摘要
目的评价不同氢氟酸处理时间对玻璃陶瓷表面与树脂粘接耐久性的影响，以期为玻璃陶瓷表面氢氟酸处理时间的正确选择提供临床参考。方法可切削玻璃陶瓷（ProCAD）表面接受4．8％氢氟酸处理0S（对照组）、30S（30S氢氟酸处理组）和60s（60s氢氟酸处理组），每组32个陶瓷片。使用三维激光共聚焦显微镜测量陶瓷片表面粗糙度参数（aa）和表面积。陶瓷片与4种粘接套装（硅烷偶联剂和树脂粘接剂：A：MonobondS和Variolink1I；B：Clearfil Ceramic Primer和Clearfil Esthetic Cement；C：GCCeramicPrimer和LinkmaxHV；D：PorcelainLinerM和SuperBond）粘接形成粘接试件，每组16个陶瓷片直接测量粘接强度，16个陶瓷片经30000次冷热循环后测量粘接强度。结果对照组、30和60S氢氟酸处理组Ra值[分别为（3．89±1．94）、（12．53±0．80）、（13．58±1．10）μm]及表面积[分别为（7．81±2．96）、（30.18±2．05）、（34．16±1．97）mm^2]随着氢氟酸处理时间的延长而显著增加（P〈0．05）。同种粘接套装相同氢氟酸处理时间下冷热循环后试件的粘接强度均显著低于冷热循环前（P〈0．05）。冷热循环后粘接套装A、B的粘接强度随着氢氟酸处理时间的延长而显著增加[A：分别为（3．59±3．51）、（16．18±2．62）、（20．33±2．45）MPa；B：分别为（4．74±2．08）、（7．77±1．55）、（13．45±3．75）MPa]；粘接套装D30S氢氟酸处理组的粘接强度[（22．00±1．64）MPa]显著高于相应对照组[（12．96±4．17）MPa]，但与60S氢氟酸处理组[（20．42±3．01）MPa]相比，差异无统计学意义（P〉0．05）；氢氟酸处理时间未对粘接套装C的粘接强度产生显著影响。结论氢氟酸处理能提高玻璃陶瓷与树脂的粘接耐久性，氢氟酸处理时间的选择不仅取决于陶瓷表面结构的变化，也取决于所使用的粘接套装。
Objective To analyze the effect of hydrofluoric acid （HFA） etching time on the resin bond durability of glass ceramic. Methods Three groups of samples of machinable glass ceramic （ProCAD） were etched by 4. 8% HFA for 0, 30 and 60 s respectively. The roughness parameters（Ra, Sin, S） and surface area of the samples, were measured with a 3D-laser scanning microscope. Then the ceramic surfaces were bonded with four resin cements（ silane coupler/resin cement） , which were Monobond S/Variolink Ⅱ , Clearfil Ceramic Primer/Clearfil Esthetic Cement, GC Ceramic Primer/Linkmax HV, and Porcelain Liner M/SuperBond. The micro-bond strengths between the ceramic and the resin were tested at baseline and after the samples had been treated in 30 000 thermal cycles. Results The Ra [ （ 3.89 ± 1.94 ）, （ 12. 53 ± 0. 80）, （ 13.58 ± 1.10） μm] and surface area[ （7.81 ±2. 96）, （30. 18 ±2. 05）, （34. 16±1.97） mm^2 ] of ceramic increased with the increase of HFA etching time. The thermal cycling test reduced the bond strength of all test groups. The bond strength of Monobond S/Variolink Ⅱ group[ （3.59 ± 3.51 ） , （ 16. 18 ± 2.62） , （20. 33 ±2.45） MPa] and Clearfil Ceramic Primer/Clearfil Esthetic Cement group[ （4. 74±2.08） , （ 7.77 ± 1.55 ）, （ 13.45± 3.75） MPa ] increased with the increase of HFA etching time ; 30 s HFA etching group of Porcelain Liner M/SuperBond had higher bond strength [ （22. 00± 1.64） MPa] than its 0 s HFA etching group [ （12. 96 ±4. 17） MPa] , and no significant difference was found between the 30 s and 60 sHFA etching groups of Porcelain Liner M/SuperBond [ （20. 42± 3.01 ） MPa]. HFA etching time had no effect on the bond strength of GC Ceramic Primer/Linkmax HV. Conclusions HFA etching can improve the resin bond durability of glass ceramic, and the etching time is not only related to the change of ceramic surface roughness and area, but also to the characteristics of resins.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2010年第5期307-312,共6页
Chinese Journal of Stomatology
