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Micro-CT Evaluation of Microgaps at Implant-Abutment Connection
Jakub Kowalski1, Adam K Puszkarz2, Mateusz Radwanski3
1Department of General Dentistry, Medical University of Lodz, 92-213 Lodz, Poland.
Materials (Basel, Switzerland)
|June 28, 2023
Summary
Microgaps at the implant-abutment interface were evaluated. Most Astra and Apollo abutments showed no clinically significant microgaps, though Apollo had slightly larger and more variable gaps.
Area of Science:
- Biomaterials Science
- Dental Implantology
- Microscopy and Imaging
Background:
- Microgaps at the implant-abutment interface can impact dental implant success.
- Evaluating these microgaps is crucial for ensuring long-term clinical outcomes.
Purpose of the Study:
- To compare the size and volume of microgaps between prefabricated (Astra) and customized (Apollo) abutments on standard implants.
- To assess the clinical acceptability of observed microgaps.
Main Methods:
- Micro-computed tomography (MCT) was used to measure microgaps.
- 24 microsections per sample were analyzed at four interface levels.
- Microgap volume was also evaluated.
Main Results:
- Microgap sizes ranged from 0.1 to 3.7 µm (Astra) and 0.1 to 4.9 µm (Apollo).
- 90% of Astra and 70% of Apollo specimens had no detectable microgaps.
- Higher mean microgap sizes were found at the lower abutment portion for both groups.
Conclusions:
- Most tested abutments exhibited no clinically significant microgaps.
- Linear and volumetric microgap dimensions were comparable between Astra and Apollo abutments.
- While Apollo abutments showed slightly larger and more variable microgaps, all were clinically acceptable.
