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Quintessence Publishing: Journals: ORTHODONTICS
ORTHODONTICS
The Art and Practice of Dentofacial Enhancement

Formerly World Journal of Orthodontics

Edited by
Rafi Romano, DMD, MSc (Editor-in-Chief)

ISSN 2160-2999 (print) / ISSN 2160-3006 (online)

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Publication:
Spring 2007
Volume 8 , Issue 1

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EVALUATION OF A NEW NANO-FILLED RESTORATIVE MATERIAL FOR BONDING ORTHODONTIC BRACKETS

Samir E. Bishara, BDS, DDS, DOrtho, MS / Raed Ajlouni, BDS, MS / Manal M. Soliman, BDS, MS / Charuphan Oonsombat, DDS, MS / John F. Laffoon, BS / John Warren, DDS, MS

Pages: 8-12
PMID: 17373220

Aim: To compare the shear bond strength of a nano-hybrid restorative material, Grandio (Voco, Cuxhaven, Germany), to that of a traditional adhesive material (Transbond XT; 3M Unitek, Monrovia, CA, USA) when bonding orthodontic brackets. Material and methods: Forty teeth were randomly divided into 2 groups: 20 teeth were bonded with the Transbond adhesive system and the other 20 teeth with the Grandio restorative system, following manufacturer¡¯s instructions. Student t test was used to compare the shear bond strength of the 2 systems. Significance was predetermined at P ¡Ü .05. Results: The t test comparisons (t = 0.55) of the shear bond strength between the 2 adhesives indicated the absence of a significant (P = .585) difference. The mean shear bond strength for Grandio was 4.1 ¡À 2.6 MPa and that for Transbond XT was 4.6 ¡À 3.2 MPa. During debonding, 3 of 20 brackets (15%) bonded with Grandio failed without registering any force on the Zwick recording. None of the brackets bonded with Transbond XT had a similar failure mode. Conclusions: The newly introduced nano-filled composite materials can potentially be used to bond orthodontic brackets to teeth if its consistency can be more flowable to readily adhere to the bracket base. World J Orthod 2007;8:8¨C12.

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