两种脱敏剂对复合树脂粘接剂与牙本质间粘接强度的影响

目的研究劲润脱敏剂与多乐氟对复合树脂粘接剂与牙本质间粘接强度的影响,为脱敏剂与粘接剂的选用提供相关依据。方法将15颗新鲜离体牙预备出牙本质面并随机分为3组,其中两组离体牙的牙本质面分别用劲润脱敏剂、多乐氟处理后,一组不使用脱敏剂,选用可乐丽菲露SAC复合树脂粘接剂将玻璃陶瓷粘于处理后的牙本质表面,万用力学实验机作剪切测试(1 mm/min)。结果劲润脱敏剂处理后,可乐丽菲露SAC复合树脂粘接剂平均剪切强度增强,但与空白组间无统计学差异(P>0.05);多乐氟处理,可乐丽菲露SAC复合树脂粘接剂平均剪切强度减小,且与空白组间有统计学差异(P<0.05)。结论劲润脱敏剂对可乐丽菲露SAC复合树脂粘接剂的粘接效果无不良影响;多乐氟会降低可乐丽菲露SAC复合树脂粘接剂的粘接强度。     

不同表面处理方法对玻璃渗透陶瓷与牙本质粘接强度的影响

观察喷砂，酸蚀及硅烷偶联剂等表面处理方法对玻璃渗透陶瓷与牙本质粘接强度的影响。将24个陶瓷试件分为4组，分别用上述3种方法进行表面处理，未处理组为对照组，用Super-Bond与牙本质粘接，测其剪切强度，结果显示，喷砂硅烷处理组的粘接强度明显高于其他3组（P＜0．01），酸蚀硅烷处理组与单纯硅烷处理组的粘接强度之间差异无显著性意义（P＞0．05），对照组的粘接强度显著低于处理组（P＜0．01），研究表明，玻璃渗透陶瓷可以用喷砂和硅烷联合进行表面以获得满意的粘接强度。     

两种粘结剂影响树脂抗剪切强度的比较实验

目的比较两种粘结材料对树脂与离体牙间的抗剪粘结强度,以及唾液污染对其的影响,为l临床材料的选择提供理论参考。方法选择临床上因牙周炎拔除的中切牙标本40颗,于唇面中份牙本质上形成大于4mm×4mm的平面．分别应用3MAdper Prompt和3MAdper Singe Bond2将直径为2．2mm,厚度2mm的树脂柱粘贴于离体牙上,测定其抗剪粘结强度。结果两种粘结剂在无唾液情况下的粘结强度分别为（16．882±2．941）N／mm、（20．720±2．502）N／mm;在唾液污染情况下,则分别为（16．748±2．583）N／mm、（17．452±2．361）N／mm。结论无唾液污染的情况下,全酸蚀粘结的效果优于自酸蚀粘结：在同一种粘结剂条件下,唾液的存在对自酸蚀粘结效果无显著影响,但明显影响全酸蚀的粘结效果。     

Er,Cr:YSGG激光对非龋性硬化牙本质超微形态的作用及对其粘接性能的影响

目的在扫描电镜下观察Er,Cr:YSGG激光照射后非龋性硬化牙本质的表面形态特点,及硬化牙本质-充填材料间粘接界面的微观形态特点,评价Er,Cr:YSGG激光对非龋性硬化牙本质的作用及对其粘接性能的影响。方法选取咬合面有典型硬化牙本质的离体磨牙20颗,将其随机分成四组,A组用Er,Cr:YSGG激光照射表面,B组用Er,Cr:YSGG激光照射后35%磷酸酸蚀处理表面,C组用Er,Cr:YSGG激光照射后35%磷酸酸蚀+复合树脂充填,D组用Er,Cr:YSGG激光照射后使用玻璃离子水门汀充填。C、D组样本牙充填完成后,垂直于粘接界面方向片切开以暴露出粘接界面。在扫描电子显微镜下观察A、B组非龋性硬化牙本质表面的微观形态特点,及C、D组硬化牙本质-充填材料粘接界面的形态特点。结果扫描电子显微镜下可见,经Er,Cr:YSGG激光照射后硬化牙本质表面粗糙、无玷污层,但牙本质小管开口较小或是完全堵塞;激光照射加35%磷酸酸蚀后可见牙本质小管开口明显增多,多数牙本质小管内有硬化柱突出。粘接界面观察可见复合树脂充填组混合层较薄,混合层、树脂突及牙本质小管内的硬化柱形成紧密连接,玻璃离子水门汀充填组可见硬化牙本质与充填材料粘接较紧密无明显微裂隙。结论使用Er,Cr:YSGG激光预备非龋性硬化牙本质,有助于改善其表面形态,从而利于提高其粘接性能。     

