Deproteinization technique stabilizes the adhesion of the fiberglass post relined with resin composite to root canal

• Published in: Journal of biomedical materials research. Part B, Applied biomaterials Applied biomaterials, 2012-02, Vol.100B (2), p.577-583
• Main Authors: Cecchin, Doglas, Almeida, José F. A., Gomes, Brenda P. F. A., Zaia, Alexandre A., Ferraz, Caio C. R.
• Format: Article
• Language: English
• Subjects: Animals; Biological and medical sciences; Cattle; chlorhexidine; Composite Resins - chemical synthesis; Composite Resins - chemistry; dental-bonding systems; durability; ethanol wet bonding; Glass - chemistry; Humans; Medical sciences; Root Canal Filling Materials - chemical synthesis; Root Canal Filling Materials - chemistry; root dentin; sodium hypochlorite; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases; Technology. Biomaterials. Equipments
• ISSN: 1552-4973; 1552-4981
• DOI: 10.1002/jbm.b.31946

To evaluate the effects of pretreatment of root dentin by 5.25% sodium hypochlorite (NaOCl) alone, associated with 2% chlorhexidine in gel base (CHX) and/or ethanol (EtOH), and the air‐drying technique (Air) on the bond strength and adhesive durability of fiberglass post relined with resin composite to root dentin. A total of 100 bovine incisor roots were divided into 10 groups: G1 (control), irrigation with physiologic solution; G2, Air; G3, NaOCl; G4, NaOCl + Air; G5, NaOCl + EtOH; G6, NaOCl + EtOH + Air; G7, NaOCl + CHX; G8, NaOCl + CHX + Air; G9, NaOCl + CHX + EtOH; G10, NaOCl + CHX + EtOH + Air. Fiberglass post relined with resin composite was cemented and each group was randomly divided into two subgroups: 24 h of water storage and 12 months of water storage. The push‐out test was performed and bond strength values were analyzed by ANOVA and Tukey's test. The use of NaOCl alone or associated with CHX had the highest values of bond strength with or without Air in the immediate and stored groups, being statistically similar to the immediate control group (p > 0.05). The groups using EtOH or Air alone had lower bond strength in the immediate and stored groups (p < 0.05). A significant decrease with the time of the bond strength in the control group was observed after 12 months of storage (p > 0.05). The use of NaOCl or NaOCl associated with CHX preserved the bond strength immediate and for 12 months. The air‐drying technique and the other associations decreased the immediate bond strength values. © 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 100B: 577–583, 2012.