Fatigue resistance and failure mode of CAD/CAM composite resin implant abutments restored with type III composite resin and porcelain veneers.

Abstract

OBJECTIVES:

This study assessed the fatigue resistance and failure mode of type III porcelain and composite resin veneers bonded to custom composite resin implant abutments.

MATERIAL AND METHODS:

Using the CEREC 3 machine, 28 composite resin implant abutments (Paradigm MZ100) were fabricated along with non-retentive type III veneers, milled either in ceramic Paradigm C (n=14) or in composite resin Paradigm MZ100 (n=14). The intaglio surfaces of the veneers were hydrofluoric acid etched and silanated (Paradigm C) or airborne-particle abraded and silanated (MZ100). The fitting surface of the abutments was airborne-particle abraded, cleaned, silanated and inserted into a bone level implant (10 mm, BLI RC). All veneers were luted with adhesive resin (Optibond FL) and a preheated light curing composite resin (Filtek Z100). Cyclic isometric chewing (5 Hz, 30° angle) was simulated, starting with a load of 40 N, followed by stages of 80, 120, 160, 200, 240 and 280 N (20,000 cycles each). Samples were loaded until fracture or to a maximum of 140,000 cycles. Groups were compared using the life table survival analysis (Log rank test at P=0.05). Previously published data using same-design zirconia abutments were included for comparison.

RESULTS:

Paradigm C and MZ100 specimens fractured at an average load of 243 and 206 N (survival rate of 21% and 0%), respectively, with a significant difference in survival probability (P=0.02). Fractured specimens presented mixed failure modes and solely adhesive failures were not observed. The survival of composite resin abutments was similar to that of identical zirconia abutments from a previous study (P=0.76).

CONCLUSIONS:

Non-retentive porcelain veneers bonded to custom composite resin implant abutments presented a higher survival rate when compared with composite resin veneers. Survival of composite resin abutment did not differ from zirconia ones.

• Authors: Pascal Magne, Elisa Oderich, Luís Leonildo Boff, Antônio Carlos Cardoso, Urs Christoph Belser
• Journal: Clinical oral implants research (Clin Oral Implants Res) Vol. 22 Issue 11 Pg. 1275-81 (Nov 2011) ISSN: 1600-0501 [Electronic] Denmark
• PMID: 21985284 (Publication Type: Comparative Study, Journal Article)
• Copyright: © 2011 John Wiley & Sons A/S.

Chemical References

• Composite Resins
• Dental Implants
• Dental Materials
• OptiBond FL
• Resin Cements
• Silanes
• Z100 composite resin
• paradigm MZ100
• Dental Porcelain
• Silicon Dioxide
• Glass ceramics
• Zirconium
• Hydrofluoric Acid

Topics

• Acid Etching, Dental (methods)
• Bite Force
• Ceramics (chemistry)
• Composite Resins (chemistry)
• Computer-Aided Design
• Dental Abutments
• Dental Bonding
• Dental Etching (methods)
• Dental Implants
• Dental Materials (chemistry)
• Dental Porcelain (chemistry)
• Dental Prosthesis Design
• Dental Restoration Failure
• Dental Veneers
• Humans
• Hydrofluoric Acid (chemistry)
• Materials Testing
• Resin Cements (chemistry)
• Silanes (chemistry)
• Silicon Dioxide (chemistry)
• Stress, Mechanical
• Survival Analysis
• Zirconium (chemistry)