联合偶联剂表面处理对金属托槽与不同瓷修复体黏结强度影响的研究

目的:研究四种表面处理方法对三种陶瓷修复体表面处理后与金属托槽间黏结强度的影响。方法:三种不同的瓷粉制作试件并随机分成四个处理组:①酸蚀;②喷砂;③喷砂+偶联剂;④酸蚀+偶联剂。在各组试件表面处理后黏结金属托槽并测量其黏结剪切强度。结果:①经统计学分析,无论对于喷砂还是酸蚀,结合硅烷偶联剂处理后都能显著地提高托槽与瓷修复体表面的黏结强度(P<0.05);而且这种经偶联剂辅助处理后黏结强度提高的特点,是不因为瓷修复体的材料的不同而有显著的差异性的(P>0.05);②酸蚀不同于喷砂,单独处理时达不到临床托槽黏结强度要求,而结合硅烷偶联剂后,其黏结强度有显著的提高(P<0.05);③同一处理方法对不同的陶瓷修复体其黏结剪切强度无统计学差异(P>0.05)。结论:偶联剂作为一种辅助处理措施,可以提高喷砂或酸蚀处理后托槽与瓷修复体表面的黏结强度;联合硅烷偶联剂处理,可使单独应用达不到临床托槽黏结要求的酸蚀表面处理方法,达到临床应用要求。     

Effect of feldspathic ceramic surface treatments on bond strength to resin cement

OBJECTIVE: The objective of this study was to evaluate the shear bond strength of resin cement to feldspathic ceramic with various surface treatments. BACKGROUND DATA: Application of adhesive techniques is well established in restorative dentistry, yet the influence of surface treatments on the bond strength of resin cement to ceramic materials prior to luting or repair procedures remains unclear. METHODS: One hundred samples made of a feldspathic ceramic were divided into 10 groups (n = 10): (1) control (no treatment); (2) 10% hydrofluoric acid (HF); (3) 37% phosphoric acid (H(3)PO(4)); (4) 1.23% acidulated phosphate fluoride acid (APF); (5) diamond bur; (6) air abrasion with Al(2)O(3); (7) Al(2)O(3) + HF; (8) CoJet-Sand; (9) Er:YAG laser, and (10) Al(2)O(3) + Er:YAG laser. Afterwards, silane was applied and a resin cement cylinder was built. After 24 hours at 37 degrees C, the prepared specimens were submitted to a shear bond strength test and stereoscopic evaluation to determine the type of failure after rupture. RESULTS: Bond strength means were statistically different for the different surface treatments. The highest bond strengths were obtained with HF, CoJet-Sand, and Al(2)O(3). The groups treated with Al(2)O(3) + Er:YAG laser, diamond bur, and Al(2)O(3) + HF had moderate bond strengths. The lowest bond strengths were obtained with H(3)PO(4), APF, Er:YAG laser, and the control group. CONCLUSIONS: The HF, CoJet-Sand, and Al(2)O(3) techniques were the most effective surface treatments. The null surface treatment proposed with the Er:YAG laser showed low bond strength, and seems to be inadequate for clinical use with the parameters tested.     

两种处理方法对牙本质剪切强度影响的比较研究

目的：基于牙本质无机改性的理论,对比牙本质粘结前单纯磷酸酸蚀处理、磷酸酸蚀/次氯酸钠联合处理对牙本质剪切强度的影响及树脂-牙本质粘结界面的微形态学观察。方法：选取正畸拔除的健康的年轻前磨牙24颗,制备牙本质粘结面,随机分成A、B两组,每组12颗。粘结前A组以磷酸酸蚀处理、B组以磷酸酸蚀/次氯酸钠联合处理,然后分别涂布溶有荧光剂的粘结剂（Prime＆Bond NT,PB）,充填复合树脂。将粘结试件置于37℃人工唾液中浸泡24h后,经充填体中心,沿牙体长轴纵剖成颊舌两半,分别用于测试剪切强度（Shear Bond Strength,SBS）和激光共聚焦扫描显微镜下（Laser Confocal Scanningi Mcroscope,LCS）M观察粘结界面的微观形态,经t检验对各组测试结果进行统计学分析。结果：A、B两组的剪切强度分别为（26.30±3.51）MPa、（30.13±2.71）Mpa;树脂突长度为（71.27±4.55）μm、（84.95±3.60）μm;混合层厚度为（49.38±4.37）μm、（29.62±2.58）μm,各组之间均存在统计学差异（P〈0.05）。结论：无机改性可有效去除暴露的胶原纤维,增加粘结剂在牙本质粘结面的渗透,提高PB对牙本质的剪切强度。     

