What are the steps of cavity preparation?

What are the steps of cavity preparation?

Cavity preparation, the procedure used to remove demineralized enamel and infected dentin consists of four steps:

1. Opening a cavity or removing a poorly fitting restoration.
2. Removing infected dentin.
3. Evaluating residual tooth tissue and removing unsupported or structurally compromised enamel.
4. Finishing cavity margins.

What burs are used for Class 1 cavity preparation?

245 burs compared. A No. 245 bur with a head length of 3 mm and a tip diameter of 0.8 mm or a smaller No. 330 bur is recommended to prepare the conservative Class I tooth preparation (Fig.

What should be the depth of cavity preparation in primary teeth?

 The principles in the cavity preparation are the same of the cavity preparation in permanent teeth, although the depth is not carried more than 1.5 mm. 53.  Walls of preparation converge toward buccal surface of tooth for retention of restoration.

What is a Class 1 dental restoration?

1. Class I: Cavity in pits or fissures on the occlusal surfaces of molars and premolars; facial and lingual surfaces of molars; lingual surfaces of maxillary incisors (Class I corresponds to surfaces of a posterior tooth you can clinically see—occlusal/lingual/buccal surfaces.

What is conventional cavity preparation?

The fundamental concepts relating to conventional and modified tooth preparation are the same: (1) all unsupported enamel tooth structure is normally removed; (2) the fault, defect, or caries is removed; (3) the remaining tooth structure is left as strong as possible; (4) the underlying pulpal tissue is protected; and …

What is a cavity preparation?

Definition of Cavity Preparation: The orderly operating procedure required to remove diseased tissue and establish in a tooth the biomechanically acceptable form necessary to receive and retain a restoration.

What is isthmus in cavity preparation?

The transition between the occlusal and proximal cavity is termed isthmus. This is the narrowest place of preparation and it is of fundamental significance for retention of the filling.

What are the classes of cavities?

What Are the Classes of Cavities?

• Class I. This describes tooth decay that occurs on tooth surfaces in which your dentist can see easily.
• Class II. These cavities occur on the surfaces between the molars and premolars and are not visible to the human eye.
• Class III.
• Class IV.
• Class V.
• Class VI.

What is class 2 cavity preparation?

A Class II carious lesion develops apical to the contact area on the proximal surfaces of posterior teeth. The procedure for the removal of the carious lesion is the same as that of a class I. The first step is the development of the ideal cavity preparation.

How are Class II cavities treated in primary teeth?

The first step in the traditional preparation of a class II cavity in a primary tooth involves opening the marginal ridge area. Extreme care must be taken to prevent damage to the adjacent proximal surface.

How do you complete a Class 1 cavity outline?

Complete a class 1 cavity outline. marginal ridge. Extend the no.330 bur into the proximal surfaces. Keep the bur parallel to the long axis of the tooth. Move the bur in a pendulating

What are Class V cavities?

CLASS V CAVITIES The Class V cavities are realized more frequently in buccal surface of the primary canines. The principles in the cavity preparation are the same of the cavity preparation in permanent teeth, although the depth is not carried more than 1.5 mm.

What are the stages of capability preparation for dentistry?

STAGES IN CAVITY PREPARATION INITIAL STAGES 1. OUTLINE FOR AND INITIAL DEPTH 2. PRIMARY RESISTANCE FORM 3. PRIMARY RETENTION FORM 4. CONVENIENCE FORM FINAL STAGES 5. REMOVAL OF ANY INFECTED DENTIN OR OLD RESTORATIONS 6. PULP PROTECTION 7.