Effect of eugenol-based endodontic sealer on the adhesion of intraradicular posts cemented after different periods.
OBJECTIVE
This study evaluated in vitro the influence of an eugenol-based sealer (EndoFill) on the retention of stainless steel prefabricated posts cemented with zinc phosphate and resin-based (Panavia F) cements after different periods of root canal obturation, using the pull-out test.


METHODS
Sixty upper canines were decoronated and the roots were embedded in resin blocks. The specimens were distributed into 3 groups, according to the period elapsed between canal obturation and post cementation: Group I - immediately; Group II - 72 h and Group III - 4 months. The groups were subdivided according to the type of cement used for post cementation: A - zinc phosphate and B - Panavia F. Following the experimental periods, specimens were subjected to pullout test in an Instron machine with application of tensile force at a crosshead speed of 0.5 mm/min until post dislodgement. The maximum forces required for post removal were recorded (kN) and means were subjected to statistical analysis by 2-way ANOVA and Tukey-Kramer test (alpha=0.001)


RESULTS
There were statistically significant differences (p<0.01) between the posts cemented with zinc phosphate cement (0.2112 kN) and Panavia F (0.0501 kN). However, no statistically significant differences (p>0.05) were found between the three post cementation periods, regardless of the cement.


CONCLUSIONS
It was concluded that the eugenol-based sealer influenced the tensile strength of the posts cemented with the resin cement, but had no influence on the time waited between root canal obturation and post space preparation/post cementation.
Dias
Larissa Lustosa Lima
LL
Department of Dentistry, University of Ribeirão Preto, SP, Brazil.
Giovani
Alessandro Rogério
AR
Silva Sousa
Yara Teresinha Corrêa
YT
Vansan
Luiz Pascoal
LP
Alfredo
Edson
E
Sousa-Neto
Manoel Damião
MD
Paulino
Silvana Maria
SM
D002484:Cementation / Q000379:methods*; D003481:Cuspid / Q000473:pathology; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003799:Dental Stress Analysis / Q000295:instrumentation; D006801:Humans; D008422:Materials Testing; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation; D018915:Root Canal Preparation; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors; D019553:Tooth, Nonvital / Q000473:pathology; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry*; D015036:Zinc Phosphate Cement / Q000737:chemistry
D003722:Dental Alloys; C438843:Panavia-Fluoro; D019279:Resin Cements; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C074417:Endo-Fill; D013193:Stainless Steel; D015036:Zinc Phosphate Cement