Beschreibung
The aim of the present study was to investigate the transfer accuracy of the digital and conventional impression of the entire jaw in subjects of different ages and dentition.
Therefore, an established method was used for a clinical examination in order to figure out to what extent differences in the accuracy of digital and conventional impressions in different age groups as well as in fully and partially edentulous subjects make.
Using an established reference method, three different groups of subjects (eugnath den-tition; elderly patients over fifty years of age with periodontally damaged dentition and gingival recession, tooth tilts and undercuts; group of subjects over fifty years of age with gaps in the mandible as well as with damaged dentition) were scanned with five different intraoral scanners and then conventional impressions were taken.
The results showed no significant differences between the three groups of subjects. The dentition and age of the test subjects had no significant influence on the transfer accura-cy of the digital impression examined. Only two intraoral scanners (Trios 4; Primescan) showed smaller deviations with significant differences for some distances compared to the other intraoral scanners. The conventional impression showed the highest accuracy in all groups and partly significant differences in the longer distances.
In summary, the data obtained in the present clinical study show that the oral situation in terms of age or dentition has no significant influence on the digital or conventional impression. Nevertheless, conventional impressions continue to show the highest accura-cy despite further development of intraoral scanners.
