Comparison of regional bond strength in root thirds among fiber-reinforced posts luted with different cements.
OBJECTIVE
To compare regional bond strength in different thirds of the root canal, among glass fiber-reinforced (FRC) endodontic posts luted with different cements, using the push-out test.


METHODS
Sixty extracted human anterior teeth were endodontically treated with gutta-percha and AH Plus sealer. The crown portion was removed, and a dowel space was prepared. Prepared teeth were randomly assigned to one of six groups (n = 10) for luting glass FRC Postec posts, with one of the six cement systems (Ketac Cem Aplicap, Relyx Unicem Aplicap, Variolink II/Excite DCS, Panavia F/ED Primer, C&B cement/All-Bond 2, and Multilink/Multilink Primer A/B), using an alignment technique. Specimens were embedded in resin, and each root was sectioned into six 1-mm thick serial slices. A push-out test was performed to measure regional bond strengths and to identify the type of failure.


RESULTS
The highest bond strength values were found in the cervical third and the lowest in the apical third. Highest values were obtained using Variolink II, Panavia F, and Multilink resin cements followed by C&B resin cement and Relyx Unicem ionomer resin cement; Ketac-cem ionomer cement showed the lowest value.


CONCLUSIONS
Highest bond strength values were obtained in the cervical third and with resin cements.
de Durâo Mauricio
Paolo Joâo B T
PJ
Instituto Superior de Ciências da Saúde Egas Moniz, Campus Universitário--Quinta da Granja 2829-511 Monte Caparica, Lisboa, Portugal.
González-López
Santiago
S
Aguilar-Mendoza
José A
JA
Félix
Sergio
S
González-Rodríguez
María P
MP
D000328:Adult; D000368:Aged; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003786:Dental Pulp Cavity / Q000737:chemistry*; D003799:Dental Stress Analysis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019279:Resin Cements / Q000737:chemistry*; D018915:Root Canal Preparation
D003738:Dental Cements; C438843:Panavia-Fluoro; D019279:Resin Cements; C502351:multilink adhesive system; C103502:Variolink