Amalgam Restoration Techniques

<p>The interfacial bond between the new and existing amalgam. (D)</p> Signup and view all the answers

<p>50% (B)</p> Signup and view all the answers

<p>To adapt amalgam to the cavity walls and increase the restoration's density. (D)</p> Signup and view all the answers

<p>Shiny and separates in a single mass from the capsule. (C)</p> Signup and view all the answers

<p>Spherical amalgams require less condensation force, while lathe-cut amalgams need more. (B)</p> Signup and view all the answers

<p>It produces a wet, soft mix that is difficult to remove and sets quickly. (B)</p> Signup and view all the answers

<p>2 to 5 kg (D)</p> Signup and view all the answers

<p>To prevent contamination and ensure optimal properties of the restoration. (D)</p> Signup and view all the answers

<p>To mix the liquid mercury with the dry amalgam alloy powder to form a plastic mass. (A)</p> Signup and view all the answers

<p>They generally have a shorter working time and demonstrate a faster set than admixtures. (C)</p> Signup and view all the answers

<p>Heavy forces tend to push spherical particles to the side, potentially punching through the amalgam mass. (A)</p> Signup and view all the answers

<p>Vertically and horizontally (laterally toward walls of the preparation). (A)</p> Signup and view all the answers

<p>Mechanical condensation requires less energy, reducing dentist fatigue. (D)</p> Signup and view all the answers

<p>To further shape the amalgam occlusally and adapt the amalgam to the cavo surface anatomy. (B)</p> Signup and view all the answers

<p>Parallel to the amalgam margin, positioning burnisher on the unprepared enamel. (D)</p> Signup and view all the answers

<p>To simulate the anatomy of the tooth. (A)</p> Signup and view all the answers

<p>90 degrees (C)</p> Signup and view all the answers

<p>To further decrease the size and number of voids, express excess Hg on the surface of the amalgam restoration and adapt amalgam to the cavo surface. (C)</p> Signup and view all the answers

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The technique for placing amalgam is similar across different preparations, involving mixing, carrying, and condensing.

The process of mixing liquid mercury with dry amalgam alloy powder to form a plastic mix.

Includes hand trituration and mechanical trituration using electric amalgam mixers.

Properly triturated amalgam appears shiny and separates as a single mass from the capsule.

The process of compressing amalgam into the cavity preparation until it is filled and overfilled.

To adapt amalgam to cavity walls, remove excess mercury, and increase restoration density.

Hand condensation and mechanical condensation are two methods of compacting amalgam.

Adequate force for condensation should be 2 to 5 kg for effective amalgam placement.

Primary reasons include secondary caries, marginal defect, and cusp fracture.

Repairing restorations conserves tissue, reduces iatrogenic damage, minimizes anesthesia use, enhances experience, and saves time.

Quality of repair relates to interfacial bond; old amalgam surface must be roughened to remove contaminants.

A fresh amalgam condensed on roughened old amalgam can achieve up to 50% of the original strength.

Sometimes, it's simplest to replace only the damaged portion of a restoration to minimize overall impact.

Condensation of amalgam performed using an automatic device requiring less energy than hand methods.

Shaping the amalgam occlusally with a burnishing instrument before carving.

The process of shaping amalgam to mimic tooth anatomy without removing excess material.

To reduce voids, express excess mercury, and adapt the amalgam to cavity surfaces.

Checking the fitting of the restoration against occlusal surfaces after carving.

A tool used to mark contact points between teeth and restorations during occlusion checks.

The edge where the amalgam meets the tooth structure, ideally forming a 90-degree angle.