氢氟酸和偶联剂的应用对e.max(R) Press铸瓷与树脂水门汀黏结强度的影响

目的:观察酸蚀和偶联剂处理IPS e.max Press铸瓷对瓷与树脂水门汀黏结强度的影响.方法:将126个试件分为7组,分别以50 g/L氢氟酸酸蚀0、10、20、30、60、120、180 s后一半使用偶联剂,一半不使用偶联剂,与树脂水门汀黏结后测定剪切黏结强度,每组取2个试件进行扫描电镜观察.结果:仅酸蚀组的黏结强度最高可达33.98MPa(60s),对照组6.76MPa;单纯使用偶联剂可达22.23 MPa,结合酸蚀最高可达35.16MPa(30 s);扫描电镜可见酸蚀时间不同及是否使用偶联剂与瓷表面微观形貌有直接关系.结论:瓷酸蚀后配以偶联剂的使用可提高黏结强度,并可在较短时间就获得理想的黏结强度.     

不同表面处理对义齿软衬树脂黏结强度的影响

目的:探讨4种不同表面处理对义齿软衬树脂与硬质树脂之间黏结强度影响。方法:制作热凝硬质基托树脂试件(直径8mm,长度15mm)和热凝义齿软衬树脂试件(厚4mm,直径10mm),然后将2个硬质树脂试件黏结在软衬树脂正反两面的中心。采用4种不同表面处理方式——第1组,对照组,不加任何处理;第2组,喷砂粗化处理;第3组,专用黏结剂涂布表层;第4组,表层涂布 喷砂粗化。每组各10个试件,分别测定黏结强度,采用SPSS10.0软件进行单因素方差分析。结果:第1、2、3、4组的平均黏结强度分别为3.518、2.834、4.077和3.852MPa。F=6.40,P<0.0014。表层涂布组的黏结强度最高,而喷砂组的黏结强度最低。结论:使用专用黏结剂表层涂布,可显著增强义齿软衬树脂的黏结强度;而进行喷砂处理,反而会使黏结强度下降。     

不同硅烷偶联剂对瓷和树脂之间黏接强度的影响

目的：比较瓷表面不同酸蚀状态下，4种硅烷偶联剂对瓷和树脂之间黏接强度的影响。方法：将64个瓷试件按照所使用硅烷偶联剂的不同分为4组，每组包括磷酸和氢氟酸处理两个亚组。表面处理完成后将瓷试件与复合树脂黏接，测试剪切强度。结果：氢氟酸与两种双组分偶联剂相配合产生的黏接强度最高（p〈O．05），两种单组分偶联剂与氢氟酸配合使用的效果同两种双组分偶联剂与磷酸配合使用的效果没有显著差异如〉O．05）。结论：不同种类偶联剂对瓷和树脂之间的黏接强度有明显影响，选用合适的双组分硅烷偶联剂与磷酸处理相配合，足以产生满足临床要求的黏接强度。     

不同表面处理方式对润瓷与树脂水门汀黏结强度的影响研究

目的　研究不同表面处理方式对润瓷与树脂水门汀黏结强度的影响。方法　将润瓷切割成12 mm × 14 mm × 8 mm和12 mm × 14 mm × 3 mm两种尺寸的试件，每种尺寸的试件随机分成6组，分别进行不同的表面预处理：未处理组（NT组）、硅烷化处理组（Si组）、氢氟酸组（HF组）、氢氟酸联合硅烷化处理组（HF+Si组）、喷砂组（SB组）、喷砂联合硅烷化处理组（SB+Si组）。使用树脂水门汀将各组12 mm × 14 mm × 8 mm的试件两两黏结，制作微拉伸试件，37℃去离子水中水浴24 h后进行微拉伸强度测试。12 mm × 14 mm × 3 mm的试件用于测量预处理后的试件表面粗糙度，并扫描电镜观察表面形貌。将微拉伸黏结强度及粗糙度测量结果采用SPSS 22.0软件进行单因素方差分析。结果　不同表面处理方式对润瓷的黏结强度和粗糙度均有明显影响（F值分别为7.228、551.032，P < 0.05）。HF组和SB组黏结强度和粗糙度均大于NT组，差异有统计学意义（P < 0.05），且SB组的粗糙度明显高于HF组（P < 0.05），但两者黏结强度差异无统计学意义（P > 0.05）。Si组黏结强度大于NT组（P < 0.05），但两组粗糙度比较，差异无统计学意义（P > 0.05）。HF+Si组黏结强度明显低于HF组（P < 0.05）。SB+Si组黏结强度和粗糙度与SB组相比，差异无统计学意义（P > 0.05）。结论　氢氟酸处理、喷砂处理和硅烷化处理的单独应用均可不同程度地提高润瓷的黏结强度，而氢氟酸处理不适合与硅烷化处理联合应用。     

