A comparison of orthodontic bracket shear bond strength on enamel deproteinized by 5.25% sodium hypochlorite using total etch and self-etch primer

1st Physics and Technologies in Medicine and Dentistry Symposium

物理学;医药卫生

Ongkowidjaja, F.^1 ; Soegiharto, B.M.^1 ; Purbiati, M.^1

Department of Orthodontics, Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia^1

关键词: Artificial saliva;    Deproteinization;    Orthodontic brackets;    Shear bond strengths;    Sodium hypochlorites;    Statistically significant difference;    Universal testing machines;    White spot lesions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/884/1/012083/pdf
DOI  :  10.1088/1742-6596/884/1/012083

学科分类：卫生学

来源: IOP

【 摘 要 】

The shear bond strength (SBS) can be increased by removing protein pellicles from the enamel surface by deproteinization using 5.25% sodium hypochlorite (NaOCl). The SBS of a self-etch primer is lower than that of a total etch primer; nonetheless, it prevents white spot lesions. This study aimed to assess the SBS of the Anyetch (AE) total etch primer and FL-Bond II Shofu (FL) self-etch primer after enamel deproteinization using 5.25% NaOCl. Forty eight human maxillary first premolars were extracted, cleaned, and divided into four groups. In group A, brackets were bonded to the enamel without deproteinization before etching (A1: 10 teeth using total etch primer (AE); A2: 10 teeth using self-etch primer (FL)). In group B, brackets were bonded to the enamel after deproteinization with 5.25% NaOCl before etching (B1: 10 teeth using total etch primer (AE); B2: 10 teeth using self-etch primer (FL)). Brackets were bonded using Transbond XT, stored in artificial saliva for 24 h at 37°C, mounted on acrylic cylinders, and debonded using a Shimadzu AG-5000 universal testing machine. There were no significant differences in SBS between the total etch (AE) groups (p > 0.05) and between the self-etch (FL) groups (p > 0.05). There were significant differences in SBS between groups A and B. The mean SBS for groups A1, A2, B1, and B2 was 12.91±3.99, 4.46±2.47, 13.06±3.66, and 3.62±2.36 MPa, respectively. Deproteinization using NaOCl did not affect the SBS of the total etch primer (AE) group; it reduced the SBS of the self-etch primer (FL) group, but not with a statistically significant difference.