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, Pages 1567-1575 PDF (632.03 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/edj.2024.260280.2860 | ||
| Authors | ||
| Ingy Nouh* 1; Nancy Rafla1; Omar Ahmed El Sergany2 | ||
| 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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