光照强度对牙本质湿粘接微拉伸强度的影响

目的：探讨光照强度对牙本质湿粘接微拉伸强度的影响。方法：用WDW-100型电子万能试验机测试和比较粘接剂在不同强度光照后的微拉伸强度。结果：采用300mW/cm^2的光照强度。所得的微拉伸强度明显高于采用500mW/cm^2和800mW/cm^2固化的微拉伸强度;采用500mW/cm^2固化的微拉伸强度又明显高于采用800mW/cm^2固化的微拉伸强度。结论：较弱的光照强度能提高光固化树脂与牙本质之间的湿粘接微拉伸强度,提示采用较弱的光照强度对提高复合树脂与牙本质间的结合有积极作用。     

脱敏剂和酸蚀处理对牙本质粘接强度的影响

目的研究牙体预备后脱敏剂的使用及酸蚀处理对牙本质粘接界面粘接强度的影响,拟为脱敏剂的临床应用提供实验依据。方法将90颗完整的离体磨牙,切割暴露牙本质,用500目的碳化硅水磨砂纸打磨以创建均一的玷污层。按不同脱敏剂类型随机分为All-bond2组(A)、Systemp组(S)和对照组(C),其中每组按酸蚀时机不同再分为前酸蚀组(2)、常规酸蚀组(1)及不酸蚀组(0),共9个小组。各组根据脱敏剂类型的不同及是否酸蚀、酸蚀时机的不同,先后制作暂时修复体和永久修复体。垂直粘接界面切割牙体,每牙制备出1个1.1mm×1.1mm×8mm的直条形试件。用MTS万能测试机检测粘接强度。结果微拉伸测试中各实验小组的粘接强度(单位:MPa)分别为A-2(32.45±12.15)、A-1(27.36±10.23)、A-0(19.30±11.08)、S-2(31.03±13.47)、S-1(31.58±12.84)、S-0(14.93±10.66)、C-2(25.64±14.81)、C-1(27.47±14.37)、C-0(20.33±13.41)。两种脱敏剂组分别和对照组粘接强度比较,差异均无统计学意义(P>0.05)。不酸蚀组的粘接强度最小,与前酸蚀、常规酸蚀组比较,差异均有统计学意义(P<0.05);前酸蚀组与常规酸蚀组相比较,差异无统计学意义(P>0.05)。结论脱敏剂不会影响最终修复体的粘接强度;脱敏剂处理前是否酸蚀牙本质,不影响最终牙本质粘接强度。     

三种粘接剂粘接不同牙本质的微拉伸粘接强度比较

目的采用微拉伸粘接强度实验测定3种牙本质粘接剂粘接楔状缺损处硬化牙本质的粘接强度。方法选择有典型楔状缺损并因牙周病拔除的上颌前磨牙30颗作为实验组，正常上颌前磨牙30颗作为对照组，使用粘接剂A（全酸蚀粘接剂Scotchbond Multi—Purpose）、B（一步法自酸蚀粘接剂Adper Prompt L-Pop）和C（两步法自酸蚀粘接剂Contax）处理硬化牙本质和正常牙本质表面，相应树脂修复。测试两组试件的微拉伸粘接强度。结果粘接剂A、B、C粘接硬化牙本质的微拉伸粘接强度分别为46．805MPa、39．045MPa、29．852MPa。粘接剂A和C与硬化牙本质的微拉伸粘接强度低于正常牙本质，而粘接剂B与之相反，差异有统计学意义（P〈0．05）。结论牙颈部楔状缺损处硬化牙本质由于结构上的特殊性可造成粘接困难。酸性强有利于粘接剂与硬化牙本质的粘接。     