瓷表面处理方式对瓷修复体缺损美容修复影响的研究

目的：研究不同瓷表面粗化处理对Vita VMK95瓷粘结强度的影响。方法：瓷片按表面粗化方式分为6组，每组分别与树脂粘结，测剪切强度，统计分析所得数据。结果：喷砂后氢氟酸处理组粘结强度最高，喷砂后磷酸酸蚀组与不喷砂氢氟酸蚀组次之，单纯偶联剂处理组最低。结论：综合临床安全性考虑，喷砂后用磷酸处理是瓷修复体缺损后较好的瓷表面处理方法。     

不同表面处理方法对金属托槽与不同瓷修复体粘结强度影响的研究

目的：研究不同的表面处理方法对金属托槽与不同瓷面粘结强度的影响,为临床托槽粘结前选择合适的陶瓷表面处理方法提供参考依据。方法：选择3种不同的陶瓷材料为研究样本并制作成试件,每种样本按所用的表面处理方法不同分为喷砂、酸蚀、喷砂＋酸蚀处理3个组。使用光固化正畸粘结剂将3种陶瓷试件与金属托槽粘结,在万能材料试验机上剪切、测量后再比较其与金属托槽的抗剪粘结强度。结果：对同一种材料与托槽的粘结强度来说,酸蚀组的粘结强度相对于喷砂＋酸蚀组与喷砂组都要最低（P〉0．05）;而喷砂＋酸蚀组与喷砂组间的粘结强度无统计学差异（P〉0．05）。对于同一种表面处理方法来说,3种材料与托槽的粘结强度无统计学差异（P〉0．05）。3种材料与3种处理方法间无交互作用（P〉0．05）。结论：陶瓷修复体所用材料的不同,不对其与金属托槽的粘结强度造成影响。为了提高陶瓷修复体与金属托槽的粘结强度,相对于酸蚀方法,喷砂处理是一种优选的表面处理方法,而喷砂后的酸蚀处理则是没有必要的。     

The effect of different surface treatments on roughnessand bond strength in low fusing ceramics

The aim of this study was to evaluate the influence of different surface treatments (air abrasion, acid etching, and laser irradiation) on the surface roughness and bond strength of a low fusing ceramic. Thirty-six discs of low fusing ceramic (Finesse, Ceramco) were prepared (10 mm in diameter and 2 mm in thickness) according to the manufacturer’s instructions. Specimens were divided into three groups (n = 12), and the following treatments were performed: Air abrasion with alumina particles (50 μm), acid etching with 5% HF and Nd:YAG laser irradiation (distance: 1 mm, 100 mJ, 20 Hz, 2 W, and 141.54 J/cm²). Following determination of surface roughness (R_a) by profilometry, specimens were examined with scanning electron microscopy (SEM). The luting cement (Clearfil Esthetic Cement) was bonded to the ceramic specimens using Teflon tubes. After 24 h of water storage, shear bond strength test was performed using a universal testing machine at a crosshead speed of 1 mm/min. The data were analyzed with two-way analysis of variance (ANOVA) and Tukey HSD tests (α = .05). Two-way ANOVA indicated that surface roughness was significantly affected by surface treatments (p < .001). Tukey honestly significant difference (HSD) indicated that the air abrasion group had a significantly higher mean value (p < .05) than the other groups. Shear bond strength was significantly affected by surface treatments (p < .001). Tukey HSD indicated that the air abrasion group had a significantly higher mean value (p < .05) than the other groups. No significant difference was found between the acid-etching and laser-irradiation groups (p > .05). The SEM image of the laser irradiation surface appeared to be relatively smooth as compared to the images of other the groups. Air abrasion of low-fusing porcelain surfaces was effective in improving the bond strength as compared to the acid-etching and laser-irradiation methods.     

