Document Type
Article
Publication Date
Spring 4-2024
Abstract
Objective: This study evaluated the effect of layer thickness, model inner structure, and im- plant 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 den- tal prosthesis were 3D printed. Models were divided into 2 groups (n=63) according to posterior implant angulation (Group 1; 30 ̊ and group 2;45 ̊). The models were then divided into three sub- groups (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 refer- ence model STL file.
Results: Both inner structure and layer thickness had a significant effect on the final accu- racy (p<0.001). Distal implant angulation had no effect on the final accuracy of the printed model (p=0.968). 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) layer thickness. As for model form, tukeys post hoc test revealed that the solid (24.9 ± 1.4) and honey- comb (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.
Clinical relevance: Printing layer thickness of 100 to 150 μm with a solid or honeycomb model inner form will provide the best 3D positional accuracy for implant analogs
Recommended Citation
Elsergany, Omar, "EFFECT OF LAYER THICKNESS, INNER STRUCTURE, AND IMPLANT ANGULATION ON THE ACCURACY OF 3D PRINTED MODELS WITH IMPLANT ANALOGS" (2024). Dentistry. 415.
https://buescholar.bue.edu.eg/dentistry/415
