Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 181 for “"Bracket"”.
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Effect of Delayed Polymerization Time and Bracket Manipulation on Orthodontic Bracket Bonding
This study examined the effect of bracket manipulation in combination with delayed polymerization times on orthodontic bracket shear bond strength and degree of resin composite conversion. Orthodontics brackets were bonded to extracted third molars in a simulated oral environment after a set period …
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Influence of Bracket Type Combined with Delayed Light Activation on Bracket-Adhesive Shear Bond Strength
This study examined the effect of bracket type and varying delayed polymerization times in combination with bracket manipulation on adhesive temperature change, shear bond strength (SBS), degree of conversion (DC), and adhesive remnant index (ARI) score when using a resin adhesive. Specimens from …
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Bracket study : textual, computational, and digital
Bracket system is an important and characteristic component in the traditional Chinese architecture. Much has been studied about the system - its origin, historical evolution, structure, and composition - in the traditional way: documents, hand drawings, and physical models. In this thesis, …
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Influence of Bracket System on Smile Esthetics
OBJECTIVE: This study aimed to determine which bracket system produces the most esthetic outcome when used as prescribed. METHODS: A survey compared Pitts™, Damon™, and 3M MBT™ prescription brackets. Photos of 18 treated cases (3 male and 3 female per system) were shown to 160 participants (100 …
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Postural Adaptations in Self-Ligating Bracket Treatment
The use of self-ligating brackets has gained popularity recently in orthodontic treatment. The Damon philosophy is a system that employs passive self-ligation with the use of light forces to achieve arch development and to relieve dental crowding. The philosophy of the system is that the use of …
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Corrosion between orthodontic archwires and bracket couples
… alone or when coupled with a stainless steel bracket.;Using potentiostatic anodic polarization, the samples were tested in 0.9% NaCl solution at room temperature with neutral pH. The breakdown potentials of stainless steel, NiTi, TMA, and the stainless steel bracket were 600 mv, 1600 mv, >2000 …
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The Kauffman Bracket and Genus of Alternating Links
… are three rules to help us finding the Kauffman bracket polynomial. Choosing knot’s orientation, then applying the Seifert algorithm to find the Euler characteristic and genus of its surface. Finally finding the relationship of the Kauffman bracket polynomial and the genus of the alternating …
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Kauffman Bracket Skein Modules And The Quantum Torus
If M is a 3-manifold, the Kauffman bracket skein module is a vector space Kq (M ) functorially associated to M that depends on a parameter q ∈ C* . If F is a surface, then Kq (F x [0, 1]) is an algebra, and Kq (M ) is a module over Kq ((∂M ) x [0, 1]). One motivation for the definition is that if L …
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Reducing Frictional Resistance between Orthodontic Bracket and Arch Wire
… frictional resistance between an orthodontic bracket and an archwire during usage of the continuous edgewise method of space closure. It was hypothesized that altering the leading edge of the bracket (in the direction of retraction) would significantly decrease the force required to retract a …
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Investigation of Ultimate Bending Strength of Steel Bracket Plates
… for flexural rupture of an eccentrically loaded bracket plate is based on the material tensile rupture strength times the net elastic section modulus. Different bolt and plate sizes were tested to determine if this model is correct. It was found that the current model is conservative and that the …
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Effects of fluoride varnish application and phosphate buffered saline solution with or without demineralizing conditions prior to bracket bonding on subsequent enamel-bracket shear bond strength
… with or without demineralization (DM) prior to bracket bonding on subsequent enamel-bracket shear bond strength (SBS). Sixty maxillary third molars were used for the testing procedures after the roots were embedded in acrylic resin. Specimen were randomly assigned to the following four groups: …
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A Comparative Study of Conventional-Ligating and Self-Ligating Bracket Systems
… the frictional resistance of four self-ligating brackets and two conventional bracket systems using two different types of orthodontic arch wires in both wet and dry fields. Six different brands of upper right central incisor brackets with 0.018-in slots were evaluated. Group A : self-ligating …
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A Frictional Evaluation of a New Surface-Modified Titanium Orthodontic Bracket
… refers to the guiding of a tooth by means of the bracket slot along an archwire in response to some applied force. This concept of tooth movement is subject to both static and kinetic friction. An accurate evaluation of an appliance's frictional properties enables a clinician to identify …
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Development of a design cycle for an additively manufactured aircraft rudder bracket
For traditional manufacturing processes, the variation of component quality and mechanical properties exists but these can be minimised by the implementation of process controls. Hence, it becomes key to define the full process for developing and manufacturing components. These processes have been …
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Effects of Wire Material, Deflection, and Interbracket Distance on Burstone Bracket Geometry Force Systems
… system with no moment on the lesser angled bracket), which may or may not occur at the classically defined geometry IV. Materials and Methods. A six-degree of freedom load cell was used to measure the force systems in different combinations of wire materials, wire dimensions, total angle of …
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The Effect of Pre-Cure Bracket Movement on the Shear Bond Strength of Metal Brackets
The effect on shear bond strength of bracket movement after seating the brackets and before light curing has not been reported. The purpose of this study was to determine the effect of linear and rotational pre-cure bracket movement on the shear bond strength of orthodontic brackets. 100 extracted …
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Effects Of Delayed Polymerization Time and Bracket Manipulation on Orthodontic Resin Modified Glass Ionomer Adhesive
… delayed polymerization times in combination with bracket manipulation on shear bond strength (SBS), degree of conversion (DC), and adhesive remnant index (ARI) score when using a resin modified glass ionomer (RMGI) adhesive. Specimens were divided into three groups of clinically relevant delay …
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Orthodontic Bracket Bond Strength Using Self-Etching Primer With or Without Pumice or Acid Etch Pretreatment
… compare the shear bond strength of orthodontic brackets to enamel in four bonding protocols: SEP without prior pumicing (None), Pre-etch and SEP without prior pumicing (Pre-etch), control: SEP with prior pumicing (Pumice), and Pre-etch and SEP with prior pumicing (Both). 80 extracted bovine …
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Effect of Highly Filled Light-Cured Resin Sealant on Bracket Shear Bond Strength in Demineralization Conditions
… a highly filled light-cured sealant (HFLCS) on bracket shear bond strength and subsequent adhesive remnant index (ARI) following exposure to cariogenic challenge. Specimens were divided into two groups to receive conventional primer or HFLCS prior to orthodontic bracket bonding in a simulated …
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