Shock-absorbing behavior of five restorative materials used on implants.
The damping effect of five restorative materials used to veneer test crowns rigidly connected to a Brånemark implant and subjected to an impact force was measured. These materials included a gold alloy; a noble metal ceramic alloy; porcelain; a laboratory-processed, light-activated microfilled resin; and a heat- and pressure-polymerized poly(methyl methacrylate) resin. The two resins were found to reduce the impact force by about 50% when compared to porcelain or the alloys. The clinical significance of the results is discussed.
Gracis
S E
SE
Department of Restorative Dentistry, University of Washington School of Dentistry, Seattle 98195.
Nicholls
J I
JI
Chalupnik
J D
JD
Yuodelis
R A
RA
D000180:Acrylic Resins; D000704:Analysis of Variance; D001732:Bite Force; D003188:Composite Resins; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D003764:Dental Materials; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D003801:Dental Veneers; D004548:Elasticity; D006047:Gold Alloys; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D008768:Methylmethacrylates; D014093:Tooth, Artificial
D000180:Acrylic Resins; D003188:Composite Resins; D015921:Dental Implants; D003764:Dental Materials; D006047:Gold Alloys; D016876:Metal Ceramic Alloys; D008768:Methylmethacrylates; C046981:ESPE Visio-Gem; D003776:Dental Porcelain