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Published on: December 20, 2024
Effect of internal microblasting on retention of cemented cast crowns
R P O'Connor1, A Nayyar, R E Kovarik
1Department of Restorative Dentistry, Medical College of Georgia, School of Dentistry, Augusta.
Abstract:
Microblasting of cast mental crowns is considered a standard procedure in most laboratories and an effective alternative to acid pickling. During the process of devesting and finishing, the surfaces of cast restorations are microblasted with an abrasive agent. This investigation measured the retention of type III cast gold crowns after cleansing with pickling solution (group I) or microblasting with 50-micron aluminum oxide (group II) or 50-micron glass beads (group III). Microblasting the internal surface of cast crowns with 50-micron aluminum oxide significantly improved the retention of castings luted with zinc phosphate cement.
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