An in vitro study on the adhesion of quartz fiber posts to radicular dentin.
OBJECTIVE
To evaluate in vitro the bond strength at the adhesive interface between a quartz fiber post, different adhesive systems, and different composite cements.


METHODS
Thirty extracted single-rooted teeth were endodontically treated and divided into three groups (n=10). Quartz fiber posts (DT Light-Post) were cemented with the following materials: group I: Prime & Bond NT + Self Cure Activator, and Calibra as luting cement; group II: Prime & Bond NT + Self Cure Activator, and UniFil Core; group III: UniFil Bond in combination with Unifil Core. The specimens were processed for the push-out test to evaluate bond strength at the root dentin-cement-post interface. They were sectioned along the long axis of the post into 1-mm-thick slices. A total of 60 sections was obtained from group I. Group II provided 67 slices, while group III provided 69. Loading was performed at a crosshead speed of 0.5 mm/min until the post segment was dislodged from the root section.


RESULTS
There was no statistically significant difference between the three experimental groups. The mean bond strength obtained for group I was 9.81 +/- 5.40 MPa. For group II it was 12.06 +/- 6.25 MPa, and 9.80 +/- 5.01 MPa for group III.


CONCLUSIONS
All the materials tested were similar in terms of providing satisfactory bond strength when used for luting fiber posts. However, Unifil Core may be advantageous since it can also be used as a core buildup material, which simplifies the clinical procedures.
Putignano
Angelo
A
Restorative Dentistry, Marche Polytechnic University, Ancona, Italy. aputi@tin.it
Poderi
Giada
G
Cerutti
Antonio
A
Cury
Alvaro
A
Monticelli
Francesca
F
Goracci
Cecilia
C
Ferrari
Marco
M
D000134:Acid Etching, Dental / Q000379:methods; D000704:Analysis of Variance; D001840:Dental Bonding; D017268:Dental Prosthesis Retention; D003786:Dental Pulp Cavity; D003799:Dental Stress Analysis; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D011176:Post and Core Technique; D011791:Quartz; D019279:Resin Cements; D018709:Statistics, Nonparametric
D017220:Dentin-Bonding Agents; D019279:Resin Cements; D011791:Quartz