Refereed journal article or data article (A1)
Influence of short-fiber composite base on fracture behavior of direct and indirect restorations
List of Authors: Garoushi S, Sungur S, Boz Y, Ozkan P, Vallittu P K, Uctasli S, Lassila L
Publisher: SPRINGER HEIDELBERG
Publication year: 2021
Journal: Clinical Oral Investigations
Volume number: 25
Start page: 4543
End page: 4552
Number of pages: 10
ISSN: 1432-6981
eISSN: 1436-3771
DOI: http://dx.doi.org/10.1007/s00784-020-03768-6
URL: https://link.springer.com/article/10.1007/s00784-020-03768-6
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/50991770
Objectives: The aim was to examine the influence of short-fiber composite (SFC) core on the fracture-behavior of different types of indirect posterior restorations. In addition, the effect of thickness ratio of SFC-core to the thickness of the veneering conventional composite (PFC) on fracture-behavior of bi-structured composite restorations was evaluated.
Materials and methods: MOD cavities with removed palatal cusps were prepared on 90 intact molars. Five groups of direct overlay restorations (n = 10/group) were fabricated having a SFC-core (everX Flow) with various thicknesses (0, 1, 2, 3, 4 mm) and layer of surface PFC (G-aenial Anterior), remaining the thickness of the bi-structure restoration to be 5 mm. Four groups of CAD/CAM-made restorations (Cerasmart 270 and e-max CAD) were fabricated either with 2-mm layer of SFC-core or without fiber reinforcement. Intact teeth (n = 10) were used as control group. Restorations were statically loaded until fracture. Fracture patterns were evaluated visually. Data were analyzed using ANOVA (p = 0.05).
Results: With indirect overlay restorations, no statistically significant differences (p > 0.05) were observed in the load-bearing capacities between restorations reinforced by 2-mm SFC-core (bi-structured) and those fabricated from plain restorative materials. ANOVA displayed that direct overlay restorations made from 4-mm layer thickness of SFC-core had significantly higher load-bearing capacities (3050 ± 574 N) (p < 0.05) among all the groups tested.
Conclusions: Restorations (direct/indirect) combining SFC-core and a surface layer of conventional material demonstrated encouraging achievement in reference to fracture behavior.
Clinical relevance: The use of flowable short-fiber composite as reinforcing base with large direct and indirect restorations may result in more repairable failure.
Downloadable publication This is an electronic reprint of the original article. |