两种脱敏剂对牙本质粘接剂粘接强度的影响

目的 探讨两种脱敏剂对牙本质粘接剂粘接强度和微观形态的影响,以期对临床治疗有所指导.方法 将30颗完整且无龋的人第三磨牙去除(牙合)面釉质,采用随机数字表法随机分为3组:C组(对照组)、U组(UltraEZTM处理)和M组(MI Paste处理);每组10颗牙齿.C组不做处理,U组和M组分别使用相应脱敏剂对暴露的牙本质表面进行处理.3组样本牙再各随机分为两个小组,每小组5颗牙,分别用粘接剂A(Single Bond 2)和B(Xeno Ⅲ)粘接,用复合树脂修复达4～5 mm.用慢速锯将牙齿切成粘接面积为0.9 mm×0.9 mm的长方体试件,用微拉伸测试仪测试微拉伸强度,作为粘接强度,对其进行单因素方差分析.每组随机挑选3个试件对粘接界面进行扫描电镜观察.结果 对于粘接剂A,U组粘接强度[(14.58±2.31)MPa]与C组[(15.82±2.18)MPa]的差异无统计学意义(P>0.05),而M组粘接强度[(9.90±0.79)MPa]降低.对于粘接剂B,U组粘接强度[(10.55±1.06)MPa]与C组[(10.73±1.07)MPa]的差异无统计学意义(P>0.05),而M组粘接强度[(8.74±0.87)MPa]降低.扫描电镜见各组混合层均较致密,M组两种粘接剂的树脂突较短且稀少.结论 两种脱敏剂对粘接剂粘接强度的影响不同,U组脱敏剂对全酸蚀和自酸蚀粘接剂的粘接强度无明显影响,而M组脱敏剂可降低两种粘接剂的粘接强度.     

诺丽对冠部牙本质粘接强度及纳米渗漏的影响

目的 探讨诺丽（Morinda citrifolia juice,MCJ）联合乙二胺四乙酸盐（ethylene diaminete traacetic acid,EDTA）根管冲洗对冠部牙本质粘接强度及纳米渗漏的影响,并与临床上最常用的根管冲洗液次氯酸钠（sodium hypochlorite,NaClO）相比较,为临床应用提供参考。方法 本研究已通过单位伦理审查委员会批准。选取63颗因正畸拔除的人前磨牙,去除表面釉质暴露牙本质平面后,根据冲洗液不同随机分为对照组（蒸馏水组）和6个实验组,即：A组2.5%NaClO、B组5.25%NaClO、C组6%MCJ、D组2.5%NaClO-17%EDTA、E组5.25%NaClO-17%EDTA和F组6%MCJ-17%EDTA(n=9),分别用相应冲洗液浸泡20 min后,在其表面分层堆积4 mm×4 mm×3 mm的Z350树脂块,每组选取6个样本,低速切割机将每个样本切割成1 mm×1 mm×8 mm的试件条,进行微拉伸粘接强度测试,随后在体视显微镜下观察断裂类型;每组剩余的3个样本经老化后切割成1 mm厚的薄片,进行界面纳米渗漏测试以及扫...     

陶瓷托槽Crystaline Ⅳ剪切及拉伸粘接强度的研究

目的研究临床常用的多晶体氧化铝陶瓷托槽CrystalineⅣ（Tomy,Japan）剪切及拉伸粘接强度。方法 15颗离体上颌双尖牙用于剪切粘接实验,15颗离体下颌双尖牙用于拉伸粘接实验。使用37%液体磷酸和京津釉质粘接剂粘接CrystalineⅣ,在0.9%生理盐水中室温保存24小时。电子万能试验机检测剪切及拉伸粘接强度。托槽脱落后记录粘接剂残留指数（ARI,adhesive remnant index）,陶瓷托槽的折断数目和釉质表面出现肉眼可见缺损的牙齿数目。结果 Crystaline IV的剪切和拉伸粘接强度分别为14.47±2.43MPa和6.53±2.26MPa,剪切粘接强度显著高于拉伸粘接强度。两种加载方式的主要去除部位均在粘接剂内,所有样本未出现陶瓷托槽折断和肉眼可见的釉质缺损。结论使用京津釉质粘接剂粘接CrystalineⅣ能够获得满足临床治疗需要的剪切及拉伸粘接强度,剪切粘接强度显著高于拉伸粘接强度。加载拉伸力可能是相对安全的去除陶瓷托槽的方法。     

