Goel Kashish, Gupta Rupesh, Solanki Jitender, Nayak Meghanand
Prosthodontist, Ex PG Kothiwal Dental College and Hospital , Moradabad, India .
Orthodontist, Ex PG Kothiwal Dental College and Hospital , Moradabad, India .
J Clin Diagn Res. 2014 Apr;8(4):ZC42-6. doi: 10.7860/JCDR/2014/8578.4274. Epub 2014 Apr 15.
Prosthodontic procedures involving dental impressions, stone casts, record bases and prostheses may cause transmission of microorganisms between the patient, the dentist, auxiliary staff and laboratory personnel. In recent times, microwave radiation has gained wider acceptance in the field of applied science and has been used to reduce concentrations of bacteria and fungi, to dry dental casts,and to sterilize preparation media.
This in-vitro study was conducted to compare microwave irradiation and 0.07% sodium hypochlorite chemical disinfection. The study also evaluated the effect of microwave irradiation and 0.07% sodium hypochlorite chemical disinfection on the dimensional stability of Kalstone casts.
Forty impressions were made and divided into two groups of 20 each. Each group was contaminated with Staphylococcus aureus and Pseudomonas aeruginosa respectively. Each impression was divided into three parts and marked A, B, C. Impressions were then poured in kalastone. Part A of 20 kalastone casts were microwave disinfected, and Part B were chemically disinfected (0.07% NaOCl) while Part C were not disinfected and used as control.
On comparing the significant difference was seen in the microbial load between microwave and chemical disinfection (Z=56.480; p<0.001).
On the basis of observations made for the antimicrobial assessment the microwave irradiated Kala stone casts proved to be a better disinfection method when compared with 0.07% sodium hypochlorite chemically disinfected incorporated cast. No significant difference was seen in the dimensional stability of Kala stone discs.
涉及牙印模、石膏模型、记录基托和修复体的口腔修复程序可能会导致微生物在患者、牙医、辅助人员和实验室人员之间传播。近年来，微波辐射在应用科学领域得到了更广泛的认可，并已用于降低细菌和真菌的浓度、干燥石膏模型以及对制备介质进行消毒。
本体外研究旨在比较微波辐照和0.07%次氯酸钠化学消毒。该研究还评估了微波辐照和0.07%次氯酸钠化学消毒对Kalstone模型尺寸稳定性的影响。
制作40个印模，分为两组，每组20个。每组分别被金黄色葡萄球菌和铜绿假单胞菌污染。每个印模分为三部分，标记为A、B、C。然后将印模灌注成Kalstone模型。20个Kalstone模型的A部分进行微波消毒，B部分进行化学消毒（0.07% NaOCl），而C部分不消毒作为对照。
比较发现，微波消毒和化学消毒之间的微生物负荷存在显著差异（Z = 56.480；p < 0.001）。
基于抗菌评估的观察结果，与0.07%次氯酸钠化学消毒的组合模型相比，微波辐照的Kalstone模型被证明是一种更好的消毒方法。Kalstone模型盘的尺寸稳定性没有显著差异。
