Turkes Basaran Elif, Kazak Magrur, Gokce Kagan, Benderli Gokce Yasemin
Department of Restorative Dentistry, Faculty of Dentistry, Yeditepe University, Istanbul, Turkey.
Department of Restorative Dentistry, School of Dental Medicine, Bahcesehir University, Istanbul, Turkey.
PeerJ. 2025 Aug 11;13:e19853. doi: 10.7717/peerj.19853. eCollection 2025.
This preliminary study evaluates the impact of different chemical surface pretreatments on the surface roughness (Ra) of fiber posts and the shear bond strength (SBS) at the interface between the horizontal surface of fiber posts and resin cement, highlighting an area that has not been extensively researched.
Fifty glass fiber posts (Cytec Blanco, Hahnenkratt) were used, and polishing discs were employed to create a horizontally flat surface. Their dimensions were standardized using a digital caliper and divided into two pieces from each post ( = 20). The experimental groups included different pretreatment protocols: Group I (Control) had no pretreatment, Group II used 4% hydrofluoric acid (HF) (Porcelain Etchant, Bisco), Group III used 9.6% HF (Porcelain Etch Gel, Pulpdent), Group IV used 20% hydrogen peroxide (HP) (Merck KGaA), and Group V used 35% HP (Whiteness HP, FGM). Ten specimens from each pretreatment group were used for Ra evaluation (Perthometer Mahr), while the other ten were prepared for SBS testing. Silane and primer were applied before dual-cure resin cement (Multilink N, Ivoclar Vivadent), and SBS was tested after 48 h using a universal testing machine (Instron). SBS and Ra data were analyzed with one-way ANOVA and Tukey's tests ( < 0.05).
Statistical analysis revealed no significant pairwise differences when evaluating SBS values ( = 0.055). However, Groups IV and V exhibited higher SBS values compared to Groups I, II, and III. While 20% HP and 4% HF did not significantly enhance SBS, higher concentrations of HP achieved clinically acceptable bond strength. The surface pretreatment methods significantly influenced Ra ( = 0.00003). Groups III and IV exhibited significantly higher Ra values than Groups I, II, and V.
This preliminary study indicates that chemical surface pretreatments can be safely used to enhance the bond strength between fiber posts and resin cement, as they are not time-consuming, easy to use, and clinically applicable.
本初步研究评估了不同化学表面预处理对纤维桩表面粗糙度（Ra）以及纤维桩水平表面与树脂水门汀界面处的剪切粘结强度（SBS）的影响，突出了一个尚未得到广泛研究的领域。
使用了50根玻璃纤维桩（Cytec Blanco，Hahnenkratt），并使用抛光盘制作出水平平整表面。使用数字卡尺对其尺寸进行标准化，并将每根桩分成两段（n = 20）。实验组包括不同的预处理方案：第一组（对照组）未进行预处理，第二组使用4%氢氟酸（HF）（瓷蚀刻剂，Bisco），第三组使用9.6% HF（瓷蚀刻凝胶，Pulpdent），第四组使用20%过氧化氢（HP）（默克集团），第五组使用35% HP（美白HP，FGM）。每个预处理组的10个样本用于Ra评估（马尔表面粗糙度仪），另外10个样本用于SBS测试。在应用双固化树脂水门汀（Multilink N，义获嘉伟瓦登特）之前先应用硅烷和底漆，并在48小时后使用万能试验机（英斯特朗）测试SBS。使用单因素方差分析和Tukey检验（p < 0.05）分析SBS和Ra数据。
在评估SBS值时，统计分析显示没有显著的两两差异（p = 0.055）。然而，第四组和第五组的SBS值高于第一组、第二组和第三组。虽然20% HP和4% HF没有显著提高SBS，但较高浓度的HP达到了临床可接受的粘结强度。表面预处理方法对Ra有显著影响（p = 0.00003）。第三组和第四组的Ra值显著高于第一组、第二组和第五组。
本初步研究表明，化学表面预处理可安全用于提高纤维桩与树脂水门汀之间的粘结强度，因为它们不耗时、易于使用且临床适用。