牙本质的表面状态对黏接剂粘接强度的影响

目的研究3种不同的表面状态对两种牙本质黏接剂的粘接强度的影响。方法选用两种牙本质粘接系统SingleBond(SB)和Prime&BondNT(PB),分别应用于干燥、湿润和过湿的离体的人牙本质表面,用Z-100树脂恢复牙冠至4mm。用低速锯片切牙齿,精细金刚砂车针修成沙漏状的粘接面积约0.8mm2的样本,测试各个样本的微拉伸粘接强度。结果两种黏接剂在湿润状态下的粘接强度均高于干燥组和过湿组(P<0.05),干燥组与过湿组的差异无显著性。在3种表面状态下,SB的粘接强度均高于PB组(P<0.05)。结论在使用全酸蚀单瓶粘接系统时,牙本质表面必须保持适度的湿润。     

四种粘接系统的微拉伸粘接强度

目的 评价四种粘接系统的微拉伸粘接强度（SingleBond;Bond-1;Prime＆Bond　NT;One-Step）。方法 新鲜拔除的无龋坏人磨牙（拔除1个月以内,贮存于37℃生理盐水中）,高速涡轮机金钢砂车针在喷水降温下磨切咬合面,暴露牙本质。分别用四种粘接剂按使用说明进行粘接处理。牙齿贮存于37℃生理盐水24h后,制备成沙漏状试件。粘接界面面积控制在1mm2左右。测试其拉伸强度,并作统计学处理。结果 四种粘接系统的微拉伸强度分别为:（25.80±2.41）MPa（SingleBond）;（29.92±3.04）MPa（Bond-1）;（28.97±2.73）MPa（Prime＆BondNT）;（30.03±2.96）MPa（One-Step）。结论 微拉伸方法测得的粘接强度明显高于传统较大粘接面积时的测试值。更为客观、真实地反应了各粘接系统的粘接强度。     

四种牙本质粘接系统的微拉伸强度研究

目的　评价四种牙本质粘接系统 (SingleBond ;Bond 1;Prime&BondNT ;One Step)的微拉伸粘接强度。方法　选择新鲜拔除的无龋磨牙 2 0个 ,磨除牙釉质 ,暴露牙本质。分别用四种牙本质粘接系统按使用说明进行粘接处理。牙齿贮存于 3 7℃生理盐水 2 4h后 ,制备成沙漏状试件。粘接界面面积控制在 1mm2 左右。测试其拉伸强度 ,并作统计学处理。结果　四种牙本质粘接系统的微拉伸强度分别为 :2 5 .80± 2 .41Mpa (SingleBond) ;2 9.92± 3 .0 4Mpa (Bond 1) ;2 8.97± 2 .73Mpa (Prime&BondNT) ;3 0 .0 3± 2 .96Mpa (One Step)。结论　微拉伸方法测得的粘接强度明显高于传统较大粘接面积时的测试值。更为客观、真实地反应了各粘接系统的粘接强度     

