Debonding forces of a bioactive material compared with those of resin-based and glass ionomer-based orthodontic adhesives

AJO-DO clinical companion Pub Date : 2024-04-01 DOI:10.1016/j.xaor.2024.01.002

Kyla M. Swearingen , Nicholas Merwin , James L. McKay , Daranee Tantbirojn , Wanda I. Claro , Richard A. Williams , Antheunis Versluis

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Abstract

Introduction

This study investigated if a bioactive material used for bonding orthodontic brackets had bond strength comparable to a conventional resin-based adhesive in combination with the potential of reducing white spot lesions like a glass ionomer-based adhesive.

Methods

Brackets were bonded to 90 premolars, extracted for orthodontic purposes, with a bioactive, conventional resin-based, or glass ionomer material. Brackets were debonded by a shear force using a universal testing machine after 24 hours or after artificial aging (thermocycling) with or without subsequent acid challenge. Removal forces were compared among the 9 groups (n = 10/group). After debonding, adhesive remnants were indexed, and the demineralization around the brackets was measured. In addition, the diametral tensile strength of each material was determined.

Results

Materials (bioactive, conventional, and glass ionomer) had a significant effect on debonding forces (P <0.001; 2-way analysis of variance), whereas conditions (24-hour, aged, and aged + acid challenged) had no significant effect (P = 0.811). Bond strengths correlated positively with diametral tensile strengths (r = 0.67). The bioactive material generally had bond strengths comparable with those of the conventional adhesive and higher than those of the glass ionomer. Surface demineralization with the bioactive adhesive was similar when compared with that of the glass ionomer group and significantly lower than that of the conventional adhesive group (P <0.001). Significantly less adhesive remnant was left by the bioactive resin in the aged + acid-challenged group (P = 0.001).

Conclusions

Debonding forces for brackets bonded with the bioactive resin were comparable to those of a conventional orthodontic adhesive. In vitro, the bioactive resin showed the potential to reduce demineralization around the brackets, similar to glass ionomer cement.

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生物活性材料与树脂基和玻璃离聚体基正畸粘合剂的脱粘力比较。

简介：本研究调查了一种用于粘接正畸托槽的生物活性材料的粘接强度是否与传统的树脂基粘合剂相当，同时是否有可能像玻璃离聚体基粘合剂一样减少白斑病变。方法用生物活性材料、传统树脂基材料或玻璃离聚体材料将托槽粘接在 90 颗为正畸目的拔出的前臼齿上。在 24 小时后或人工老化（热循环）后，使用万能试验机通过剪切力对托槽进行脱粘，无论随后是否进行酸挑战。对 9 组（n = 10/组）的脱落力进行比较。脱钩后，对残余粘合剂进行索引，并测量托槽周围的脱矿情况。结果材料（生物活性材料、传统材料和玻璃离聚体）对剥离力有显著影响（P <0.001；2 向方差分析），而条件（24 小时、老化和老化 + 酸挑战）没有显著影响（P = 0.811）。粘接强度与直径拉伸强度呈正相关（r = 0.67）。生物活性材料的粘接强度一般与传统粘接剂相当，高于玻璃离聚体。生物活性粘合剂的表面脱矿情况与玻璃离聚体组相似，明显低于传统粘合剂组（P <0.001）。结论使用生物活性树脂粘接的托槽的脱粘力与传统正畸粘接剂的脱粘力相当。在体外，生物活性树脂显示出减少托槽周围脱矿的潜力，与玻璃离子粘结剂类似。

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

AJO-DO clinical companion Dentistry, Oral Surgery and Medicine

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审稿时长

73 days