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Validity and Reliability of the 3D Digital Models of Full Dentition Got by Spiral CT and Cone Beam CT

Author: YangLeiNing
Tutor: ZhangShaoFeng
School: Fourth Military Medical University
Course: Clinical Stomatology
Keywords: Spiral CT Cone-beam CT Edentulous Three-dimensional digital model
CLC: R816.98
Type: Master's thesis
Year: 2011
Downloads: 94
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Abstract


How accurate clinical, convenient access to the three-dimensional shape of the patient's teeth and dentition data, is an important topic of study Stomatology, mainly through the method of measurement of isolated teeth or plaster model, along with computer modeling techniques and image the continuous development of learning tools, provides a new method for the research projects. Can be used to establish the in vivo the edentulous 3D digital model and imaging method for the morphological data for spiral CT and cone beam CT (CBCT), and the present, the use of these two imaging methods to establish a three-dimensional digital model of the edentulous and less access to the morphological data, no reports about through angle measurement method this edentulous digitized model validity and reliability study. 11 measurement items of this study were used spiral CT and CBCT 10 young volunteers, the three-dimensional digital model of edentulous mandibles, and its line distance and angle measurements of the system, both from a qualitative and quantitative test them online distance and angle measurement validity and reliability, and thus the possibility of using these two imaging means accurate and quick establishment of a three-dimensional digital model of patients with full dentition and to provide certain guiding significance for its three-dimensional morphological data, explore damage patients suitable for clinical, accurate, and convenient to establish the patients dentition dimensional digital model and get the best imaging method for the morphological data. The results: 1.1 impression the preparation of the plaster model of edentulous cusp edge ridge, clear pit and fissure morphology, crown intact, the shape high point is clear. 1.2 impression Preparation dentition plaster model line distance and angle measurements are high reliability, the reliability test of the smallest p values ??were 0.143 and 0.215, the maximum mean difference-0.06mm and 0.67 °, respectively. 2.1 helical CT built edentulous cusp of the digital model, cutting edge, pit and fissure morphology was acceptable, but the crown buccolingual edge defect shape not clear highs. 2.2 helical CT built in edentulous digital model line distance and angle measurements were higher reliability, reliability testing smallest p-value of 0.106 and 0.141, the maximum mean difference of 0.09mm and 0.23 °, respectively. 2.3 helical CT built edentulous digital model line distance and angle measurement validity Validity minimum p-value of 0.076 and 0.110, respectively, the maximum mean difference of 0.16mm and 0.41 °, respectively. 3.1 CBCT built full dentition digitized model established in edentulous compared with spiral CT digital model finer cusp, cutting edge, pit and fissure patterns more clearly, crowns edge intact clear appearance highs. 3.2 CBCT built edentulous digital model line distance and angle measurements were higher reliability, reliability test the smallest p-value of 0.149 and 0.124, respectively, the maximum mean difference-0.07mm and -0.12 °, respectively. 3.3 CBCT built edentulous digital model line distance and angle measurement validity Validity minimum p-value of 0.113 and 0.276, respectively, the maximum mean difference of 0.08mm and 0.21 °, respectively. 3.4 impression of the preparation of the full dentition plaster model built with spiral CT method and CBCT edentulous digital model line distance and angle measurements were higher reliability; online distance measurements plaster model (maximum mean difference of absolute value 0.06mm) optimal, CBCT establish the full dentition digitized model (the largest absolute mean difference 0.07mm), followed by the absolute value of the digitized model of the spiral CT edentulous (maximum mean difference 0.09 mm) optimal third; (maximum mean difference of the absolute value of CBCT establish full dentition digital model in terms of angle measurement, 0.12 °), digital model of the spiral CT edentulous (the absolute value of the maximum mean difference of 0.23 °) of plaster model (maximum mean difference absolute value is 0.67 °) of again. The absolute value of the maximum mean difference of 3.5 spiral CT method and CBCT build digital models of edentulous validity of the measurements were higher; CBCT established edentulous digital models and plaster model line distance and angle measurements were 0.08mm and 0.21 °, the absolute value of the mean difference measured by the distance and angle of the spiral CT edentulous digital models and plaster model line of 0.16mm and 0.41 ° CBCT establish full dentition digital model line distance and angle measurements validity are better than a digital model of the spiral CT edentulous. Conclusion: The impression Preparation dentition plaster model line distance measurement optimal reliability, optimal the CBCT method to build three-dimensional digital model of edentulous angle measurement reliability; the edentulous 3D spiral CT method and CBCT built digitized distance and angle measurement validity of model line were higher; the CBCT method to build the edentulous 3D digital model line distance and angle measurement of validity and reliability are superior to the three-dimensional digital model of the spiral CT method to build full dentition; prompt us The validity and reliability of the CBCT method to build the edentulous 3D digital model line distance and angle measurements were higher; CBCT to play digital model advantages and build a better imaging methods vivo edentulous crown three-dimensional digital model.

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CLC: > Medicine, health > Of Medical > Radiation Medicine > Each location and course of disease X - ray diagnosis and therapy > Dental
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