What is a Class II cavity?
Class II. These cavities occur on the surfaces between the molars and premolars and are not visible to the human eye.
In which teeth are Class II restorations found?
Therefore, the interproximal surfaces are not classified as Class I) Class II: Cavity on proximal surfaces of premolars and molars (Class II corresponds to surfaces of a posterior tooth you cannot see clinically)
What is a Class 2 patient?
Class 2 is represented by a patient who is seriously injured but quite stabilized by intensive care such as massive vascular loading.
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.
Why are amalgam preparations larger than composite 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.)
Where to place the Bur in amalgam preparation?
Place the bur in the most mesial portion of the preparation outline, orient the bur 5ยบ mesially, and brush upward to create occlusal divergence at the proximal wall of the dovetail Place the bur within occlusal preparation outline, adjacent to enamel shell and parallel to long axis of tooth
Can a rating system be used for cavity preparations?
Preliminary data on the agreement of rating of evaluators indicated that the classification system can be used with good consistency for assessment of variations in cavity preparations.