Non-ferrule design for indirect restoration of endodontically treated premolars with severe hard tissue loss
| Autor: | Guido Sterzenbach, Paul Wunderlich, Uwe Blunck, Gabriel Krastl, Kerstin Bitter |
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| Rok vydání: | 2023 |
| DOI: | 10.21203/rs.3.rs-2369821/v1 |
| Popis: | Objectives This study aimed to predict the potential of endocrown and non-retentive crown restoration designs without post-and-core build-up made of either lithium-disilicate (Li) or CAD-CAM composite resin (CR). Materials and Methods After removing the clinical crown sixty endodontically treated human maxillary premolars were restored accordingly to group C = glassfibre-reinforced post and composite core-build-up with ferrule design and crown restoration (control); group NRC = non-retentive crown preparation without endodontic post and no-ferrule design and group EC = endocrown design with internal extension. Prior to linear loading until failure (Fmax) all crown restorations were subjected to thermal cycling and simultaneous mechanical loading (TCML). The maximum load capabilities (Fmax) were compared using Kruskal-Wallis and Mann-Whitney analyses. The marginal gap formation was evaluated before and after TCML. Results All specimens survived the TCML. Specimens of group C/CR (502.5 N) and NRC/CR (481.5 N) revealed significant lower load capabilities (p |
| Databáze: | OpenAIRE |
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