The Effect of Angulation and Scan Body Position on Scans for Implant-Treated Edentulism: A Clinical Simulation Study

Area of Science:

• Dental technology
• Prosthodontics
• Digital dentistry

Background:

• Digital impressions are crucial in modern dentistry.
• Evaluating the accuracy of intraoral scanners for complex restorations is essential.

Purpose of the Study:

• To assess the accuracy of two intraoral scanners (Trios3 and CS3600) for digital impressions of maxillary full-arch implant-supported prostheses.
• To compare scanner performance under different implant angulation scenarios.

Main Methods:

• Two edentulous maxilla models with varying implant angulations were 3D-printed.
• Digital impressions were acquired using Trios3 and CS3600 intraoral scanners.
• Linear and angular deviations were measured to assess accuracy.

Main Results:

• Implant angulation significantly affected the accuracy of digital impressions.
• The CS3600 scanner showed superior trueness, while the Trios3 scanner demonstrated superior precision.
• Scan body position influenced outcomes, with the last scanned body showing higher deviations.

Conclusions:

• Both intraoral scanners provide acceptable accuracy for full-arch implant restorations.
• Clinicians should carefully consider implant angulation and scanning protocols for predictable results.
• Understanding factors affecting trueness and precision is key for successful digital impression acquisition.