title: Fracture resistance of direct inlay-retained adhesive bridges: effect of pontic material and occlusal morphology.
abstract: This study evaluated the effect of a) pontic materials and b) occlusal morphologies on the fracture resistance of fi ber-reinforced composite (FRC) inlay-retained fixed dental prostheses (FDP). Inlay-retained FRC FPDs (N=45, n=9) were constructed using a) resin composite (deep anatomy), b) natural tooth, c) acrylic denture tooth, d) porcelain denture tooth and e) resin composite (shallow anatomy), as pontic materials. In addition resin composite beams were fabricated (N=30, n=10): i) 'circular', ii) 'elliptic I', and iii) 'elliptic II'. There was no significant difference between the fracture resistance of Groups a, b, c, and d (598, 543, 539, 509 N, respectively) (p>0.05) (One-way ANOVA). Fracture resistance of Group e (1,186 N) was significantly higher than those of other groups (p<0.05) (Tukey's test). No significant difference was found between Group i (1,750 N) and Group ii (1,790 N). Not the pontic material but the occlusal morphology affects the fracture resistance of FRC FDPs.
authors.affiliation: University of Zürich, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zürich, Switzerland. mutluozcan@hotmail.com
authors.forename: Mutlu
authors.initials: M
authors.lastname: Ozcan
authors.forename: Marijn
authors.initials: M
authors.lastname: Breuklander
authors.forename: Esra
authors.initials: E
authors.lastname: Salihoglu-Yener
mesh_terms: D000180:Acrylic Resins; D000704:Analysis of Variance; D002484:Cementation; D003188:Composite Resins / Q000737:chemistry; D003766:Dental Occlusion; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D003779:Denture Design; D016379:Denture, Partial, Fixed, Resin-Bonded; D055119:Elastic Modulus; D006801:Humans; D007284:Inlays; D014093:Tooth, Artificial
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins; D003776:Dental Porcelain; C092420:Clearfil Photo Posterior