Er,Cr∶YSGG激光备洞对老年人非龋性硬化牙本质微拉伸粘接强度的影响

目的评价Er,Cr∶YSGG激光备洞对硬化牙本质微拉伸粘接强度的影响,并比较其对两种不同充填材料粘接强度的影响。方法 40颗带有楔状缺损的老年人前磨牙,表面有典型硬化牙本质,随机分成实验组和对照组。实验组用Er,Cr∶YSGG激光备洞,对照组用牙科高速涡轮手机备洞,实验组和对照组再各分两个亚组,均分别用复合树脂和玻璃离子水门汀充填。所有样本在37℃蒸馏水中放置24 h,然后制备成厚度约1 mm的哑铃型片状试件,在Instron 5848微力试验机上测定微拉伸粘接强度,在扫描电镜下观察牙本质断面的表面形态。结果实验组中复合树脂组的微拉伸粘接强度为（35.24 7.05）Mpa,玻璃离子水门汀组微粒伸粘接强度（17.71 5.74）Mpa,对照组中复合树脂组微粒伸粘接强度（27.56 4.79）Mpa,玻璃离子水门汀组微粒伸粘接强度（11.47 5.12）Mpa。实验组和对照组的微拉伸粘接强度比较差异有显著意义（P〈0.05）,两组复合树脂组和玻璃离子水门汀组的微拉伸粘接强度比较;差异有显著意义（P〈0.05）。结论 Er,Cr∶YSGG激光备洞老年人非龋性硬化牙本质后的粘接强度高于高速涡轮手机预备者,复合树脂的粘接强度优于玻璃离子水门汀。     

两种粘结剂在不同吹薄气流条件下牙本质粘结界面的激光扫描共聚焦显微镜观察

目的：比较粘结剂SingleBond和ClearfilSEBond在不同吹薄气流下对人牙本质混合层的粘结剂渗透情况的影响,为临床选择粘结剂及正确操作提供试验依据。方法：正畸减数拔除的无龋坏人磨牙24颗,磨除牙釉质,暴露牙本质,预备出统一的粘结面。随机选择应用粘结剂SingleBond（SB）或ClearfilSEBond（SE）,按分组使用轻吹,重吹,3S,10s的吹薄方式进行粘结,并复合树脂冠修复。将试件片切到约1mm厚,打磨直至透光为止,通过激光共聚焦分析比较。结果：全酸蚀粘结剂sB与自酸蚀粘结剂sE之间相比,自酸蚀粘结系统树脂突较短,混合层相对较薄。sBg3、sEg3组表现为粘结剂层过厚,树脂突短小,稀少;SEglO、SEs3、SBglO及SBs3组粘结剂层相对均匀一致,厚度适宜,树脂突密度大;SEsl0、SBsl0组粘结剂被吹散,厚度较薄且分布不均匀,个别区域甚至没有粘结剂,但渗入的树脂突比较长。结论：SingleBond的渗透程度高于ClearfilSEBond;不论SingleBond还是ClearfilSEBond,在吹薄气流的压力与时间方面,建议使用微风10s或强风3s气吹粘结剂表面后固化的操作方法。     

