Scanning electron microscopy analysis of metallic and aesthetic bracket meshes before and after debonding

• 발행기관: 대한치과교정학회
• 저자명: Jacqueline Adelina Rodríguez-Chávez Hugo Marcelo Flores-Ruiz Abigailt Flores-Ledesma Alvaro García-Pérez Lourdes Bazán-Diaz
• 간행물 정보: 『The Korean Journal of Orthodontics』제55권 제1호, 15~25쪽, 전체 11쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 2025.01.31

국문 초록

Objective: To study the influence of bracket base meshes on shear bond strength and observe them using a scanning electron microscopy (SEM) before and after debonding. Methods: Ninety brackets were divided into nine groups of 10 samples each: G1-Alexander, G2-Mini Sprint® Brackets, G3-In-Ovation R CCO, G4-Gemini SL Self-Ligating Bracket, G5-Classic mini 2G Stylus®, G6-Gemini Metal Brackets, G7-ClarityTM Advanced, G8-Crystall-Ize®, and G9-Ceramic Series Flexx 2G®. Groups G1 to G6 and G7 to G9 consisted of metallic and aesthetic brackets, respectively. Initial photographs of all brackets were taken through SEM at 25X magnification. The brackets were then bonded to premolars using TransbondTM XT, and a shear bond strength test was conducted after 24 hours using an Instron machine at 1 mm/min. After debonding, the bracket meshes were observed using SEM. Results: Before bonding, 72.22% of brackets didn’t present mesh defects, while 27.77% did. SEM analysis revealed that G4 and G5 presented defects in 100%, G7 in 40%, and G8 in 10%. The average shear bond strength of 9.67 ± 2.84 MPa and 11.21 ± 4.99 MPa were obtained for both metallic and aesthetic brackets, respectively. A Pairwise–Wilcoxon test with Benjamini–Hochberg correction was conducted to determine specific statistical differences between the groups, revealing significant differences based on bracket type and shear bond strength (P < 0.009). Conclusions: This study suggested that the shape of bracket meshes influenced shear bond strength.

목차

INTRODUCTION

MATERIALS AND METHODS

RESULTS

DISCUSSION

CONCLUSIONS

REFERENCES

키워드

Bracket Adhesive Shear bond strength Scanning electron microscopy