Effect of implant situation andintra-oral scanners on the scan accuracy of multiple implants
Asst. Prof. Işıl Keçik Büyükhatipoğlu, Melek Özdemir, Assoc. Prof. Fatih Sarı
Objectives
The region of the implant and type of the intraora lscanner (IOS) may have an effect on the accuracy of intraoral scans.This study investigates the effect of IOS and FPD situation on the scan accuracy of three different located implants as anterior, premolar and molar regions
Materials and Methods
Bone and tissue leve limplan tanalogs were placed in a maxillary model as a central, first premolar and first molar sites as a tooth deficiency clinical statement.Reference standart tesselation language (STL) files of the models were generated by using an optica lscanner. Three IOS (Mediti700, Trios 3 andTrios 5) were used to perform partial-arc scans (test scans)of each model(n=10), which were exported in STL format.For each IOS's data set, the XYZ coordinates of the cylinders were obtained from the reference point and the deviations from the reference scanner were calculated using a 3D reverse engineering program (Geomagic Xsoftware). The trueness values were analyzed by One-way ANOVA test and Tukey’s HSD test
Results
There was a statistically significant difference between the intra-oral scanners in termsof RMS measurements (p:0.038; p<0.05). Scan precision was affected by the interaction between the IOSs and the implant situation when 3D distance were concerned. There was a statistically significant difference between the intraoral scanners in terms of molar measurements (p:0.007; p<0.05).
Conclusions
We concluded that the Trios 5 scanner had the highest reproducibility and accuracy in the clinical setting (p:0.005; p<0.05).