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Varying the Polishing Protocol Influences the Color Stability and Surface Roughness of Bulk-Fill Resin-Based
Filipa Freitas1, Teresa Pinheiro de Melo1, António Hs Delgado1,2
1Clinical Research Unit (CRU), Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Universitário Egas Moniz (IUEM), 2829-511 Almada, Portugal.
Journal of Functional Biomaterials
|December 30, 2020
Summary
Dental composite surface properties affect aesthetics and health. Filtek™ Bulk Fill showed the best results with low roughness and color change after polishing, unlike Fill-Up™.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Restorative Dentistry
Background:
- Surface properties like roughness and color are crucial for dental composites, influencing periodontal health and aesthetics.
- The introduction of novel bulk-fill composites necessitates research into their surface characteristics.
- Various finishing and polishing techniques exist, requiring evaluation for their impact on composite surfaces.
Purpose of the Study:
- To investigate the effect of different polishing procedures on the surface roughness and color stability of bulk-fill and incremental-fill dental composites.
- To compare the performance of Filtek™ Bulk Fill and Fill-Up™ (bulk-fill) with Filtek™ Z250 (incremental-fill) composites.
- To determine the correlation between surface roughness and color change in dental composites.
Main Methods:
- Sixty composite discs (Filtek™ Bulk Fill, Fill-Up™, Filtek™ Z250) were prepared and divided into groups based on polishing procedures (three multi-step or bur finishing).
- Surface roughness (Ra) was measured using Atomic Force Microscopy (AFM).
- Color stability was assessed using a spectrophotometer after coffee solution exposure. Data were analyzed using two-way MANOVA.
Main Results:
- Both composite type and polishing procedure significantly affected surface roughness and color change (p < 0.001).
- Fill-Up™ exhibited the highest surface roughness and greatest color change.
- Filtek™ Bulk Fill demonstrated the lowest surface roughness and color change following a three-step polishing procedure.
Conclusions:
- Surface roughness and color change are material and polishing-procedure dependent.
- A significant positive correlation exists between surface roughness and color change (ρ = 0.754, p < 0.001).
- Filtek™ Bulk Fill, when subjected to a three-step polishing procedure, offers superior surface properties regarding roughness and color stability.
