ASSESSMENT OF ACCURACY OF SCANNABILITY AND THE EFFECT OF SURFACE ROUGHNESS ON POLYMETHYLMETHACRYLATE INTRA-ORAL SCAN BODY: IN VITRO STUDY | ||||
| Alexandria Dental Journal | ||||
| Articles in Press, Corrected Proof, Available Online from 16 July 2025 PDF (523.26 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/adjalexu.2025.342373.1568 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Zeyad hussein  1; mahmoud elsamahy2; Dawlat Mostafa3; Ingy Hassan 2
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| 1GTA College of Dentistry, The Arab Academy for Science and Technology and Maritime Transport (AASTMT), El-Alamein 51718, Egypt | ||||
| 2Department of Prosthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt. 21525, Egypt. | ||||
| 3Vice dean of educational affairs, College of Dentistry, The Arab Academy for Science and Technology and Maritime Transport (AASTMT), El-Alamein 51718, Egypt. | ||||
| Abstract | ||||
| Background: This study aims to create a cost-effective, custom-made intraoral scan body using digital dentistry techniques and to compare its scannability with that of a manufacturer-provided scan body. It also investigates the impact of surface roughness on scannability. Methods: An epoxy mandibular model with four dummy implants was utilized in this study, placed in canine-molar region. A total of ten manufacturer intraoral scan bodies (ISBs) were tightened and scanned with a bench scanner to (reference scan). Ten ISBs were 3D printed and another ten were milled. All groups underwent scanning with an intraoral scanner (MEDIT I 700), and the resulting scans were superimposed for comparison. The evaluation of 3D deviation and angular deviation was performed using Geomagic software. In a separate treatment group, specimens received sandblasting with 250 µm Al2O3 at a pressure of 0.3 MPa for 30 seconds from a distance of 5 mm. Results: The study found a significant difference in accuracy (trueness and precision) between the control group (manufacturer's ISBs) and the test groups (3D printed and milled), with a p-value of less than 0.05. The 3D-printed ISBs demonstrated superior accuracy compared to the milled ISBs. Additionally, significant differences were observed when comparing the mixed group (3D printed/milled) to the control group (p < 0.05). However, surface roughness did not significantly affect trueness and precision in either test group. Conclusions: The control group demonstrated superior accuracy compared to the two test groups. However, 3D printing yielded better results for trueness and precision than the milled group. | ||||
| Keywords | ||||
| custom made Implant scan body; intra-oral scanner; air-abrasion; Implant prosthesis | ||||
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