Related Experiment Video
Updated: Apr 6, 2026
05:30
Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
Published on: January 10, 2025
1.2K
Surface Roughness of Composite Resins after Simulated Toothbrushing with Different Dentifrices
Bruna Monteiro1, Ana Maria Spohr2
1Master Student, Department of Restorative Dentistry, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Brazil.
Journal of International Oral Health : JIOH
|August 1, 2015
Summary
Simulated toothbrushing increases composite resin surface roughness, with longer brushing times causing greater roughness. The Oral-B Pro-Health Whitening dentifrice resulted in the highest surface roughness for both tested composite resins.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Surface Science
Background:
- Dental composite resins are widely used restorative materials.
- Surface properties of composites are crucial for longevity and aesthetics.
- Wear resistance against toothbrushing is a key performance indicator.
Purpose of the Study:
- To evaluate the in vitro surface roughness of two composite resins (Z350XT and Empress Direct) after simulated toothbrushing.
- To compare the effects of three different dentifrices on composite resin surface roughness.
- To assess the impact of varying toothbrushing durations on surface roughness.
Main Methods:
- Thirty-six samples each of Z350XT and Empress Direct composite resins were prepared.
- Samples were divided into groups and subjected to simulated toothbrushing with three dentifrices: Oral-B Pro-Health Whitening (OBW), Colgate Sensitive Pro-Relief (CS), and Colgate Total Clean Mint 12 (CT12).
- Toothbrushing was performed for 5,000, 10,000, and 20,000 cycles, with surface roughness measured using a roughness tester after each period.
Main Results:
- Both dentifrice type (P=0.044) and brushing time (P=0.000) significantly affected surface roughness.
- Composite resin type (P=0.381) and the interaction between factors were not statistically significant.
- Surface roughness increased with brushing time, with significantly higher roughness observed after 20,000 cycles compared to baseline and 5,000 cycles. The OBW dentifrice group exhibited the highest mean surface roughness (0.390 µm), followed by CS (0.300 µm) and CT12 (0.269 µm).
Conclusions:
- Z350 XT and Empress Direct composite resins exhibit comparable surface roughness after simulated toothbrushing.
- Increased brushing time directly correlates with increased surface roughness of composite resins.
- The OBW dentifrice demonstrated a greater potential to increase surface roughness on both composite resin types compared to the other tested dentifrices.
