In vitro repair of all-ceramic and fibre-reinforced composite crowns.
Shear bond strength between fibre reinforced composite and all-ceramic frameworks and veneering/repair composites was investigated after different surface treatments for evaluating the possibility of a repair. Then, 24 crowns were adhesively luted on human teeth and artificially aged. Repair quality was characterized by a loading to fracture test, where undamaged crowns were compared to repaired crowns. To simulate repeated damage, aging and repair, the procedure was performed three times for each crown. A combined silicate-silane treatment of the fibre-reinforced composite frameworks and the hydrofluoric acid etching of the ceramic showed good repair qualities and a sufficient fracture strength for clinical application.
Rosentritt
M
M
Department of Prosthetic Dentistry, Hospital-University of Regensburg, Franz-Josef-Strauss Allee 11, D-93053 Regensburg, Germany. martin.rosentritt@klinik.uni-regensburg.de
Behr
M
M
Kolbeck
C
C
Lang
R
R
Handel
G
G
D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry; D019245:Compressive Strength; D003442:Crowns; D001840:Dental Bonding; D003776:Dental Porcelain; D017269:Dental Prosthesis Repair; D003799:Dental Stress Analysis; D005898:Glass; D006801:Humans; D018020:Lithium Compounds; D008422:Materials Testing; D011095:Polyethylenes; D018709:Statistics, Nonparametric; D013718:Tensile Strength
D003188:Composite Resins; C118557:Empress 2; C113550:FiberKor, sculpture; D018020:Lithium Compounds; D011095:Polyethylenes; C009753:fiberglass; D003776:Dental Porcelain