改良第八代粘接剂对龋影响牙本质粘接性能的影响

目的:第八代粘接剂Single Bond Universal(SBU)是最新一代的粘接剂,表没食子儿茶素没食子酸酯(Epigallocatechin gallate, EGCG)是基质金属蛋白酶抑制剂及偶联剂,本研究探讨添加EGCG是否可以提高SBU粘接强度及降低微渗漏。方法:将人中龋离体牙去除冠部釉质,龋指示剂下制备龋影响牙本质。将离体牙随机分组(对照组,EGCG 100μg/ml组,EGCG 200μg/ml组,EGCG 300μg/ml组),使用SBU进行粘接,上方堆砌树脂,在流动水下,使用慢速线性切割机进行切割,制备微拉伸试件及微渗漏试件。微拉伸仪检测粘接强度,场发射扫描电镜观察断裂后界面显微结构,激光共聚焦显微镜检测试件微渗漏。结果:添加EGCG能明显提高SBU对龋影响牙本质的粘接强度(P<0.0001, F=17.11),微渗漏显著减少。结论:EGCG能改良SBU对龋影响牙本质的粘接性能。     

羟磷灰石牙本质脱敏剂对温和型通用型粘接系统粘接性能研究

目的 本研究旨在评估含羟磷灰石（HA）脱敏剂封闭牙本质小管的效果及其对温和型通用型粘接剂粘接性能的影响。 方法 收集完整的第三磨牙,制备冠中部牙本质样本,建立牙本质敏感模型。根据不同的脱敏处理方式随机分为4组,分别进行下述处理：无脱敏处理（对照组）、Biorepair牙膏处理（含HA脱敏牙膏）、Dontodent牙膏处理（含HA脱敏牙膏）和HA糊剂处理。通过扫描电镜（SEM）观察牙本质小管封闭情况,并评估牙本质小管封闭率。分别使用All-Bond Universal、Single Bond Universal和Clearfil Universal Bond以自酸蚀模式应用于脱敏处理后的牙本质。通过接触角测量评估脱敏处理后牙本质表面的润湿性和表面能（SFE）。制备树脂-牙本质粘接试样,测试微拉伸粘接强度,分析脱敏处理方式对于3种通用型粘接剂的牙本质微拉伸粘接强度的影响。 结果 SEM显示含HA脱敏牙膏和HA脱敏剂处理后牙本质小管均明显封闭,封闭率HA组>Biorepair组>Dontodent组（P<0.05）。接触角分析表明,含HA脱敏剂对通用型粘接剂的润湿性无显著影响（P>0.05）,但脱敏处理后牙本质SFE显著增加（P<0.05）。微拉伸粘接强度测试表明,含HA脱敏牙膏会降低微拉伸粘接强度（P<0.05）,而HA组与对照组的微拉伸粘接强度之间差异无统计学意义（P>0.05）。 结论 含HA脱敏牙膏能够形成牙本质小管封闭。在使用温和型通用型粘接剂进行后续树脂修复时,含HA脱敏牙膏降低牙本质粘接强度,而HA糊剂的脱敏处理未对粘接性能产生不利影响。     

Nd:YAG激光增加非龋性硬化牙本质全酸蚀粘接强度的实验研究

目的 通过微拉伸粘接强度实验,探讨激光对全酸蚀粘接剂处理后的非龋性硬化牙本质与复合树脂粘接强度的影响.方法 选择牙本质视觉分级为3级以上的(牙合)面磨损后牙10颗,每颗牙以低速锯垂直于牙本质表面,将硬化牙本质分为面积相等的两部分(约12 mm2),按随机数字表法将这两部分分为实验组和对照组,实验组经Nd∶YAG激光(1 W,10 Hz)处理后,使用Scotchbond (STB)酸蚀、涂布粘接剂Adper Single bond 2(ASB)联合Z350复合树脂充填,对照组使用STB酸蚀、涂布粘接剂ASB联合Z350复合树脂充填.置于37 ℃生理盐水中24 h后,制作微拉伸试件并测试微拉伸粘接强度,体视显微镜下观察断裂模式并分类.采用SPSS13.0软件对微拉伸粘接强度值做t检验.结果 实验组粘接强度[(26.11±1. 62)Mpa]显著高于对照组[(22.27±2.16)Mpa],差异有统计学意义(P=0.006).体视显微镜下可见断裂多发生于牙本质-树脂粘接面.结论 Nd∶YAG激光能够提高硬化牙本质与全酸蚀粘接系统的粘接强度.     