光固化复合树脂与金属基底的瓷剥脱面间的粘结强度

目的：测定光固化复合树脂与金属烤瓷修复体金属基底的瓷剥脱面间的粘结强度,评价有机硅烷偶联剂对粘结强度的影响。方法：钴铬合金的瓷剥脱面用氧化铝喷砂、氢氟酸蚀刻后分为6个组,每组一半使用偶联剂,一半不使用偶联剂,分别与6种光固化复合树脂粘结,粘结试件经过冷热水温差循环后测定剪切粘结强度。结果：有偶联剂组剪切粘结强度为10．16～15．54MPa,分别高于无偶联剂组剪切粘结强度(6．11～9．01MPa);其中两种光固化复合树脂的粘结强度高于其它四种树脂。结论：光同化复合树脂与金属基底的瓷剥脱面间可获得较高的粘结强度,金属基底的瓷剥脱面经有机硅烷偶联剂处理后有利于提高其与树脂间的粘结强度不同的树脂类型对二间的粘结强度有影响。     

自粘接树脂水门汀与两种粗化处理的二硅酸锂陶瓷的粘接性能评价

摘要］目的：评价自粘接树脂水门汀与喷砂和氢氟酸酸蚀两种方式粗化处理的二硅酸锂陶瓷的粘接强度及耐久性。材料和方法：制作二硅酸锂瓷片183个,烧结后随机分为2组分别进行氢氟酸酸蚀和喷砂,随后根据粘接策略的不同分为RU（RelyX Unicem）、RU200(RelyXTM U200)以及RV(silane+RelyX Veneer) 3个亚组分别制作粘接试件。各组试件一半于37℃下水储24h,另一半进行20000次冷热循环,随后测试剪切粘接强度。氢氟酸酸蚀、喷砂及未进行粗化处理的陶瓷试件采用扫描电镜观察表面形貌。结果：氢氟酸组产生显著高于喷砂组的粘接强度（p<0.05）;单纯应用自粘接树脂水门汀组的粘接效果与传统树脂水门汀结合硅烷预处理组无统计学差别（p=0.057）;所有组的粘接强度在老化后均显著降低（p<0.05）。结论：氢氟酸酸蚀可以获得较氧化铝喷砂处理更佳的粘接效果;自粘接树脂水门汀在无需硅烷预处理的条件下用于二硅酸锂陶瓷的粘接可获得较好的粘接效果。     

表面处理对Cercon氧化锆陶瓷黏结强度的影响

目的:探讨适合牙科氧化锆陶瓷黏结的表面处理方法。方法:将烧结后的氧化锆陶瓷片分为4组,每组16片,分别采用4种方式(不处理,HF酸蚀 硅烷偶联剂,喷砂 硅烷偶联剂,硅烷偶联剂)处理氧化锆陶瓷片表面并与树脂黏结剂黏结,在水浴24h和水浴30d后测试其黏结抗剪强度,数据用SAS6.12软件加以统计分析,用扫描电镜观察4种处理后的陶瓷表面形貌。结果:喷砂处理后的氧化锆陶瓷的黏结强度为:(34.7±3.44)MPa(水浴24h),(31.5±3.34)MPa(水浴30d),和其他组黏结强度差别有统计学意义(P<0.01),而其他3组间差别均无统计学意义(P>0.05)。结论:喷砂处理的氧化锆陶瓷的黏结强度最高,喷砂是适合牙科氧化锆陶瓷黏结的表面处理方法。     

