Influence of luting material filler content on post cementation.
Luting of fiber posts to intra-radicular dentin represents the worst-case scenario in terms of control of polymerization shrinkage. This study tested the hypothesis that filler content of resin cements does not influence luting of fiber posts to intra-radicular dentin, by assaying polymerization stress, push-out bond strength, and nanoleakage expression. The polymerization stress of experimental cements containing 10%, 30%, 50%, or 70% in filler content was investigated. Post spaces were prepared in endodontically treated teeth, and fiber posts were cemented with the experimental cements. A push-out test was performed, and interfacial nanoleakage expression was analyzed. Results showed that luting cements with higher filler content were related to increased polymerization stress (p < 0.05), decreased push-out bond strength (p < 0.05), and increased interfacial nanoleakage expression (p < 0.05). Conversely, lower-stress luting materials increased bonding of fiber posts to intra-radicular dentin. Further in vivo studies are needed to investigate the long-term clinical performance of these materials.
Department of Fixed Prosthodontics and Dental Materials, University of Siena, Italy.
M
M
Ferrari
C A
CA
Carvalho
C
C
Goracci
F
F
Antoniolli
A
A
Mazzoni
G
G
Mazzotti
M
M
Cadenaro
L
L
Breschi
D000268:Adhesiveness; D017607:Aluminum Compounds / Q000737:chemistry; D002484:Cementation / Q000379:methods*; D001840:Dental Bonding; D003763:Dental Leakage / Q000145:classification; D017267:Dental Prosthesis Design; D003786:Dental Pulp Cavity / Q000648:ultrastructure; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D010316:Particle Size; D011108:Polymers / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry*; D017655:Silicon Compounds / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D019553:Tooth, Nonvital / Q000473:pathology
D017607:Aluminum Compounds; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D011108:Polymers; D011140:Polyurethanes; D019279:Resin Cements; D017655:Silicon Compounds; C532387:XP-Bond; C029824:urethane dimethacrylate luting resin; C008384:methacrylic acid; D012822:Silicon Dioxide; C020328:fluoroaluminum silicate; D005459:Fluorides