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Effect of reusing impression posts and scan bodies on recording accuracy
Akin Aktas1, Taha Yasar Manav2, Mustafa Zortuk3
1Research Assistant, Department of Prosthodontics, Faculty of Dentistry, Hatay Mustafa Kemal University, Antakya, Hatay, Turkey.
The Journal of Prosthetic Dentistry
|March 7, 2025
Summary
Repeated sterilization and use of dental implant transfer components (ITCs) significantly increase inaccuracies in both conventional impressions and digital scans. Limit ITC reuse to maintain restoration accuracy.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Manufacturing Processes
Background:
- Frequent reuse and sterilization of dental implant transfer components (ITCs) may lead to material deformation.
- The impact of repeated use and sterilization on the accuracy of implant-supported restorations remains unclear.
Purpose of the Study:
- To evaluate the effects of repeated use and sterilization on the accuracy of ITCs.
- To determine the maximum acceptable number of reuses for ITCs before significant deformation occurs.
Main Methods:
- Compared accuracy of conventional impressions and digital scans using ITCs.
- Performed 10 repeated impressions/scans per component, with sterilization between cycles.
- Analyzed deviations using 3D software and statistical analysis (3-way mixed ANOVA).
Main Results:
- Significant increases in deviations were observed across all groups after repeated use and sterilization.
- Root Mean Square (RMS) deviations increased substantially in both conventional and digital groups.
- All observed increases in deviations were statistically significant (P<.05).
Conclusions:
- Repeated use and sterilization of ITCs cause significant deformation, compromising accuracy in both conventional and digital workflows.
- Limiting the number of ITCs reuses is crucial for maintaining high accuracy in implant-supported restorations.
