title: Effect of post-space treatments on the push-out bond strength and failure modes of glass fibre posts.
abstract: The aim of this study was to evaluate the effect of different post-space treatments on the push-out bond strength and failure modes of glass fibre posts. Forty mandibular premolar roots were cut and endodontically treated. Post spaces were prepared and roots were divided into four groups. In group 1 distilled water irrigation (control), in group 2 2.25% NaOCl irrigation, in group 3 2.25% NaOCl + 17% EDTA irrigation were done and in group 4 diode laser was applied to the prepared post spaces. Scanning electron microscope (SEM) analysis was made for each group. Fibre posts were then luted with resin cement. Each root was prepared for push-out test. Data were statistically analysed with anova (P = 0.05). After push-out test, the failure modes were observed but not statistically analysed. There were statistically significant differences between Group 3 and Group 2 in both regions (P < 0.05), also in the middle region of Group 4 and Group 2 (P < 0.05). Cervical root segments showed higher bond strengths than middle ones in all groups (P < 0.05). The highest bond strength values were obtained from NaOCl/EDTA and the lowest bond strength values were obtained from NaOCl for both regions.
authors.affiliation: Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, University of Gazi, Emek, Ankara, Turkey.
authors.forename: Hacer Deniz
authors.initials: HD
authors.lastname: Arisu
authors.forename: Bağdagül Helvacioğlu
authors.initials: BH
authors.lastname: Kivanç
authors.forename: Baran C
authors.initials: BC
authors.lastname: Sağlam
authors.forename: Eser
authors.initials: E
authors.lastname: Şimşek
authors.forename: Güliz
authors.initials: G
authors.lastname: Görgül
mesh_terms: D001641:Bicuspid; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D017267:Dental Prosthesis Design; D003786:Dental Pulp Cavity / Q000473:pathology / Q000528:radiation effects; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000473:pathology / Q000528:radiation effects; D004492:Edetic Acid / Q000627:therapeutic use; D005898:Glass / Q000737:chemistry*; D006801:Humans; D054023:Lasers, Semiconductor / Q000627:therapeutic use; D028022:Low-Level Light Therapy / Q000295:instrumentation; D008855:Microscopy, Electron, Scanning; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry; D012388:Root Canal Irrigants / Q000627:therapeutic use; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods*; D016369:Smear Layer; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D013314:Stress, Mechanical; D013499:Surface Properties; D019553:Tooth, Nonvital / Q000628:therapy*
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D019279:Resin Cements; D012388:Root Canal Irrigants; C009753:fiberglass; D004492:Edetic Acid; D012973:Sodium Hypochlorite