Effect of internal microblasting on retention of cemented cast crowns.
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.
O'Connor
R P
RP
Department of Restorative Dentistry, Medical College of Georgia, School of Dentistry, Augusta.
Nayyar
A
A
Kovarik
R E
RE
D000268:Adhesiveness; D000537:Aluminum Oxide / Q000737:chemistry; D016001:Confidence Intervals; D003442:Crowns; D001840:Dental Bonding; D003775:Dental Polishing; D003781:Denture Retention; D005898:Glass / Q000737:chemistry; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D013499:Surface Properties; D013718:Tensile Strength; D015036:Zinc Phosphate Cement / Q000737:chemistry
D006047:Gold Alloys; D015036:Zinc Phosphate Cement; D000537:Aluminum Oxide