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Marginal Vertical Fit along the Implant-Abutment Interface: A Microscope Qualitative Analysis
Nicola Mobilio1, Alberto Fasiol2, Giulio Franceschetti3
1Department of Prosthodontics, Dental School, Dental Clinic, University of Ferrara, Ferrara 44121, Italy. mblncl@unife.it.
Dentistry Journal
|March 23, 2018
Summary
The study found that the manufacturing tolerance for computer-aided-design/computer-aided-machine (CAD/CAM) screw-retained crowns significantly impacts their marginal vertical fit. Precise tolerance control is crucial for optimal implant-abutment interface adaptation.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- Accurate marginal vertical fit of implant-supported prostheses is critical for long-term success.
- Computer-aided-design/computer-aided-machine (CAD/CAM) technologies offer customized solutions for implant restorations.
- Understanding the influence of manufacturing tolerances on fit is essential for optimizing CAD/CAM workflows.
Purpose of the Study:
- To qualitatively evaluate the marginal vertical fit of implant-abutment interfaces.
- To compare the fit of standard abutments versus CAD/CAM customized screw-retained crowns.
- To investigate the effect of manufacturing tolerance on the fit of CAD/CAM crowns.
Main Methods:
- Qualitative analysis of marginal vertical fit using an optical microscope.
- Comparison of four groups: standard titanium abutment, and three CAD/CAM screw-retained crowns with varying tolerances (0, +1, -1).
- Evaluation of implant-abutment interfaces under standardized conditions.
Main Results:
- A significant vertical gap was observed between CAD/CAM 0 and CAD/CAM -1 groups.
- No significant difference in vertical gap was found between the standard abutment and CAD/CAM +1 groups.
- The manufacturing tolerance set for CAD/CAM screw-retained crowns directly influences the marginal vertical fit.
Conclusions:
- The set tolerance in producing CAD/CAM screw-retained crowns plays a key role in achieving optimal marginal vertical fit.
- Careful control of manufacturing tolerances is necessary for predictable and accurate implant restorations.
- Further research may explore quantitative analysis and clinical implications of varying tolerances.
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