Micro-Shear Bond Strength of Novel MDP Calcium-Fluoride-Releasing Self-Adhesive Resin Cement After Thermocycling
Micro-Shear Bond Strength of Novel MDP Calcium-Fluoride-Releasing Self-Adhesive Resin Cement After Thermocycling
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DOI：
10.11607/prd.3992
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发表时间：
2020-05-01
影响因子：
1.6
通讯作者：
Kamel, Samah Mohamed
中科院分区：
文献类型：
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作者：
Mahrous, Aliaa;Radwan, Mohamed M.;Kamel, Samah Mohamed
本研究的目的是：(1)研究一种新型甲基丙烯氧基十烷基二氢磷酸（MDP）氟化钙释放自粘树脂水泥（TheraCem， BISCO）在热循环后与牙齿结构（牙釉质和牙本质）和钇稳定氧化锆的微剪切结合强度和破坏模式，(2)将结果与通用的不含MDP的自粘树脂水泥（RelyX Unicem, 3M ESPE）作为对照进行比较。牙釉质和牙本质标本（各20片）使用钻石锯（IsoMet 4000, Buehler）和大量水冷却剂获得。从IPS e.max ZirCAD块（Ivoclar Vivadent）中获得20块氧化锆板，并在inFire HTC高速高温炉（Dentsply Sirona）中烧结。在粘接表面制作树脂-水泥微柱，并填充测试水泥（每种表面/水泥组合n = 10）： A组（对照组）使用不含MDP的RelyX， B组（测试水泥）使用含MDP的TheraCem MDP。骨水泥静置5分钟自愈。所有样品均热循环5000次（THE-1100, SD Mechatronik）。使用万能试验机测量微剪切粘结强度，并使用附有能量色散x射线（EDX）装置的扫描电子显微镜（量子250场发射枪，FEI）检查剥离表面的所有形态和超微结构变化，进行破坏模式分析。对结果进行统计学分析。TheraCem的微剪切强度（MPa）略高于RelyX。在牙釉质内，TheraCem （6.46 +/- 1.37 MPa）的平均mu-SBS值显著高于RelyX (3.04 +/- 0.99 MPa) （P = 0.002）。同样，TheraCem在牙本质中的平均值（10.67 +/- 1.27 MPa）显著高于RelyX (6.46 +/- 1.74 MPa) （P = 0.014）。氧化锆方面，TheraCem （39.76 +/- 1.18 MPa）的平均mu-SBS值显著高于RelyX (27.04 +/- 1.92 MPa) （P < 0.001）。使用含mdp的氟化钙释放自粘树脂水泥（TheraCem）可以提高与所有测试基质（牙釉质、牙本质和氧化锆）的结合强度，对于许多临床医生来说，这是一种很有前途的水泥。需要进一步的临床研究来提供长期的临床成功数据。
The purpose of the present study was to (1) investigate the micro-shear bond strength and failure mode of a novel methacryloxydecyl-dihydrogen-phosphate (MDP) calcium-fluoride-releasing self-adhesive resin cement (TheraCem, BISCO) to a tooth structure (enamel and dentin) and to yttrium-stabilized zirconia after thermocycling, and to (2) compare the results with a universal non-MDP-containing self-adhesive resin cement (RelyX Unicem, 3M ESPE) as a control. Enamel and dentin specimens (20 discs each) were obtained by using a diamond saw (IsoMet 4000, Buehler) with copious water coolant. Twenty zirconia plates were obtained from IPS e.max ZirCAD blocks (Ivoclar Vivadent) and sintered in an inFire HTC speed high-temperature furnace (Dentsply Sirona). Resin-cement micro-cylinders were created on the bonded surface and filled with the tested cements (n = 10 for each surface/cement combination): Group A (control) used non-MDP-containing RelyX, while group B (tested cement) used MDP-containing TheraCem MDP. Cements were left to self-cure for 5 minutes. All specimens were thermocycled for 5,000 cycles (THE-1100, SD Mechatronik). Micro-shear bond strength was measured using a universal testing machine, and debonded surfaces were examined for failure mode analysis with all morphologic and ultrastructure changes using a scanning electron microscope (Quanta 250 Field Emission Gun, FEI) attached with an energy dispersive x-ray (EDX) unit. The results were statistically analyzed. TheraCem had a slightly higher micro-shear bond strength (MPa) value than RelyX. Within enamel, TheraCem (6.46 +/- 1.37 MPa) had a significantly higher mean mu-SBS value than RelyX (3.04 +/- 0.99 MPa) (P = .002). Similarly, TheraCem in dentin (10.67 +/- 1.27 MPa) had a significantly higher mean value than RelyX (6.46 +/- 1.74 MPa) (P = .014). As for zirconia, TheraCem (39.76 +/- 1.18 MPa) had a significantly higher mean mu-SBS value than RelyX (27.04 +/- 1.92 MPa) (P < .001). Using MDP-containing calcium-fluoride-releasing self-adhesive resin cement (TheraCem) may improve bond strength to all tested substrates (enamel, dentin, and zirconia) and can be considered a promising cement for many clinicians. Further clinical studies are required to provide long-term clinical success data.