Dimensional accuracy of ceramic self-ligating brackets and estimates of theoretical torsional play.

Dimensional accuracy of ceramic self-ligating brackets and estimates of theoretical torsional play. Angle Orthod. 2016 Jan 12; Authors: Lee Y, Lee DY, Kim YR Abstract OBJECTIVE:   To ascertain the dimensional accuracies of some commonly used ceramic self-ligation brackets and the amount of torsional play in various bracket-archwire combinations. MATERIALS AND METHODS:   Four types of 0.022-inch slot ceramic self-ligating brackets (upper right central incisor), three types of 0.018-inch ceramic self-ligating brackets (upper right central incisor), and three types of rectangular archwires (0.016 × 0.022-inch beta-titanium [TMA] (Ormco, Orange, Calif), 0.016 × 0.022-inch stainless steel [SS] (Ortho Technology, Tampa, Fl), and 0.019 × 0.025-inch SS (Ortho Technology, Tampa, FL)) were measured using a stereomicroscope to determine slot widths and wire cross-sectional dimensions. The mean acquired dimensions of the brackets and wires were applied to an equation devised by Meling to estimate torsional play angle (γ). RESULTS:   In all bracket systems, the slot tops were significantly wider than the slot bases (P
Source: The Angle Orthodontist - Category: Dentistry Authors: Tags: Angle Orthod Source Type: research

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