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Full-Text Articles in Dentistry
Assessing Orthodontic-Bracket Impacts On Lip Profile At Bonding And Debonding Stages, Martin Trockel
Assessing Orthodontic-Bracket Impacts On Lip Profile At Bonding And Debonding Stages, Martin Trockel
Student Theses, Dissertations and Capstones
Introduction: One factor that contributes greatly to the lower face appearance and orthodontists have the ability to affect is lip profile. Clinical assessment of the lip profile is an important element in the decision of orthodontic treatment planning and in the evaluation of treatment progress and outcome. Three known factors influence the lip profile; the lip thickness, the underlying bone, and the tooth position. The positions and inclinations of the anterior teeth can affect the lip position, but it is unclear whether orthodontic brackets bonded to the labial surface of anterior teeth move the lip position and thereafter change the …
Effect Of Surface Preparation On The Shear Bond Strength Of Orthodontic Brackets Bonded To Zirconia : An In-Vitro Study, Nathaniel Wieder
Effect Of Surface Preparation On The Shear Bond Strength Of Orthodontic Brackets Bonded To Zirconia : An In-Vitro Study, Nathaniel Wieder
Student Theses, Dissertations and Capstones
Objectives: The purpose of this in-vitro study was to evaluate the effects of three different surface preparation methods on the shear bond strength of orthodontic brackets bonded to zirconia and determine the most appropriate method. Methods: 45 zirconia and 30 leucite-reinforced porcelain mandibular premolar crowns were divided into 5 groups and received the following surface preparations: 37% phosphoric acid and non-hydrolyzed silane, 4% hydrofluoric acid and hydrolyzed silane, microetch with 50μ Al 2 O3 particles. A universal adhesive primer containing MDP was applied and the brackets were bonded with a bis-GMA composite resin. Shear bond strength (SBS) at bond …