What is a Class 4 filling?

Class IV: Cavity on proximal surfaces of incisors or canines that involve the incisal angle (Class IV lesion is the larger version of Class III that covers the incisal angle) Class V: Cavity on the cervical third of the facial or lingual surfaces of any tooth (Think of the neck of the tooth)

What is class 3 cavity preparation?

Class III beveled conventional tooth preparations are prepared as conventional preparations with the addition of a cavosurface bevel or flare of the enamel rather than a butt joint margin.

What are the objectives of composite cavity preparation?

Conventional CLASS II – COMPOSITE CAVITY PREPARATION Modified design 45. OBJECTIVES • Remove the fault, defect, caries or old material • Remove friable tooth structure • 90 degree or greater cavosurface angles • Two components: -occlusal step portion (like class I) -proximal box portion CLASS II – COMPOSITE CAVITY PREPARATION

How are Class IV cavities restored with resin composite?

Class IV cavities are restored with resin composite. In the case of accidental fracture, cavity preparation is typically limited to providing a wide 2 mm all-around bevel of enamel cavo-surface margin. This provides sufficient retention for the restoration through bonding. Extensive Class IV restorations involve all five tooth surfaces.

When to use contraindications in composite cavity preparation?

Contraindications 1. Operating site cannot be appropriately isolated 2. When heavy occlusal stresses are present 3. When all occlusal contacts are on composite only 4. In restorations that extend to the root surface CLASS I COMPOSITE PREPARATION

What is used to prepare a Class IV tooth?

The beveled conventional Class IV tooth preparation was used. Tooth conditioner 36% is used to etch the enamel surface of the prepared teeth. It was left undisturbed for 15-30 secs then washed w/ water. The etched surface were then dried w/ cotton pellet.