The Accuracy of Indirect Measuring Method on Dental Digital Models
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Abstract
Objective: Comparing the accuracy of the indirect measuring method on dental digital model by computer software with the direct measuring on plaster model by digital caliper.
Materials and methods: Thirty standardized plaster models were fabricated and scanned for 3D digital models by 3Shape D810TM laser scanner. Six horizontal distances (X1, X2, X3, X4, Z1 and Z2) and four vertical distances (Y1, Y2, Y3 and Y4) on digital and plaster models were measured by computer based and directed hand-held caliper measurements method, respectively. The intra and inter reliability of the examiners were assessed by Pearson’s correlation test (r>0.7). The accuracy of the direct and indirect measurements was tested by student’s T-test (α=0.05).
Results: The X1 distance showed no statistically significant (p=0.32) while the remaining (X2, X3, X4, Z1, Z2, Y1, Y2, Y3 and Y4) were significantly different (α<0.05).
Conclusion: The measurement on digital model by indirect method results in statistical difference, but it is in the range of clinically accepted compared to the direct measurement by digital caliper which classified as a gold standard.
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References
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