牙本质表面状态对酒精-水基粘接剂强度和界面影响的微拉伸及LSCM研究

目的 :研究干燥或湿润的牙本质表面状态对酒精 -水基粘接剂粘接强度和粘接界面微观结构的影响 ,并探讨粘接强度和粘接界面微观结构之间的内在联系。方法 :选用两种含有酒精和水的湿粘接系统OptiBondSolo和SingleBond ,将Chrisma树脂分别粘结在干燥或湿润的人牙本质表面 ,测试各组试件的微拉伸强度 ,并在激光扫描共聚焦显微镜下观察和比较各组试件粘接界面超微结构的异同。结果 :湿粘接时粘接剂对牙本质表面的渗透较为充分 ,混合层均匀 ,厚度约为 5 μm ,并可观察到牙本质小管和侧支小管中均有明显的树脂突形成 ;干燥粘结时形成的界面形态与湿粘接时没有明显区别。干燥粘接时 ,两种粘接系统的微拉伸强度均有显著降低 ,下降幅度最高为 2 3 % ,微拉伸破坏的方式主要是粘接界面的破坏。结论 :含有酒精和水的粘接系统在干燥或湿润粘接时粘接界面的超微结构变化不明显 ,其中的水分对干燥的牙本质表面有再湿润效果 ;干燥粘结时微拉伸强度则有明显的降低 ;微拉伸强度的测试可以更客观的反映粘接强度的大小。     

氢氟酸处理对二硅酸锂玻璃陶瓷表面形貌及粗糙度的影响

目的 探讨氢氟酸处理时间对二硅酸锂玻璃陶瓷表面形貌及粗糙度的影响,拟为与之相关的玻璃陶瓷机械强度和树脂粘接强度做出初步解释.方法 采用失蜡铸造法制作直径10 mm、厚1 mm的玻璃陶瓷片状试件15个,打磨抛光之后随机分为5组,每组3个.陶瓷表面分别接受9.5％的氢氟酸凝胶酸蚀处理0、20、40、60和120 s.使用原子力显微镜(AFM)测量表面粗糙度参数和酸蚀深度,观测其表面三维形貌,并结合使用场发射扫描电子显微镜(FE-SEM)对陶瓷表面微观结构进行观察分析.结果 FE-SEM观察显示,陶瓷表面的玻璃基质首先被氢氟酸侵蚀溶解,随着酸蚀时间的延长,玻璃基质进一步被侵蚀,部分晶体结构也从陶瓷表面脱落、消失.AFM测量酸蚀表面得出,对照组、20、40、60和120 s氢氟酸处理组陶瓷片表面粗糙度Ra[分别为(17.2±1.6)、(241.8±23.6)、(290.6±38.2)、(322.6±19.6)和(371.3 ± 43.0) nm]随氢氟酸酸蚀时间的延长而显著增加(P＜0.05),且与酸蚀时间成正相关.结论 氢氟酸处理可显著增加二硅酸锂陶瓷表面粗糙度.结合使用FE-SEM和AFM能够更好地对玻璃陶瓷的酸蚀表面微观形貌结构进行分析评价.     

Carisolv去龋对牙本质粘结界面影响的实验研究

目的:研究Carisolv去龋对牙本质粘结界面的影响。方法:24颗新鲜拔除的中度龋损的第三磨牙,随机分成ABCD4组。每个牙的龋洞分成两半,一半用Carisolv去龋,另一半用涡轮车针去龋后,做如下处理:A组不处理;B组320ml/L磷酸酸蚀,扫描电镜观察牙本质表面形态;C组不酸蚀,DyractAP复合体充填;D组320ml/L磷酸酸蚀后复合树脂充填,扫描电镜观察牙本质-充填体界面。结果:A组:Carisolv去龋后牙本质表面玷污层少,大部分牙本质小管口开放,清晰可见,表面粗糙不平;涡轮车针去龋后牙本质表面覆盖较厚玷污层,牙本质小管口堵塞,很少见到开口。B组:Carisolv去龋组和涡轮车针去龋组均去除了玷污层,牙本质小管口开放,但Carisolv组牙本质小管无管塞,而涡轮车针组牙本质小管残留部分管塞。C组:观察牙本质-复合体界面见Carisolv去龋组有较多树脂突形成,深入牙本质小管及管周;而涡轮车针去龋组未见明显树脂突起形成。D组:观察牙本质-树脂界面见2组树脂突的密度和长度无明显差异,但Carisolv去龋组树脂突之间的侧枝连接较涡轮车针去龋组多见。结论:Carisolv去龋后牙本质表面玷污层少,牙本质小管口开放,表面粗糙不规则,利于粘结,尤其在使用不需酸蚀的复合体充填时优势突出。     

