Nivine Ibrahim Ragy Youwakeim

12/02/2023

https://pubmed.ncbi.nlm.nih.gov/36788511/

Nivine Ibrahim Ragy Youwakeim

Ahmed Ghoneima, Ahmed Kaboudan, Wael Talaat, Christoph Bourauel

01/05/2019

Objective To assess validity and reliability of palatal superimposition of holograms of 3D digital dental models using a customized software, (Ortho Mechanics Sequential Analyzer OMSA), installed on Microsoft HoloLens device as compared to the OMSA application running on a regular computer screen. Methods The sample consisted of pre‐ and post‐treatment digital maxillary dental models of 20 orthodontic cases (12.3 ± 1.9 years) treated by rapid maxillary expansion (two turns per day). For each case, the pre‐ and post‐treatment digital models were superimposed using hand gestures for marking the dental models holograms in mixed reality using the Microsoft HoloLens. The same models were then superimposed using the conventional landmark‐based method with OMSA software running on a regular computer screen. The same set of dental arch parameters was measured on the superimposed 3D data by the two software versions for comparison. Agreement in the superimposition outcomes among the two superimposition methods was assessed using Dahlberg error (DE), concordance correlation coefficients (CCCs) using two‐way ANOVA mixed model for absolute agreement and Bland‐Altman analysis. Results Repeatability was acceptable for all variables based on the high values of CCCs over 0.99 with a lower 95% confidence limit over 0.95 for any variable. The DE ranged from 0.14 mm to 0.36 mm. The absolute error did not exceed 0.5 mm for any variable. Conclusion Using the depth vision capabilities of the Microsoft HoloLens, 3D digital dental models can be reliably superimposed allowing virtual assessment of orthodontic treatment outcomes.

Nivine Ibrahim Ragy Youwakeim

Ahmed Kaboudan, Christoph Bourauel, Katherine Kula, Ahmed Ghoneim

01/08/2017

Objective:To evaluate the validity and reliability of three-dimensional (3D) landmark-based palatal superimposition of digital dental models using Ortho Mechanics Sequential Analyzer (OMSA).Methods:The sample consisted of pre- and post-treatment digital maxillary dental models of 20 orthodontic cases. For each case, the pre- and post-treatment digital models were superimposed using surface-based methods utilizing 3dMD Vultus and Invivo 5 software as well as a landmark-based method utilizing OMSA. The same set of parameters were measured on the superimposed 3D data by the three softwares for comparison. Agreement in the superimposition outcomes among the three superimposition methods was evaluated with intraclass correlation coefficients (ICCs), Bland-Altman plots, and repeated measures ANOVA. A P value of ≤ 0.05 was considered statistically significant. Results: Repeatability was acceptable for all methods based on the ICCs. Agreement as measured by the ICCs and repeated measures ANOVA was high among the three methods.Conclusion:The results indicate that OMSA offers a valid and reliable tool for 3D landmark-based digital dental models superimposition using 3 points marked along the midpalatal raphe as reference.

Nivine Ibrahim Ragy Youwakeim

Ahmed Kaboudan, Hero Breuning, Tarek Elshebiny, Katherine Kula, Ahmed Ghoneima

01/02/2015

Introduction:The aim of this study was to evaluate the reliability of newly developed software in the assessment of orthodontic tooth movement 3 dimensionally. Methods:The sample consisted of pretreatment and posttreatment computed tomography scans and plaster dental models of 20 orthodontic patients treated with a hyraxpalatal expander as a part of their comprehensive orthodontic treatment. Dental-arch measurements,including arch widths, tooth inclinations, and angulation parameters, were measured on the scans using Invivo Dental 3D imaging software (version 5.1; Motionview, Hixson, Tenn). The plaster dental models were laser scanned and superimposed, and measurements were obtained digitally using the new software.Agreement between the digital models and the computed tomography measurements was evaluated with intra class correlation coefficients, paired t-tests, and Bland-Altman plots. A P-value of#0.05 was considered statistically significant.Results:High agreement, a nonsignificant paired t-test, and no indication of agreement discrepancies were observed for most of the measured parameters.Conclusions:The results confirmed that the new software program offers a reliable tool for dental-arch measurements obtained from 3-dimensional laser-scanned models.