磷酸酯单体对口腔氧化锆陶瓷粘接耐久性的影响

目的探讨含甲基丙烯酰癸基二氢磷酸酯(methacryloyloxydecyl dihydrogen phosphate,MDP)的底涂剂、通用粘接剂和自粘接树脂水门汀对口腔氧化锆陶瓷粘接耐久性的影响。方法制作氧化钇稳定的四方相氧化锆瓷片210个,氧化铝表面喷砂后分为7组(每组30个),以不含MDP的传统树脂水门汀作为对照组,其余6组分别应用两种含MDP的氧化锆底涂剂联合传统树脂水门汀(底涂剂组)、两种含MDP的通用粘接剂联合传统树脂水门汀以(粘接剂组)及两种含MDP的自粘接树脂水门汀(自粘接树脂水门订组),粘接氧化锆瓷片和复合树脂,制作粘接试件。试件制成后每组半数37℃水储存24 h(老化前),另一半37℃水储存12个月(老化后);测试剪切强度(即粘接强度)并分析断裂模式。结果水储存老化前与对照组较低的粘接强度[(5.04±0.50)MPa]相比,其他6组粘接强度均显著增加(P<0.05),均可达到9.51 MPa以上;其中2个自粘接树脂水门汀组粘接强度均较高,最大为(11.06±0.84)MPa。水储存老化后各组粘接强度均比老化前显著降低(P<0.05),除对照组外,其余6组粘接强度仍在7.44 MPa以上;其中2个自粘接树脂水门汀组及1个粘接剂组维持较高的粘接效果,且与2个底涂剂组的差异均有统计学意义(P<0.05)。结论含MDP的产品可提高口腔氧化锆陶瓷的粘接耐久性,且不同产品类型对口腔氧化锆陶瓷粘接耐久性有不同的影响。

Effects of methacryloyloxydecyl dihydrogen phosphate on bond durability of zirconia

Objective To evaluate the bond performance of primers,universal adhesives and self-adhesive resin cements containing methacryloyloxydecyl dihydrogen phosphate(MDP)to zirconia.Methods Two hundred and ten yttria-stabilized tetragonal zirconia polycrystal(Y-TZP)plates were prepared and divided into seven groups according to each of six MDP-containing products and one MDP-free resin cement.Two primers,two universal adhesives and two self-adhesive resin cements were applied on the specimens after these specimens recived alumina air abrasion.The group of MDP-free resin cement was set as control.Each group contained 30 specimens.Y-TZP plates were bonded to resin composite to build resin bonding specimens,and half of these plates were stored in distilled water at 37℃for 24 hours,the other half were stored for 12 months.Shear bond strength(SBS)test and fracture modes analysis were performed.Results The SBS values of all the experimental groups were above 9.51 MPa,which increased 24-hour values compared to the(5.04±0.50)MPa of the control group.Group using one of the self-adhesive resin cement yielded the highest SBS,(11.06±0.84)MPa.SBS of all groups decreased significantly compared to 24-hour SBS after aging(P<0.05),however,the SBS values of MDP-containing products groups can still be maintained above 7.44 MPa.Two self-adhesive cement groups and one of the universal adhesive group maintained higher SBS values,and the values were statistical different from those from the two primer groups(P<0.05).Conclusions Different MDP-containing products have different effects on the bond durability of zirconia.