Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Entire DC Network
Effects Of Fluoride On Corrosion Properties Of Orthodontic Retention Wires, John J. Simindinger
Effects Of Fluoride On Corrosion Properties Of Orthodontic Retention Wires, John J. Simindinger
Master's Theses (2009 -)
Objective: Alloys used in retention wires corrode in the oral environment. Previous studies have examined the effects of fluoride on archwires used in active treatment, but not on retention wires. The goal of this study was to determine what effect fluoride exposure has on corrosion of various lingual bonded retainer wires in the mouth. Methods: Twenty samples from six different wire types were tested in two solutions. Half were tested in Fusayama-Meyer artificial saliva, while the other half were tested in Fusayama-Meyer plus fluoride correlated to the concentration of toothpaste. A potentiostat was used to measure open circuit potential (OCP) …
Mechanism Of Mechanical Vibration In Enhancing Orthodontic Retention, Brent A. Ito
Mechanism Of Mechanical Vibration In Enhancing Orthodontic Retention, Brent A. Ito
Master's Theses (2009 -)
Introduction: Low-magnitude, high-frequency (LMHF) mechanical vibration is proven to be anabolic and can increase alveolar bone mass. The objectives of this study were to generate an orthodontic retention cell culture model and investigate the effects of LMHF mechanical vibration on human periodontal ligament fibroblast (HPLF) cells after orthodontic loading (retention) in vitro. Materials and Methods: HPLF cells were seeded at a density of 4x105/well in 6-well Flexcell culture plates (Day 0). On day 3, the cells were mechanically stretched (15% surface extension) for 1 hour to mimic orthodontic loading/tension in vitro. On day 5, the cells were randomly assigned to …
Orthodontic Bond Strength Comparison Between Two Filled Resin Sealants, James Kolstad
Orthodontic Bond Strength Comparison Between Two Filled Resin Sealants, James Kolstad
Master's Theses (2009 -)
Introduction: Sealants are used in orthodontics to help prevent demineralization during treatment. The objective of this study was to determine if there is a difference in the shear bond strength (SBS) between two different resin sealants bonded to teeth. Materials and Methods: Extracted human premolars (n=20/group) were randomly divided and prepared by acid etching, followed by application of primer or sealant. Group 1, the control group, used Transbond XT Primer (3M Unitek). Groups 2 and 3 were prepared with the sealants L.E.D. Pro Seal (Reliance Orthodontic Products) and Opal Seal (Opal Orthodontics) respectively. Transbond XT Adhesive was applied to a …
Application Of Mechanical Vibration To Enhance The Stability After Orthodontic Treatment - A Micro - Ct Study, Nicolas Branshaw
Application Of Mechanical Vibration To Enhance The Stability After Orthodontic Treatment - A Micro - Ct Study, Nicolas Branshaw
Master's Theses (2009 -)
Introduction: Mechanical vibration (MV) possesses anti-resorptive properties that can possibly enhance the stability of the dentition during retention, lessening the potential for relapse of teeth to their initial positions. In this project, we established a mouse model and investigated the effects of MV on bone modeling during orthodontic retention. Materials and Methods: Thirty-two 14-week-old inbred strain C57BL/6 male mice were randomly assigned into four groups: 1) Control (N=6); 2) Mechanical Vibration (MV) (N =6); 3) Orthodontic Retention (OR) (N=9); and 4) Orthodontic Retention and Mechanical Vibration (ORMV) (N=11). All mice in OR and ORMV groups received approximately 10g of orthodontic …
The Effect Of Water Storage On Bending Properties Of Esthetic, Fiber-Reinforced Composite Orthodontic Wires, Ju-Han Chang
The Effect Of Water Storage On Bending Properties Of Esthetic, Fiber-Reinforced Composite Orthodontic Wires, Ju-Han Chang
Master's Theses (2009 -)
Introduction: The translucent optical property of fiber-reinforced composite wires meets the esthetic demand of orthodontic patients; however, studies need to be conducted to determine if they also have the desired mechanical properties for active orthodontic treatment. The goal of this research was to study the effect of water storage on the mechanical properties of fiber-reinforced composite archwires and compare it to conventional nickel-titanium (NiTi) and stainless steel (SS), and beta-titanium (TMA) archwires. Materials and Methods: Align A, B, C and TorQ A, B from BioMers Products, 0.014", 0.016", 0.018", 0.019" x 0.025" Nitinol Classic (3M Unitek), 0.016" SS, and 0.019 …