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。     

超声处理对牙本质玷污层性状及粘接强度的影响

目的 探究超声处理对牙本质表面玷污层性状及其对通用型树脂粘接剂自酸蚀模式下粘接强度的影响。方法 将40颗人无龋下颌第三磨牙随机分为320目碳化硅砂纸打磨组以及砂纸打磨加超声处理组,运用扫描电子显微镜观察牙本质表面玷污层性状;处理后的牙体分别用Rhodamine B染色的2种通用型树脂粘接剂(Clearfil Universal Bond和All-Bond Universal, pH值分别为2.3和3.1)粘接复合树脂,观察粘接界面的渗透情况;最后制作微拉伸试件进行微拉伸强度测试。结果 扫描电子显微镜显示,超声处理能够使大量牙本质小管暴露;激光扫描共聚焦显微镜显示超声处理过后2种粘接剂都能沿牙本质小管渗透入牙本质深部;微拉伸强度测试结果表明超声处理能够增强2种通用型树脂粘接剂自酸蚀模式下的粘接强度;但在相同的牙本质表面处理条件下,这两种粘接剂间的粘接强度差异无统计学意义。结论 超声处理能够部分去除牙本质表面玷污层,暴露牙本质小管,增加通用型树脂粘接剂自酸蚀模式下的粘接强度。     

人工唾液条件下3种自酸蚀粘接剂与牙本质粘接耐久性研究

目的　探讨Single bond™ Universal等3种不同类型自酸蚀粘接剂与牙本质的粘接强度和耐久性。方法　选取 2016年5—7月解放军总医院口腔颌面外科拔除的24颗新鲜人离体第三磨牙,随机分为3组,每组8颗,分别选用Clearfil SE Bond（SE组）、G-Bond plus（GBp组）、Single bond™ Universal（SBU组）等3种自酸蚀粘接剂与新鲜牙本质粘接并制备试件。每组挑选出完整试件160个,再分为两个亚组（各80个试件）,分别在即刻与人工唾液浸泡6个月后行微拉伸粘接强度实验,体视显微镜下观察试件断裂类型。 结果　SE组、GBp组、SBU组即刻牙本质粘接强度分别为（55.70 ± 11.07）、（52.85 ± 7.54）和（62.82 ± 8.70）MPa,其中SBU组高于SE组和GBp组,差异有统计学意义（P < 0.05）。人工唾液保存6个月后,SE组、GBp组、SBU组牙本质粘接强度分别为（13.51 ± 4.99）、（43.53 ± 6.82）和（49.13 ± 6.58）MPa,3组之间差异均有统计学意义（P < 0.05）。6个月时粘接界面观察,SE组断裂模式均为粘接界面断裂;GBp组16个试件为牙本质内聚断裂,4个试件为复合树脂内聚断裂;SBU组28个试件为牙本质内聚断裂,8个试件为复合树脂内聚断裂。 结论　Single bond™ Universal即刻牙本质粘接强度和人工唾液老化后6个月粘接强度均显著高于Clearfil SE Bond、G-Bond plus;Single bond™ Universal粘接强度大,稳定耐久,可提供良好的粘接效果。     

丙酮基和酒精-水基牙本质粘接系统粘接强度比较及粘接界面观察

目的:比较丙酮基和酒精-水基两种不同溶剂类型的全酸蚀牙本质粘接系统粘接强度和粘接界面的微观形态。方法:选择24颗正畸治疗拔除的健康前磨牙,去除合面釉质层,随机分两组,每组选用一种 “两步法”全酸蚀牙本质粘接系统:以丙酮为溶剂的Prime & Bond NT(PB组)和以酒精和水为溶剂的Single Bond 2(SB2)组,粘接后进行微拉伸力检测。以扫描电镜(SEM)和激光共聚焦扫描电镜(LCSM)观察两种牙本质粘接系统的粘接界面。结果:粘接强度PB组(29.49±4.01) MPa,SB2组微拉伸粘接强度为,SB2组为(30.03±4.33) MPa,无统计学差异。两种牙本质粘接系统均可充分渗入脱矿牙本质表层的胶原纤维网和牙本质小管内,形成混合层和树脂突,SB组混合层薄而均匀,树脂突长。结论:不同溶剂类型的两组牙本质粘接系统微拉伸粘接强度无差异,全酸蚀牙本质粘接系统在湿粘接状态下可以对牙本质形成良好的渗透。     

