Kremeier Karin, Fasen Lutz, Klaiber Bernd, Hofmann Norbert
Department of Operative Dentistry and Periodontology, University of Würzburg, Pleicherwall 2, 97070 Würzburg, Germany.
Dent Mater. 2008 May;24(5):660-6. doi: 10.1016/j.dental.2007.06.029. Epub 2007 Aug 23.
To determine the influence of post type and luting material on bond strength to dentin.
The root canals of extracted human upper central incisors were instrumented and post space was prepared using the respective drills for each post system. Glass fiber posts (Luscent Anchor, Dentatus [LA]) were luted using three dual-curing adhesive systems (Excite DSC/Variolink II, Vivadent [VL2]; EnaBond/EnaCem, Micerium [ENA]; Prime & Bond NT/Calibra, DentSply DeTrey [CAL]). A different brand of glass fiber post (EasyPost, DentSply Maillefer [EP]) and quartz fiber post (DT Light Post, VDW [DT]) were luted using CAL. Gold posts (Perma-dor, VDW) were luted either adhesively following tribo-chemical silicate coating (Rocatec, ESPE-Sil, 3M ESPE; CAL) or conventionally using glass ionomer cement (Ketac Cem, 3M ESPE). Three slices of 2mm height were cut perpendicular to the post from each restored root. Bond strength was determined by pushing out the post using a universal testing machine (/1449, Zwick).
For all experimental groups combined, bond strength increased from the coronal to the apical section (Friedman test: P<0.001). Significant differences were observed among the fiber posts (DT/CAL>LA/CAL; Mann-Whitney U-test with Bonferroni-Holm adjustment: P<0.05; EP/CAL ranging in between) but not among luting materials (LA/VL2, LA/ENA, LA/CAL: n.s.). The gold posts were equivalent to DT/CAL with both luting procedures.
Selection of post type may be more important for bond strength than luting material. Bond strength of fiber posts was equivalent but not superior to adhesively or conventionally luted gold posts.
确定桩类型和粘结材料对牙本质粘结强度的影响。
对拔除的人上颌中切牙的根管进行预备，并使用每种桩系统各自的钻针制备桩道。使用三种双固化粘结系统（Excite DSC/Variolink II，Vivadent [VL2]；EnaBond/EnaCem，Micerium [ENA]；Prime & Bond NT/Calibra，DentSply DeTrey [CAL]）粘结玻璃纤维桩（Luscent Anchor，Dentatus [LA]）。使用CAL粘结不同品牌的玻璃纤维桩（EasyPost，DentSply Maillefer [EP]）和石英纤维桩（DT Light Post，VDW [DT]）。金桩（Perma-dor，VDW）要么在进行摩擦化学硅酸盐涂层处理（Rocatec，ESPE-Sil，3M ESPE；CAL）后粘结，要么传统地使用玻璃离子水门汀（Ketac Cem，3M ESPE）粘结。从每个修复后的牙根上垂直于桩切割三片2毫米高的切片。使用万能试验机（/1449，Zwick）推出桩来测定粘结强度。
对于所有合并的实验组，粘结强度从冠部到根尖部增加（Friedman检验：P<0.001）。在纤维桩之间观察到显著差异（DT/CAL>LA/CAL；采用Bonferroni-Holm校正的Mann-Whitney U检验：P<0.05；EP/CAL介于两者之间），但在粘结材料之间未观察到显著差异（LA/VL2、LA/ENA、LA/CAL：无显著性差异）。两种粘结方法下金桩的粘结强度与DT/CAL相当。
对于粘结强度而言，桩类型的选择可能比粘结材料更重要。纤维桩的粘结强度相当，但并不优于粘结或传统粘结的金桩。
