Effect of different intraoral scanners and scanbody splinting on accuracy of scanning implant‐supported full arch fixed prosthesis

Abstract

AbstractObjectiveThis study evaluated the accuracy of different intraoral scanners (IOS) for scanning of implant‐supported full arch fixed prosthesis with different implant angulations with and without scanbodies splinting.Materials and MethodsTwo maxillary models were designed and fabricated to receive an all‐on‐four implant retained. The models were divided into two groups according to the angulation of the posterior implant (Group 1; 30 and Group 2; 45). Each group was then divided into three subgroups according to the type of IOS used: Subgroup C; Primescan, subgroup T; Trios4, and subgroup M; Medit i600. Then each subgroup was divided into two divisions according to scanning technique; division S: splinted and division N: nonsplinted. Ten scans were made by each scanner for every division. Trueness and precision were analyzed using Geomagic controlX analysis software.ResultsAngulation had no significant effect on both the trueness (p = 0.854) and precision (p = 0.347). Splinting had a significant effect on trueness and precision (p < 0.001). Scanner type had a significant effect on trueness (p < 0.001) and precision (p < 0.001). There was no significant difference between trueness of Trios 4 (112.15 ± 12.85) and Primescan (106.75 ± 22.58). However, there was a significant difference when compared to trueness of Medit i600 (158.50 ± 27.65). For the precision results Cerec Primescan showed the highest precision (95.45 ± 33.21). There was a significant difference between the three scanners, precision of Trios4 (109.72 ± 19.24) and Medit i600 (121.21 ± 17.26).ConclusionCerec Primescan has higher trueness and precision than Trios 4 and Medit i600 in full arch implants scanning. Splinting the scanbodies improve the accuracy of full arch implants scanning.Clinical SignificanceCerec Primescan and 3Shape Trios 4 can be used for scanning of All‐on‐four implant supported prosthesis when scanbodies are splinted using a modular chain device.