Comparison of the shear bond strength of reconditioned metal brackets used in indirect bonding: an in vitro pilot study

IF 0.5 4区医学 Q4 DENTISTRY, ORAL SURGERY & MEDICINE

Australasian Orthodontic Journal Pub Date : 2023-01-01 DOI:10.2478/aoj-2023-0001

Seong-sik Kim, Youn-kyung Choi, Yong-il Kim, Soo-Byung Park, Sunghuen Kim

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Abstract

Abstract Objectives: This study aimed to compare the shear bond strength (SBS) related to surface treatment methods of debonded brackets before indirect rebonding and to evaluate changes in SBS related to sandblasting time. Methods: After brackets were debonded from a dental cast during an indirect bonding procedure, seven groups were assigned to conduct SBS tests. Sandblasted groups were sprayed with Al2O3 for 3 s (Group II), 6 s (Group III), 9 s (Group IV), and 12 s (Group V). In Group VI, a no. 4 round low-speed bur was used to remove resin. In Group VII, the bracket base was coated with a plastic conditioner (Reliance, IL, USA) and Group I served as the control group. Results: The SBS of Group VII was not statistically different from that of the control group. The SBS of Group VI was not statistically different from that of Group II but higher than that of the control group (P < 0.05). There was no statistical difference between Groups III, IV, and V, but was greater than the other groups (P < 0.05). Conclusion: The group with surface treatment by sandblasting for more than 6 sec prior to indirect bonding recorded a higher SBS than the other groups. The SBS did not increase further even if the sandblasting time increased by more than 9 sec.

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间接粘接中修复金属支架剪切强度的比较:一项体外试验研究

摘要目的:本研究旨在比较间接再粘接前脱粘支架表面处理方法与剪切粘接强度(SBS)的关系，并评价SBS与喷砂时间的关系。方法:在间接粘接过程中，托槽从牙模上脱粘后，分配七组进行SBS测试。喷砂组分别喷Al2O3 3 s (II组)、6 s (III组)、9 s (IV组)、12 s (V组)。采用4型低速滚筒去除树脂。在第七组，支架底座涂有塑料调理剂(Reliance, IL, USA)，第一组为对照组。结果:第七组SBS与对照组比较，差异无统计学意义。第六组的SBS与第二组比较差异无统计学意义，但高于对照组(P < 0.05)。III、IV、V组间比较差异无统计学意义，但高于其他组(P < 0.05)。结论:间接粘接前表面喷砂处理超过6秒组的SBS高于其他组。即使喷砂时间增加9秒以上，SBS也没有进一步增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Australasian Orthodontic Journal Dentistry-Orthodontics

CiteScore

0.80

自引率

25.00%

发文量

期刊介绍： The Australasian Orthodontic Journal (AOJ) is the official scientific publication of the Australian Society of Orthodontists. Previously titled the Australian Orthodontic Journal, the name of the publication was changed in 2017 to provide the region with additional representation because of a substantial increase in the number of submitted overseas'' manuscripts. The volume and issue numbers continue in sequence and only the ISSN numbers have been updated. The AOJ publishes original research papers, clinical reports, book reviews, abstracts from other journals, and other material which is of interest to orthodontists and is in the interest of their continuing education. It is published twice a year in November and May. The AOJ is indexed and abstracted by Science Citation Index Expanded (SciSearch) and Journal Citation Reports/Science Edition.