Restorative Technique – Class III Composite
Step-by-step Class III Restoration
This PDF download by Dr. Buddy Mopper provides the pictorial steps involved in a Class III restoration from preparation to final polish. In this case, there is a carious lesion on the proximal surfaces of the canine.
Preparing the tooth for a Class III Restoration
The first set of steps involves the preparation of the tooth, including etching and bonding. Begin by preparing the tooth using a 330 Carbide bur. Next clean the interproximal contact with Cosmedent’s FlexiDiamond Strip. You then clean the interproximal contact with Cosmedent’s FlexiDiamond Strip. After cleaning, create a uniform 2mm long bevel with the 6862-012 diamond bur. Then apply Cosmedent’s EnamelEtch well past the long bevel using the #1 Brush. In final preparation step, apply the bonding adhesive, Cosmedent Complete.
The steps walk you through the placement of the substructure of the tooth with either a Microhybrid or Nanofill composite. This dentin replacement, in this case, Renamel Microhybrid A3, is used as a base for its strength. It will also increase value and opaque the darkened area of the tooth. Using the Cosmedent 8AL instrument, sculpt the Renamel Microhybrid to the leading edge of the long bevel. Polymerize the Microhybrid.
The Renamel Microfill layer is added next to simulate the enamel surface of the tooth structure. Take a small amount of Microfill in your fingers and roll it into a convenience form. This makes it easy to place on the tooth. Place the Renamel Microfill layer using Cosmedent’s 8AL instrument. Polymerize this final layer for 60 seconds.
Finishing and Polishing the Composite Restoration
The final steps finish and polish the restoration. Add initial contour to the restoration with an ET9 carbide bur. When contouring, move the bur from composite to tooth. Next, using a series of aluminum oxide discs, you will continue to refine and then polish the Class III restoration. Cosmedent offers the FlexiDisc System (Mini Center) with four different girts — Coarse, Medium, Fine and Superfine. After using the ET9 bur, you will use the Coarse FlexiDisc to blend the Microfill margin into the tooth. You will then follow up with the 3/8″ Medium FlexiDics to finish at the cervical. Additionally, contour the restoration starting from the proximal to create perfect embrasures with the 5/8″ Medium FlexiDisc. To start the initial polish, use the 5/8″ Fine FlexiDisc.
Before the final polish, retract gingival tissue and reduce excess flash with the 8392-016 bur. Using the 8A instrument to torque between the two teeth, gently separate the teeth with the FlexiDimond Strip. Run a Fine/Superfine FlexiStrip in the interproximal.
To finish the composite restoration, add a dab of Enamelize Polishing Paste and polish with a FlexiBuff disc.