In vitro evaluation of surface characteristics comparing WaterLase (Biolase®) with tungsten carbide burs for composite removal: a pilot study

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

Australasian Orthodontic Journal Pub Date : 2022-01-01 DOI:10.2478/aoj-2022-0022

Mohammed Alkandari, S. Abela, Alessandra Booth, D. Bister

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Abstract

Abstract Introduction The present ex-vivo study was designed to evaluate the surface roughness and analyse potential adhesive remnants on the enamel surface after composite removal using either an Er:YSGG WaterLase (WL) (Biolase®, Irvine, CA, USA) or a tungsten carbide (TC) bur (Alston, England, UK). Methods An in vitro study was designed using 21 extracted lower premolars. Pre-coated stainless steel brackets (3M Unitek, Monrovia, CA, USA) were bonded on all of the teeth except one, which served as a control. The teeth were allocated into two groups: Group 1 (n = 5), removal of composite with a TC bur. Group 2 (n = 15), removal of composite using the WL. Scanning electron microscope (SEM) imaging and Energy Dispersive X-ray Spectroscopy (EDS) were used to determine the surface roughness and atomic composition of the surfaces. Results Group 1 had a median damage depth of 17.6 µm with a range between 11.5 µ m and 28.7 µ m. Group 2 had a median damage depth of 166.3 µ m, with a range between 86.6 to 263.1 µ m. The depth differences between the two groups were statistically significant (p < 0.001, Mann–Whitney test). The atomic composition of the WL group was similar to sound enamel. The TC group showed a quantitative increase in carbon and silicone by 38.2% and 11.5%, respectively, a decrease in oxygen by 44.1% and an absence of phosphorous and calcium. Conclusion WL is efficient at removing composite from the enamel surface but could result in increased enamel surface roughness in comparison with conventional TC burs.

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比较WaterLase (Biolase®)和碳化钨毛刺去除复合材料的表面特性的体外评估:一项试点研究

摘要简介本体外研究旨在评估表面粗糙度，并分析使用Er:YSGG WaterLase（WL）（Biolase®，Irvine，CA，USA）或碳化钨（TC）钻头（Alston，England，UK）去除复合材料后牙釉质表面潜在的粘合剂残留。方法对21颗拔除的下前磨牙进行体外实验研究。将预涂不锈钢托槽（3M Unitek，蒙罗维亚，CA，USA）粘合在除一颗作为对照的牙齿外的所有牙齿上。将牙齿分为两组：第1组（n=5），用TC钻去除复合材料。第2组（n=15），使用WL去除复合物。利用扫描电子显微镜（SEM）成像和能谱仪（EDS）测定了表面粗糙度和原子组成。结果第1组的中位损伤深度为17.6µm，范围在11.5µm至28.7µm之间。WL组的原子组成与声音釉质相似。TC组的碳和硅含量分别增加了38.2%和11.5%，氧含量减少了44.1%，并且没有磷和钙。结论WL能有效去除釉质表面的复合物，但与传统的TC囊相比，会导致釉质表面粗糙度增加。

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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.