纳米硅涂层对Cercon氧化锆陶瓷与牙本质黏结强度的影响

目的:探讨利用溶胶凝胶法进行纳米硅涂层表面处理对Cercon氧化锆陶瓷黏结强度的影响.方法:将烧结后的氧化锆陶瓷分为4组,每组16片,分别采用4种方式(空白对照、喷砂、喷砂+硅烷偶联剂、喷砂+纳米硅涂层+硅烷偶联剂)处理氧化锆陶瓷片表面,并通过树脂黏结剂与牙本质黏结,在水浴24h后测试其黏结剪切强度.采用SAS6.12软件包对数据进行方差分析,用扫描电镜观察处理后的陶瓷表明形貌.结果:喷砂+纳米硅涂层+硅烷偶联剂表面处理的氧化锆陶瓷的黏结强度最高,与其他各组黏结剪切强度的差别均有显著性(P=0.000):喷砂+硅烷偶联剂组与喷砂组之间差别无统计学意义(P=0.827);喷砂+硅烷偶联剂组和喷砂组与空白组比较均有统计学意义(P=0.001).结论:通过溶胶凝胶法在喷砂后的陶瓷表面制备纳米硅涂层配合使用硅烷偶联剂.可以显著提高Cercon氧化锆陶瓷的黏结强度.     

不同粘接材料及表面处理方法对瓷与托槽粘结强度的影响

目的：探讨不同粘接材料及不同表面处理方法对瓷与托槽粘结强度的影响。方法：将烤瓷试样按喷砂＋氢氟酸酸蚀＋陶瓷偶联剂、喷砂＋氢氟酸酸蚀、喷砂＋陶瓷偶联剂分成A、B、C三组进行不同方法表面处理,然后分别用3M光固化型、3M化学固化型、西湖巴尔化学固化型、京津化学固化型釉质粘结剂粘结金属托槽。力学材料试验机上剪切法去除托槽,测定各自的抗剪切强度,并用ARI积分法记录托槽去除后瓷面上粘接剂残留指数,以上所有数据进行统计分析。结果：无论抗剪切强度还是瓷面上粘接剂残留指数,A、B组均大于C组（P＜0．05）,A、B组间无差异（P＞0．05）;3M光固化型粘结剂大于3M化学固化型、杭州西湖化学固化型粘结剂（P＜0．05）,3M化学固化型、杭州西湖化学固化型两种粘结剂间无差异（P＞0．05）,3M化学固化型、杭州西湖化学固化型两种粘结剂大于京津化学固化型粘结剂（P＜0．05）,3M光固化型粘结剂显著大于京津化学固化粘结剂（P＜0．01）。结论：喷砂结合氢氟酸酸蚀瓷面粘结托槽效果较好,陶瓷偶联剂并不能增加其粘结强度;3M光固化粘结剂在瓷面上粘结效果最好,3M化学固化粘结剂、杭州西湖化学固化粘结剂次之,推荐使用3M光固化型粘结剂。     

钛表面预处理对钛-瓷剪切结合强度影响的研究

目的　探讨不同的钛表面预处理对自制新型镧系低熔瓷的钛-瓷结合强度的影响,为自行研制钛瓷瓷粉体的临床应用奠定理论基础。方法　钛表面分别经不同粒度的Al2O3喷砂粗化、偶联剂处理及预氧化处理;制作棒、盘试件,用压出法测试钛-瓷间的剪切结合强度,用扫描电子显微镜(SEM)及电子探针(EPMA),从微观和相关元素方面观察钛-瓷界面。结果　80~250μm 5种不同粒度的Al2O3喷砂处理钛表面后,对钛-瓷剪切结合强度无明显影响;自制硅偶联剂使剪切结合强度降低;钛表面预氧处理对剪切结合强度无明显影响。结论　镧系低熔瓷对钛表面具有良好的湿润性;钛金属表面硅偶联剂处理或预氧化处理是不必要的;在一定范围内,剪切结合强度受钛表面粗糙度的影响较小。     

