Shear Bond Strength of Personalized Machined Brackets

doi:10.13701/j.cnki.kqyxyj.2024.08.013

Abstract

Abstract: Objective: To compare the bonding strength of four types of metal bottom plate brackets. Methods: Forty-eight extracted premolars were randomly assigned to eight main groups, with six teeth in each group. Personalized machined bottom bracket was adopted in group A and B, new net bottom bracket was adopted in group C and D, two-way barb bottom bracket was adopted in group E and F, and traditional net bottom bracket was adopted in group G and H. Among them, chemically cured resin adhesive was adopted for bonding brackets in group A, C, E, and G, light-cured resin adhesive was adopted for bonding brackets in group B, D, F, and H. Before the bonding experiment, the bottom plate was observed with the scanning electron microscope. The shear strength of each bracket was measured with a universal material testing machine, and the adhesive residue on each bracket was counted. Results: When using chemically cured resin adhesive, the bonding strength of the brackets on the two-way barb bottom bracket was lower than that of other three kinds of brackets (P<0.05). When using light-cured resin adhesive, compared with other three kinds of brackets, the two-way barb bottom bracket had the lowest bonding strength, the new net bottom bracket had the lowest bonding strength, the traditional net bottom bracket and the personalized machined bottom bracket had the highest bonding strength, and the difference was statistically significant (P<0.05). There was no significant difference in bonding strength between the traditional net bottom bracket and the personalized machined base bracket (P>0.05). There were significant differences in ARI scores among all groups (P<0.05). ARI score in group H was the smallest, and the difference between group H, group A, and group E was statistically significant (P<0.05). Conclusion: The use of chemically cured resin adhesive or light-cured resin adhesive has no obvious effect on personalized machined bottom brackets bonding strength, and the bonding strength can meet the requirements of orthodontic clinical bonding. The fracture site of group H was relatively closer to the enamel, and the risk of enamel damage in the other groups was less during the process of debonding.

Key words: personalized machined bracket, bracket bases, adhesives, bond strength

YANG Ruiting, ZHANG Jie, XU Yafen, JIANG Yingqi, DAI Xiwei, ZHOU Yin, ZHANG Qi. Shear Bond Strength of Personalized Machined Brackets[J]. Journal of Oral Science Research, 2024, 40(8): 735-740.

References

[1] 王丹.冲压工艺的发展现状及冲压模具的设计与发展[J].造纸装备及材料,2022,51(4): 78-80.
[2] 张鹏,张弓,盛亚,等.纯钛个性化正畸托槽的设计与制造技术研究[J].口腔疾病防治,2017,25(4): 216-222.
[3] Li Y, Tang K, Zeng L. A voxel model-based process-planning method for five-axis machining of complicated parts [J]. J Comput Inf Sci Eng, 2020, 20(4): 041012.
[4] Cakir E, Duman AN, Yildirim AZ, et al. Shear bond strength between orthodontic brackets and monolithic 4Y-TZP: An in vitro study [J]. Materials (Basel), 2023, 16(14): 5173.
[5] Hodecker LD, Scheurer M, Scharf S, et al. Influence of individual bracket base design on the shear bond strength of in-office 3D printed brackets-an in vitro study [J]. J Funct Biomater, 2023, 14(6): 289.
[6] Tavakolinejad Z, Kamalabadi YM, Salehi A. Comparison of the shear bond strength of orthodontic composites containing silver and amorphous tricalcium phosphate nanoparticles: an ex vivo study [J]. J Dent (Shiraz), 2023, 24(3): 285-292.
[7] Sadeghian S, Fathpour K, Biglari M. Effect of sodium ascorbate on the shear bond strength of orthodontic brackets to bleached enamel using universal dental adhesive [J]. Dent Res J (Isfahan), 2023, 20: 28.
[8] César FM, Baldi HJ, Geraldo LV, et al. Effect of Yd:YAG laser irradiation on the shear bond strength of orthodontic metal brackets [J]. Dental Press J Orthod, 2020, 25(1): 28-35.
[9] Gazhva S, Krasnokutskaya N, Lobova A, et al. Personified approach to selecting a method for bracket positopning with 3D technology [J]. Archiv EuroMedica, 2021, 11(1): 131-136.
[10] 李兴元,郝志蓉.个性化舌侧矫正器的制作和应用[J].中国药物与临床,2015,15(5): 702-704.
[11] 张鹏,张弓,盛亚,等. 纯钛个性化正畸托槽的设计与制造技术研究[J].口腔疾病防治,2017,25(4): 216-222.
[12] 黄清川,黄翠,蔡新杰. 数字化口内扫描技术在口腔修复学临床和教学中的应用[J].口腔颌面修复学杂志,2022,23(5): 366-373.
[13] Boudrot M, François P, Abdel-Gawad S, et al. Shear bond strength of a RMGIC for orthodontic bracket bonding to enamel [J]. BDJ Open, 2024, 10(1): 1.
[14] Jain M, Patel D, Sharma T. The call for standardization of shear bond strength testing protocols in orthodontics [J]. J Indian Orthod Soc, 2023, 57(1): 39-42.
[15] Hajrassie MKA, Khier SE. In-vivo and in-vitro comparison of bond strengths of orthodontic brackets bonded to enamel and debonded at various times [J]. Am J Orthod Dentofacial Orthop, 2007, 131(3): 384-390.
[16] Kim HJ, Kwon TY, Noh HK, et al. The effect of different mechanical retention forms on shear bond strength of rebonding of ceramic brackets [J]. Dent Mater J, 2024, 43(1):84-89.
[17] Sharma-Sayal SK, Rossouw PE, Kulkarni GV, et al. The influence of orthodontic bracket base design on shear bond strength [J]. Am J Orthod, 2003, 124(1):74-82.
[18] Knox J, Hubsch P, Jones ML, et al. The influence of bracket base design on the strength of the bracket-cement interface [J]. J Orthod, 2000, 27(3): 249-254.
[19] Luis A. V. Izquierdo, Francyle S. H. Sanches, Francisco Molina, et al. Comparative study of adhesion of brackets with metal injection molding (MIM) technology and welded bases: in vitro study [J]. Open Dent J, 2020, 14:240-246.
[20] Kulkarni G, Nimbark S, Sah S, et al. The influence of orthodontic bracket base diameter and mesh size on bond strength [J]. Popul Ther Clin Pharmacol, 2023, 30(17): 1010-1015.
[21] Rosidin RF, Alfiandini RN, Narmada IB, et al. Comparison between shear strength in total etch and self etch adhesive material in bonding of stainless-steel brackets [J]. Research Journal of Pharmacy and Technology, 2023, 16(6): 2991-2998.
[22] Sivakumar N, Srinivasan D, Chakravarthi S, et al. Effect of ethyl alcohol wet bonding on shear bond strength in orthodontic brackets-An in vitro study [J]. J Pharm Bioallied Sci, 2023, 15(Suppl 1): S377-S382.