Objective. This study compared tooth length measurements made on cone beam computed tomography (CBCT) scans and 3-Tesla (3T) magnetic resonance (MR) scans performed with and without an alginate bite registration surrounding the crowns of the teeth. Materials and Methods. One CBCT scan, one MR scan with alginate bite registration, and one MR scan without bite registration were performed on 12 subjects. The alginate bite registration was used to provide a proton-rich material to surround proton-poor teeth in an attempt to improve visualization of teeth. DICOM formatted images from each of the three scans for each subject were oriented in all three planes of space. Slices of 4 mm thickness were made through all permanent teeth. Tooth length measurements were made from the slices. Results. The presence of alginate bite registration during MR scans made it impossible to determine tooth lengths on MR images. Tooth lengths measured from CBCT and MR scans without alginate bite registration were very highly correlated. For 336 measurements (N = 336) the correlation coefficient was found to be 0.953 (p < 0.001). Conclusions. 1.) Alginate is not a useful material in increasing visualization of teeth on MR scans. 2.) Tooth length measurements made on MR scans are highly correlated with tooth length measurements made on CBCT scans.
","abstract_html":"<p>Objective. This study compared tooth length measurements made on cone beam computed tomography (CBCT) scans and 3-Tesla (3T) magnetic resonance (MR) scans performed with and without an alginate bite registration surrounding the crowns of the teeth. Materials and Methods. One CBCT scan, one MR scan with alginate bite registration, and one MR scan without bite registration were performed on 12 subjects. The alginate bite registration was used to provide a proton-rich material to surround proton-poor teeth in an attempt to improve visualization of teeth. DICOM formatted images from each of the three scans for each subject were oriented in all three planes of space. Slices of 4 mm thickness were made through all permanent teeth. Tooth length measurements were made from the slices. Results. The presence of alginate bite registration during MR scans made it impossible to determine tooth lengths on MR images. Tooth lengths measured from CBCT and MR scans without alginate bite registration were very highly correlated. For 336 measurements (N = 336) the correlation coefficient was found to be 0.953 (p < 0.001). Conclusions. 1.) Alginate is not a useful material in increasing visualization of teeth on MR scans. 2.) Tooth length measurements made on MR scans are highly correlated with tooth length measurements made on CBCT scans.</p>","abstract_has_math":false,"creators":["Taylor, Andrew Scott"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Thesis","degree_discipline":"Orthodontics and Dentofacial Orthopedics","degree_department":null,"school":null,"contributors":["Leggitt, V. Leroy","Farrage, James","Rynearson, R. David"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016-09-01T07:00:00Z","date_published":"2016-09-01T07:00:00Z","updated_at":"2026-07-24T02:52:45Z","subjects":["Dental Materials","Dentistry","Medicine and Health Sciences","Orthodontics and Orthodontology","Tooth - Radiography; Cone-Beam Computed Tomography; Magnetic Resonance Imaging; Imaging - three dimensional;","Alganite bite registration; Tooth length measurements; Dental Materials"],"languages":["English"],"rights":["This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarsrepository.llu.edu/etd/412","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Leggitt, V. Leroy","Farrage, James","Rynearson, R. David"]},{"key":"dc:creator","label":"Author","values":["Taylor, Andrew Scott"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Orthodontics and Dentofacial Orthopedics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Dental Materials","Dentistry","Medicine and Health Sciences","Orthodontics and Orthodontology","Tooth - Radiography; Cone-Beam Computed Tomography; Magnetic Resonance Imaging; Imaging - three dimensional;","Alganite bite registration; Tooth length measurements; Dental Materials"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarsrepository.llu.edu/etd/412"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Objective. This study compared tooth length measurements made on cone beam computed tomography (CBCT) scans and 3-Tesla (3T) magnetic resonance (MR) scans performed with and without an alginate bite registration surrounding the crowns of the teeth. Materials and Methods. One CBCT scan, one MR scan with alginate bite registration, and one MR scan without bite registration were performed on 12 subjects. The alginate bite registration was used to provide a proton-rich material to surround proton-poor teeth in an attempt to improve visualization of teeth. DICOM formatted images from each of the three scans for each subject were oriented in all three planes of space. Slices of 4 mm thickness were made through all permanent teeth. Tooth length measurements were made from the slices. Results. The presence of alginate bite registration during MR scans made it impossible to determine tooth lengths on MR images. Tooth lengths measured from CBCT and MR scans without alginate bite registration were very highly correlated. For 336 measurements (N = 336) the correlation coefficient was found to be 0.953 (p < 0.001). Conclusions. 1.) Alginate is not a useful material in increasing visualization of teeth on MR scans. 2.) Tooth length measurements made on MR scans are highly correlated with tooth length measurements made on CBCT scans.
"]},{"key":"dc:title","label":"Title","values":["Correlation of Tooth Length Measurements made on CBCT and 3T MR Images"]}]}],"canonical_facts":{"dc:contributor":["Leggitt, V. Leroy","Farrage, James","Rynearson, R. David"],"dc:creator":["Taylor, Andrew Scott"],"dc:description.abstract":["Objective. This study compared tooth length measurements made on cone beam computed tomography (CBCT) scans and 3-Tesla (3T) magnetic resonance (MR) scans performed with and without an alginate bite registration surrounding the crowns of the teeth. Materials and Methods. One CBCT scan, one MR scan with alginate bite registration, and one MR scan without bite registration were performed on 12 subjects. The alginate bite registration was used to provide a proton-rich material to surround proton-poor teeth in an attempt to improve visualization of teeth. DICOM formatted images from each of the three scans for each subject were oriented in all three planes of space. Slices of 4 mm thickness were made through all permanent teeth. Tooth length measurements were made from the slices. Results. The presence of alginate bite registration during MR scans made it impossible to determine tooth lengths on MR images. Tooth lengths measured from CBCT and MR scans without alginate bite registration were very highly correlated. For 336 measurements (N = 336) the correlation coefficient was found to be 0.953 (p < 0.001). Conclusions. 1.) Alginate is not a useful material in increasing visualization of teeth on MR scans. 2.) Tooth length measurements made on MR scans are highly correlated with tooth length measurements made on CBCT scans.
"],"dc:identifier":["https://scholarsrepository.llu.edu/etd/412"],"dc:language":["English"],"dc:rights":["This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights."],"dc:subject":["Dental Materials","Dentistry","Medicine and Health Sciences","Orthodontics and Orthodontology","Tooth - Radiography; Cone-Beam Computed Tomography; Magnetic Resonance Imaging; Imaging - three dimensional;","Alganite bite registration; Tooth length measurements; Dental Materials"],"dc:title":["Correlation of Tooth Length Measurements made on CBCT and 3T MR Images"],"thesis:degree_discipline":["Orthodontics and Dentofacial Orthopedics"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T02:52:45Z"}