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Detection of Bisphenol A in dental wastewater after grinding of dental resin composites.
Dental Materials ( IF 5 ) Pub Date : 2020-06-04 , DOI: 10.1016/j.dental.2020.04.025
Olga Polydorou 1 , Ole-Christian Schmidt 1 , Mathias Spraul 1 , Kirstin Vach 2 , Simon Daniel Schulz 3 , Armin König 4 , Elmar Hellwig 1 , Richard Gminski 4
Affiliation  

Objectives

This study evaluated the release of bisphenol A (BPA) in wastewater after grinding of resin composites and tested three filtration materials.

Methods

Three resin composites (Ceram X, Filtek Supreme XTE and Core-X flow) were used. Samples (5 mm × 2 mm, n = 10) were prepared using a metal mold and were polymerized for 20 s according to manufacturers’ instructions. A dental unit was disconnected from wastewater circulation and composite samples were ground under standardized procedures (200,000 rpm; 90 s). Wastewater was collected in glass bottles. Water samples were collected as control by performing the same procedure without grinding resin composite. All samples were stored at 7 °C for 6 months to simulate storage. Then they were analyzed by HPLC–FLD. Three filtration materials (Zeosorb, Katalox Light and Catalytic Carbon) were used for water treatment to remove BPA. BPA-water solutions were prepared; corresponding to the highest amount released by the resin composites. These solutions were analyzed before and after filtration by HPLC–FLD and their efficacy (%) was calculated.

Results

BPA was detected in all composite solutions: Ceram X and Filtek Supreme XTE showed similar findings (p > 0.05) which were significantly higher than the control (p < 0.001) and Core-X flow (p = 0.001). The efficacy of the filtration materials was: Katalox Light (5.09%) < Zeosorb (7.91%) < Catalytic Carbon (99.38%). Only Catalytic Carbon caused a clinically significant reduction of BPA (p < 0.05).

Significance

BPA can be released in wastewater during dental procedures. This release seems to be material dependent. Among the filtration methods tested, Catalytic carbon seems to be effective for BPA reduction in water.



中文翻译:

牙科树脂复合材料研磨后,在牙科废水中检测双酚A。

目标

这项研究评估了研磨树脂复合材料后废水中双酚A(BPA)的释放,并测试了三种过滤材料。

方法

使用了三种树脂复合材料(Ceram X,Filtek Supreme XTE和Core-X flow)。样品(5 mm×2 mm,n = 10)使用金属模具制备,并根据制造商的说明聚合20秒。将牙科设备与废水循环系统断开,然后按照标准程序(200,000 rpm; 90 s)研磨复合样品。废水收集在玻璃瓶中。在不研磨树脂复合材料的情况下,通过执行相同的步骤收集水样品作为对照。将所有样品在7°C下存储6个月以模拟存储。然后通过HPLC-FLD对其进行分析。三种过滤材料(Zeosorb,Katalox Light和Catalytic Carbon)用于水处理以去除BPA。制备了双酚A水溶液。对应于树脂复合材料释放的最高量。通过HPLC-FLD在过滤前后对这些溶液进行分析,并计算其功效(%)。

结果

在所有复合溶液中均检测到BPA:Ceram X和Filtek Supreme XTE表现出相似的发现(p  > 0.05),显着高于对照(p  <0.001)和Core-X流量(p  = 0.001)。过滤材料的功效为:Katalox Light(5.09%)<Zeosorb(7.91%)<Catalytic Carbon(99.38%)。临床上只有催化碳可导致BPA显着降低(p  <0.05)。

意义

在牙科手术过程中,双酚A可以释放到废水中。此版本似乎与材料有关。在测试的过滤方法中,催化碳似乎对减少水中的BPA有效。

更新日期:2020-07-10
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