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ORIGINAL RESEARCH
Year : 2012  |  Volume : 2  |  Issue : 4  |  Page : 551-555

Comparison of frictional resistance of aesthetic and semi aesthetic self ligating brackets


1 Professor, Department of Orthodontics, Sree Balaji Dental College , Chennai, India
2 Professor & Head, Department of Orthodontics, Sree Balaji Dental College , Chennai, India
3 Postgraduate student, Professor & Head, Department of Orthodontics, Sree Balaji Dental College , Chennai, India
4 Reader, Department of Orthodontics, Sree Balaji Dental College , Chennai, India

Correspondence Address:
Dr. M S Kannan
Professor, Department of Orthodontics, Sree Balaji Dental College , Chennai
India
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Source of Support: None, Conflict of Interest: None


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Aim: The frictional resistance encountered during sliding mechanics has been well established in the orthodontic literature, and it consists of complex interactions between the bracket, archwire, and method of ligation. The claim of reduced friction with self-ligating brackets is often cited as a primary advantage over conventional brackets. This study was done to compare and evaluate the frictional forces generated between fully aesthetic brackets and semi-aesthetic self ligating brackets which are of passive form and SEM (scanning electron microscope) study of the Brackets after Frictional evaluation. Materials: Two types of Self-ligating aesthetic brackets, Damon Clear [Ormco] made of fully ceramic and Opal [Ultradent Products,USA] and, Two types of Self-ligating semi-aesthetic brackets, Clarity SL [3M Unitek] and Damon 3 [Ormco] both of which are made of ceramic with metal slot. Arch wires with different dimensions and quality 17x25, 19x25 TMA and 17x25, 19x25 SS that came from plain strands of wire were used for frictional comparison test. The brackets used in this study had 0.022x0.028 inch slot. Results: The Statistical tests showed significantly smaller amount of kinetic frictional forces is generated by Damon 3 (semi-aesthetic self-ligating brackets). For each wire used, Damon 3 displayed significantly lower frictional forces (P≤.05) than any of the self-ligating system, followed by Opal (fully aesthetic self-ligating brackets) which gener- ated smaller amount of frictional forces but relatively on the higher side when compared with Damon 3. Damon clear (fully aesthetic self-ligating brackets) generated the maximum amount of kinetic forces with all types of wire dimensions and properties when compared to the other three types of self-ligating system. Clarity SL (semi- aesthetic self-ligating brackets) generated smaller amount of frictional forces when compared with Damon clear and relatively higher amount of frictional forces when compared to Opal and Damon 3.


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