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The polishability of posterior composites.
1Department of Restorative Dentistry, Loma Linda University, School of Dentistry, Calif.
The Journal of Prosthetic Dentistry
|February 1, 1989
Summary
Posterior composite polishability depends on particle size and hardness. Larger particles and higher hardness in dental composites lead to increased surface roughness, impacting restoration aesthetics and longevity.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
Background:
- Dental composites are widely used for tooth restorations.
- Evaluating the polishability of posterior composites is crucial for clinical success.
Purpose of the Study:
- To assess the polishability of six posterior composite brands.
- To compare their polishability with an anterior microfilled composite.
- To correlate particle size, filler loading, and hardness with surface roughness.
Main Methods:
- Stylus profile instrumentation and scanning electron microscopy (SEM) for surface analysis.
- Sedigraphy for inorganic particle size and distribution analysis.
- Assessment of filler loading and hardness values.
Main Results:
- Posterior composites with larger particles exhibited significantly higher surface roughness compared to those with smaller fiber particles.
- A direct positive correlation was observed between hardness values and surface roughness.
- Filler loading and particle characteristics influenced polishability.
Conclusions:
- Particle size and hardness are key determinants of posterior composite polishability.
- Larger particles and increased hardness result in greater surface roughness.
- These findings inform the selection of dental composites for improved surface finish and clinical outcomes.