Related Experiment Video
Updated: Oct 11, 2025
06:51
Measuring the Complete-arch Distortion of an Optical Dental Impression
Published on: May 30, 2019
7.7K
Accuracy of Original vs. Non-Original Abutments Using Various Connection Geometries for Single Unit Restorations: A
Naureen Rizvi1, Yasir Alyahya1,2, Ali Rizvi1
1Unit of Prosthodontics, UCL Eastman Dental Institute, London, United Kingdom.
Summary
Original abutments offer more predictable dental implant outcomes than non-original abutments. However, some non-original abutments with external connections show comparable fit and screw loosening resistance, potentially failing less catastrophically than those with internal connections.
Area of Science:
- Dental Implantology
- Biomaterials Science
- Prosthodontics
Background:
- Non-original abutments (NOAs) are widely used in dental implantology.
- Assessing the compatibility of NOAs with various implant connection types is crucial for predictable clinical outcomes.
- Understanding the performance differences between original and non-original components is essential for patient safety and treatment success.
Purpose of the Study:
- To investigate if dental implant connection type (internal vs. external) influences the compatibility of non-original abutments (NOAs).
- To determine if specific NOA and implant connection combinations can achieve compatibility comparable to original components.
- To evaluate the performance parameters of NOAs in relation to implant connection design.
Main Methods:
- A systematic literature search was performed across three major electronic databases (MEDLINE, Cochrane Library, Web of Science).
- Hand searching of relevant journals and grey literature supplemented the electronic search for studies published between 1995 and 2020.
- Data extraction focused on precision of fit, microleakage, micromotion, screw loosening, load capacity, fracture resistance, and in vivo outcomes.
Main Results:
- Original abutments generally demonstrated superior precision of fit, microleakage resistance, and fatigue strength compared to NOAs.
- Certain NOAs used with external implant connections showed comparable precision of fit and screw loosening resistance to original abutments.
- NOAs on external connections may be associated with fewer catastrophic failures than those on internal connections.
Conclusions:
- Original abutments provide more predictable outcomes across investigated parameters.
- External connections may offer a degree of compatibility with NOAs, potentially reducing failure severity compared to internal connections.
- Further laboratory and long-term in vivo studies are needed to fully elucidate the influence of connection geometry on NOA compatibility and clinical performance.