牙本质粘接剂粘接强度与界面形态的研究

目的:采用一种新的界面处理方法,对不同类型牙本质粘接剂的粘接强度与界面形态进行研究.方法:选取人无龋磨牙,暴露咬合面牙本质,分别使用3 种粘接剂(Single Bond,SB;Clearfil SE Bond,SE;Clearfil S3 Bond,S3)制备粘接样本.粘接样本切割成粘接界面约为0.9 mm×0.9 mm的柱形小条,用微拉伸测力仪测试粘接强度(n=15).另外将粘接样本依次用6 mol/L盐酸、5%次氯酸钠和0.08 mg/ml透明质酸酶溶液处理,扫描电镜观察粘接界面形态.结果: 3 种粘接剂的牙本质粘接强度分别为:SB (35.50±6.40) MPa,SE (45.06±5.29) MPa,S3 (30.46±3.82) MPa,三者之间差异具有统计学意义(P<0.05).SB粘接界面的树脂突长约9～12 μm,部分样本出现混合层易与粘接剂层分离.SE形成的树脂突长约9～14 μm,无混合层与粘接剂层分离现象.使用S3后,树脂突稀疏,长约4～7 μm,混合层与粘接剂层结合紧密.结论:牙本质粘接剂的粘接界面形态与粘接强度存在一定的相关性.     

2种自制牙本质粘接剂的微拉伸粘接强度和耐久性能的实验研究

目的 测试自行研制的自酸蚀及全酸蚀粘接剂的微拉伸粘接强度和耐久性能,并与市售的进口同类产品进行对比.方法 选用正畸拔除前磨牙60颗,随机分成4组,每组分循环前、后各2个亚组,各15个试件,分别为自制的自酸蚀粘接剂(44组)和全酸蚀粘接剂(45组),Easy one(EO组)和Single Bond2(SB组).测试各组冷热循环前后的微拉伸粘接强度变化,并进行统计分析,体视显微镜观察断裂模式.结果 冷热循环前,各组微拉伸粘接强度从大到小分别为SB组(35.05±3.01)Mpa＞44组(27.76±1.44)Mpa＞ 45组(27.65±1.67)Mpa＞EO组(26.03±2.15)Mpa,45组和SB组之间及44组和EO组之间微拉伸粘接强度的差异有统计学意义(P＜0.05).冷热循环后,各组从大到小为SB组＞44组＞EO组＞45组,45组和SB组之间及44组和EO组之间微拉伸粘接强度的差异有统计学意义(P＜0.05).同一粘接剂冷热循环前后相比,粘接强度均呈下降趋势(P＜0.05);试件的断裂面类型以混合型断裂为主.结论 自制牙本质粘接剂和市售的进口同类产品相比,自酸蚀粘接剂粘接强度高且耐久性能好,全酸蚀粘接剂则与之相反.冷热循环后各组粘接剂的微拉伸粘接强度均有下降.     

封闭牙釉质表面的抗剪粘接强度研究

目的：研究Single bond与牙釉质表面的抗剪粘接强度。方法：30颗离体前磨牙随机均分为3组，牙釉质上分别粘接不同的测试材料，检测各组材料的抗剪粘接强度，并观察断裂发生的部位。结果：断裂均发生在粘接材料与牙釉质之间，Single bond的抗剪粘接强度达13Mpa。与牙釉质粘接前，牙面预涂京津釉质粘接剂涂剂，Single bond的抗剪强度没有出现显著性变化。这两组分分别与京津釉质粘接剂组比较，抗剪强度均有显著性差异。结论：Single bond与牙釉质的抗剪粘接强度满足正畸临床要求，京津釉质粘接剂涂剂不影响Single bond的临床应用。     

