One of the things I enjoy about restorative dentistry is that not every interesting case needs to be a full-mouth reconstruction. Sometimes it is simply an opportunity to take a very routine procedure and try to do it exceptionally well.

This patient presented with aging amalgam restorations on teeth #3 and #4. The restorations demonstrated marginal deterioration and very early signs of fractures in the surrounding tooth structure. She was not experiencing significant symptoms, but we had a conversation about whether it made sense to continue monitoring the restorations or replace them before a larger problem developed.

I have practiced since 2009, including 13 years treating a high volume of patients in an FQHC while concurrently practicing in private practice. Anecdotally, one lesson that experience has reinforced for me is that there can be value in addressing a compromised restoration while the problem is still relatively manageable. That certainly does not mean every old amalgam should be replaced. The condition of the restoration, remaining tooth structure, symptoms, caries risk, occlusion, and patient preferences all matter. As with any treatment recommendation, the risks, benefits, alternatives, and option of doing nothing should be discussed first.

In this case, the patient elected replacement with bonded composite restorations.

Isolation and Surface Preparation

The existing amalgam restorations were removed under rubber dam isolation using a high-speed handpiece and diamond burs (3-5 minutes). Rubber dam isolation is an important part of my adhesive workflow because it gives my team and me a clean, controlled environment in which to work.

After removal of the restorations, I air-abraded the preparations with SilJet using a MicroEtcher II (1-2 minutes). I use air abrasion routinely as a surface-cleaning and preparation step before bonding. The enamel margins were then selectively etched with phosphoric acid rather than performing a total-etch procedure on the entire preparation.

There is good evidence behind selective enamel etching when using universal adhesives. Phosphoric-acid pretreatment improves the enamel bonding performance of universal adhesives, while the benefit of phosphoric-acid etching of dentin is more dependent upon the adhesive and clinical situation. For me, selective etching provides a nice combination: aggressively prepare the substrate where enamel bonding benefits from it while allowing the universal adhesive to interact with the dentin according to its intended chemistry.

Clearfil Universal Bond Quick 2 was then applied as the adhesive (1 minute).

Building the Restoration in Layers

Tooth # 4 required recreation of the proximal contact, so a sectional matrix, wooden wedge, and Garrison ring were placed (2-3 minutes). The matrix was burnished and the margins carefully inspected before beginning composite placement. I find it is much easier to spend an extra minute getting the matrix and contact right before placing composite than trying to fix an inadequate contact afterward.

The restorative portion of this case demonstrates one of the reasons I enjoy working with the OMNICHROMA family of flowable materials.

I began with approximately 1 to 1.5 mm of OMNICHROMA Blocker Flow at the deepest portion of the preparation. Old amalgam restorations can leave behind dark or discolored tooth structure that is not necessarily caries but can negatively influence the final appearance of a translucent composite restoration. The Blocker gave me a simple way to control that underlying color.

That layer was independently light-cured.

I then placed approximately 2 to 3 mm of OMNICHROMA Flow BULK to create the majority of the restorative volume. One characteristic I particularly appreciated during this case was how uniformly the material settled. I allowed it time to flow and carefully inspected the material for bubbles or voids before curing, of which there were none.

Finally, approximately 1 to 1.5 mm of conventional OMNICHROMA Flow was placed as the occlusal layer and independently light-cured (3-5 minutes).

Although bulk-fill materials have expanded what we can accomplish efficiently, when I am using light-cured composite I still generally prefer a deliberate layered approach. It gives me an opportunity to inspect each increment, control the restorative volume, minimize voids, and know that each layer has been adequately polymerized.

Anatomy Before the Rubber Dam Comes Off

I also try not to think of posterior composite simply as filling a hole. Before removing the rubber dam, I developed the primary occlusal anatomy using a long-tapered fine diamond bur, first establishing the central anatomy and then blending it toward the remaining tooth structure. A football-shaped bur helped refine the transition between the restoration and the natural contours of the tooth. Carbides and a sequential polishing protocol were then used to refine
and polish the restorations (3-4 minutes).

There is an important caveat here: beautiful anatomy is only useful if the patient's occlusion allows the restorative space to recreate what was once lost.

Many patients have decades of functional wear. You can create a beautiful, unworn textbook cusp under the rubber dam only to remove much of it five minutes later because it does not belong in that patient's existing occlusal scheme. In this case, the patient's natural occlusion fortunately allowed me to preserve much of the anatomy I had created.

After removal of the rubber dam, the contacts, margins, occlusion, and esthetics were evaluated and adjusted as necessary.

The final result is not an exotic procedure, and that is really why I like this case. It demonstrates what can be accomplished during an ordinary restorative appointment by combining good isolation, thoughtful adhesive preparation, deliberate layering, and attention to anatomy.

The patient was happy with the result—and particularly enjoyed seeing the before-and-after photographs on the back of the camera.

For me, those photographs are valuable for another reason. They provide immediate feedback on my own work. Magnified clinical photography has an unforgiving way of showing margins, anatomy, surface texture, and finishing details that are easy to overlook clinically. Routine cases like this become opportunities to evaluate what worked, identify what could be better next time, and continue improving.

That process—doing routine dentistry carefully, documenting it, studying it, and trying to make the next one a little better—is one of the things I still enjoy most about restorative dentistry.