Dentistry Commons^™

Association Of Inflammatory Markers And Growth Factors With Radiographically Assessed Wound Healing Of Extraction Sockets, Sasha Mohammadi

Theses & Dissertations

The purpose of this prospective cohort pilot study was to investigate the association of the periodontal status and inflammatory markers from the gingival crevicular and wound fluid with the healing outcomes following tooth extraction. The central research hypothesis is that extraction sites and the adjacent teeth that exhibit increased markers of inflammation, or decreased growth factors, at baseline or 2 weeks will be associated with reduced healing outcomes observed radiographically 3 months following surgery. Nine patients at the UNMC College of Dentistry who were seeking care to extract a posterior tooth due to advanced periodontal bone loss, non-restorable caries or …

A Cell Culture Model To Study Tobacco Associated Oral Cancer Progression And Treatment Resistance, Amanda Busch

Theses & Dissertations

Head and Neck Squamous cell carcinoma is the 6^th most common cancer in the world. Risk factors for HNSCC include alcohol and tobacco consumption, infection with Human Papilloma Virus, and exposure to environmental toxins. Unlike many other cancers, the incidence of HNSCC is growing, yet the treatment options and outcomes have not been significantly improved for decades. An increased understanding of the molecular mechanisms of these cancers is needed for improvement in early diagnosis, enhanced treatment effectiveness, and cancer prevention. 4-nitroquinoline 1-oxide (4NQO) is a well-tested, tobacco mimicking, carcinogen. 4NQO produces similar histological and chemical changes found in human …

The Effectiveness Of Resin-Modified Glass Ionomer Varnish In Preventing White Spot Lesions During Fixed Appliance Orthodontic Therapy: An In Vitro Study, Bradley Herman

Theses & Dissertations

The purpose of this investigation was to evaluate the efficacy of a glass ionomer varnish in preventing demineralization of enamel adjacent to and some distance away from an orthodontic bracket. Forty extracted human molars were divided into four different treatment groups (varnish in distilled water, varnish in acetic acid, enamel in acetic acid, and enamel in distilled water). Two 3 x 3 mm graphite windows were drawn on the tooth, one adjacent to the bracket and one 3 mm away from the first window, indicating the scanning area. Varnish was applied to the teeth in the varnish groups and all …

Effects Of Flash-Free Technique On Plaque Retention, White Spot Lesions, And Bracket Failure: A Randomized Clinical Trial, Payam Ishani Afousi

Theses & Dissertations

A side effect of orthodontic treatment is the development of white spot lesions (WSLs). This thesis attempted to evaluate the effects of the use of APC™ Flash-Free (FF) and conventional adhesives in bonding of orthodontic brackets on plaque formation and retention, WSL development, and bracket failure in-vivo. This was accomplished by collecting plaque samples from around orthodontic appliances and analyzing them using ATP-driven bioluminescence; scanning enamel surfaces using the Canary System™ to evaluate WSL development, and counting the number of spontaneous debonding of brackets of the 4 maxillary incisors in the first 6 months of treatment. It was found …

Squamous Cell Carcinoma Response To Cisplatin Exposure, Khanh V. Luong

Theses & Dissertations

Purpose: This thesis attempted to quantitatively analyze the individual cell fate choice in resistant head and neck UM-SCC38 cells exposed to cisplatin using the most current techniques available.

Methods: UM-SCC-38 cells were grown in Dulbecco’s modified Eagle’s medium (DMEM) supplemented with 10% fetal bovine serum (FBS). They were treated with cisplatin and ATM/ATR inhibitors of known dosages. Using live cell imaging, one hundred cells were tracked in each experiment and their behaviors were analyzed and entered into Microsoft Excel Spreadsheet to generate cell profile graphs. HaCaT cells, non-tumorigenic keratinocyte cell line, were also analyzed using live cell imaging and their …

Misdiagnosis Of Lateral Periodontal Cysts: A Retrospective Study, Piper Larson, John Huebner, Nagamani Narayana

Posters and Presentations: College of Dentistry

A total of 239 cases were retrieved from the files of the UNMC College of Dentistry oral biopsy service which had lateral periodontal cyst (LPC) as a clinical or a histological diagnosis. Of these, 178 were submitted with a clinical differential diagnosis that included LPC. Upon histological examination only 26 (11%) of those were in fact LPC. Only 21(9%) of the 51 cases diagnosed histologically met the criteria for LPC. Within those 239 cases, 120(50%) cases were inflammatory cysts, 31(13%) of the samples were determined to be keratocystic odontogenic tumors (odontogenic keratocysts). Conclusion: The LPC is frequently misdiagnosed due to …