Evaluation of the interaction of chlorhexidine and MDP and its effects on the durability of dentin bonding

ObjectiveThis study aimed to evaluate the potential interaction of chlorhexidine (CHX) and 10-methacryloyloxydecyl dihydrogen phosphate (MDP) and its effects on the durability of dentin bonding.MethodsTwo commercial adhesives were tested: a MDP-free adhesive (Single Bond 2, SB2) and a MDP-containing adhesive (Single Bond Universal, SBU). Teeth were randomly assigned to six groups and tested for micro-tensile bond strength (μTBS): Ctr, direct bonding with SB2; CHX, CHX conditioning and SB2; MDP, MDP conditioning and SB2; CHX + MDP, combined CHX and MDP conditioning and SB2; SBU, direct bonding with SBU; CHX + SBU, CHX conditioning and SBU. The potential interaction of CHX and MDP was assessed by measuring nanoleakage, in situ zymography, and chemoanalytic characterization via Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and nuclear magnetic resonance (NMR). Specimens for μTBS and nanoleakage tests were first subjected to water storage for 24 h or 6 months.ResultsThe initial μTBS values of the Ctr and CHX groups were significantly lower than those of the other four groups (P < 0.05). Water storage for 6 months significantly weakened all groups (P < 0.05), with the Ctr group showing the lowest μTBS. This group also showed more obvious nanoleakage than the other five groups. In situ zymography revealed that the Ctr group showed the strongest fluorescence and that the CHX + MDP group showed greater fluorescence than either CHX or MDP group. FTIR, XPS, and NMR indicated that MDP can interact with hydroxyapatite. NMR detected no Ca²⁺ salt peak for MDP when it was combined with CHX.SignificanceThe application of either CHX or MDP alone can improve dentin bond durability. However, CHX may interfere with the formation of MDP–Ca salts.     

简化乙醇湿粘结对龋影响牙本质粘结强度的影响

目的:评估简化乙醇湿粘结技术对龋影响牙本质粘结强度的影响。方法:选取人慢性龋离体第三磨牙36颗去龋备洞后保留龋影响牙本质。随机分为6组,分别使用自制疏水性粘结剂,Prime & Bond NT(PB),Adper Single bond plus(SB)进行粘结,堆砌树脂厚度约4~5 mm。实验组采用简化乙醇湿粘结法,对照组采用传统水湿粘结法。制作1 mm ×1 mm ×8 mm的条形微拉伸强度试件,每组选取8个。采用万能材料试验机测试微拉伸强度并记录,观察断裂界面。结果:在自制疏水性粘结剂组中,实验组粘结强度较对照组有显著提高(P<0.05)。结论:简化乙醇湿粘结技术可以提高CAD界面的粘结强度,尤其是在与疏水性粘结剂联合运用时,有显著提高。     

苯扎氯铵改性粘接剂对牙本质-树脂远期粘接强度的影响研究

目的:评估苯扎氯铵(benzalkonium chloride,BAC)改性粘接剂对牙本质-树脂远期粘接强度的影响。方法:将BAC加入到美国3M第八代全酸蚀树脂粘接剂(single bond universal,SBU)中,制成不同浓度的改性粘接剂。将保存于百里香酚溶液中的100颗第三磨牙随机分为10组(n=10),A、A1组:0.25%BAC;B、B1组:0.5%BAC;C、C1组:1%BAC;D、D1:2%BAC;E、E1:对照组。A、B、C、D、E组试件进行剪切强度实验(SBS)并统计断裂模式。A1、B1、C1、D1、E1组试件进行微拉伸实验(μTBS)并统计断裂模式。结果:在剪切强度和微拉伸强度实验中,处理组的强度表现均显著低于对照组(P<0.05),其结果具有统计学意义。D组与C组结果具有统计学差异(P=0.01).D1组与B1组、C1组比较具有统计学意义(P<0.05)。断裂模式均以混合断裂为主,其次是粘接面断裂,内聚断裂最少。结论:全酸蚀粘接模式下,在树脂粘接剂中添加苯扎氯铵并不能改善牙本质与树脂的远期粘接强度,这可能是由于粘接剂的理化性能受损导致。     