Shear bond strength of resin cements to both ceramic and dentin

STATEMENT OF PROBLEM: All ceramic restorations benefit from resin cement bonding to the tooth. However, the literature is unclear on which cement, ceramic conditioning treatment, and dentin bonding agent produce the highest and longest-lasting bond strength. PURPOSE: This in vitro study evaluated immediate and 6-month shear bond strengths between a feldspathic ceramic and 4 different resin cements with the use of 6 different surface-conditioning treatments. Shear bond strengths between the 4 resin cements and dentin also were measured. MATERIAL AND METHODS: Four hundred eighty discs (10 mm in diameter and 4 mm thick) of Ceramco II porcelain were randomly divided into 6 main groups (n = 80). The ceramic specimens received 6 different surface conditioning treatments before the application of resin cement. These surface treatments were sanding with 600-grit silicon carbide paper, microetching with aluminum oxide, sanding followed by silane application, microetching followed by silane application, hydrofluoric acid-etching, and hydrofluoric acid-etching followed by silane application. Each group then was subdivided into 4 subgroups (n = 20) for the application of 1 of 4 cements: Nexus, Panavia 21, RelyX ARC, and Calibra. All cemented specimens were tested under shear loading until fracture on a universal testing machine; the load at fracture was reported in MPa as the bond strength. Bond strengths were determined at 24 hours and after 6 months of specimen storage in a saline solution. For dentin-resin cement shear bond strength testing, dentin specimens were treated with dentin bonding agents, and a thin layer of resin cement was applied according to the manufacturer's directions. Prodigy composite was bonded to the cement. Shear bond strengths were determined as above and reported in MPa at fracture. Data were analyzed with 3-way analysis of variance (P<.01). RESULTS: Hydrofluoric acid-etching followed by silane application produced bond strengths (15.0 +/- 7.4 to 21.8 +/- 5.8 MPa) in the highest statistical group with all 4 cements at both 24 hours and 6 months (P<.01). Sanding with 600-grit silicon carbide paper and microetching with aluminum oxide produced the lowest bond strengths (0.0 to 4.0 +/- 3.5 MPa). At 24 hours and 6 months, there were no significant differences among the 4 cements when hydrofluoric acid-etching was followed by silane application. Both auto- and light-polymerized dentin bonding agents bonded better to dentin than dual-polymerized bonding agents. CONCLUSION: Within the limitations of this study, hydrofluoric acid-etching followed by silane application produced the best bonds at 24 hours and 6 months with all 4 cements. Auto- and light-polymerized adhesives were associated with higher bond strengths to dentin than dual-polymerized adhesives.     

Bonding between resin luting cement and glass infiltrated alumina-reinforced ceramics with silane coupling agent

The purpose of this study was to evaluate the shear bond strengths of three dual-cured resin luting cements (Linkmax HV, Panavia Fluoro Cement, and RelyX ARC) to glass-infiltrated alumina-reinforced ceramic material and the effect of four silane coupling agents (Clearfil Porcelain Bond, GC Ceramic Primer, Porcelain LinerM, and Tokuso Ceramic Primer) on the bond strength. The two type-shaped of In-Ceram alumina ceramic glass-infiltrated specimens were untreated or treated with one of the four ceramic primers and then cemented together with one of the three dual-cured resin luting cements. Half of the specimens were stored in water at 37 degrees C for 24 h and the other half thermocycled 20,000 times before shear bond strength testing. Surface treatment by all silane coupling agents improved the shear bond strength compared with non-treatment. The specimens treated with Clearfil Porcelain Bond showed significantly greater shear bond strength than any of the other three silane coupling agents regardless of resin luting cements and thermocycling except for the use of Panavia Fluoro Cement at 20,000 thermocycles. When the alumina-reinforced ceramic material was treated with any silane coupling agent except GC Ceramic Primer and cemented with Linkmax HV, no significant differences in bond strength were noted between after water storage and after 20,000 thermocycles. After 20,000 thermocycles, all specimens except for the combined use of Clearfil Porcelain Bond or GC Ceramic Primer and Linkmax HV and GC Ceramic Primer and Panavia Fluoro Cement showed adhesive failures at the ceramic-resin luting cement interface.     

