Aims and Hypothesis: The objective of this study was the design and testing of a Prototype Computer Numerical Control (CNC) dental handpiece. We predicted that the CNC Prototype would be more accurate than the human participant prosthodontists in clinical simulation.
Materials and Methods: A Prototype CNC dental handpiece was developed from off the shelf components, assigned 100 typodont teeth (#18) for submission and 10 practice teeth. Single operator. Five prosthodontists, given 20 typodont teeth (#18) for submission and 10 for practice. Finished preparations were scanned with 3M True Definition® intraoral scanner outside of typodont, compared with Geomagic Control for RMSE.
Results: RMSE Prototype (N=100) was 0.40mm. RMSE Prosthodontists (N=100) was 0.55mm. One sided T test, mean difference −.15mm (p<.001, one sided CI −.09). One Way ANOVA (F stat <1, F=.526, p=.717), Spearman correlation Prototype RMSE vs order(ρ=.1, p=.334), RMSE vs Bur (ρ=.36, p<.001); For each prosthodontist individually (N=20) RMSE vs Order Prosthodontist 4(ρ=−.54, p= .015). Prosthodontist 5 (ρ= .58, p = .022). Prosthodontist 3 (ρ=.16, p=.498), Prosthodontist 2 (ρ=−.07, p=.772), and Prosthodontist 1 (ρ=−.08, p=.741) Spearman correlation (N=20) RMSE vs Bur Prosthodontist 5 (ρ= .51, p = .007), Prosthodontist 2 (ρ=.46, p= .040), Prosthodontist 4 (ρ=−.07, p=.758), Prosthodontist 3 (ρ=.18, p=.445), and Prosthodontist 1 (ρ=.43, p=.059)
Conclusion: CNC Prototype achieved superior results in clinical simulation, attained on a modest budget with a modest level of research support. Work should continue on the next iteration of a prototype to address some of the limitations of movement, feedback, and emotional acceptance of a machine performing treatment from the perspective of a patient.
|Commitee:||Del Castillo, Luis, Muftu, Ali, Saksena, Yun|
|School:||Tufts University School of Dental Medicine|
|School Location:||United States -- Massachusetts|
|Source:||MAI 55/06M(E), Masters Abstracts International|
|Keywords:||Accuracy, Computer numerical control, Crown preparation, Prosthodontist, Prototype|
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