Shear bond strengths of Chinese and American brackets used in Indonesia

Ellyza Herda ； Fanny Anduari Dianty ； Hana Tania Rahmaputri ； Decky Joesiana Indrani

《Journal of International Dental and Medical Research》 11卷2期 (2018/07) Pp. 370-375

摘要

The aim of this study was to evaluate the shear bond strengths of three types of metal brackets used in Indonesia. Forty human maxillary premolars, extracted for orthodontic purposes, were fixated in PVC cylinders using acrylic resins. The specimens were divided into four groups (n = 10) based on the type of bracket and adhesive used. The bond strengths of two types of Chinese metal brackets (Hangzhou 3B^(TM) and Zhejiang Protect^(TM)) bonded with Transbond XT^(TM) (3M, Unitek) and an American metal bracket (Mini Dyna Lock^(TM)) bonded with Transbond XT^(TM) and Enlight^(TM) (Ormco) were determined. Statistical analysis was conducted using independent samples t-test (p ＜ 0.05). The mean shear bond strengths of the 3B^(TM) and Protect^(TM) brackets were 6.09 ± 0.53 and 7.9 ± 0.61 MPa, respectively (p ＜ 0.05), and those of the Mini Dyna Lock^(TM) brackets using Transbond XT^(TM) and Enlight^(TM) were 12.46 ± 0.35 and 9.69 ± 0.53 MPa, respectively (p ＜ 0.05). These results suggested that the shear bond strengths of the Chinese metal brackets were within the acceptable range for orthodontic use. In addition, the American bracket bonded with Transbond XT^(TM) had a higher shear bond strength when compared with that bonded with Enlight^(TM).

關鍵字

Brackets ； adhesive material ； shear bond strength