What are the principles of cavity preparation?

The main principles of cavity preparation are to preserve the underlying tooth structure, protect the pulp tissue, save as much as Enamel or Dentin as possible, shape the cavity to achieve maximum resistance and Retention as possible depending on the type of restoration used to help in bearing the mastication forces.

What are the principles of cavity preparation?

The main principles of cavity preparation are to preserve the underlying tooth structure, protect the pulp tissue, save as much as Enamel or Dentin as possible, shape the cavity to achieve maximum resistance and Retention as possible depending on the type of restoration used to help in bearing the mastication forces.

Which tooth would receive a Class II restoration?

Class II restorations in permanent molars and premolars; 4. Class V restorations in primary and permanent posterior teeth.

What is meant by the term rule of thirds in relation to Class 2 cavity preparation?

The “Rule of Thirds” states that for a 3mm increase at the incisal pin, we obtain a 2mm increase at the incisors and 1mm increase between molars.”

How do you prepare a Class 2 amalgam cavity?

Envision the cavity preparation outline and extent:

  1. Always keep the bur perpendicular to the long axis of the tooth.
  2. Follow the anatomical grooves of the tooth​
  3. ​Leave a small “enamel shell” interproximally to protect the adjacent tooth from iatrogenic damage.

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 does class 2 mean in dentistry?

Class II: Class II is where the lower first molar is posterior (or more towards the back of the mouth) than the upper first molar. In this abnormal relationship, the upper front teeth and jaw project further forward than the lower teeth and jaw.

What is a amalgam restoration?

Amalgam Restoration Amalgam restorations have been used to restore decayed and damaged teeth for over 150 years. Most people refer to amalgam fillings as ‘silver’ fillings because of their color when first place.

Is amalgam a good restorative material?

INTRODUCTION  Amalgam although a brittle material, has been adequately serving as a restorative material since 175 years, understanding of its properties and judgment of the preparation design are the vital factors controlling its use. 2 3. 3 Class II Restorations.

What is a Class II restoration cavity?

3. 3 Class II Restorations. It is defined as a cavity that is present on the proximal surfaces of premolars and molars. ( G.V .BLACK ) DEFINITION

What is the difference between composite and amalgam preparations?

*amalgam preparations are typically larger than comparable composite preparations due to material requirements Clinical note: The final preparation dimensions are determined by the extent of the carious lesion or existing, faulty restoration Obtain proper isolation of the tooth (e.g. rubber dam, isovac/isolite, etc.)

What are the steps in cavity preparation?

STEPS IN CAVITY PREPARATION 1 THE OUTLINE FORM:. Remove of caries. Weak i.e.; less than 0,5mm. 2 RESISTANCE FORM. 3 RETENTION FORM. 4 4.CONVENIENCE FORM. Ideally, a tooth preparation fulfilling all the requirements for outline, resistance, and retention… 5 CARIES REMOVAL. 6 FINISH OF THE CAVITY WALL. 7 CAVITY DEBRIDEMENT. More