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Load fatigue performance of implant-ceramic abutment combinations
Huong Q Nguyen1, Keson B Tan, Jack I Nicholls
1Dental Department, Alexandra Hospital, Singapore.
The International Journal of Oral & Maxillofacial Implants
|November 4, 2009
Summary
This study evaluated zirconia ceramic abutments under load fatigue, finding performance depends on abutment diameter. Failure modes varied by implant system design, highlighting the importance of diameter selection for dental implants.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Implant Dentistry
Background:
- Metal abutments for implant restorations are well-researched.
- The fatigue performance of novel ceramic implant abutments remains largely uninvestigated.
Purpose of the Study:
- To assess the load fatigue performance of zirconia ceramic abutments from four implant systems.
- To evaluate performance at manufacturer-recommended torque levels.
Main Methods:
- Ten implant-abutment groups were tested using three implant systems (Replace Select, Branemark, Osseotite NT/Certain) with varying diameters.
- Procera zirconia, Zireal, and Certain ZiReal abutments were subjected to rotational load fatigue (35 Ncm, 10 Hz) using a specialized machine.
- Sample size was five per group, with cycles to failure recorded.
Main Results:
- Twenty-nine out of 50 tested implant-abutment combinations failed.
- Abutment fractures (18), implant fractures (7), and abutment screw fractures (16) were observed.
- Significant differences in fatigue performance were noted between implant diameters, but not significantly between implant systems.
Conclusions:
- The load fatigue performance of zirconia abutments is significantly influenced by their diameter.
- Observed failure modes were system-design dependent, underscoring the need for careful material and design selection in dental implantology.