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??Objective??To evaluate the bonding strength and durability of three different self-etching adhesives under the condition of the artificial saliva with the micro-tensile test. Methods??From May to July 2016?? 24 freshly extracted?? caries-free human third molars were selected and randomly divided into 3 groups??with 8 teeth in each group. Three self-etching adhesives were used??including Clearfil SE Bond??G-bond Plus and Single bond™ Universal. The standard specimens were made and selected??we divided the 160 standard specimens into two groups??80 specimens in each group. The immediate micro-tensile bond strength and that after 6 months of soaking in artificial saliva were tested. Fracture type was observed with the microscope. Results??The immediate micro-tensile bond strength of SE??n = 80????GBp??n = 80??and  SBU??n = 80??were??55.70 ± 11.07??????52.85 ± 7.54??and??62.82 ± 8.70??MPa??respectively. The immediate micro-tensile bond strength of SBU group was higher than that of SE and GBp group??and the difference was statistically significant??P < 0.05??. After 6 months of preservation in the articificial saliva??the micro-tensile bond strength of SE??GBp and SBU group were as follows??13.51 ± 4.99??????43.53 ± 6.82????and ??49.13 ± 6.58??MPa??statistical differences among the three groups were significant. The different fracture modes were found in three groups after 6 months in the artificial saliva. In SE??all fractures occurred in interface. In 80 GBp cases??16 fractures occurred in dentin??4 in composite resins. In 80 SBU cases??28 fractures were found in dentin??8 in composite resins. Conclusion??The micro-tensile bond strength of Single bond™ Universal is significantly higher than that of Clearfil SE Bond and G-Bond plus. Single bond™ Universal has strong bonding durablility and can provide good bonding effect in clinical application.     

Influence of the direction of tubules on bond strength to dentin

This study investigated the influence of the direction of dentinal tubules on resin-dentin tensile bond strength (mu TBS) using four commercially available bonding systems and observed the resin-dentin interfaces with an SEM. The dentin bonding systems used in this study were Clearfil Liner Bond II (LB, Kuraray), Imperva Fluoro Bond (FB, Shofu), Single Bond (SB, 3M) and One-Step (OS, BISCO). Thirty-six extracted caries-free human molars were used for micro tensile bond testing and eight additional teeth were used for scanning electron microscopy (SEM). The teeth were divided into two groups according to the direction of the dentinal tubules at the resin-dentin interface: a perpendicular group, in which the occlusal enamel was removed perpendicular to the long axis of the tooth, and a parallel group, in which the mesial half of the tooth was removed parallel to the long axis of the tooth, and the coronal dentin surface was used for bonding. After the flat dentin surfaces were polished with #600 silicon carbide paper, each surface was treated with one of the four adhesive systems according to the manufacturer's recommendation, then covered with resin composite (Clearfil AP-X, Kuraray) to provide sufficient bulk for micro-tensile bond testing. After 24 hours in 37 degrees C water, the resin-bonded teeth were serially sliced perpendicular to the adhesive surface, the adhesive interface trimmed to a cross sectional area of 1 mm2 and subjected to tensile forces at a crosshead speed of 1 mm/min. Statistical analysis of the tensile bond strengths were performed using two-way ANOVA and Fisher's PLSD test at 95% level of confidence. The tensile bond strength of the group with tubules parallel to the bonded interface was higher than that of tubules cut perpendicularly. This tendency reached statistical significance using SB and OS.     

Effect of remaining dentin thickness and the use of conditioner on micro-tensile bond strength of a glass-ionomer adhesive.