不同树脂水门汀和瓷表面处理对玻璃陶瓷粘结强度的影响

目的：评价4种不同的树脂水门汀以及2种不同的瓷表面处理方法对玻璃陶瓷粘结强度的影响。方法：选用IPse．Max Press热压铸瓷制作直径分别为5mm和4mm，高2mm的圆柱形瓷片。经打磨抛光后分为喇大组：（1）4％氢氟酸酸蚀40sec，（2）4％氢氟酸酸蚀40sec＋硅烷化处理1min。各组内分别选用VariolinkII，Multflink Sprint，RelyX Unicem，BisCem将大小瓷片成对粘固。再分别经37℃水储24h，以及水储后冷热循环5000次测定剪切强度，并用电镜观察瓷片表面形态。结果：硅烷化处理能明显提高粘结强度。经HF＋硅烷处理后Multflink Sprint（31．7±4．5MPa），BisCem（29．2±4．4MPa）和RelyX Unicem（28．1±5．5MPa）3组显示出较VafiolinkII（21．8±4．2MPa）高的粘结强度。冷热循环后除硅烷处理且用VariolinkII和RelyX Unicem粘固的实验组外，其余各组粘结强度均显著下降。结论：4种树脂水门汀与经HF和硅烷联合处理的玻璃陶瓷问能达到理想的粘结强度。     

Effects of two silane coupling agents, a bonding agent, and thermal cycling on the bond strength of a CAD/CAM composite material cemented with two resin luting agents

STATEMENT OF PROBLEM: Surface treatment of CAD/CAM-generated composite material is important for a strong bond of resin luting agents to composite material. Purpose. This study evaluated the shear bond strengths of 2 dual-cured resin luting agents to a CAD/CAM composite material and the effect of silane coupling agent and bonding resin on the bond strength. MATERIAL AND METHODS: Rectangular- and disk-shaped CAD/CAM composite materials were untreated or treated with 1 of the 2 silane coupling agents or bonding resin and then cemented together with 1 of the 2 dual-cured resin luting agents. Half of the specimens were stored in water at 37 degrees C for 24 hours, the other half thermocycled 50,000 times before shear bond strength testing. Shear bond strengths were measured with a servohydraulic mechanical testing machine, and results were analyzed with 2-way analysis of variance. RESULTS: Surface treatment by silane coupling agent improved the shear bond strength when compared with nontreatment. Specimens treated with bonding resin showed significantly greater shear bond strength than the untreated groups. However, all specimens had the same adhesive failures at the composite-luting agent interface as untreated groups. When the CAD/CAM composite material was treated with 1 of the 2 silane coupling agents, no significant differences in bond strength were noted between water storage alone and after 50,000 thermocycles. For the 2 groups treated with bonding resin or silane coupling agent and cemented with 1 of the 2 dual-cured resin luting agents, there were significant increases in bond strength after 50,000 thermocycles, compared with specimens that were not subjected to thermal cycling. On the other hand, for the 2 untreated groups, there were significant decreases in bond strength after thermocycling. After 50,000 thermocycles, all specimens treated with silane coupling agent and then cemented with 1 of the 2 resin luting agents showed cohesive failures within the composite material. CONCLUSION: The application of a silane coupling agent to the CAD/CAM composite surface provided the highest bond strength between the resin luting agent and composite after long-term thermal cycling.     

