Efficacy of a self-curing adhesive-resin cement system on luting glass-fiber posts into root canals: an SEM investigation.
OBJECTIVE
The aim of this study was to evaluate the efficacy of a new bonding-luting system in resin tag, adhesive lateral branch, and hybrid layer formation when used in combination with an experimental fiber post.


METHODS
Thirty anterior teeth extracted for periodontal reasons were selected for this study. They were endodontically treated and randomly divided into three groups of 10 samples each: group 1 = Excite light-cured bonding agent in combination with Variolink II resin cement; group 2 = Excite dual-cured bonding agent self-activated by an experimental microbrush in combination with MultiLink resin cement; and group 3 = one-step bonding system in combination with Dual Link resin cement. In groups 1 and 3, the primer-adhesive solution was light cured before placing the resin cement and the post, whereas in group 2 the adhesive/luting materials were not light cured. Twenty FRC Postec translucent posts (groups 1 and 2) and 10 EndoAesthetic translucent fiber posts (group 3) were used. One week later, the root samples were processed for scanning electron microscopic (SEM) observations.


RESULTS
Microscopic examinations of restored interfaces from group 2 revealed a resin-dentin interdiffusion zone higher than that seen in samples from groups 1 and 3 (P < .05). At the apical and middle thirds, the samples from group 2 showed significantly more resin tags than the other two groups.


CONCLUSIONS
The dual-cure self-activating system showed a more uniform resin tag and resin-dentin interdiffusion zone formation along root canal walls than light-curing systems.
Ferrari
M
M
Dental Materials Department, University of Siena, Italy. ferrarimar@unisi.it
Vichi
A
A
Grandini
S
S
Goracci
C
C
D000134:Acid Etching, Dental; D000269:Adhesives / Q000737:chemistry*; D000704:Analysis of Variance; D002484:Cementation / Q000295:instrumentation / Q000379:methods; D016009:Chi-Square Distribution; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003786:Dental Pulp Cavity / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D006801:Humans; D008027:Light; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry*; D012390:Root Canal Therapy; D018709:Statistics, Nonparametric; D013499:Surface Properties
D000269:Adhesives; C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C420130:Excite cement; D008689:Methacrylates; D019279:Resin Cements; C121818:Tetric ceram; C009753:fiberglass; C103502:Variolink