20vitro%20fracture%20resistance.pdf |
| PubMed reference number | 15210029v1 |
| Volume Number | 31 |
| Issue Number | 7 |
| Journal | Journal of oral rehabilitation |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Acclimatization Aging CDISC SEND Biospecimens Terminology Composite Resins Dental Cement Material Functional residual capacity measurement Incisor Interface Device Component Maxilla Odontogenic Tissue Prostheses, Dental, Fixed, Crown, Total, Temporary Titanium |
| Content Type | Text |
| Resource Type | Article |
