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Three-dimensional Surface Changes in the Mandible during Growth and Development
Viechnicki, Bryon Joseph
Viechnicki, Bryon Joseph
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Thesis/Dissertation
Date
2011
Advisor
Tuncay, Orhan C.
Committee member
Sciote, James J.
Yang, Jie
Yang, Jie
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Department
Oral Biology
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DOI
http://dx.doi.org/10.34944/dspace/3733
Abstract
Three-dimensional analysis of mandibular growth provides the potential for pedodontists, orthodontists and surgeons to prescribe treatment that works in harmony with the individual growth of the patient. Despite efforts by 3D pioneers, the visualization of growth and development remains reminiscent of the landmark-based cephalometric analyses used in two-dimensional studies. The objective of this study was to identify 3D topographical changes of the mandible during growth and development of adolescent orthodontic patients. Nine pairs of pre- and post-orthodontic cone-beam computed tomography (CBCT) scans were used to generate mandibular surfaces. Surfaces were superimposed on trabecular bone in the anterior mandible using a mutual information algorithm, and topographical changes were visualized and quantified. The intra- and inter-rater intraclass correlation coefficients for surface generation (0.94 and 0.93, respectively) and superimposition (0.96 and 0.82, respectively) demonstrate the reliability of the techniques. The findings of this study support the theories of bone remodeling reported in histological, implant-based, and landmark studies of mandibular growth.
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