Physicochemical and morphological characterization of a glass ceramic treated with different ceramic primers and post-silanization protocols

ObjectiveEvaluate the effect of different ceramic primers and post-silanization protocols on physicochemical and morphological characteristics of a lithium disilicate glass ceramic.MethodsLithium disilicate ceramic (IPS e-max CAD) plaques (6 × 10 × 2 mm) were divided into 3 groups according to the ceramic primer used: (1) Silane (RelyX Ceramic Primer-RL); (2) Silane + MDP (Clearfil Ceramic Primer Plus-CP); (3) Self-etching ceramic primer (Monobond Etch and Prime-MB). Specimens from each group were distributed into 5 sub-groups according to post-silanization protocols: (a) Treated as recommended by the manufacturer (MR), (b) MR + Additional drying with air at room temperature for 30 s (RTA), (c) MR + additional drying with hot air for 30 s (HT), (d) MR + Surface rinsing with water at room temperature for 10 s and drying with air at room temperature for 30 s (WT), and (e) Specimens were not silanized (NS). Surface free energy (SFE) was determined using static contact angles measurements with water and diiodomethane. SFE data were submitted to Friedman followed by Wilcoxon post-hoc test (α = 0.05). Morphology was analyzed using scanning electron microscopy. Elemental composition and chemical interactions were determined with X-ray photoelectron spectroscopy analysis.ResultsRL presented the highest SFE (62.4 mN/m) followed by CP (59.7 mN/m). Post-silanization protocols resulted in similar SFE, but WT and HT induced the highest water contact angles when using CP and RL. CP modified ceramics’ surface morphology compared to the etched and RL treated groups. The presence of water was identified on CP treated specimen. All analyzed primers formed siloxane bonds with ceramic surface.SignificanceCeramic primers resulted in different surface free energy and morphology, but siloxane bonds were identified for all tested solutions. HT and WT protocols should be used with RL and CP primers. MB was not influenced by the different silanization protocols.     

表面状态对酒精-水基粘接剂粘接界面影响的研究

目的研究以酒精-水为溶剂的牙本质湿粘接荆在干燥或湿润的牙本质表面进行粘结时，各自形成的粘接界面的特点。方法选用两种以酒精一水为溶荆的牙本质湿粘接系统，将Chrisma树脂粘接在干燥或湿润的人牙本质表面，通过透射电镜的观察，分析不同表面状态时酒精基粘结剂形成的粘接界面的特点。结果两种粘接剂都可以充分渗透到牙本质表面和牙本质小管周围脱矿形成的胶原纤维网中，形成树脂突和混合层。干燥粘结或湿粘接时的透射电镜图像没有明显差别。湿粘接时可以在粘接界面中观察到过度湿润的现象，湿粘接时则很少发现。结论以酒精和水为溶刺的粘接系统在干燥或湿润的牙本质表面粘结时都可以形成较为充分的渗透，其中的水分对脱矿干燥的牙本质胶原纤维网具有再湿润作用     

Carisolv去龋对牙本质黏结强度影响的实验研究

目的：研究Carisolv去龋对牙本质黏结强度的影响：方法：选择30颗新鲜拔除的[牙合]面中度龋损的第三磨牙，每个牙的龋洞分成两半，一半用Carisolv去龋，另一半用慢速球钻去龋，而后随机分成3组，分别使用Prime＆Bond NT＋Dyract AP复合体黏结；Uni—Etch（320ml／L磷酸）＋One—Step Plus＋Renew树脂黏结：Prompt—L—Pop＋Z100树脂黏结。测试微抗拉强度（MTBS）：结果：Cafisolv组3种黏结系统MTBS分别为：（17．22±7．95）MPa、（25．40±8．44）MPa、（17．66±8．33）MPa，车针组分别为：（16．01±7．43）MPa、（23.45±7．55）MPa、（16.26±7.97）MPa：2种去龋方法间差异无显著性。结论：Carisolv去龋法对以上3种黏结系统与牙本质的黏结强度无不利影响：     

