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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of surface treatments and cyclic loading on the bond strength of acrylic resin denture teeth with autopolymerized repair acrylic resin.
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Effect of surface treatments and cyclic loading on the bond strength of acrylic resin denture teeth with autopolymerized repair acrylic resin.

机译：表面处理和循环载荷对丙烯酸树脂假牙与自聚合修复丙烯酸树脂粘结强度的影响。

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STATEMENT OF PROBLEM: Fracture of denture teeth from the denture base is a common problem associated with dental prostheses. Fractured tooth surfaces treated with chemical agents and mechanical features have the potential for improved repair strength. PURPOSE: The purpose of this study was to compare bond strengths of denture teeth to autopolymerized repair acrylic resin after various surface treatments, before and after cyclic loading. MATERIAL AND METHODS: Mandibular lateral incisor denture teeth were selected and ground on the ridge-lap portion using a standardized jig. Specimens with a ground surface were used as controls. The experimental groups included: ground plus airborne-particle abraded, ground plus diatoric recess, and ground plus an experimental bonding agent. The teeth were affixed by an autopolymerized repair acrylic resin to denture bases. Specimens (n=10) were subjected to compression testing (5 mm/min) at a 135-degree angle, before and after 14,400 loading cycles at 2 Hz and 22 N. Peak load to dislodgement was recorded and statistically analyzed (2-way ANOVA, Tukey HSD, alpha=.05). The specimens were then examined using x10 magnification, and fractures were categorized as adhesive, cohesive, or mixed. RESULTS: The mean bond strengths ranged from 26.3 N to 44.2 N. There were no significant differences in fatigue versus nonfatigue strength values within each group (P=.244). Significant strength differences were found (P<.001) between the ground control, diatoric recess, and bonding agent groups. Microscopic examination revealed that the bonding agent group obtained the highest percentage of mixed-type fractures. CONCLUSIONS: The use of a bonding agent and the placement of a diatoric recess in the denture tooth resulted in higher bond strengths than grinding alone. Cyclic loading had no significant impact on the bond strength of denture teeth to the autopolymerized repair acrylic resin.
机译：问题陈述：假牙基托中的假牙断裂是与假牙相关的常见问题。用化学剂和机械特征处理过的断裂牙齿表面有可能提高修复强度。目的：本研究的目的是比较在进行各种表面处理后，循环加载前后，假牙与自聚修复丙烯酸树脂的粘结强度。材料与方法：选择下颌侧切牙义齿，并使用标准夹具在ridge一圈部分磨削。将具有地面的样品用作对照。实验组包括：研磨+气载颗粒磨蚀，研磨+扩张槽，研磨+实验粘合剂。用自动聚合的修补丙烯酸树脂将牙齿固定在义齿基托上。在2 Hz和22 N的14,400次加载循环之前和之后，以135度角对样品（n = 10）进行压缩测试（5 mm / min）。记录下位移的峰值载荷并进行统计分析（2向方差分析，Tukey HSD，alpha = .05）。然后使用x10放大倍率检查标本，并将裂缝分类为粘附，粘结或混合。结果：平均粘结强度范围为26.3 N至44.2N。各组之间的疲劳强度和非疲劳强度值均无显着差异（P = .244）。发现在地面控制层，扩张槽和粘合剂组之间存在显着的强度差异（P <.001）。显微镜检查显示，粘合剂组获得了混合型断裂的最高百分比。结论：与单独研磨相比，使用粘合剂和在义齿中放置扩张齿凹槽可产生更高的粘合强度。循环载荷对义齿与自聚合修复丙烯酸树脂的粘结强度没有显着影响。

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