四种黏结方法在离体氟斑牙上正畸托槽黏结强度实验研究

目的筛选出一种与氟斑牙有较高黏结强度的临床可行的正畸黏结方法。方法本研究分四组，A组：在干性环境下以京津化学固化型釉质黏合剂黏结托槽，作为对照组；B组：在干性环境下以日本可乐丽公司的化学固化型釉质黏合剂黏结托槽：C、D组：分别在干性、湿性环境下以日本可乐丽公司的SE-BOND光聚合型牙科树脂黏合剂＋可乐丽AP—X光固化复合树脂黏结托槽。黏结后置于37℃温箱中，半小时后进行剪切强度测试及ARI计分。结果A、B组的剪切强度分别为2．212MPa和2．233MPa，C、D组的剪切强度分别为4．268MPa和4．253MPa，C、D组与A、B组之间存在显著差异，A组与B组、c组与D组之间无显著差异。各组样本在祛除托槽时牙面残留黏结剂情况无显著差异。结论可乐丽菲露”SE-BOND牙质粘合用处理剂与氟斑牙界面所达到剪切黏结强度与临床要求有差距，但较传统方法有了很大提高。     

不同能量激光预处理对牙本质粘接性能及微渗漏的影响

目的 探究不同能量激光预处理对牙本质粘接性能及微渗漏的影响。方法 选取2021年5月至2022年5月，冠周炎拔除的104颗无龋人第三磨牙，去除牙冠牙釉质后将其制成牙本质片，分为低激光能量组、高激光能量组、酸性处理组和空白对照组，每组26颗牙,每组52片牙本质片。低能量组采用每个脉冲输出能量85mJ、照射时间30 s、光斑大小400μm预处理；高能量组采用每个脉冲输出能量350 mJ、照射时间30 s、光斑大小400μm预处理；酸性处理组采用9.6%氢氟酸酸蚀处理后不进行激光照射，空白对照组不进行任何处理。采用剪切强度测试检测各组牙本质粘接性能，采用微渗漏实验检测各组牙齿镶嵌的密合性。比较不同能量激光预处理对牙本质粘接性能及微渗漏的影响。结果 各组预处理后，酸蚀剂处理组牙本质粘接性能（10.0±2.3） MPa、低能量组牙本质粘接性能（12.2±2.9） MPa、高能量组牙本质粘接性能（14.65±3.49） MPa，显著高于空白对照组的（2.32±0.6） MPa，四组间比较差异具有统计学意义（P<0.05）；酸蚀剂处理组牙本质微渗漏（547.4±118.6）μm、低能量组预处理...     

固位形及粘结剂种类对楔状缺损树脂修复的影响

目的比较修复楔状缺损时制备固位形及不同粘结剂对临床疗效的影响。方法选择口内至少4颗楔状缺损的患者89例,609颗患牙,同一患者分别采用四种方法修复患牙（固位形＋两步法自酸蚀牙本质粘结系统Clearfil SE Bond;固位形＋一步法自酸蚀牙本质粘结系统iBond;无固位形＋两步法自酸蚀牙本质粘结系统Clearfil SE Bond;无固位形＋一步法自酸蚀牙本质粘结系统iBond）,采用自身对照的方法进行为期1年的临床观察。结果固位形组的成功率明显高于无固位形组,两者差异有统计学意义;无固位形组中两步法自酸蚀牙本质粘结系统ClearfilSEBond组的成功率高于一步法自酸蚀牙本质粘结系统iBond组,两者差异有统计学意义,但二者在边缘密闭性和术后敏感方面差异没有统计学意义。结论修复楔状缺损时,制备固位形有助于提高疗效;两步法自酸蚀牙本质粘结系统Clearfil SE Bond较一步法自酸蚀牙本质粘结系统iBond具有更高的粘结强度。     

