Two-part implant abutments with titanium and ceramic components: Surface modification affects retention forces-An
Nadine Freifrau von Maltzahn1, Sebastian Bernard2, Philipp Kohorst1,3
1Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Hannover, Germany.
Clinical Oral Implants Research
|June 24, 2019
Summary
Surface treatments and luting agents significantly impact the retention of two-part implant abutments. Lithium disilicate ceramic copings demonstrate retention forces comparable to zirconia, offering promising clinical applications.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- Two-part abutments, comprising a titanium base and ceramic coping, are crucial for dental implant success.
- Mechanical stability, particularly retention forces, is paramount for the long-term performance of these abutments.
Purpose of the Study:
- To investigate the retention forces of two-part implant abutments.
- To evaluate the influence of different ceramic materials (zirconia and lithium disilicate), surface treatments, and resin-based luting agents on abutment retention.
Main Methods:
- Seventy test specimens with seven surface modification and three luting agent combinations were analyzed.
- Titanium bases underwent aluminum oxide blasting, with or without primers. Ceramic copings were sandblasted, acid-etched, or primed.
- Specimens were thermally aged (10^4 cycles, 5°C/55°C), and retention forces were measured via pull-off tests.
Main Results:
- The lowest retention was observed in titanium bases without mechanical pretreatment.
- The combination of titanium bases with Monobond plus primer yielded the highest pull-off forces for both zirconia and lithium disilicate ceramic copings.
Conclusions:
- Surface modifications and resin-based luting agents play a significant role in the retention of two-part implant abutment components.
- Lithium disilicate ceramic copings achieved retention results comparable to conventionally used zirconia copings.
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