What is a Class 2 cavity?

Class II cavities Class II carious lesions occur on proximal surfaces of premolars and molars. They may occur in combination with occlusal (Class I) caries or they may occur alone. In situations where the presence of caries is on the occlusal as well as the proximal surface, a two-surface cavity is prepared.

What is a Class II restoration?

A Class II restoration has to recreate not only the natural contour of the tooth, but also the corresponding proximal contact. Many dentists consider this point, in particular, to be the most demanding part of the treatment.

How is cavity preparation done for Class II?

The Class II cavity preparation is done in two stages: 1. Occlusal segment 2. Proximal segment Step 2. Begin occlusal segment Penetrate the bur 90 degrees to the plane of occlusal surface with the bur tilted slightly laterally for ease of penetration. The initial outline form should include only the faulty or defective occlusal pits and fissures.

What are the three classes of cavity restoration?

CLASS I RESTORATIONS All pit-and-fissure restorations are Class I, and they are assigned to three groups, as follows: 1. Restorations on Occlusal Surface of Premolars & Molars 2. Restorations on Occlusal Two Thirds of the Facial & Lingual Surfaces of Molars 3. Restorations on Lingual Surface of Maxillary Incisors.

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 do you need a slot cavity for a carious lesion?

When a Class II carious lesion exists without involvement of the occlusal, a slot cavity is prepared which is essentially the proximal portion of the Class II preparation.