Comparison of clinical bracket point registration with 3D laser scanner and coordinate measuring machine

Dental press journal of orthodontics
Mahtab NouriReza Massudi

Abstract

The aim of the present study was to assess the diagnostic value of a laser scanner developed to determine the coordinates of clinical bracket points and to compare with the results of a coordinate measuring machine (CMM). This diagnostic experimental study was conducted on maxillary and mandibular orthodontic study casts of 18 adults with normal Class I occlusion. First, the coordinates of the bracket points were measured on all casts by a CMM. Then, the three-dimensional coordinates (X, Y, Z) of the bracket points were measured on the same casts by a 3D laser scanner designed at Shahid Beheshti University, Tehran, Iran. The validity and reliability of each system were assessed by means of intraclass correlation coefficient (ICC) and Dahlberg's formula. The difference between the mean dimension and the actual value for the CMM was 0.0066 mm. (95% CI: 69.98340, 69.99140). The mean difference for the laser scanner was 0.107 ± 0.133 mm (95% CI: -0.002, 0.24). In each method, differences were not significant. The ICC comparing the two methods was 0.998 for the X coordinate, and 0.996 for the Y coordinate; the mean difference for coordinates recorded in the entire arch and for each tooth was 0.616 mm. The accuracy of clinical bracke...Continue Reading

References

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Citations

Mar 7, 2019·The Angle Orthodontist·Sahar HaddadpourMahtab Nouri
Oct 16, 2019·Dental Materials Journal·Ivana Vlatkovic JakovljevicAleksandra Spadijer Gostovic

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