For many years, amalgam was a common choice for restoring posterior teeth.
Today, composite fillings are used much more often. The change is not because amalgam suddenly stopped working. It reflects changes in patient preference, adhesive dentistry, restorative materials and environmental policy.
Composite also fits well with a more conservative restorative approach, but it is technique-sensitive. Good isolation, bonding, shaping, finishing and polishing all matter.
Why Composite Is More Common Today
The biggest advantage is appearance.
Composite can be matched to the surrounding tooth, while amalgam remains metallic.
Composite also bonds to enamel and dentin through an adhesive system. In suitable cases, this can support a more conservative preparation because the cavity does not need to rely as heavily on mechanical retention.
The FDA notes that resin-based composite can allow less removal of healthy tooth structure compared with amalgam placement, although moisture control remains important.
Does Amalgam Still Have a Role?
Yes.
Amalgam still has a long clinical history and can perform well in posterior teeth.
A 2025 systematic review reported longer median survival for amalgam than composite in the included studies, although patient factors such as oral hygiene and bruxism also affected longevity.
Another recent review found that evidence was still insufficient to show clear superiority of one material for complex posterior restorations.
So the material choice should still depend on the tooth, the patient and the clinical situation.
Why Composite Has Become More Familiar in Daily Practice
Modern composite materials are used across a wide range of anterior and posterior cases.
Patients often prefer tooth-coloured restorations, and adhesive techniques are now part of routine restorative dentistry.
Environmental policy has also reduced the role of amalgam in some markets.
This has shifted more attention toward the quality of the final composite restoration, especially contour, margins and surface finish.
A Simple Composite Filling Workflow
Prepare → Restore → Shape → Finish → Polish
1. Prepare the Cavity
After caries removal, the cavity can be refined only where needed.
The MR.BUR 330 Pear Carbide Bur FG can be used for cavity preparation and controlled shaping where its geometry suits the restoration.
The aim should still be conservative. There is no benefit in enlarging a preparation unnecessarily.
2. Place and Cure the Composite
After the adhesive procedure, the composite is placed and cured according to the chosen technique.
Building the anatomy as accurately as possible at this stage can reduce the amount of adjustment needed later.
3. Shape the Restoration
After curing, check the contour and occlusion.
The MR.BUR Egg Finishing Carbide Bur FG 7404 can be used for broader occlusal and curved surfaces where the restoration needs shaping.
This is the stage for correcting excess material and restoring the overall form.
4. Fine Finish with a Flame Bur
Once the main contour is established, the MR.BUR Flame Finishing Carbide Dental Bur FG can be used for finer refinement.
Its narrower profile is useful around curved areas, margins and smaller surfaces where a broader bur may be less suitable.
This is where composite finishing burs become useful for controlled refinement rather than bulk reduction.
5. Polish the Surface
After the shape and margins are correct, polishing can begin.
The MR.BUR Composite Polishing Diamond Polisher 6002 provides a two-step medium and fine polishing sequence for the final composite surface.
At this stage, the goal is no longer to reshape the restoration. It is to smooth the surface and improve the final gloss.
What About Existing Amalgam Fillings?
The decline in amalgam use does not mean every existing amalgam restoration should be replaced.
If an amalgam restoration is intact and clinically acceptable, replacement without a clear reason may remove additional healthy tooth structure.
When replacement is needed because of recurrent caries, fracture or restoration failure, the dentist can reassess the tooth and decide which material is most appropriate.
Final Thoughts
Composite has become more common because it offers a tooth-coloured result, works with adhesive dentistry and fits well with modern restorative techniques.
But the final result still depends on more than the material itself.
A practical MR.BUR workflow can move from the 330 Pear Carbide Bur for preparation, to the 7404 Egg Finishing Carbide Bur for shaping, the Flame Finishing Carbide Bur for refinement, and the Composite Polishing Diamond Polisher 6002 for the final polish.
