Medicine and Health Sciences Commons^™

Candida Albicans Adhesion And Biofilm Formation On Phosphated And Non-Phosphate Containing Poly(Methylmethacrylate) Polymers, Kathryn Elizabeth Ryan

Master's Theses (2009 -)

Denture-induced stomatitis is prevalent among prosthesis users, particularly the elderly and institutionalized where it has been estimated to be present in over 60-65% of denture wearers. Treatment of this clinical condition is problematic due to incomplete disinfection of the acrylic surface and rapid microbial re-colonization. Moreover, ingestion or aspiration of pathogens in denture plaque exposes the elderly and immunocompromised to unexpected infections.

Acrylic polymers have generally been used to replace missing teeth and periodontal tissues in edentulous or partially dentate patients. Currently, edentulous adults in the US population are common, with complete edentulism greater than 41% among Americans aged 65 …

Bracket Bond Strength Effects Of Incorporation Of Novamin Into An Orthodontic Bonding Resin, Jeffrey Waterhouse

Master's Theses (2009 -)

Despite advances in caries research and the development of protective mechanisms and materials, orthodontic white spot decalcification remains a significant problem. Increased plaque buildup around orthodontic appliances, combined with inadequate hygiene and a susceptible patient, can lead to unesthetic demineralized lesions in enamel.

Relatively new to the arena of caries prevention, NovaMin, a bioactive glass, has shown some promise in areas of remineralization of early lesions, protection against acidic challenge, and has demonstrated antiplaque properties. This study explored a new application of the material, incorporation into an orthodontic bonding composite resin. Objectives of the study were: to determine if the …

An In Vitro Comparison Of The Setting Of Mta With And Without The Application Of A Moist Cotton Pellet, Craig Darrell Johnson

Master's Theses (2009 -)

Introduction: The purpose of this study was to compare the setting of MTA with and without the application of a moist cotton pellet. Methods: Fifty samples of MTA were mixed according to manufacturer’s instructions, placed with an amalgam carrier, and condensed with a plugger into a custom metal block with a well depth of 3.5 mm. Twenty-five of the MTA samples had a moist cotton pellet placed in contact with MTA mixture and twenty-five MTA samples had no moist cotton pellet in contact with the MTA mixture. The samples were placed in 100% humidity at 37°C and evaluated for penetration …

Incidence Of Removable Partial Denture Types In Eastern Wisconsin, Deo K. Pun

Master's Theses (2009 -)

Aim: This study was designed to investigate patterns of tooth loss in patients receiving removable partial dentures.

Materials and Method: A point and shoot digital camera was used to collect 1502 digital images of cases at 5 dental laboratories in the eastern portion of the state of Wisconsin. Any case presenting to one the dental laboratories requesting a RPD was included. Two photographs were taken of each case. The first photograph was taken immediately upon arrival to the lab while the second photograph was taken immediately prior its first departure. A calibrated investigator analyzed all the photographs for Kennedy classification, …

Cementoblastic Response To High Vs. Low Level Of Mechanical Force In Vitro, Natalie Nicole Mullally

Master's Theses (2009 -)

One of the possible complications of orthodontic treatment is apical root resorption. During orthodontic treatment, as the teeth are being moved, the alveolar bone is continually being modeled to accommodate the teeth. This process activates specific cells that are responsible for bone resorption and can have the unwanted effect of resorbing the apex of the tooth root adjacent to the bone. It is unclear exactly what aspects of orthodontic treatment may trigger the resorptive process. A positive correlation, however, between root resorption and mechanical loading applied during orthodontic tooth movement has been established implicating orthodontic treatment in this adverse effect. …

Bonding With Self-Etching Primers - Pumice Or Pre-Etch? An In Vitro Study, Ian J. Fitzgerald

Master's Theses (2009 -)

The objective of this study was to compare the shear bond strengths (SBS) of orthodontic brackets bonded with self-etching primer using different enamel surface preparations.

A 2-by-2 factorial study design was used. Sixty human premolars were harvested, cleaned and randomly assigned to four groups (n=15/group). Teeth were bathed in saliva for 48 hours to form a pellicle. Treatments were assigned as follows: Group 1 was pumiced for 10 seconds and pre-etched for five seconds with 37% phosphoric acid before bonding with self-etching primer (Transbond Plus). Group 2 was pumiced for ten seconds before bonding. Group 3 was pre-etched for five …

Bondable Lingual Spur Therapy To Treat Anterior Open Bite, Elissa Joy Mcrae

Master's Theses (2009 -)

The purpose of this study was to evaluate the effect of bondable lingual tongue spurs (BLTS; Tongue Tamers®, Ortho Technology, Tampa, FL) on measures of overbite and incisor position in a sample of anterior open bite subjects who had either a digit-sucking habit or an anterior tongue posture problem. Patient acceptance of the spurs was also evaluated. BLTS were placed on all maxillary and mandibular incisors of 12 subjects (mean age 13.9 years) with anterior open bite. Dental casts and lateral cephalometric radiographs were taken pre-treatment (T1) and after 6 months of lingual spur treatment alone (T2). Overbite and overjet …

Light-Activation Influence On The Thermal Analysis Of A Resin-Modified Glass-Ionomer, Raksha Srinivas

Master's Theses (2009 -)

The acid-base and light polymerization reactions in resin modified glass ionomers (RMGI) have been shown to compete and possibly inhibit one another during early RMGI development. Earlier beginning times of light polymerization initiation may limit the acid-base reaction and if time allowed for the acid-base components to react is increased, the extent of light cure reaction may be lesser. The thermal behavior of a commercially available RMGI was investigated in relation to a light initiation regimen using a differential scanning calorimeter (DSC). The relationship between delay in light initiation or no light initiation and the resultant set matrix of the …

Application Of Mechanical Vibration To Modulate Orthodontic Tooth Movement (Otm) In Mice, Andrew Rummel

Master's Theses (2009 -)

Purpose: The purpose of this study was to use micro CT to evaluate the effect of mechanical vibration on orthodontic tooth movement (OTM) in mice. Materials and Methods: Thirty-six mice (C57BL/6, 20 weeks old, male) were randomly divided into four groups: spring/vibration (SV), spring only (S), vibration only (V), control (C). A nickel-titanium (NiTi) spring was fabricated and inserted bilaterally between the maxillary 1st molars, delivering an initial force of 20 grams. From day 0, mechanical vibration (4Hz frequency, 20micron displacement, 5 min per session duration) was applied to the left maxillary 1st molar every three days for 3 weeks …