Influence of fabrication techniques on retention force of fiber-reinforced composite posts.
The purpose of this study was to compare the retention force of FRC posts which were built up using direct and direct-indirect fabrication techniques with two fiber-reinforced core build-up systems (FibreKor and i-TFC). Posts were cemented in endodontically treated bovine single roots with resin cement using either direct or direct-indirect technique. Following which, the retention force of post-and-cores and fracture sites were examined. It was found that both the retention force and fracture site depended on the fabrication technique and resin cements. Post-and-cores built up with direct-indirect technique had greater retention force than those fabricated using direct technique. Fracture modes most frequently observed were adhesive failure at Resin/Dentin interface, a mixture of adhesive failures at Post/Resin and Resin/Dentin interfaces as well as cohesive failure of resin cements. Based on the results of this study, we concluded that when it comes to post-and-core build-up for endodontically treated tooth, the direct-indirect technique is more effective than the direct technique on the retention force of FRC posts.
Nagase
Denis Yudi
DY
Department of Dental Materials Science, Tokyo Dental College, Chiba 261-8502, Japan.
Takemoto
Shinji
S
Hattori
Masayuki
M
Yoshinari
Masao
M
Kawada
Eiji
E
Oda
Yutaka
Y
D000704:Analysis of Variance; D000818:Animals; D001896:Boron Compounds; D002417:Cattle; D002484:Cementation / Q000379:methods; D003188:Composite Resins; D001840:Dental Bonding / Q000379:methods*; D017267:Dental Prosthesis Design / Q000379:methods*; D017268:Dental Prosthesis Retention; D003799:Dental Stress Analysis; D005898:Glass; D008422:Materials Testing; D008689:Methacrylates; D008768:Methylmethacrylates; D011176:Post and Core Technique; D019279:Resin Cements; D013718:Tensile Strength
D001896:Boron Compounds; D003188:Composite Resins; C113550:FiberKor, sculpture; C433207:Lute-It; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; C009753:fiberglass; C049495:Super-bond