Bond strength of resin cement to zirconia ceramic with different surface treatments

Zirconia-based ceramics offer strong restorations in dentistry, but the adhesive bond strength of resin cements to such ceramics is not optimal. This study evaluated the influence of surface treatments on the bond strength of resin cement to yttrium-stabilized tetragonal zirconia (Y-TZP) ceramic. Seventy-five plates of Y-TZP ceramic were randomly assigned to five groups (n?=?15) according to the surface treatments [airborne particle abrasion, neodymium-doped yttrium aluminum garnet (Nd:YAG) laser irradiation (Fidelis Plus 3, Fotona; 2 W, 200 mJ, 10 Hz, with two different pulse durations 180 or 320 μs), glaze applied, and then 9.5 % hydrofluoric acid gel conditioned, control]. One specimen from each group was randomly selected, and specimens were evaluated with x-ray diffraction and SEM analysis. The resin cement (Clearfil Esthetic Cement, Kuraray) was adhered onto the zirconia surfaces with its corresponding adhesive components. Shear bond strength of each sample was measured using a universal testing machine at a crosshead speed of 1 mm/min. Bond strengths were analyzed through one-way ANOVA/Tukey tests. Surface treatments significantly modified the topography of the Y-TZP ceramic. The Nd:YAG laser-irradiated specimens resulted in both increased surface roughness and bond strength of the resin cement. The highest surface roughness and bond strength values were achieved with short pulse duration. Nd:YAG laser irradiation increased both surface roughness of Y-TZP surfaces and bond strength of resin cement to the zirconia surface.     

Effect of different surface treatments on tensile bond strength of silicone-based soft denture liner

Failure of the bond between the acrylic resin and resilient liner material is commonly encountered in clinical practice. The purpose of this study was to investigate the effect of different surface treatments (sandblasting, Er:YAG, Nd:YAG, and KTP lasers) on tensile bond strength of silicone-based soft denture liner. Polymethyl methacrylate test specimens were fabricated and each received one of eight surface treatments: untreated (control), sandblasted, Er:YAG laser irradiated, sandblasted + Er:YAG laser irradiated, Nd:YAG laser irradiated, sandblasted + Nd:YAG laser irradiated, KTP laser irradiated, and sandblasted + KTP laser irradiated. The resilient liner specimens (n = 15) were processed between two polymethyl methacrylate (PMMA) blocks. Bonding strength of the liners to PMMA were compared by tensile test with the use of a universal testing machine at a crosshead speed of 5 mm/min. Kruskal–Wallis and Wilcoxon tests were used to analyze the data (α = 0.05). Altering the polymethyl methacrylate surface by Er:YAG laser significantly increased the bond strengths in polymethyl methacrylate/silicone specimens, however, sandblasting before applying a lining material had a weakening effect on the bond. In addition, Nd:YAG and KTP lasers were found to be ineffective for increasing the strength of the bond.     

Effect of a DPSS laser on the shear bond strength of ceramic brackets with different base designs

This study evaluated the shear bond strength (SBS) and adhesive remnant index (ARI) of ceramic brackets with different base designs using a 473-nm diode-pumped solid-state (DPSS) laser to test its usefulness as a light source. A total of 180 caries-free human premolars were divided into four groups according to the base designs: microcrystalline, crystalline particle (CP), dovetail, and mesh. For each base design, teeth were divided into three different subgroups for light curing using three different light-curing units (LCUs) (quartz–tungsten–halogen unit, light-emitting diode unit, and a DPSS laser of 473 nm). Applied light intensities for the DPSS laser and the other LCUs were approximately 630 and 900 mW/cm², respectively. Stainless steel brackets with a mesh design served as controls. The failure modes of debonded brackets were scored using ARI. As a result, brackets bonded using the DPSS laser had the highest SBS values (16.5–27.3 MPa) among the LCUs regardless of base design. Regarding base designs, the CP groups showed the highest SBS values (22.9–27.3 MPa) regardless of LCU. Furthermore, stainless steel brackets with a mesh design had the lowest SBS values regardless of LCU. In many cases, brackets bonded using the DPSS laser had higher ARI scores and had more adhesive on their bases than on tooth surfaces. The study shows that the 473-nm DPSS laser has considerable potential for bonding ceramic brackets at lower light intensities than the other light-curing units examined.     

