A systematic review and meta-analysis of the accuracy of complete arch implant scanning techniques performed extraorally: Reverse impression and extraoral photogrammetry methods. Report of the Committ
9 hours ago
- #Implant Scanning
- #Dentistry
- #Prosthodontics
- Systematic review and meta-analysis on the accuracy of complete arch implant scanning techniques performed extraorally.
- Focus on reverse impression and extraoral photogrammetry (PG) methods.
- Accuracy of intraoral scanners (IOSs) decreases over longer spans, affecting passive fit of implant-supported frameworks.
- Reverse impression and extraoral PG introduced to overcome IOS limitations.
- 29 studies included: 3 on reverse impression, 26 on extraoral PG.
- Reverse impression accuracy varies but generally within clinically acceptable limits.
- Extraoral PG shows mean linear discrepancy of 27 µm and angular discrepancy of 0.21 degrees.
- Extraoral PG techniques deemed clinically acceptable for capturing implant positions.
- Preliminary data on reverse impression promising but requires more studies for clinical validation.