Disadvantages of Composite Resin fillings
- Although composite resins have become stronger and more resistant to wear, it's not clear whether they are strong enough to last as long as amalgam fillings under the pressure of chewing
- The composite may shrink when placed; this can lead to more cavities in the future in areas where the filling is not making good contact with your tooth. The shrinkage is reduced when your dentist places this type of filling in thin layers.
- These fillings take more time to place because they are usually placed in layers. The increased time and labor involved also contribute to the higher cost (compared with amalgam fillings).
- Indirect fillings and inlays take at least two visits to complete. Your dentist takes impressions at the first visit and places the filling or inlay at the second visit.
- In large cavities, composites may not last as long as amalgam fillings.