长链硅烷偶联剂对瓷和树脂粘接强度影响的实验研究

目的：比较不同浓度、不同溶剂长链硅烷偶联剂对瓷和树脂粘接强度的影响。方法：将6种自制长链硅烷偶联剂与2种商品偶联剂处理铸瓷表面,然后采用2种树脂水门汀粘接瓷试件。对粘接试件进行即刻和老化剪切强度测试。结果：长链硅烷偶联剂能显著提高瓷和树脂的粘接强度,其中即刻粘接强度与商品偶联剂效果无显著差异（P〉0．05）;2％、4％长链硅烷乙醇溶液处理组的老化剪切强度显著高于商品偶联剂（P〈0．05）。结论：长链硅烷偶联剂的粘接耐久性优于短链商品偶联剂,其2％乙醇溶液适用于铸瓷修复体表面处理。     

玻璃渗透氧化铝陶瓷树脂粘接耐久性的研究

目的分析含有不同类型酸性树脂单体的硅烷偶联剂及不同类型树脂粘接剂的相互组合对玻璃渗透氧化铝陶瓷树脂粘接耐久性的影响。方法使用3种硅烷偶联剂处理玻璃渗透氧化铝陶瓷的表面,使用2种双重固化树脂粘接剂与之粘接。测量试件在0和30 000次冷热循环后的粘接强度。结果冷热循环前,粘接剂A与未硅烷化处理陶瓷间的粘接强度显著低于其他硅烷化处理组,粘接剂A、B与偶联剂B处理的陶瓷间的粘接强度显著低于其与偶联剂A和C的粘接强度。冷热循环30 000次后,粘接剂A与未硅烷化处理陶瓷组的试件全部脱落;而其他硅烷化处理陶瓷组中,只有偶联剂A处理的陶瓷表面与粘接剂A和B间的粘接强度达到了5 MPa以上。结论使用10-甲基丙烯酰氧癸基磷酸酯作为硅烷水解剂的硅烷偶联剂处理的玻璃渗透氧化铝陶瓷能够与不同类型的树脂粘接剂获得较好的粘接耐久性。     

3类修复体经3种瓷表面处理后与陶瓷托槽的粘结强度及去托槽后的瓷表面情况

目的研究3种瓷表面处理方法对3类修复体与陶瓷托槽粘结强度的影响以及去除托槽后瓷表面的情况。方法钴铬烤瓷、e-max铸瓷、二氧化锆全瓷3类修复体试件各36个,每类试件随机分为4组。除对照组为6个试件,其余各组每组10个试件。对照组不作任何处理。喷砂组,氧化铝喷砂4 s,冲洗、吹干后表面涂布硅烷偶联剂。磷酸组,质量分数37%磷酸酸蚀1 min,冲洗、吹干后表面涂布硅烷偶联剂。氢氟酸组,氢氟酸酸蚀2 min,冲洗、吹干后表面涂布硅烷偶联剂。使用光固化托槽粘结剂粘结陶瓷托槽。经37℃恒温水浴24 h后检测抗剪强度。观察托槽去除后瓷表面粘结剂残留情况和瓷面破损情况。结果 3种表面处理方法均能达到或超过有效粘结强度。采用喷砂并涂布硅烷偶联剂方法和氢氟酸酸蚀并涂布硅烷偶联剂方法,钴铬烤瓷试件的抗剪强度与e-max铸瓷和二氧化锆全瓷试件比较差异有统计学意义(P<0.05);磷酸酸蚀并涂布硅烷偶联剂方法中,3类修复体的抗剪强度差异无统计学意义(P>0.05)。3类修复体在使用氢氟酸并硅烷偶联剂处理后,抗剪强度较其他2种方法高,差异有统计学意义(P<0.05)。磷酸组的3类修复体瓷表面粘结剂残留指数得分最低,粘接剂残留最少,且瓷表面破坏最小。结论喷砂、磷酸酸蚀、氢氟酸酸蚀合并使用硅烷偶联剂处理钴铬烤瓷、e-max铸瓷、二氧化锆全瓷修复体,均能得到满意的粘结强度,而磷酸结合硅烷偶联剂方法去除托槽后对修复体表面的影响最小。     

