Nadler Ana-Michelle-Oliveira, da Silva Evair-Josino, Lins-Filho Paulo-Cardoso, Dias Marlon-Ferreira, Guimarães Renata-Pedrosa, da Silva Claudio-Heliomar-Vicente, Silva Sérgio-Dos Santos, Gomes Anderson-Stevens-Leonidas
PhD Student of the Dentistry Post-Graduate Program, Universidade Federal de Pernambuco, Recife, Brazil.
PhD Student of the Post-Graduate Program in Oral Rehabilitation, Universidade Estadual de São Paulo - UNESP, Araraquara, Brazil.
J Clin Exp Dent. 2023 Aug 1;15(8):e649-e657. doi: 10.4317/jced.60452. eCollection 2023 Aug.
Failures in glass fiber post (GFP) retention may be associated with low adhesion achieved in root dentin.
55 single-rooted premolars were endodontically treated and distributed according to different adhesion strategies (n=11): G1: RelyX ARC (3M ESPE; etch-rinse strategy); G2: Relyx Ultimate (3M ESPE; etch-rinse strategy); G3: AllCem (FGM; etch-rinse strategy); G4: Relyx Ultimate (3M ESPE; self-etching strategy); G5: RelyX U200 (3M ESPE; self-adhesive strategy). For Bonding Strength (BS) analysis, the roots were sectioned in slices (1.0mm thickness) corresponding to each root third and submitted to push-out test. The type of failure was assessed by scanning electron microscopy (SEM).
The highest BS averages were found in G2 and G3. However, in the middle and apical root thirds, G3 showed statistically similar results to G4 and G5. In the cervical and middle third, G1 was statistically similar to G4 and G5. The mixed type of failure was the most common in all groups.
Self-etching (G4) and self-adhesive resin (G5) cements, showed similar BS results of immediate bonding in the cementation of GFP compared to conventional resin cements (G1, G2, G3). Dental Cements, Dentin-Bonding Agents, Post and Core Technique, Dental Bonding.
玻璃纤维桩（GFP）固位失败可能与牙本质粘结力低有关。
选取55颗单根前磨牙进行根管治疗，并根据不同的粘结策略进行分组（n = 11）：G1：RelyX ARC（3M ESPE；酸蚀冲洗策略）；G2：RelyX Ultimate（3M ESPE；酸蚀冲洗策略）；G3：AllCem（FGM；酸蚀冲洗策略）；G4：RelyX Ultimate（3M ESPE；自酸蚀策略）；G5：RelyX U200（3M ESPE；自粘结策略）。为进行粘结强度（BS）分析，将牙根切成对应牙根各三分之一的薄片（厚度1.0mm），并进行推出试验。通过扫描电子显微镜（SEM）评估失败类型。
G2和G3组的BS平均值最高。然而，在牙根中三分之一和根尖三分之一处，G3组与G4组和G5组的结果在统计学上相似。在颈三分之一和中三分之一处，G1组与G4组和G5组在统计学上相似。所有组中最常见的失败类型为混合型。
与传统树脂粘结剂（G1、G2、G3）相比，自酸蚀（G4）和自粘结树脂（G5）粘结剂在GFP粘结时的即时粘结BS结果相似。牙科粘结剂、牙本质粘结剂、桩核技术、牙齿粘结。
