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You searched for id:"oai:etd.ohiolink.edu:osu1553782462280014". One record found.

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The Ohio State University

1. Srinivasan, Soorya. Reliability and Accuracy of Assessing TAD - Tooth Root Contact using CBCT.

Degree: MS, Dentistry, 2019, The Ohio State University

Objective: Use of Temporary Anchorage Devices (TADs) for skeletal anchorage has foundprofound applications in the field of Orthodontics. Small field-of-view Cone BeamComputed Tomography (CBCT) imaging has been used clinically to evaluate TADplacement regarding its proximity to adjacent tooth roots.The objective of this study was to investigate the reliability and accuracy of CBCT basedassessment of TAD –tooth root proximity depending on the presence of metal brackets,choice of software programs and color enhancement techniques.Methods: Mandibles collected from 18 fresh pig cadavers were used. In each halfmandible, a TAD (Vector 1.4 x 8 mm) was placed at the buccal intermolar alveolar bone.With all soft tissue kept intact, each mandible underwent CBCT scans (Planmeca Promax3D machine, (90kVp, 12.5mA, and 400um voxel size) before and after placing TADs, aswell as after placing metal brackets on involved molars. Alveolar bone specimenscontaining the TADs were then separated from adjacent bone, TAD carefully removed andexposed to micro-CT scans, (Skyscan 1172, 100kV, 100uA, 27um voxel size).Subsequently, two independent raters, blinded of image identity, diagnosed whether theTAD was in contact with adjacent roots and measured the shortest TAD – root distanceusing ImageJ for microCT, and Dolphin and Anatomage (with and without colorenhancement) softwares for CBCT images. Intra-rater, inter-rater reliability, and theagreement between CBCT and microCT (gold standard) diagnoses were assessed byCohen’s kappa tests. Intra-rater, Inter-rater reliability of TAD – root distance were assessedwith ICC. One way repeated measures ANOVA was used to assess variances betweenraters, imaging software programs, presence/absence of metal brackets, CBCT and micro-CT measurements.Results: Interrater reliability for categorical diagnosis of TAD – root contact was perfectfor microCT images (kappa=1), followed by CBCT diagnosis made in Anatomage(kappa=0.85) and Dolphin (kappa=0.536). The presence of brackets increased CBCTdiagnostic reliability made in Anatomage (kappa: 0.85 to 0.93) but decreased it inDolphin (kappa: 0.536 to 0.113) Intrarater reliability of categorical diagnosis showedsimilar trend. Overall, kappa was strong for analysis with Anatomage and weak for thoseanalysis done using Dolphin. Analysis made with Dolphin in the presence of brackets andusing color enhancement of Anatomage had minimal to no reliability.The diagnostic accuracy of CBCT images compared to micro CT showed no agreementirrespective of the raters, presence of metal brackets or imaging software used.Quantitative measurements made using Anatomage software were more reliable betweenand within raters, but Dolphin measurements matched micro CT measurements moreclosely. Measurements made in Anatomage overestimated the TAD – root distance, thusindicating a greater penetration of TADs into the root with its use.Conclusions: Despite reasonable or even good intra and inter-rater reliability, thecategorical diagnoses of TAD-root proximity made from clinically used CBCT… Advisors/Committee Members: Sun, Zongyang (Advisor).

Subjects/Keywords: Dentistry; CBCT, TADs, diagnostic reliability, diagnostic accuracy, alveolar bone

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APA (6th Edition):

Srinivasan, S. (2019). Reliability and Accuracy of Assessing TAD - Tooth Root Contact using CBCT. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1553782462280014

Chicago Manual of Style (16th Edition):

Srinivasan, Soorya. “Reliability and Accuracy of Assessing TAD - Tooth Root Contact using CBCT.” 2019. Masters Thesis, The Ohio State University. Accessed September 21, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1553782462280014.

MLA Handbook (7th Edition):

Srinivasan, Soorya. “Reliability and Accuracy of Assessing TAD - Tooth Root Contact using CBCT.” 2019. Web. 21 Sep 2019.

Vancouver:

Srinivasan S. Reliability and Accuracy of Assessing TAD - Tooth Root Contact using CBCT. [Internet] [Masters thesis]. The Ohio State University; 2019. [cited 2019 Sep 21]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1553782462280014.

Council of Science Editors:

Srinivasan S. Reliability and Accuracy of Assessing TAD - Tooth Root Contact using CBCT. [Masters Thesis]. The Ohio State University; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1553782462280014

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