Tensile bond strength of silicone-based soft denture liner to two chemically different denture base resins after various surface treatments

This study evaluated the effect of various surface treatments on the tensile bond strength of a silicone-based soft denture liner to two chemically different denture base resins, heat-cured polymethyl methacrylate (PMMA), and light-activated urethane dimethacrylate or Eclipse denture base resin. PMMA test specimens were fabricated and relined with a silicone-based soft denture liner (group AC). Eclipse test specimens were prepared according to the manufacturer’s recommendation. Before they were relined with a silicone-based soft denture liner, each received one of three surface treatments: untreated (control, group EC), Eclipse bonding agent applied (group EB), and laser-irradiated (group EL). Tensile bond strength tests (crosshead speed?=?5 mm/min) were performed for all specimens, and the results were analyzed using the analysis of variance followed by Tukey’s test (p?=?0.05). Eclipse denture base and PMMA resins presented similar bond strengths to the silicone-based soft denture liner. The highest mean force was observed in group EL specimens, and the tensile bond strengths in group EL were significantly different (p?<?0.05) from those in the other groups.     

不同瓷表面处理方式对烤瓷-光固化树脂粘接作用的对比研究

目的：比较几种不同瓷表面处理方法对烤瓷－光固化复合树脂粘接强度的影响。评价硅烷偶联剂对粘接强度的影响。方法：烤瓷试件分为四组，分别以8％HF，陶瓷酸蚀剂，1．23％APF凝胶，Nd:YAG激光器作瓷表面处理，每组一半应用偶联剂，一半不用偶联剂，与光固化复合树脂粘接后，经冷热水温差循环试验后测定剪切粘接强度。结果：以上四种手段单独应用时，8％HP睡陶瓷酸蚀剂组高于1．23％APF凝胶和激光组。应用硅烷联剂后每组的剪切粘接强度均有显著提高，但四组之间无显著差异。结论：经瓷表面经硅烷偶联剂处理后有利于提高瓷与树脂间的粘接强度。在适当条件下，1．23％APF的Nd:YAG激光可以代替HF进行瓷表面的处理。     

Effects of post surface treatments including Er:YAG laser with different parameters on the pull-out bond strength of the fiber posts

This study aims to evaluate the effects of Er:YAG laser irradiation under different power settings on the pull-out bond strengths of fiber-reinforced composite posts. The crowns of single-rooted 60 teeth were removed by separation and the root canals were cleaned and shaped. Root canals were filled and post spaces were prepared. Sixty fiber posts were divided into five groups according to surface treatment methods as follows: an untreated control group, a sandblasting-coated group, and three groups undergoing surface preparation with Er:YAG laser under three different power settings (150, 300, and 450 mJ at 10 Hz for 60 s at 100-μs pulse duration). After root canal procedures, fiber posts were cemented to the root canal. After all of the specimens were set, pull-out tests were performed using a universal testing machine at a crosshead speed of 2 mm/min. The data were analyzed using one-way ANOVA and Tukey post-hoc test (p?p?相似文献   

Effect of different mechanical and chemical surface treatments on the repaired bond strength of an indirect composite resin

Lasers in Medical Science - This study compared the effects of two mechanical surface preparation techniques, air abrasion and Nd:YAG laser, with the use of two adhesive systems, self-etch and etch...     