两种不同粘结剂和预备方法对牙本质粘结强度的影响

目的评价激光照射对牙本质表面形态的改变,比较两种不同粘结剂和预备方法对牙本质粘结强度的影响。方法收集新鲜拔除的完整第三磨牙24颗,分为牙钻(A组)组和Er,Cr∶YSGG激光(B组)组两大组,两种预备方法暴露牙本质。再按照粘接剂不同随机分为Adper Easy One(A1、B1组)组;Single Bond Universal(A2、B2组)组,每组5颗牙齿;对照组(A3、B3组)组,每组2颗牙齿。其中,对照组在牙本质预备后不使用粘接剂处理。A3组和B3组使用扫描电子显微镜观察表面形态。其余各组使用树脂粘结后,制作哑铃型试件测试微拉伸粘结强度。采用两因素方差分析和组间比较进行统计学分析。结果扫描电镜检测结果显示牙钻组有明显玷污层;激光组表面不规则,干净,牙本质小管开放。牙钻组和激光组对牙本质微拉伸粘结强度的影响比较,差异无统计学意义(P>0.05);在牙钻组和激光组中,A2组对牙本质微拉伸粘结强度高于A1组;B2组对牙本质微拉伸粘结强度高于B1组,差异具有统计学意义(P<0.05)。结论 Er,Cr∶YSGG激光预备牙本质可形成"酸蚀"样的表面形态,与牙钻预备相比对牙本质...     

光强度对双固化树脂黏接剂与牙本质黏接强度的影响

 目的 比较不同光强度对双固化树脂黏接剂与牙本质的黏接强度影响。方法 将40颗恒磨牙,暴露咬合面牙本质后随机分为两组,每组20颗牙。DC组用双重固化树脂黏接剂Clearfil DC Bond处理,SE组用光固化树脂黏接剂Clearfil SE Bond处理后,端端对接从近中方向光照。将黏接试样沿光照方向切成5片(1 mm/片,L_1~5),再将每片垂直黏接界面切出5个微拉伸样本(1 mm×1 mm),测试两组黏接强度(mTBS)。结果 随着穿透牙本质厚度增加,光强度降低导致黏接强度下降。部分样本在制备时发生界面折断,SE组存留样本L₁ 70%,L₂ 30%,L_3~5为0;DC组L_1~5分别为68%,86%,56%,44%和38%。SE 组L_1~5黏接强度分别为:(13.22±8.64)MPa,(7.49±3.88)MPa,0、0、0 MPa;DC组为:(11.25±4.11)MPa,(9.69±5.07) MPa,(8.13±4.88)MPa,(6.83±3.53)MPa和(5.56±2.95) MPa。两组表面两层黏接强度无统计学差异。结论 双固化黏接剂与牙本质的黏接强度随着固化光穿透牙本质深度的增加而降低。     

Influence of photodynamic therapy and different lasers Er,Cr:YSGG and Er,YAG on dentin conditioning bonded to conventional and bioactive cement

AimThe aim of the present study was to evaluate the bond integrity of bioactive cement (BA_c) in contrast to conventional cement Calibra (C) after dentin treated with different surface conditioners (PDT, EYL, ECL)Materials and MethodsSixty non-carious permanent mandibular molars were disinfected and embedded in acrylic resin till cement-o-enamel junction. For homogeneity the buccal surface were grounded and polished. Samples were categorized into three main groups based on conditioning technique. Samples in group 1 and 2 dentin conditioned with Er,Cr:YSGG (ECL), group 3 and 4 surface treated with Er:YAG (EYL) and group 5 and 6 treated with photodynamic therapy (PDT).On conditioned surface bonding agent was applied and light cured. Samples from group 1,3,5 were bonded to Calibra (C). Whereas, specimens in group 2,4,6 were conditioned with bioactive cement (BA_c) and subjected to ageing followed by shear bond strength testing (SBS) in universal testing machine. To detect significance difference between means of different groups analysis of variance (ANOVA) was performed followed by Tukey’s post-hoc tests.ResultsThe maximum SBS was displayed in group 1, dentin conditioned with ECL and bonded to C (20.23 ± 0.47 MPa). Whereas, group 6, PDT of dentin to BA_c demonstrated lowest bond integrity among experimental groups (12.97 ± 0.25 MPa). Bond strength of group 1, ECL-C (21.55 ± 3.08 MPa) and group 3 EYL-C (19.11 ± 0.65 MPa) were comparable (p > 0.05). Group 5 samples treated with PDT, MB-C (13.41±0.32 MPa) and group 6, MB-BA_c (12.97 ± 0.25 MPa) were also comparable (p > 0.05)ConclusionBAc bonded to dentin after surface conditioning with ECL, EYL and PDT presented lower SBS in comparison to conventional cement C. Further studies are required to extrapolate the current findings.     

