Effect of two fiber post types and two luting cement systems on regional post retention using the push-out test.
OBJECTIVE
To investigate regional root canal push-out bond strengths for two fiber-reinforced post types using two adhesive systems.


METHODS
The crowns of 24 recently extracted sound maxillary central incisors were sectioned transversely 2 mm coronal to the labial cemento-enamel junction, and the roots treated endodontically. Following standardized post space preparations, fiber-reinforced posts (C-POST; AESTHETI-PLUS) were placed using two adhesive systems (acid-etch ONE-STEP PLUS/C&B CEMENT; self-adhesive RelyX Unicem), in four equal groups. Push-out bond strength tests were performed at four sites in each root. Results were analyzed using split-plot ANOVA, with a=0.05 for statistical significance.


RESULTS
AESTHETI-PLUS quartz fiber-reinforced posts showed significantly higher push-out strengths than C-POST carbon fiber-reinforced posts (P<0.0001). The separate acid-etch adhesive system resulted in significantly higher bond strengths than the self-etch self-adhesive system (P<0.0001). Bond strengths decreased significantly from coronal to apical root canal regions (P<0.0001).


CONCLUSIONS
The quartz fiber-reinforced post placed using the separate acid-etch adhesive system provided significantly better post retention than the carbon fiber-reinforced post placed using the self-etch self-adhesive system.
Wang
Vivian J-J
VJ
College of Stomatology, Nanjing Medical University, Nanjing, PR China.
Chen
Ya-Ming
YM
Yip
Kevin H-K
KH
Smales
Roger J
RJ
Meng
Qing-Fei
QF
Chen
Lijuan
L
D000134:Acid Etching, Dental / Q000379:methods; D000704:Analysis of Variance; D002244:Carbon; D000077482:Carbon Fiber; D002484:Cementation; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D017268:Dental Prosthesis Retention; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D006801:Humans; D007180:Incisor; D011176:Post and Core Technique; D011791:Quartz; D019279:Resin Cements
D000077482:Carbon Fiber; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C483701:Rely X Unicem; D019279:Resin Cements; D011791:Quartz; D002244:Carbon