3种酸蚀、粘接方法粘接托槽后釉质粘接剂界面的超微形态观察

目的研究不同粘接材料、不同酸蚀方法粘接正畸金属托槽后釉质粘接剂界面纵切面的超微形态。方法选择正畸拔除的健康前磨牙72颗,随机分成3组,每组24颗。A组用体积分数37%的磷酸酸蚀30 s,京津釉质粘接剂粘接金属托槽;B组用体积分数37%的磷酸酸蚀30 s,Transbond光固化粘接剂粘接托槽;C组用自酸蚀处理液加压涂抹3 s,Transbond光固化粘接剂粘接托槽。高倍立体显微镜及扫描电镜观察3组牙釉质粘接剂界面纵切面的形态。结果 A组界面紧密而均匀,粘接剂固化后形成的颗粒较大,颗粒之间间隙明显。B组界面紧密均匀,粘接剂固化后的颗粒较小而均匀,颗粒间结合紧密。C组界面疏松不均匀,树脂突少而细,有时可见较明显的裂隙。结论不同酸蚀、粘接方法牙釉质粘接剂界面的结合情况不同,磷酸酸蚀组釉质表面与粘接剂间形成的树脂突较均匀而密合,而自酸蚀组多处存在较大的裂隙,提示酸蚀方法可能是影响微渗漏的主要原因。     

Aspects of bonding between resin luting cements and glass ceramic materials

Objectives

The bonding interface of glass ceramics and resin luting cements plays an important role in the long-term durability of ceramic restorations. The purpose of this systematic review is to discuss the various factors involved with the bond between glass ceramics and resin luting cements.

Methods

An electronic Pubmed, Medline and Embase search was conducted to obtain laboratory studies on resin–ceramic bonding published in English and Chinese between 1972 and 2012.

Results and discussion

Eighty-three articles were included in this review. Various factors that have a possible impact on the bond between glass ceramics and resin cements were discussed, including ceramic type, ceramic crystal structure, resin luting cements, light curing, surface treatments, and laboratory test methodology.

Conclusions

Resin–ceramic bonding has been improved substantially in the past few years. Hydrofluoric acid (HF) etching followed by silanizaiton has become the most widely accepted surface treatment for glass ceramics. However, further studies need to be undertaken to improve surface preparations without HF because of its toxicity. Laboratory test methods are also required to better simulate the actual oral environment for more clinically compatible testing.     

Effect of etching time and resin bond on the flexural strength of IPS e.max Press glass ceramic

ObjectiveTo evaluate the effect of hydrofluoric acid (HFA) etching time and resin cement bond on the flexural strength of IPS e.max^® Press glass ceramic.MethodsTwo hundred and ten bars, 25 mm × 3 mm × 2 mm, were made from IPS e.max^® Press ingots through lost-wax, hot-pressed ceramic fabrication technology and randomly divided into five groups with forty-two per group after polishing. The ceramic surfaces of different groups were etched by 9.5% hydrofluoric acid gel for 0, 20, 40, 60 and 120 s respectively. Two specimens of each group were selected randomly to examine the surface roughness and 3-dimensional topography with atomic force microscope (AFM), and microstructure was analyzed by the field emission scanning electron microscope (FE-SEM). Then each group were subdivided into two subgroups (n = 20). One subgroup of this material was selected to receive a thin (approximately 0.1 mm) layer of resin luting agent (Variolink N) whereas the other subgroup remained unaltered. Half of subgroup's specimens were thermocycled 10,000 times before a 3-point bending test in order to determine the flexural strength. Interface between resin cement and ceramic was examined with field emission scanning electronic microscope.ResultsRoughness values increased with increasing etching time. The mean flexural strength values of group 0 s, 20 s, 40 s, 60 s and 120 s were 384 ± 33, 347 ± 43, 330 ± 53, 327 ± 67 and 317 ± 41 MPa respectively. Increasing HF etching times reduced the mean flexural strength (p < 0.05). However, the mean flexural strength of each group, except group 0 s, increased significantly to 420 ± 31, 435 ± 50, 400 ± 39 and 412 ± 58 MPa after the application of dual-curing resin cement. In the present investigation, no significant differences after thermocycling on the flexural strengths were evident.SignificanceOvertime HF etching could have a wakening effect on IPS e.max^® Press glass ceramic, but resin cement bonding to appropriately etched surface would strengthen the dental ceramic.     

