非熱電漿改善牙科氧化鋯與複合樹脂之鍵結強度

本研究使用電漿處理的方式對氧化鋯做表面處理，探討電漿處理對於氧化鋯表面的型態結構，以及氧化鋯與複合樹脂剪切黏結強度之影響。實驗組是將氧化鋯進行電漿處理 (100W、200W、400W)，另一部分的氧化鋯試片進行噴砂加電漿處理。利用SEM、EDS、XRD和XPS觀察分析氧化鋯表面的結構及組成，接著測試氧化鋯表面的接觸角和粗糙度。以桌上型強度試驗機 (EZ-test) 測試氧化鋯與複合樹脂之間的剪切黏結強度，並計算氧化鋯表面的樹脂殘留量，用來評估破斷模式。實驗結果顯示SEM觀察到經噴砂處理後的氧化鋯表面結構與對照組不同，而在經過不同功率電漿處理的試片表面觀察不到有不同的結構。XRD分析結果證明電漿處理沒有影響氧化鋯的相變化。XPS分析結果表示電漿處理後氧化鋯表面上的氧 (O) 確實有提高。此外結果顯示經過電漿處理過後的氧化鋯試片 (C1、C2、C4、SB1、SB2、SB4) 角度明顯變小，提高了氧化鋯的親水性。從剪切黏結強度測試可以觀察到各實驗組強度都顯著高於對照組，經過噴砂加電漿處理的SB4組顯示出的剪切黏結強度最高。經過破斷模式分析顯示對照組和噴砂組都為黏結破壞，經電漿處理的組別為混合破壞。本實驗結果證實電漿處理可以提高氧化鋯和複合樹脂之間的黏結強度，而最高的剪切黏結強度SB4組別，證明增加電漿功率確實可以提高氧化鋯和複合樹脂之間的鍵結強度，並且噴砂處理也是不可或缺的表面處理方法。

In this study, the surface treatment of zirconia is carried out by plasma treatment, and the effect of plasma treatment on the surface structure of zirconia and the shear bond strength of zirconia and composite resin are discussed. In the experimental group, zirconia was plasma treated (100W, 200W, 400W), and the other part of the zirconia sample was blasted and plasma treated. The structure and composition of the zirconia surface were observed and analyzed by SEM, EDS, XRD, and XPS, and then the contact angle and roughness of the zirconia surface were tested. EZ-test was used to test the shear bond strength between zirconia and composite resin, and the amount of resin remaining on the surface of zirconia was calculated to evaluate the braking mode. The experimental results show that the SEM observed that the surface structure of the zirconia after sandblasting was different from that of the control group, but the no different structure was observed on the surface of the sample treated with a plasma of different power. XPS analysis results indicate that oxygen (O) on the surface of zirconia did increase after plasma treatment. Also, the results showed that the angle of the zirconia samples (C1, C2, C4, SB1, SB2, SB4) after plasma treatment was significantly reduced, which improved the hydrophilicity of zirconia. From the shear bond strength test, it can be observed that the strength of each experimental group is significantly higher than that of the control group. The SB4 group treated by sandblasting and plasma treatment show the highest shear bond strength. The analysis of the breaking mode showed that both the control group and the sandblasting group were a cohesive failure, and the plasma-treated group was a mixed failure. The results of this experiment confirmed that the plasma treatment can improve the bonding strength between zirconia and the composite resin, and the highest shear bonding strength SB4 group proves that increasing the plasma power can indeed improve the bonding strength between zirconia and the composite resin and sandblasting is also an indispensable surface treatment method.