Fatigue resistance of 2 different CAD/CAM glass-ceramic materials used for single-tooth implant crowns.

Abstract

PURPOSE:

To evaluate the fatigue resistance of 2 different CAD/CAM in-office monoceramic materials with single-tooth implant-supported crowns in functional area.

MATERIALS AND METHODS:

A metal experimental model with a dental implant was designed to receive in-office CAD/CAM-generated monoceramic crowns. Laterally positioned axial dynamic loading of 300 N at 2 Hz was applied to implant-supported crowns machined from 2 different glass materials for 100,000 cycle. Failures in terms of fracture, crack formation, and chipping were macroscopically recorded and microscopically evaluated.

RESULTS:

Four of 10 aluminasilicate glass-ceramic crowns fractured at early loading cycles, the rest completed loading with a visible crack formation. Crack formation was recorded for 2 of 10 leucite glass-ceramic crowns. Others completed test without visible damage but fractured upon removal.

DISCUSSION:

Lack in chemical adhesion between titanium abutment and dental cement likely reduces the fatigue resistance of machinable glass-ceramic materials. However, relatively better fractural strength of leucite glass-ceramics could be taken into consideration. Accordingly, progress on developmental changes in filler composition of glass-ceramics may be promising.

CONCLUSION:

Machinable glass-ceramics do not possess sufficient fatigue resistance for single-tooth implant crowns in functional area.

• Authors: Yeliz Çavuşoğlu, Erdal Sahin, Riza Gürbüz, Kivanç Akça
• Journal: Implant dentistry (Implant Dent) Vol. 20 Issue 5 Pg. 374-8 (Oct 2011) ISSN: 1538-2982 [Electronic] United States
• PMID: 21881517 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Aluminum Silicates
• Dental Materials
• IPS-Empress ceramic
• Resin Cements
• Dental Porcelain
• leucite
• Cerec
• Variolink
• Glass ceramics
• Titanium

Topics

• Aluminum Silicates (chemistry)
• Ceramics (chemistry)
• Computer-Aided Design
• Crowns
• Dental Bonding
• Dental Implants, Single-Tooth
• Dental Materials (chemistry)
• Dental Porcelain (chemistry)
• Dental Prosthesis, Implant-Supported
• Dental Restoration Failure
• Dental Stress Analysis (instrumentation)
• Humans
• Materials Testing
• Microscopy, Electron, Scanning
• Models, Dental
• Resin Cements (chemistry)
• Stress, Mechanical
• Surface Properties
• Titanium (chemistry)