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首页> 外文期刊>The Journal of Prosthetic Dentistry >Hardness and surface roughness of reline and denture base acrylic resins after repeated disinfection procedures.
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Hardness and surface roughness of reline and denture base acrylic resins after repeated disinfection procedures.

机译：经过反复消毒后，线基义齿和义齿基丙烯酸树脂的硬度和表面粗糙度。

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STATEMENT OF PROBLEM: Microwave irradiation and immersion in chemical solutions have been recommended for denture disinfection. However, the effect of these procedures on the surface characteristics of denture base and reline resins has not been completely evaluated. PURPOSE: The purpose of this study was to evaluate the effect of microwave and chemical disinfection on the Vickers hardness (VHN) and surface roughness (Ra, microm) of 2 hard chairside reline resins (Kooliner, DuraLiner II), and 1 heat-polymerizing denture base resin (Lucitone 550). MATERIAL AND METHODS: Specimens (12 x 12 x 3 mm) were divided into 2 control and 4 test groups (n=8). Hardness and roughness measurements were performed after: polymerization and immersion in water (37 degrees C) for 7 days (controls), or repeated exposure to disinfection by immersion in sodium perborate (50 degrees C/10 min) or microwave irradiation (650 W/6 min). Measurements of surface roughness (Ra, microm) and hardness (kg/mm(2)) were analyzed using 3-way ANOVA and Tukey's Honestly Significant Difference (HSD) test (alpha=.05). RESULTS: Microwave and chemical disinfection increased the mean (SD) hardness of Kooliner (from 4.1 to 7.5 kg/mm(2)) and DuraLiner II (from 2.6 to 5.6 kg/mm(2)), whereas Lucitone 550 (14.4 kg/mm(2)) remained unaffected. Disinfection by immersion in sodium perborate increased the surface roughness of DuraLiner II (from 0.13 to 0.26 microm) and Kooliner (from 0.16 to 0.26 microm), regardless of the number of cycles. For Lucitone 550, an increase in roughness was observed after 2 cycles of chemical disinfection (from 0.12 to 0.26 microm). Two cycles of microwave disinfection increased the roughness of both reline resins (DuraLiner II: from 0.13 to 0.22 microm; Kooliner: from 0.16 to 0.24 microm), whereas repeated microwave disinfection increased the roughness of DuraLiner II (from 0.11 to 0.25 microm). CONCLUSIONS: Disinfection by immersion in sodium perborate or microwave irradiation did not adversely affect the hardness of all materials evaluated. The effect of both disinfection methods on the roughness varied among materials.
机译：问题陈述：建议将微波辐射和浸入化学溶液中进行义齿消毒。但是，这些步骤对义齿基托和修补树脂的表面特性的影响尚未完全评估。目的：本研究的目的是评估微波和化学消毒对两种硬质椅旁树脂（Kooliner，DuraLiner II）和一种热聚合树脂的维氏硬度（VHN）和表面粗糙度（Ra，微米）的影响。义齿基料树脂（Lucitone 550）。材料与方法：将标本（12 x 12 x 3 mm）分为2个对照组和4个测试组（n = 8）。在以下条件下进行硬度和粗糙度测量：聚合并浸入水（37摄氏度）中7天（对照），或通过浸入过硼酸钠（50摄氏度/ 10分钟）或微波辐射（650 W / 6分钟）。使用3向ANOVA和Tukey的诚实显着性差异（HSD）测试（alpha = .05）分析了表面粗糙度（Ra，microm）和硬度（kg / mm（2））的测量值。结果：微波和化学消毒使Kooliner（DurLiner II）的平均（SD）硬度从4.1增至7.5 kg / mm（2）和DuraLiner II（2.6增至5.6 kg / mm（2）），而Lucitone 550（14.4 kg / mm（2））仍然不受影响。浸入过硼酸钠中进行消毒可增加DuraLiner II（从0.13到0.26微米）和Kooliner（从0.16到0.26微米）的表面粗糙度，而与循环次数无关。对于Lucitone 550，经过2次化学消毒（从0.12到0.26微米）后，观察到粗糙度增加。两次微波消毒增加了两种树脂的粗糙度（DuraLiner II：从0.13到0.22微米; Kooliner：从0.16到0.24微米），而反复的微波消毒则增加了DuraLiner II的粗糙度（从0.11到0.25微米）。结论：浸入过硼酸钠或微波辐射消毒不会对所有评估材料的硬度产生不利影响。两种消毒方法对粗糙度的影响因材料而异。

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