3Loguercio,A.D.,J.R.de Oliveira Bauer,et al.In vitro microleakage of packable composites in Class II restorations[J].Quintessence Int,2004,35(1):29-34.
4Chen,H.Y.,J.Manhart,et al.Polymerization contraction stress in light-cured packable composite resins[J].Dent Mater,2001,17(3):253-259.
