Properties of Hybrid Resin Composite Systems ... | 合法醫療器材資訊網

由JTBlackham著作·2009·被引用104次—14TheKnoophardnessofhybridresincompositesistypicallygreaterthanthatofmicrofillresincomposites,becauseofthehardnessandvolume ...

The following resin composite restorative groups were evaluated—two hybrids (Esthet-X, Dentsply, Milford, DE, USA; and Filtek Z250, 3M ESPE, St Paul, MN, USA), one microfill (Durafill VS, Kulzer, Armonk, NY, USA) and two new hybrid systems containing pre-poly-merized particles (Premise, SDS/Kerr, Orange, CA, USA; Gradia Direct Posterior, GC America, Alsip, IL, USA) (Table 1[1]). The following properties were examined per composite: diametral tensile strength, flexural strength/modulus, Knoop microhardness and polymerization shrinkage. Eight specimens were prepared for each of the five restorative materials for each property tested (n=8).

For diametral tensile strength (DTS) testing, a stainless-steel mold (Sabri, Downers Grove, IL, USA) 3-mm in length and 4-mm in diameter, was placed on a Mylar-strip covered glass slide. The restorative materials were packed into the mold and completely filled. Th...