Effect of Instrumentation Techniques, Irrigant Solutions and Artificial accelerated Aging on Fiberglass Post Bond Strength to Intraradicular Dentin

• Published in: The journal of contemporary dental practice Vol. 16; no. 7; pp. 523 - 530
• Main Authors: Santana, Fernanda Ribeiro, Soares, Carlos José, Silva, Júlio Almeida, Alencar, Ana Helena Gonçalves, Renovato, Sara Rodrigues, Lopes, Lawrence Gonzaga, Estrela, Carlos
• Format: Journal Article
• Language: English
• Published: India 01-07-2015
• Subjects: Animals; Cattle; Cementation - methods; Chlorhexidine - therapeutic use; Dental Alloys - chemistry; Dental Bonding; Dental Materials - chemistry; Dental Pulp Cavity - drug effects; Dental Pulp Cavity - ultrastructure; Dentin - drug effects; Dentin - ultrastructure; Dentistry; Edetic Acid - therapeutic use; Glass - chemistry; Materials Testing; Nickel - chemistry; Ozone - therapeutic use; Post and Core Technique - instrumentation; Random Allocation; Resin Cements - chemistry; Root Canal Irrigants - therapeutic use; Root Canal Preparation - instrumentation; Root Canal Preparation - methods; Sodium Hypochlorite - therapeutic use; Stainless Steel - chemistry; Stress, Mechanical; Surface Properties; Time Factors; Titanium - chemistry; Water - chemistry; Aging; Bond strength; Fiberglass post; Irrigant; Root dentin
• ISSN: 1526-3711; 1526-3711
• DOI: 10.5005/jp-journals-10024-1716

To evaluate the effect of instrumentation techniques, irrigant solutions and specimen aging on fiberglass posts bond strength to intraradicular dentine.
A total of 120 bovine teeth were prepared and randomized into control and experimental groups resulting from three study factors (instrumentation techniques, irrigant solutions, specimen aging). Posts were cemented with RelyX U100. Samples were submitted to push-out test and failure mode was evaluated under a confocal microscope.
In specimens submitted to water artificial aging, nickel-titanium rotary instruments group presented higher bond strength values in apical third irrigated with NaOCl or chlorhexi-dine. Irrigation with NaOCl resulted in higher bond strength than ozonated water. Artificial aging resulted in significant bond strength increase. Adhesive cement-dentin failure was prevalent in all the groups.
Root canal preparation with NiTi instruments associated with NaOCl irrigation and ethylenediaminetetra acetic acid (EDTA) increased bond strength of fiberglass posts cemented with self-adhesive resin cement to intraradicular dentine. Water artificial aging significantly increased post-Clinical significance: The understanding of factors that may influence the optimal bond between post-cement and cement-dentin are essential to the success of endodontically treated tooth restoration.