Efficacy of chlorhexidine,photosensitizers, green tea extract,and propolis on bond integrity and microleakage of caries-affected dentin: An in-vitro study

AimThe current study aimed to evaluate the efficacy of chlorhexidine (CHX), phycocyanin photosensitizer (PC), green tea extract (GTE), and propolis (PP) on the adhesive bond integrity and microleakage of caries-affected dentin (CAD) using etch and rinse adhesive system.Material and methodsA sum of 80 extracted human mandibular molars was collected and assessed using ICDAS criteria. Randomly CAD samples were treated with different disinfectants (n = 20) each CHX, PC, GTE, and PP. After ensuring disinfection, specimens were rehabilitated with bulk-fill composite resin employing etch and rinse adhesive system. SBS testing was performed by engaging (n=10) specimens in a universal testing machine. Microleakage analysis was performed by using the dye penetration technique.A stereomicroscope under 40× magnification was utilized for analyzing failure modes. Statistical analysis was accomplished by using the ANOVA and Tukey's post hoc tests (p<0.05).ResultsHighest bond strength was displayed by CAD disinfection with CHX and bonded to resin cement (15.33 ± 0.14 MPa). Whereas, the lowest SBS bond value was presented by Group 2 dentin surface disinfection with PC. CAD disinfected with GTE, PP and CHX demonstrated comparable SBS(p>0.05). The maximum microleakage score was exhibited when CAD bonded to resin cement disinfected with PP. While the minimum microleakage score was unveiled CAD bonded to resin cement sanitized with CHXConclusionCaries-affected dentin bonded to resin cement, chlorhexidine exhibited the highest adhesive shear bond strength with a minimal microleakage score using etch and rinse adhesive system.     

Influence of methylene blue,Riboflavin, and indocyanine green on the bond strength of caries affected dentin when bonded to resin-modified glass ionomer cement

AimThe present study aimed to assess the influence of methylene blue (MBP), Riboflavin, and indocyanine green (ICG) on the bond strength of caries affected dentin (CAD) when bonded to resin-modified glass ionomer cement (RMGIC).Materials and MethodsHuman third molars with caries lesions were isolated and collected scrutinized based on ICDAS criteria. The teeth were cleaned using a periodontal scaler and disinfected. All samples were positioned in polyvinyl up to the cementoenamel junction. The samples were randomly distributed into five groups based on the pretreatment regime. Samples in group 1, were pretreated with MBP; group 2, polyacrylic acid (PAA) group 3, ICG, group 4, Riboflavin photosensitizer, and group 5, 37% phosphoric acid (PA). All samples were bonded with RMGIC. 10 samples were subjected to the universal testing machine for shear bond strength (SBS) testing. Five samples from each group were placed in fuchsine dye for the microleakage assessment. Comparison of means and standard deviations (SD) of SBS and microleakage in investigated groups was performed using analysis of variance (ANOVA) and Tukey's post hoc test at a significance level (p = 0.05)ResultsThe highest micro shear bond values were observed in group 2 (CAD conditioned with PAA) (14.26±1.67 MPa). Whereas, the lowest bond values were found in group 1 (treated with MBP) (8.82±1.08 MPa). CAD conditioned with different photosensitizers i.e., MBP, ICG, and Riboflavin before bonding to RMGIC displayed comparable bond values (8.82±1.08 MPa), (9.47±0.21 MPa), and (11.23±0.47 MPa) respectively (p>0.05). Samples conditioned with 37% PA showed significantly higher microleakage scores compared to other surface-treated groups (p<0.05).ConclusionCaries-affected dentin conditioned with polyacrylic acid demonstrated low microleakage and high bond strength.     

