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ORIGINAL RESEARCH
Year : 2011  |  Volume : 1  |  Issue : 4  |  Page : 195-204

Comparison of shear bond strength of three different company composites cured with plasma arc curing light and a conventional Tungsten-quartz-halogen curing light: An in vitro study


1 Professor and Head, Dept. of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Chennai, India
2 Professor, Dept. of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Chennai, India
3 Reader, Dept. of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Chennai, India
4 Senior Lecturer, Dept. of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Chennai, India
5 Postgraduate Student, Dept. of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospital, Chennai, India

Correspondence Address:
Dr. R V Murali
Professor and Head, Dept. of Orthodontics and Dentofacial Orthopedics, Sree Balaji Dental College and Hospitals, Pallikaranai, Chennai - 600 100
India
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Source of Support: None, Conflict of Interest: None


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Introduction: This in vitro study compared the sheer bond strength of three different company light cure adhesives namely Transbond XT, Resilence bond and Ormco Enlight, when cured with plasma arc curing light and a conventional tungsten- quartz-halogen curing light. Methods: The sample for this study included 180 freshly extracted maxillary first premolars. They were divided into six equal groups of 30 samples each. The bonding was done by the same operator to standardize the technique. Each bracket was cured for three seconds on either proximal side for plasma arc group and for 20 seconds on either proximal side for tungsten-auartz halogen group. The shear tests were performed using the LLOYD universal testing machine and the point of breakage for each sample was recorded in megapascal. Results: The mean shear bond strength values obtained for Group 1 (Transbond XT), Group 2 (Resilence bond) and Group 3 (Ormco Enlight), cured with plasma arc light cure unit were 15.60 MPa, 14.14 MPa and 14.68 MPa, respectively. The mean shear bond strength values obtained for Group 4 (Transbond XT), Group 5 (Resilence bond) and Group 6 (Ormco Enlight), cured with tungsten-quartz halogen light cure unit were 14.57 MPa, 13.67 MPa and 14.26 MPa, respectively. Conclusion: Plasma arc lights are an advantageous alternative to conventional light-curing because they significantly reduce the curing time of orthodontic brackets and thereby save chair side time without compromising bond strength.


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