Influence of ceramic-coating techniques on composite-zirconia bonding: Strain energy release rate evaluation

ObjectivesTo compare ceramic-coating techniques versus conventional techniques on bonding between composite cements and zirconia by means of strain energy release rate (G_c, J/m²).MethodsTwo sizes of zirconia bars (30 mm × 8 mm × 1.5 mm and 14.8 mm × 8 mm × 1.5 mm) were fabricated. Two smaller bars were treated and cemented to the surface of a large bar using one of the following methods: (i) AlN-nano-structured alumina coating with RelyX Unicem 2; (ii) HOT-DCM hotbond coating with G-Multi Primer and G-Cem Linkforce; (iii) LiDi-lithium disilicate glass-ceramic coating with Monobond N Primer and Multilink Speed; (iv) COJ-tribochemical silica treatment with RelyX Ceramic Primer and RelyX Unicem 2; (v) GCEM-alumina grit blasting with G-Multi Primer and G-Cem LinkForce; (vi) MUL-alumina grit blasting with Multilink Speed; and (vii) PAN-alumina grit blasting with Clearfil Ceramic Primer and Panavia F2.0. A total of 30 bilayered specimens in each group were stored in distilled water at 37 °C for 24 h and assigned to three subgroups (n = 10/test group): short-term test, thermocycling for 5000 cycles, and thermocycling for 10,000 cycles and tested in 4-point bending configuration. Results were analysed using two-way ANOVA, followed by one-way ANOVA and Games-Howell (α = 0.05). Failure mode and surfaces were analysed using optical microscopy and SEM.ResultsThe bonding (J/m²) of COJ and MUL groups was significantly higher than the other groups among all aging conditions. Thermocycling affected the bonding in COJ and GCEM groups.SignificanceSurface pre-treatments and artificial aging affect the bonding between composite cements and zirconia.     

粘结剂使用方式对全酸蚀树脂水门汀与牙本质粘结性能影响的研究

目的评价粘结剂的3种不同使用方式（不使用粘结剂,粘结剂不固化及粘结剂固化10 s）对全酸蚀树脂水门汀与牙本质间粘结性能的影响。方法新鲜拔除的无龋人第三磨牙45颗,随机分为9组（n=5）,流水降温下磨除冠部牙釉质,制备标准牙本质粘结面,酸蚀冲洗后表面按全酸蚀粘结技术处理,牙本质粘结剂处理方式按设计进行,然后与3种全酸蚀树脂水门汀（Rely X ARC、Calibra、VariolinkⅡ）粘结并测试微拉伸粘结强度,用扫描电镜观察粘结界面。结果对于3种全酸蚀树脂水门汀,不使用粘结剂组未测得粘结强度;粘结剂不固化组及粘结剂固化10 s组均获得较为满意的粘结强度,不固化组的微拉伸粘结强度（15.534±2.099;22.827±6.968;10.736±3.199）显著高于粘结剂固化10 s组（13.476±2.710;14.076±5.165;7.736±3.052）（P〈0.05）。结论①全酸蚀树脂水门汀应结合粘结剂同时使用。②牙本质涂布粘结剂后不单独固化可显著提高全酸蚀树脂水门汀与牙本质的粘结强度。