定制化和光固化装置对玻璃纤维桩粘结强度影响的体外研究

Gustavo do Prado Schoenhals, L. P. Chaves, F. Naufel
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摘要

髓内治疗的牙齿通常受到广泛的结构损失的影响,需要使用根内桩来提供固位和修复。目的对玻璃纤维桩与根牙本质的结合进行体外评价。材料和方法在一项3 × 3 × 3的析因研究中使用了90根(n = 10)单牛根,并进行了细分:定制后改变了树脂的存在和类型(无定制,常规树脂和散装填充树脂),光固化装置(Valo, Radii-Cal, Rainbow)和根三分之一(颈根,中根和根尖)。结果在自定义因子方面,Tukey检验(5%)显示Bulk Fill组(8.16 MPa)和Z350组(7.40 MPa)优于对照组(4.92 MPa),两者之间没有差异。各光固化器件存在差异,作为中间体的Valo (9.36 MPa)、Radii (6.96 MPa)具有优势,Rainbow (4.17 MPa)具有劣势。颈根三分之一(7.81 MPa)较优,根尖三分之一(5.80 MPa)较劣,中间三分之一(6.88 MPa)与其他三分之一无差异。结论无论使用何种树脂,定制的玻璃纤维桩都能增加与根本质的结合强度。当使用较低光强的光固化装置时,在根尖三分之一处存在妥协。
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Influence of customization and light-curing device on the bond strength of glass fiber posts - in vitro study
Abstract Introduction Endodontically treated teeth are usually affected by extensive structure loss requiring the use of intraradicular posts to provide retention and restoration. Objective An in vitro assessment was performed on the bonding of glass fiber posts to the root dentin. Material and method Ninety (n = 10) single bovine roots were used in a 3 x 3 x 3 factorial study with subdivided plots: post customization varying the presence and type of resin (without customization, conventional resin, and Bulk Fill resin), light-curing device (Valo, Radii-Cal, Rainbow), and root third (cervical, middle, and apical). Result For the customization factor, Tukey’s test (5%) showed the superiority of the Bulk Fill (8.16 MPa) and Z350 (7.40 MPa) groups compared to the control group (4.92 MPa), without differing from each other. All light-curing devices differed, showing the superiority of Valo (9.36 MPa), Radii (6.96 MPa) as an intermediate, and the inferiority of Rainbow (4.17 MPa). The cervical root third (7.81 MPa) was superior, the apical third was inferior (5.80 MPa), and the middle third (6.88 MPa) was an intermediate without differing from the others. Conclusion The customization of glass fiber posts increases the bond strength to the root dentin, regardless of the resin used. There was a compromise in the apical third and when using light-curing devices with lower light intensity.
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