Effect of different surface treatments on roughness of IPS Empress 2 ceramic

The aim of this study was to evaluate the influence of different surface treatments (air abrasion, acid etching, laser irradiation) on the surface roughness of a lithium-disilicate-based core ceramic. A total of 40 discs of lithium disilicate-based core ceramic (IPS Empress 2; Ivoclar Vivadent, Schaan, Liechtenstein) were prepared (10 mm in diameter and 1 mm in thickness) according to the manufacturer’s instructions. Specimens were divided into four groups (n = 10), and the following treatments were applied: air abrasion with alumina particles (50 μm), acid etching with 5% hydrofluoric acid, Nd:YAG laser irradiation (1 mm distance, 100 mJ, 20 Hz, 2 W) and Er:YAG laser irradiation (1 mm distance, 500 mJ, 20 Hz, 10 W). Following determination of surface roughness (R_a) by profilometry, specimens were examined with atomic force microscopy. The data were analysed by one-way analysis of variance (ANOVA) and Tukey HSD test (α = 0.05). One-way ANOVA indicated that surface roughness following air abrasion was significantly different from the surface roughness following laser irradiation and acid etching (P < 0.001). The Tukey HSD test indicated that the air abrasion group had a significantly higher mean value of roughness (P < 0.05) than the other groups. No significant difference was found between the acid etching and laser irradiation (both Er:YAG and Nd:YAG) groups (P > 0.05). Air abrasion increased surface roughness of lithium disilicate-based core ceramic surfaces more effectively than acid-etching and laser irradiation.     

不同粗化处理后瓷表面微观结构的电镜研究

目的：观察不同瓷表面粗化处理方式对瓷微观结构改变的影响。方法：分别对瓷片进行6种不同的表面粗化处理，喷金后扫描电镜观察瓷表面结构。结果：磷酸处理对瓷表面形态未见有明显改变；氢氟酸及喷砂处理对瓷表面形态改变明显。结论：氢氟酸及喷砂处理对瓷表面形态的改变较磷酸处理明显，为临床陶瓷的粘结应用提供参考。     

不同底板结构金属托槽的抗剪切强度研究

目的:比较不同底板设计金属托槽的抗剪切强度(Shear Bond Strength,SBS)及经过37℃人工唾液恒温水浴24h后对其抗剪切强度的影响。方法:选择4种不同底板设计的国产正畸金属托槽(A:传统网状底板;B:新型自锁网状底板;C:华夫样底板;D:燕尾状底板)。将A、B、C、D 4种托槽按是否经过37℃人工唾液恒温水浴,分为水浴组1:A1、B1、C1、D1和非水浴组2:A2、B2、C2、D2共8组,每组10个托槽。将托槽粘结于因正畸需要而拔除的上颌双尖牙上。使用I NSTRON电子万能材料试验机来检测抗剪切强度。粘结断裂的部位用粘结残留指数(Adhesi ve Remnant Index,ARI)来表示。结果:水浴组中C1、D1组的SBS均高于A1、B1,且差异具有显著性(P<0.01);非水浴组中B2、C2、D2组的SBS均显著高于A2组,且差异具有显著性差异(P≤0.001);水浴前后SBS,其中只有B、C两种托槽有差异(P<0.01),水浴组的SBS明显低于非水浴组。结论:托槽底板设计不同能够影响托槽的粘结强度,但所有的样本结果都能很好的满足正畸临床的需求。     

粘结面润湿度对牙本质粘结强度的影响

目的：研究、比较不同粘结面润湿度对4种粘结剂（OptiBond Solo（OB）、Single Bond（SB）、One-Step（OS）、Prime＆Bond NT（PB））牙本质粘结强度的影响。方法：选取36颗无龋坏人磨牙，用600目碳化硅砂纸在流水冲洗下预备出统一的牙本质粘结面玷污层。分别用4种全酸蚀粘结剂在不同粘结面润湿度条件下进行粘结处理。每颗牙齿垂直于粘结面切割出8个1.0mm&#215;1.0mm&#215;4.0mm粘结试件，分别进行微拉伸强度（μTBS）测试。结果：4种粘结剂OB（25.24&#177;2.07）MPa、SB（24.28&#177;4.73）MPa、OS（28.29&#177;4.35）MPa和PB（26.87&#177;4.39）MPa在润湿的牙本质粘结面上均取得了最高的牙本质粘结强度（P〈0.01）。结论：不同粘结面润湿度对不同溶剂粘结剂牙本质粘结强度的影响不同。