脉冲Nd:YAG激光照射牙硬组织后拉力实验

目的研究不同能量和不同频率脉冲Nd:YAG激光照射牙表面后,牙齿与光敏树脂间的拉力大小。方法选择一致性较好的新鲜离体人牙,用高速转头制备各类洞型。然后分别用磷酸腐蚀和不同能量和频率的脉冲Nd:YAG激光进行照射,以光敏树脂进行光固化后做拉力实验并进行比较。结果脉冲Nd:YAG激光刻蚀人牙光固化树脂平均拉力68.9-75.5Kg/cm2,酸腐蚀光固化树脂平均拉力为20.6Kg/cm2,差异有显著意义(P<0.05)。结论用脉冲Nd:YAG激光照射代替磷酸进行牙齿表面处理可增加牙齿与光敏树脂间的粘结力。     

齿科用纤维加强树脂基复合材料表面纤维走向对粘接强度的影响

目的：比较齿科用纤维加强树脂基复合材料表面纤维走向对粘接强度的影响。方法将纤维加强树脂基复合材料切割成正方体试件,LuxaCore Z-Dual树脂水门汀粘接后扫描电镜下观察试件表面的纤维走向和粘接界面微观形态;将试件按粘接面纤维走向的不同分为A（横断面对横断面）、B（横断面对纵断面）、C（纵断面对纵断面）3组,每组20个标本,LuxaCore Z-Dual树脂水门汀粘接,万能测试仪测量剪切粘接力的大小。结果试件断面纤维方向均匀一致,粘接界面无气泡和裂隙;各组剪切粘接力比较,3组间差异无统计学意义（P>0.05）。结论粘接表面纤维走向对纤维加强树脂基复合材料的粘接强度无显著影响。     

Disinfection of caries affected dentin using rose bengal,titanium sapphire laser; ammonium hexa-fluorosilicate,and ozonated water on resin dentin bond strength

AimThe present study intended to evaluate the shear bond strength (SBS) of resin cement bonded to caries affected dentin (CAD) after disinfection with rose Bengal (RB), Ti-Sapphire Laser, Ammonium Hexafluorosilicate (NH₄)₂[SiF₆], and ozonated water (O₃).Material and MethodsA total of 100 extracted human mandibular molars were acquired using caries severity code, 6 of the ICDAS criteria. To achieve homogeneity and prevent size-biased distributions, the average cavity preparation of all specimens had a depth of 2 mm and a breadth of 3 mm. Specimens were divided into five groups (n = 20) at random according to type of disinfection. Group 1: control group, Group 2: RB, Group 3: O₃, Group 4: Ti-sapphire laser, and Group 5: (NH4)2[SiF₆]. All specimens were etch and rinsed, bonding agent was applied and restored with resin cement. Estimation of SBS was performed by placing samples (10/group) in universal testing machine. Stereomicroscope under 40 × magnification was employed for failure mode analysis (FMA). Statistical analysis was executed using the ANOVA and the Tukey multiple test (p<0.05).ResultsThe highest SBS was demonstrated in the control group when CAD bonded to resin cement without disinfection (18.22±1.14 MPa). Likewise, the lowest SBS values were unveiled by CAD disinfection with O₃ (12.44±1.36 MPa). Similarly, CAD when disinfected with RB (16.25±1.01 MPa) and Ti-sapphire laser (16.25±1.22 MPa) bonded to resin cement exhibited comparable bond results (p>0.05).ConclusionCaries affected dentin when treated with etch and rinse technique without the use of disinfectant displayed the highest SBS. However, it was seen that utilization of various disinfectants altered the adhesion capacity or bonding efficacy of caries-affected dentin.