Grande da Cruz Fernanda Zander, Grande Christiana Zander, Roderjan Douglas Augusto, Galvão Arrais César Augusto, Bührer Samra Adriana Postiglione, Calixto Abraham Lincoln
Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, PR, BRAZIL.
Eur J Dent. 2012 Jul;6(3):248-54.
To evaluate the effects of etch-and-rinse and self-etching adhesive systems on Vickers hardness (VHN) uniformity of dual-cured resin cements after fiber post cementation.
FIFTY GLASS FIBER POSTS WERE CEMENTED INTO BOVINE ROOTS USING THE FOLLOWING CEMENTING SYSTEMS: Prime&Bond 2.1 Dual Cure and Enforce with light-activation (PBDC-LCEN); Prime&Bond 2.1 and Enforce with light-activation (PB-CLEN); Prime&Bond 2.1 Dual Cure and Enforce without light exposure (PBDC-SCEN); ED Primer and Panavia 21 (ED-SCPN); and Clearfil SE Bond and Panavia 21 (CF-SCPN). The roots were stored in distilled water for 72 h and transversely sectioned into thirds (coronal, medium, and apical). The VHN values of the resin cement layers were measured close to the post and to the dentin wall on the transversely sectioned flat surfaces. The results were analyzed by three-way repeated measures analysis of variance (ANOVA) and Tukey's post-hoc test (pre-set alpha of 5%).
Most resin cements presented higher VHN values near the post than near the dentin wall. The ED-SCPN group showed the highest VHN values regardless of the root third, while the self-cured group PBDC-SCEN exhibited the lowest values. The resin cements from the light-activated groups PBDC-LCEN and PB-LCEN showed lower VHN values at the apical third than at the coronal third. The VHN values were not influenced by the root third in self-cured groups PBDC-SCEN, ED-SCPN, and ED-SCPN.
Depending on the product, bonding agents might promote changes in hardness uniformity of resin cements after post cementation.
评估酸蚀冲洗粘结系统和自酸蚀粘结系统对纤维桩粘结后双固化树脂水门汀维氏硬度（VHN）均匀性的影响。
使用以下粘结系统将50根玻璃纤维桩粘结到牛牙根中：Prime&Bond 2.1双固化粘结剂与Enforce光固化粘结剂（PBDC-LCEN）；Prime&Bond 2.1粘结剂与Enforce光固化粘结剂（PB-CLEN）；Prime&Bond 2.1双固化粘结剂与Enforce非光固化粘结剂（PBDC-SCEN）；ED Primer粘结剂与Panavia 21粘结剂（ED-SCPN）；Clearfil SE Bond粘结剂与Panavia 21粘结剂（CF-SCPN）。将牙根保存在蒸馏水中72小时，然后横向切成三段（冠部、中部和根尖部）。在横向切割的平面上，靠近桩和牙本质壁处测量树脂水门汀层的VHN值。结果采用三因素重复测量方差分析（ANOVA）和Tukey事后检验（预设α=5%）进行分析。
大多数树脂水门汀在靠近桩处的VHN值高于靠近牙本质壁处。无论牙根的哪一段，ED-SCPN组的VHN值最高，而自固化组PBDC-SCEN的VHN值最低。光固化组PBDC-LCEN和PB-LCEN的树脂水门汀在根尖段的VHN值低于冠段。在自固化组PBDC-SCEN、ED-SCPN和CF-SCPN中，VHN值不受牙根段的影响。
根据产品不同，粘结剂可能会导致桩粘结后树脂水门汀硬度均匀性发生变化。