OBJECTIVES: The purpose of this study is to investigate the effect of remaining dentin thickness and the use of a 20% polyalkenoic acid conditioner on the micro-tensile bond strength of a glass-ionomer adhesive to dentin. METHODS: Resin composite was bonded to flat dentin surfaces from 14 extracted human teeth using Fuji BOND LC (GC) with or without a polyalkenoic acid conditioner, then sectioned to thin slabs, trimmed into an hourglass shape with the area of the interface being approximately 1mm(2), and subjected to micro-tensile testing at a cross-head speed of 1mm/min. Micro-tensile bond strengths were determined at three depth levels with a remaining dentin thickness of more than 3mm, between 2 and 3mm, and less than 2mm. Failure modes of the broken interfaces were determined using field-emission scanning electron microscopy. RESULTS: The micro-tensile bond strength to dentin significantly improved when the remaining dentin thickness increased and the conditioner was used. When the conditioner was used (irrespective of remaining dentin thickness), failures mainly occurred adhesively at the interface between the adhesive and resin composite. When no conditioner was used, no adhesive failures between the adhesive and resin composite occurred, but failures occurred mainly adhesively between dentin and the adhesive, or mixed adhesive-cohesively. SIGNIFICANCE: The bonding effectiveness of the glass-ionomer adhesive tested was affected by the area of intertubular dentin available for micro-mechanical retention through hybrid-layer formation. Removal of the smear layer improved the bond strength of the adhesive to dentin.     

Effect of an ethanol cross-linker on universal adhesive

ObjectiveTo evaluate the effects of N,N'-dicyclohexylcarbodiimide (DCC), an ethanol-based dentin cross-linker, on the immediate and long-term microtensile bond strength (μTBS) and nanoleakage expression of a universal adhesive employed in self-etch mode (SE) or etch-and-rinse mode (ER). The effect of DCC on the dentinal MMP activity was also investigated by means of in-situ zymography.MethodsEighty freshly extracted human molars were sectioned to expose mid-coronal dentin surfaces. The teeth were assigned to one of the following groups, according to the dentin surface priming/adhesive approach: (G1): DCC pre-treatment and Scotchbond Universal (SBU) in ER mode; (G2): SBU in ER mode; (G3): DCC pretreatment and SBU in SE mode; (G4): SBU in SE mode. μTBS test was performed immediately (T₀) or after 1-year aging (T₁₂) in artificial saliva. Ten additional teeth per group were prepared for nanoleakage evaluation (N = 5) and for in-situ zymography (N = 5).ResultsThree-factor analysis of variance revealed significant difference for the variables DCC pretreatment, application mode and aging (p < 0.05) for both microtensile bond strength testing and in-situ zymography. Nanoleakage analysis revealed reduced marginal infiltration of DCC experimental groups both at T₀ and T₁₂.SignificanceThe use of an ethanol-based primer containing DCC appears to be promising in preserving the stability of the adhesive interface of a universal adhesive, especially in the SE mode.     

不同浓度单宁酸在不同酸蚀模式下对通用型粘接剂粘接强度的影响

目的研究不同浓度单宁酸在全酸蚀与自酸蚀条件对通用型粘接剂在牙本质表面粘接强度的影响。 方法将60颗无龋离体人磨牙置于存储盒中随机盲取分成2组（全酸蚀A组与自酸蚀B组,n = 30）,再将每组随机分为5个亚组（n = 6）。在使用通用型粘接剂Single Bond Universal（SBU）前,在牙本质面分别涂抹浓度为0%（对照组）、25%、50%、75%和100%的单宁酸3 min并冲洗吹干。实验试件在37 ℃水中保存24 h后进行微拉伸强度测试（μTBSt）。使用Two-Way ANOVA与Games-Howell对数据进行统计学分析。用体式显微镜观察断裂面模式并在扫描电镜（SEM）下观察微拉伸试件的牙本质断端。 结果在全酸蚀模式下,75%单宁酸组粘接强度[（34.51 ± 8.43）MPa]与100%单宁酸组粘接强度[（36.16 ± 5.20）MPa]显著高于其他各组（F = 32.301,P<0.001）;在自酸蚀模式下,25%单宁酸[（31.06 ± 3.41）MPa]可显著提升SBU与牙本质粘接强度（F = 23.570,P<0.001）。双因素分析结果证实,单宁酸浓度（F = 23.134,P<0.001）与酸蚀模式（F = 4.465,P = 0.036）对粘接强度具有显著影响且两要素间显著相关（F = 28.231,P<0.001）。断裂模式分析与电镜观察结果表明,在牙本质表面不同酸蚀模式与不同浓度单宁酸所形成的界面形态差异显著。 结论在不同酸蚀模式下,不同浓度的单宁酸均可显著改善SBU与牙本质的粘接强度。