Titanium Scanbody Repeated Use for Complete-Arch Implant Impression: An In Vitro Accuracy Analysis
DOI:
https://doi.org/10.15517/gp392s78Keywords:
Scanbody; Repeated use; Wear; Complete-arch; Accuracy; Intraoral scanner.Abstract
The aim of the study was to assess the effect of titanium scanbody (Ti ISB) repeated use on the accuracy of complete-arch implant impression in vitro. A mandibular resin model with four conical connection implant analogues was digitized using an extraoral scanner to achieve a reference file. Thirty-eight test files were obtained with an intraoral scanner (IOS) and superimposed to the reference file. Screw-retained sand-blasted Ti ISB were screwed and unscrewed between each test scan. Implant positions (n=152) were analyzed through linear (∆X, ∆Y and ∆Z- axis) and angular deviations (∆ANGLE). Three-dimensional (3D) deviation was calculated as Euclidean distance (∆EUC) from the linear deviations. Effect of implant position was also calculated. A significative reduction of ∆EUC over time (p=0.001, b=-0.00099) was noticed, with position 4.5 as the least accurate with a significant difference compared to 3.2. Considering ∆ANGLE a significant reduction was noticed over time (p=0.041, b=-0.0031), with position 4.5 as the least accurate with a significant difference compared to 3.2 and 4.2. Conclusions: Ti ISBs repeated use didn’t show a significant negative effect on complete-arch IOS implant impression accuracy both in terms of angular and 3D deviation. Implant position showed a significant effect on accuracy with posterior tilted identified as most critical positions.
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