Influence of proximal contacts and FRC posts on the fracture behavior of premolars with class II composite restorations: an in-vitro study.
The purpose of this study was to evaluate the influence of the number of proximal contacts and fiber-reinforced composite (FRC) post insertion on the fracture behavior of endodontically treated premolars with class II (MOD) cavities and direct composite restorations. Forty-eight single-rooted human premolars were endodontically treated and prepared with standardized MOD (mesio-occluso-distal) cavities. One-half of the teeth additionally received FRC-posts (DT Light SL) luted with Panavia F resin cement. All of the specimens were restored with direct composite restorations, and the teeth were embedded in proximal contact with either zero, one or two adjacent tooth-replicas. Eight sound premolars served as control. After thermomechanical ageing, the samples were loaded until fracture at an angle of 30°. The sound teeth showed the highest mean fracture load. Teeth with one or two proximal contacts and FRC-posts showed only statistically insignificantly lower values. All of the other groups had significantly lower values.
Department of Prosthetic Dentistry and Dental Materials Sciences, Dental School and Clinics, Saarland University.
Klaus-Peter
KP
Krug
Stephanie E
SE
Otter
Andreas W
AW
Knauber
Kurt-Juergen
KJ
Erdelt
Frank P
FP
Nothdurft
D001641:Bicuspid; D003793:Dental Restoration, Permanent; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D011176:Post and Core Technique; D014082:Tooth Fractures