Effect of layer thickness, inner structure, and implant angulation on the accuracy of 3D printed models with implant analogs
Nouh, I., Rafla, N., El Sergany, O. (2024). Effect of layer thickness, inner structure, and implant angulation on the accuracy of 3D printed models with implant analogs. EKB Journal Management System, 70(2), 1567-1575. doi: 10.21608/edj.2024.260280.2860
Ingy Nouh; Nancy Rafla; Omar Ahmed El Sergany. "Effect of layer thickness, inner structure, and implant angulation on the accuracy of 3D printed models with implant analogs". EKB Journal Management System, 70, 2, 2024, 1567-1575. doi: 10.21608/edj.2024.260280.2860
Nouh, I., Rafla, N., El Sergany, O. (2024). 'Effect of layer thickness, inner structure, and implant angulation on the accuracy of 3D printed models with implant analogs', EKB Journal Management System, 70(2), pp. 1567-1575. doi: 10.21608/edj.2024.260280.2860
Nouh, I., Rafla, N., El Sergany, O. Effect of layer thickness, inner structure, and implant angulation on the accuracy of 3D printed models with implant analogs. EKB Journal Management System, 2024; 70(2): 1567-1575. doi: 10.21608/edj.2024.260280.2860

Effect of layer thickness, inner structure, and implant angulation on the accuracy of 3D printed models with implant analogs

Egyptian Dental Journal
Volume 70, Issue 2 - Serial Number 4, April 2024, Page 1567-1575  XML PDF (632.03 K)
Document Type: Original Article
DOI: 10.21608/edj.2024.260280.2860
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Authors
Ingy Nouh email orcid 1; Nancy Raflaorcid 1; Omar Ahmed El Serganyorcid 2
1Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt.
2Department of Fixed Prosthodontics, Faculty of Dentistry, British University in Egypt, Cairo, Egypt.
Abstract
Objective: This study evaluated the effect of layer thickness, model inner structure, and implant
angulation on the accuracy of 3D printed models with repositional analogs. Materials and
methods: 126 models designed to receive all-on-4 implant retained fixed dental prosthesis
were 3D printed. Models were divided into 2 groups (n=63) according to posterior implant
angulation (Group 1; 30 ᵒ and group 2;45 ᵒ). The models were then divided into three subgroups
(n=21) according to the printing layer thickness (Group a; 50 µm, group b; 100 µm, and group c;
150 µm). Each subgroup was later subdivided into 3 divisions (n=7) according to the model
inner structure (Group I; solid, group II; hollow, and group III; honeycomb). Trueness was
analyzed using Geomagic controlX analysis software by comparing the model scans to the
reference model STL file. Results: Both inner structure and layer thickness had a significant
effect on the final accuracy. Implant angulation had no effect on the final
accuracy of the printed model. Regarding layer thickness, tukeys post-hoc test
revealed that both 100 µm (24.9± 2.4) and 150 µm (24.5 ± 1.1) layer thickness showed higher
accuracy than the 50 µm (27.9 ± 2.4). As for model form, tukeys post hoc test
revealed that the solid (24.9 ± 1.4) and honeycomb (25 ± 1.5) models were more accurate than
the hollow models (27.5±3.3). Conclusion: Implant angulation had no effect on the final
accuracy of the model. Both 50 µm print layer thickness and hollow model inner structure
showed the least accuracy.
Keywords
Implant scan body; Digital dentistry; Digital impressions; implant analogs; Digital Analogs
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