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Conservative Dentistry - 3 Questions
For a class V gold restoration, the mesial and distal cavity margins should end at the line angles of the tooth to ensure proper adaptation and prevent overhangs. This is important for both functional and aesthetic reasons
Acid etching is a dental procedure that creates a micromechanical bond between the tooth surface and a restorative material. This bonding process significantly reduces microleakage, which is the microscopic space between the tooth and the restoration where bacteria and fluids can penetrate.
The final polish of a cast gold alloy to achieve a smooth polished surface is done by 1) Pickling: This is a process used to remove oxides and impurities from the surface of a metal before applying a final finish. However, it does not provide the final polish. 2) Electropolishing: This technique uses an electrical current to dissolve the metal surface and create a smooth finish, but it is not commonly used for gold alloy restorations. 3) Sandblasting: This method involves propelling an abrasive material against the metal surface to smooth and clean it, but it is too aggressive for the final polish of a gold alloy restoration. 4) Rouge: Rouge is a fine abrasive paste used with a polishing wheel or point to achieve the final polish on a cast gold alloy restoration. It removes minor imperfections and gives a high luster to the metal. The correct answer is 4) Rouge, as it is the standard technique for achieving a smooth, polished surface on cast gold alloys.
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