Fracture behavior of single-structure fiber-reinforced composite restorations
Objective: The applications of single-structure fiber-reinforced composite (FRC) in restorative dentistry have not been well reported. This study aimed to clarify the static mechanical properties of anterior crown restorations prepared using two types of single-structure FRC. Materials and methods:...
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Medical Journals Sweden
2016-12-01
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| Series: | Acta Biomaterialia Odontologica Scandinavica |
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| Online Access: | http://dx.doi.org/10.1080/23337931.2016.1224670 |
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| author | Kohji Nagata Sufyan K. Garoushi Pekka K. Vallittu Noriyuki Wakabayashi Hidekazu Takahashi Lippo V. J. Lassila |
| author_facet | Kohji Nagata Sufyan K. Garoushi Pekka K. Vallittu Noriyuki Wakabayashi Hidekazu Takahashi Lippo V. J. Lassila |
| author_sort | Kohji Nagata |
| collection | DOAJ |
| description | Objective: The applications of single-structure fiber-reinforced composite (FRC) in restorative dentistry have not been well reported. This study aimed to clarify the static mechanical properties of anterior crown restorations prepared using two types of single-structure FRC. Materials and methods: An experimental crown restoration was designed for an upper anterior incisor. The restorations were made from IPS Empress CAD for CEREC (Emp), IPS e.max® CAD (eMx), experimental single-structure all-FRC (a-FRC), Filtek™ Supreme XTE (XTE), and commercially available single-structure short-FRC (everX Posterior™) (n = 8 for each material) (s-FRC). The a-FRC restorations were prepared from an experimental FRC blank using a computer-aided design and manufacturing (CAD/CAM) device. A fracture test was performed to assess the fracture load, toughness, and failure mode. The fracture loads were vertically applied on the restorations. The surface micromorphology of the FRC restorations was observed by scanning electron microscopy (SEM). The data were analyzed by analysis of variance (p = .05) followed by Tukey's test. Results: s-FRC showed the highest mean fracture load (1145.0 ± 89.6 N) and toughness (26.2 ± 5.8 Ncm) among all the groups tested. With regard to the micromorphology of the prosthetic surface, local crushing of the fiberglass was observed in s-FRC, whereas chopped fiberglass was observed in a-FRC. Conclusions: The restorations made of short-FRC showed a higher load-bearing capacity than those made of the experimental all-FRC blanks for CAD/CAM. The brittle-like fractures were exhibited in the recent dental esthetic materials, while local crushing fractures were shown for single-structure FRC restorations. |
| format | Article |
| id | doaj-art-8d6af2cb4ebf4026b5391607af737075 |
| institution | DOAJ |
| issn | 2333-7931 |
| language | English |
| publishDate | 2016-12-01 |
| publisher | Medical Journals Sweden |
| record_format | Article |
| series | Acta Biomaterialia Odontologica Scandinavica |
| spelling | doaj-art-8d6af2cb4ebf4026b5391607af7370752025-08-20T02:56:39ZengMedical Journals SwedenActa Biomaterialia Odontologica Scandinavica2333-79312016-12-012111812410.1080/23337931.2016.12246701224670Fracture behavior of single-structure fiber-reinforced composite restorationsKohji Nagata0Sufyan K. Garoushi1Pekka K. Vallittu2Noriyuki Wakabayashi3Hidekazu Takahashi4Lippo V. J. Lassila5Institute of Dentistry, University of TurkuInstitute of Dentistry, University of TurkuInstitute of Dentistry, University of TurkuTokyo Medical and Dental UniversityTokyo Medical and Dental UniversityInstitute of Dentistry, University of TurkuObjective: The applications of single-structure fiber-reinforced composite (FRC) in restorative dentistry have not been well reported. This study aimed to clarify the static mechanical properties of anterior crown restorations prepared using two types of single-structure FRC. Materials and methods: An experimental crown restoration was designed for an upper anterior incisor. The restorations were made from IPS Empress CAD for CEREC (Emp), IPS e.max® CAD (eMx), experimental single-structure all-FRC (a-FRC), Filtek™ Supreme XTE (XTE), and commercially available single-structure short-FRC (everX Posterior™) (n = 8 for each material) (s-FRC). The a-FRC restorations were prepared from an experimental FRC blank using a computer-aided design and manufacturing (CAD/CAM) device. A fracture test was performed to assess the fracture load, toughness, and failure mode. The fracture loads were vertically applied on the restorations. The surface micromorphology of the FRC restorations was observed by scanning electron microscopy (SEM). The data were analyzed by analysis of variance (p = .05) followed by Tukey's test. Results: s-FRC showed the highest mean fracture load (1145.0 ± 89.6 N) and toughness (26.2 ± 5.8 Ncm) among all the groups tested. With regard to the micromorphology of the prosthetic surface, local crushing of the fiberglass was observed in s-FRC, whereas chopped fiberglass was observed in a-FRC. Conclusions: The restorations made of short-FRC showed a higher load-bearing capacity than those made of the experimental all-FRC blanks for CAD/CAM. The brittle-like fractures were exhibited in the recent dental esthetic materials, while local crushing fractures were shown for single-structure FRC restorations.http://dx.doi.org/10.1080/23337931.2016.1224670Restorative dentistryfracturesingle-structure fiber-reinforced composite |
| spellingShingle | Kohji Nagata Sufyan K. Garoushi Pekka K. Vallittu Noriyuki Wakabayashi Hidekazu Takahashi Lippo V. J. Lassila Fracture behavior of single-structure fiber-reinforced composite restorations Acta Biomaterialia Odontologica Scandinavica Restorative dentistry fracture single-structure fiber-reinforced composite |
| title | Fracture behavior of single-structure fiber-reinforced composite restorations |
| title_full | Fracture behavior of single-structure fiber-reinforced composite restorations |
| title_fullStr | Fracture behavior of single-structure fiber-reinforced composite restorations |
| title_full_unstemmed | Fracture behavior of single-structure fiber-reinforced composite restorations |
| title_short | Fracture behavior of single-structure fiber-reinforced composite restorations |
| title_sort | fracture behavior of single structure fiber reinforced composite restorations |
| topic | Restorative dentistry fracture single-structure fiber-reinforced composite |
| url | http://dx.doi.org/10.1080/23337931.2016.1224670 |
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