Repairing Fractured Composite Restorations
Author Information
Author(s): Fennis Willem M. M., Kreulen Cees M., Tezvergil Arzu, Lassila Lippo V. J., Vallittu Pekka K., Creugers Nico H. J.
Primary Institution: University Medical Centre Utrecht
Hypothesis
The difference in fracture resistance is absent with repaired FRC restorations replacing cusps.
Conclusion
Repaired cusp-replacing FRC restorations show about half the fracture resistance of original restorations.
Supporting Evidence
- Repaired specimens had significantly lower fracture loads than original specimens.
- 89% of specimens in Group (B) showed intact tooth substrate after restoration fracture.
- Fracture loads ranged from 820 N to 1559 N.
Takeaway
When a tooth restoration breaks, fixing it with new material makes it weaker than it was before, especially if it was made with special fibers.
Methodology
Sixteen extracted human premolars with fractured FRC restorations were repaired and tested for fracture resistance.
Potential Biases
Potential bias in specimen selection and handling.
Limitations
The study used extracted teeth, which may not fully represent clinical conditions.
Participant Demographics
Extracted human premolars.
Statistical Information
P-Value
P = 0.02 for Group (A) and P < 0.001 for Group (B)
Confidence Interval
95% CI for mean: Lower bound 1017, Upper bound 1505 for Group (A); Lower bound 920, Upper bound 1335 for Group (B)
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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