Klironomos Theodoros, Katsimpali Aspasia, Polyzois Gregory
Dentist, Private practice, Athens, Greece.
Professor, Department of Removable Prosthodontics, Dental School, University of Athens, Athens, Greece.
Acta Stomatol Croat. 2015 Sep;49(3):242-53. doi: 10.15644/asc49/3/7.
The aim of this paper was to overview the current scientific knowledge concerning the effect of microwave disinfection on denture related material properties. Cross-infection control in dentistry is a significant issue in everyday clinical practice due to the recent increase in some infectious diseases such as hepatitis B, C and AIDS and therefore numerous methods of disinfection have been used. The most widespread method of disinfection used in everyday practice is chemical, however, studies have suggested that chemical disinfectants alter the physical and mechanical properties of the acrylic resins and enable the growth and proliferation of certain bacteria. Therefore, microwaves were introduced as an easy to use-and-access, low cost, chemical free alternative. The question that arose was if and in what way the microwave irradiation affected the denture related material properties. Microwaving affects the denture resin bases, liners and teeth in different ways. The results showed that microwave disinfection could be a safe alternative for the disinfection of denture bases and liners compared to the chemical one, when the procedure is carried out in dry conditions, but could possibly cause dimensional changes of clinical significance on them when the irradiation takes place in wet environment. It also seems to have no detrimental effects of clinical importance on the flexural properties, impact strength and hardness of denture resins and the bond, flexural strength, porosity and hardness of denture liners. The effects of microwave disinfection on the hardness of denture teeth and teeth/denture bond strength are still controversial and no safe conclusions can be drawn.
本文旨在综述当前关于微波消毒对义齿相关材料性能影响的科学知识。由于近期乙型、丙型肝炎及艾滋病等一些传染病的增加，牙科中的交叉感染控制在日常临床实践中是一个重要问题，因此已采用了多种消毒方法。日常实践中最广泛使用的消毒方法是化学消毒，然而，研究表明化学消毒剂会改变丙烯酸树脂的物理和机械性能，并能使某些细菌生长和繁殖。因此，微波作为一种易于使用和获取、低成本且无化学物质的替代方法被引入。出现的问题是微波辐射是否以及以何种方式影响义齿相关材料的性能。微波对义齿树脂基托、衬垫和牙齿有不同的影响。结果表明，与化学消毒相比，当在干燥条件下进行操作时，微波消毒对于义齿基托和衬垫的消毒可能是一种安全的替代方法，但当在潮湿环境中进行辐射时，可能会导致义齿基托和衬垫出现具有临床意义的尺寸变化。微波消毒似乎对义齿树脂的挠曲性能、冲击强度和硬度以及义齿衬垫的粘结性、挠曲强度、孔隙率和硬度也没有具有临床重要性的有害影响。微波消毒对义齿牙齿硬度和牙齿/义齿粘结强度的影响仍存在争议，无法得出可靠结论。
