Fracture resistance of premolars with bonded class II amalgams.
This study evaluated the fracture resistance of maxillary premolars with MOD cavity preparation and simulated periodontal ligament. The teeth were restored with silver amalgam (G1), Scotchbond Multi-Purpose Plus and silver amalgam (G2) and Panavia F and silver amalgam (G3). After restorations were made, the specimens were stored at 37 degrees C for 24 hours at 100% humidity and submitted to the compression test in the Universal Testing Machine (Instron). The statistical analysis of the results (ANOVA and Tukey Test) revealed that the fracture resistance of group 2 (G2=105.720 kgF) was superior to those of groups 1 (G1=72.433 kgF) and 3 (G3=80.505 kgF) that did not differ between them.
Department of Restorative Dentistry, State University of Campinas, School of Dentistry, Brasil. paulillo@fop.unicamp.br
Grace Mendonça
GM
Dias de Souza
Gisele Damiana Silveira
GD
Pereira
Carlos Tadeu Santos
CT
Dias
Luis Alexandre Maffei Sartini
LA
Paulillo
D000704:Analysis of Variance; D001641:Bicuspid / Q000503:physiopathology*; D003300:Copper / Q000737:chemistry; D003723:Dental Amalgam / Q000737:chemistry*; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000145:classification; D003793:Dental Restoration, Permanent / Q000145:classification*; D003799:Dental Stress Analysis / Q000295:instrumentation; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D006813:Humidity; D008437:Maxilla; D010513:Periodontal Ligament / Q000503:physiopathology; D019279:Resin Cements / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013223:Statistics as Topic; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014082:Tooth Fractures / Q000503:physiopathology*
D017220:Dentin-Bonding Agents; C438843:Panavia-Fluoro; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; D012834:Silver; D003300:Copper; D003723:Dental Amalgam; C092423:Permite C