What is overhang amalgam?

An amalgam overhang is defined as an extension of. amalgam restoration beyond the confines of a cavity. preparation.

What is overhang restoration?

Abstract. Overhanging dental restorations (ODR) are a major dental health problem. An ODR is defined as an extension of restorative material beyond the confines of a cavity preparation. They have been strongly implicated as an etiologic factor in the progression of periodontal disease and are alarmingly prevalent.

What happens if a tooth is restored and it has an overhanging restoration?

Overhanging restorations may increase plaque accumulation and cause gingival inflammation, periodontal tissue damage, and also particularly decrease in alveolar bone height. 17, 21, 22 Also, overhanging restorations are one of the reasons for secondary caries that can cause infection in the pulp.

How do you remove amalgam overhang?

Some methods for removing proximal amalgam overhangs are the EVA reciprocating motor driven system, roto-pro, flame-shaped steel bur, diamond bur and sonic scaler.

When do you polish amalgam?

The finishing and polishing procedures should not be initiated on an amalgam restoration until the amalgam has reached its final set, at least 24 hours after it has been placed and carved. Premature finishing and polishing will interfere with the crystalline structure of the hardening amalgam.

What is crown overhang?

An overhang is a situation where there is a ledge at this margin. This ledge will catch floss and can also catch food and accumulate plaque. And it will also be irritating to the gums and can contribute to gum disease.

What is contour crown?

Over-contoured crowns will cause inflammation around the tooth, gum disease, decay, and quick crown failure. The crown might look like a hat sitting on a hat rack, rather than a natural, secure fit.

What is a Class 3 prep?

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.

How to test overhang Class II amalgam restoration?

Methods: 22 volunteer subjects (age range: 22-42 years old) with 22 overhang Class II amalgam restorations were selected. GCF samples were obtained from adjacent and contralateral teeth for IL-6, IL-8 and TNF-α measurements and analyzed using enzyme-linked immunosorbent assay (ELISA) kits.

What do you need to know about overhang removal?

Overhang removal (i.e., margination) is a procedure which requires training in itself. This polishing technique includes only those margination procedures which can be accomplished using the armamentarium listed in the module. As such, only minute amounts of excess amalgam from any margin of the restoration will be removed.

What happens to GCF levels after overhang restoration?

Purpose: To evaluate clinical periodontal findings and GCF levels of tumor necrosis factor alpha (TNF-α), interleukin 6 (IL-6) and interleukin 8 (IL-8) in patients with overhang amalgam restorations before and after overhang restoration removal.

What should I know about polishing an amalgam restoration?

An amalgam restoration that will contribute to the ling-term dental health of a patient requires proper finishing and polishing procedures. Finishing amalgam restorations involves removing marginal irregularities, defining anatomical contours, and smoothing the surface roughness of the restoration.