فهرست نشریات علمی دسترسی آزاد ایران

Introduction: Accurate impressions are essential for implant restoration. Intraoral scanner (IOS) have become well-established for capturing digital impressions. The aim of this study was to evaluate the trueness and Precision of IOS in capturing implants position in a partially edentulous maxilla. Methods & Materials: Six implant analogs ( DIO Implant. UF ) in three maxillary acrylic models with Kennedy class 2 edentulousness (in canine, premelars, and molars area) were placed in three Groups A: 10 mm inter-implant distance (IID), B: 20 mm ID and C: 30 mm IID. After fixing the scan bodies, 10 digital impressions were recorded for each three models using IOS ( TRIOs 3Shape ). In addition, one scan per model was performed with the laboratory scanner ( Smart Optic activity 885 ), and STL (Standard Tessellation Language) files were collected. All files were analyzed using Geomagic Control software. Accuracy was assessed by comparing IOS data with high-precision laboratory scanner data and the repeatability of IOS within groups. Results: Inter-implant distance Reduced IOS trueness between all three groups significantly (p < 0.01). The accuracy was greatest at the 10 mm inter-implant distance through IOS. Mean IOS precision was higher in the 10 mm group, but this differences was not significant. Conclusion: Despite in vivo limitations, this study sho ws that larger inter-implant distances reduces IOS trueness and precision for space implant impressions, potentially affecting digital impression accuracy and prosthetic outcome.