Optical Coherence Tomography (OCT) is a non-invasive diagnostic technique that utilizes near infrared light to image biological tissue microstructures. Previous research by current authors has shown the potential of OCT as an instrument to provide detailed information about the internal root canal without exposure to radiation. This study was set up to confirm the efficacy of the OCT using a catheter-based imaging probe for detection of intact dentin and modifications within root canals. Dental anomalies or areas of interest for imaging were selected to be internal resorption, vertical root fracture, horizontal root fracture, lateral canal, and bifurcation. This project used the St. Jude/Abbott OPTIS Integrated System, Dragonfly OPTIS Imaging Catheter, dental microscope, extracted teeth with single canals, a vacuum base vise, and handfiles. 11 teeth were selected via inclusion criteria and underwent preparation to simulate anomalies, followed by root canal analysis using OCT. This study determined (1) the minimal apical diameter of 0.9mm needed to fit the OCT catheter to the apex (2) confirmed consistency of method with repeated use, (3) verified presence of simulated anomalies, and (4) established continued functionality after alteration of catheter. In conclusion, OCT has the potential to be a viable diagnostic tool in endodontics. / 2026-06-24T00:00:00Z

Fabrication of a surveyed crown under an existing RPD requires designing a crown pattern that duplicates the coronal anatomy of the existing tooth including all undercut and non-undercut areas and occlusal rest seats. The aim of this study was to evaluate the accuracy of surveyed crown design duplication with CAD/CAM technology compared with the conventional methods in partially edentulous Kennedy class III arch form in an in vitro study. A maxillary dentiform with Kennedy Class III partial edentulism was used (missing teeth #4,13,14). Tooth #3 was prepared, and a PFM surveyed crown was fabricated and cemented with the appropriate contours to receive an Akers-type clasp: distal rest, circumferential direct retainer and reciprocal arm. A cast chrome-cobalt RPD framework was fabricated using conventional methods. The existing PFM crown was replaced by the surveyed study crowns for comparison. 10 PFM crowns were fabricated using a conventional method and 10 Zirconia crowns were fabricated using CAD/CAM method. The vertical position of HOC and crown thicknesses were measured in six spots (MB, B, DB, MP, P , DP) on each crown. The results of the present study indicated that CAD/CAM technology provided superior accuracy of surveyed crown design duplication compared to the conventional method. In terms of HOC vertical position, CAD/CAM crowns were significantly more accurate than the conventional crowns on the buccal side of the crown. On average, the HOC on the conventional crowns was 0.83  0.37, 1.27  0.64, and 1.23  0.48 mm higher than the control crown on the MB, B, and DB sites, respectively. On the lingual side, there was no significant difference between the two methods. In terms of the crown thickness, both methods yielded relatively similar results. The largest difference in crown thickness between test and control crowns was found in the DB site of the conventional group where the crowns were significantly thinner than the control. / Oral Biology

Thesis (Ph. D.)--University of Louisville, 1997. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--University of Louisville, 1997. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--University of Iowa, 2006. / Supervisor: Steven M. Levy. Includes bibliographical references (leaves 190-201).

Magister Chirurgiae Dentium - MChD / Although facial aesthetics has always been a part of orthodontic diagnosis and treatment planning, the criteria for facial evaluation have been somewhat arbitrary. They are often based on parameters from the field of art or from evaluating faces chosen by orthodontists or other professionals. The aims and objectives of the study were to determine the soft-tissue profile preference of a group of lay persons and professionals; to compare the preferences of the male and female assessors (lay persons group) with regard to the preferred profiles for the maleand female patient respectively; to test similarities and differences in the professional's perceptions of the various profiles. This qualitative study was undertaken at the orthodontic clinic at UWC using post-treatment soft tissue profile photographs of patients who had attended the orthodontic clinic. / South Africa

<p>The aim of the study was to determine the oral and debntal health status of pediatric cardiac patients, 12 years of age and younger, and compare them with non-cardiac patients. A total of 150 children, 75 with known cardiac condition (study group) and 75 no-cardiac (control group) were examined. No statistically significant differences were established in the study between the caries experience score for the cardiac and control groups. The study concludes that the cardiac group generally has a higher decay component and a lower missing component which may be an indication of the lack of dental intervention. The gingival inflammation was significantly higher in the cardiac group although the plaque scores were similar in the two groups.</p>

<p>The aim of the study was to determine the oral and debntal health status of pediatric cardiac patients, 12 years of age and younger, and compare them with non-cardiac patients. A total of 150 children, 75 with known cardiac condition (study group) and 75 no-cardiac (control group) were examined. No statistically significant differences were established in the study between the caries experience score for the cardiac and control groups. The study concludes that the cardiac group generally has a higher decay component and a lower missing component which may be an indication of the lack of dental intervention. The gingival inflammation was significantly higher in the cardiac group although the plaque scores were similar in the two groups.</p>

Thesis (M.S.P.H.)--University of Michigan, 1942.

Thesis (M. S.)--Ohio State University, 2008. / Title from first page of PDF file. Includes bibliographical references (p. 86-95).