Comparative analysis of scanning techniques for edentulous jaws using the intraoral scanner

Abstract

Relevance. The intraoral scanner is a device that provides an alternative to traditional dental impressions. Intraoral scanners are effective even in complex clinical cases; however, their application in patients with complete edentulism remains challenging.

Objective. The study aims to evaluate the effectiveness of various scanning protocols for edentulous jaws using intraoral scanner.

Materials and methods. The study utilized the Pumpa intraoral scanner to scan edentulous jaw models (Frasaco B-3). A reference scan was obtained using the Medit T710 laboratory scanner. Three scanning techniques were applied: Three-point scanning technique: Maxilla – the average match rate with the laboratory scanner was 77.20%; Mandible – 72.46%. Rocking motion-based technique: Maxilla – the average match rate with the laboratory scanner was 86.56%; Mandible – 65.44%. The second scanning technique for the mandible proved to be the riskiest in terms of results, as its use yielded a scan with a match rate with the laboratory scanner only 56%, which is unacceptable for further treatment planning and prosthetic rehabilitation. Combined technique: Maxilla – average match rate with the laboratory scanner was 89.00%; Mandible – 87.11%.

Results. The combined scanning technique (third method) demonstrated the highest accuracy and is recommended for clinical use.

Conclusion. The combined scanning technique is the most precise and should be adopted in clinical practice for scanning edentulous jaws.