Retention of gold alloy crowns cemented with traditional and resin cements.
The aim of this study was to measure in vitro retention of cast gold crowns cemented with traditional and resin cements. Forty-eight human molars were prepared on a lathe to produce complete crown preparations with a consistent taper and split into six groups, eight crowns in each group. Crowns were cast in a high-gold alloy and then cemented. After 24 hours, the retention force (N) was recorded and mean values were analyzed by one-way analysis of variance and the Fisher post-hoc least significant difference (PLSD) multiple comparisons test (a = .05). Failure sites were examined under 3100 magnification and recorded. Mean values (SD) for each group in increasing order of retention force were: Harvard Cement: 43 N (27), TempoCem: 59 N (16), PermaCem Dual: 130 N (42), RelyX Luting Cement: 279 N (26), Contax and PermaCem Dual: 286 N (38), and TempoCem with Contax and PermaCem Dual: 340 N (14). The Fisher PLSD interval (P = .05) for comparing cements was 29 N. Zinc-phosphate cement and provisional resin cements had the lowest retention forces. Resin cement with a bonding agent and the hybrid-ionomer cement had similar retention forces. Resin cement with a bonding agent applied after use of a provisional resin cement had a significantly higher retention force than the other cements tested.
Pinzón
Lilliam M
LM
Department of Preventive and Restorative Dental Science, Unversity of California at San Francisco, California 94143-0758, USA. Lilliam.Pinzon@ucsf.edu
Frey
Gary N
GN
Winkler
Mark M
MM
Tate
William H
WH
Burgess
John O
JO
Powers
John M
JM
D002484:Cementation / Q000379:methods*; D003188:Composite Resins / Q000737:chemistry; D003442:Crowns; D003738:Dental Cements / Q000737:chemistry*; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis / Q000295:instrumentation; D005899:Glass Ionomer Cements / Q000737:chemistry; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008963:Molar / Q000473:pathology; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D019231:Tooth Preparation, Prosthodontic; D014867:Water / Q000737:chemistry; D015036:Zinc Phosphate Cement / Q000737:chemistry
D003188:Composite Resins; C483521:Contax; D003738:Dental Cements; D005899:Glass Ionomer Cements; D006047:Gold Alloys; D019279:Resin Cements; C084550:Vitremer; D014867:Water; D015036:Zinc Phosphate Cement; C074226:Harvard Cement