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Article
Validity of Digital and Rapid Prototyped Orthodontic Study Models

Authors: Faten F. Al-Samarrai فاتن فالح السامرائي --- Iman I. Al-Sheakli
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2017 Volume: 29 Issue: 3 Pages: 80-85
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The integration of modern computer-aided design and manufacturing technologies in diagnosis, treatment planning, and appliance construction is changing the way in which orthodontic treatment is provided to patients. The aim of this study is to assess the validity of digital and rapid prototyped orthodontic study models as compared to their original stone models.Materials and methods: The sample of the study consisted of 30 study models with well-aligned, Angle Class I malocclusion. The models were digitized with desktop scanner to create digital models. Digital files were then converted to plastic physical casts using prototyping machine, which utilizes the fused deposition modeling technology. Polylactic acid polymer was chosen as the printing material. Twenty four linear measurements were taken from digital and prototyped models and were compared to their original stone models “the gold standard”, utilizing the paired sample t-test and Bland-Altman plots.Results: Eighteen of the twenty four variables showed non-significant differences when digital models were compared to stone models. The levels of agreement between the two methods showed that all differences were within the clinically accepted limits. For prototyped models, more than half of the variables differed in non-significant amount. The levels of agreement were also within the clinically accepted limits.Conclusion: Digital orthodontic study models are accurate in measuring the selected variables and they have the potential to replace conventional stone models. The selected rapid prototyping technique proved to be accurate in term of diagnosis and might be suitable for some appliance construction


Article
Requirements validation techniques :A case of prototype of the Technical Institute for Administration

Author: Thamir Naeem Jassim ثامر نعيم جاسم
Journal: Journal of Al-Qadisiyah for Computer Science and Mathematics مجلة القادسية لعلوم الحاسوب والرياضيات ISSN: 20740204 / 25213504 Year: 2014 Volume: 6 Issue: 1 Pages: 1-10
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

requirements validation techniques (RVTs) play important role to detect possible defects in the requirements (functional, non-functional ). Prototypes are good way to demonstrate the requirements and help stakeholders discover problems. The key advantage of a prototyping-based methodology is that it very quickly provides a system for the users to interact with, even if it is not initially ready for widespread organizational use. The proposed web application has been tested based on the usability, System quality has a considerable effect on ease of use and does directly influence the users' intention to use the TIAS in the future. The analysis indicates that the attractiveness of the user interface, performance and the functionalities are critical success factors of TIAS acceptance. the mean of intention to use and ease of use are respectively 3.77 and 3.54 on a 5-point Likert scale. These results show that TIAS is well accepted in general.

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