Influence of compliance of the substrate materials on polymerization contraction stress in thin resin composite layers.
The present study determined in a laboratory set-up the influence of compliance of the substrate material on polymerisation contraction stress for various thicknesses of bonded dental resin composite films. When the compliance of the tensilometer set-up was increased from 0.029 micron MPa-1 to 0.150 micron MPa-1, the contraction stress in films with a thickness of 100 microns and a diameter of 5.35 mm decreased from 22 to 7 MPa. For the 700 microns samples the stress decreased from 12 to 11 MPa. It was concluded that if compliance from the substrate materials is possible, a thinner resin composite film may effect a more reliable bond.
Alster
D
D
Department of Dental, Materials Science, Academic Centre for Dentiatry Amsterdam, The Netherlands.
Venhoven
B A
BA
Feilzer
A J
AJ
Davidson
C L
CL
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003764:Dental Materials / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012116:Resins, Plant / Q000737:chemistry*; D013314:Stress, Mechanical
D003764:Dental Materials; D011108:Polymers; D012116:Resins, Plant