硅涂层对牙科氧化铝陶瓷与树脂粘结强度的影响

目的 探讨在牙科氧化铝陶瓷表面进行SiO2水溶胶涂层对陶瓷与树脂粘结强度的影响.方法 32个氧化铝陶瓷试件根据计算机产生的伪随机数字表分为4组,每组8个,采用溶胶-凝胶法在试件表面分别进行20%SiO2水溶胶涂层+硅烷偶联剂(A组)、30%SiO2水溶胶涂层+硅烷偶联剂(B组)、40%溶胶涂层+硅烷偶联剂(C组)和硅烷偶联剂(对照组)处理,应用傅立叶红外光谱、扫描电镜、X射线能谱仪进行分析.制作陶瓷-复合树脂粘结体,剪切法测试各组剪切粘结强度.结果 溶胶-凝胶法可在氧化铝陶瓷试件表面制得纳米硅涂层.热处理后A、B、C 3组试件Si-O-Si反对称伸缩振动吸收峰、对称伸缩振动吸收峰、弯曲振动吸收峰均增强;扫描电镜显示纳米氧化硅粒子分布较均匀,局部粒子产生团聚;试件表面硅元素含量均明显增加.A、B、C组试件与树脂的剪切粘结强度分别为(3.196±0.171)Mpa、(4.852±0.178)Mpa、(3.576±0.671)Mpa,与对照组[(1.881±0.156)Mpa]相比,差异均有统计学意义(P＜0.05);B组的剪切粘结强度与A、C组相比,差异有统计学意义(P＜0.05).结论 3种浓度硅溶胶可在牙科氧化铝陶瓷表面制得纳米硅涂层.纳米硅涂层可显著提高氧化铝陶瓷与树脂的剪切粘结强度.其中30%浓度SiO2水溶胶制备的硅涂层提高剪切粘结强度的效果最明显.     

Long-term resin bond to densely sintered aluminum oxide ceramic

Background: Densely sintered aluminium oxide ceramic is a popular material for ceramic copings and all‐ceramic restorations. A strong, predictable, and long‐term durable resin bond is key for long‐term clinical success of bonded alumina‐based restorations. Purpose: The purpose of this study was to measure and compare in vitro shear bond strengths of three resin cements with and without their corresponding silane coupling/bonding agent to air particle‐abraded densely sintered aluminum oxide ceramic after long‐term water storage and thermocycling. Materials and Methods: Composite resin cylinders were bonded to air particle‐abraded samples of densely sintered aluminum oxide ceramic with Noribond DC® (Noritake Dental Supply, Inc., Aichi, Japan), Panavia 21® EX (Kuraray, Osaka, Japan), and Variolink II® (Ivoclar Vivadent, Schaan, Liechtenstein), which were used with and without their corresponding silane coupling and bonding agents (n= 15). All specimens (N= 90) were stored for 180 days in water and subjected to repeated thermocycling for a total of 12,000 cycles before shear bond strength was tested. Data were analyzed with the Kruskal‐Wallis test and the Wilcoxon two‐sample rank sum test at the 5% level of significance. Results: Most groups had no or only minimal bond strength to densely sintered alumina after simulated aging. Panavia had the highest bond strength without silane/bonding agent application. Noribond with its silane/bonding agent revealed the highest overall bond strength, which was significantly greater than that of either Variolink or Panavia after silanization. Conclusions: Resin cements revealed significantly different bond strengths, and the use of silane coupling and bonding agents had various effects on the resin bond to pure densely sintered alumina. CLINICAL SIGNIFICANCE Selection of the proper cement/bonding system is fundamental to clinical long‐term success of bonded alumina‐based restorations. Noribond with its bonding agent and ceramic primer seem to fulfill these requirements under clinically relevant testing conditions.     

硅烷化过程中不同加热温度对瓷和树脂粘接强度的影响

目的比较硅烷化过程中不同加热温度对瓷和树脂粘接强度的影响。方法选用2种不同类型硅烷偶联剂处理瓷表面,分别在20℃,40℃,60℃,80℃,100℃条件下干燥5m in。将经过表面处理的瓷试件与树脂粘接并测试剪切强度。结果20℃～60℃范围内,随加热温度的提高,瓷和树脂粘接强度上升;60℃～100℃范围内,随加热温度的提高,粘接强度下降。结论将硅烷化过程中加热温度提高至60℃左右时,硅烷偶联剂能够在瓷和树脂之间产生最佳粘接强度。