Effect of Instrumentation Techniques, Irrigant Solutions and Artificial accelerated Aging on Fiberglass Post Bond Strength to Intraradicular Dentin.
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.
Department of Stomatologic Sciences, School of Dentistry Federal University of Goias, GO, Brazil.
Fernanda Ribeiro
FR
Santana
Department of Dental Materials and Operative Dentistry School of Dentistry, Federal University of Uberlandia, Uberlandia MG Brazil.
Carlos José
CJ
Soares
Department of Stomatologic Sciences, School of Dentistry Federal University of Goias, GO, Brazil.
Júlio Almeida
JA
Silva
Department of Stomatologic Sciences, School of Dentistry Federal University of Goias, GO, Brazil.
Ana Helena Gonçalves
AH
Alencar
Department of Stomatologic Sciences, School of Dentistry Federal University of Goias, GO, Brazil.
Sara Rodrigues
SR
Renovato
Department of Prevention and Oral Rehabilitation, School of Dentistry, Federal University of Goias, GO, Brazil.
Lawrence Gonzaga
LG
Lopes
Professor, Department of Stomatologic Sciences, School of Dentistry Federal University of Goias , Praca Universitaria s/n, Sector Universitario CEP: 74605-220 Goiania, GO, Brazil, e-mail: estrela3@terra.com.br.
Carlos
C
Estrela
D000818:Animals; D002417:Cattle; D002484:Cementation / Q000379:methods; D002710:Chlorhexidine / Q000627:therapeutic use; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D003786:Dental Pulp Cavity / Q000187:drug effects / Q000648:ultrastructure*; D003804:Dentin / Q000187:drug effects / Q000648:ultrastructure*; D004492:Edetic Acid / Q000627:therapeutic use; D005898:Glass / Q000737:chemistry*; D008422:Materials Testing; D009532:Nickel / Q000737:chemistry; D010126:Ozone / Q000627:therapeutic use; D011176:Post and Core Technique / Q000295:instrumentation*; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry; D012388:Root Canal Irrigants / Q000627:therapeutic use*; D018915:Root Canal Preparation / Q000295:instrumentation* / Q000379:methods; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014025:Titanium / Q000737:chemistry; D014867:Water / Q000737:chemistry
D003722:Dental Alloys; D003764:Dental Materials; D019279:Resin Cements; D012388:Root Canal Irrigants; C009753:fiberglass; D014867:Water; C040654:titanium nickelide; D013193:Stainless Steel; D010126:Ozone; D009532:Nickel; D004492:Edetic Acid; D014025:Titanium; D012973:Sodium Hypochlorite; D002710:Chlorhexidine
Aging; Bond strength; Fiberglass post; Irrigant; Root dentin