Fracture resistance of maxillary complete dentures subjected to long-term water immersion

Fracture resistance of maxillary complete dentures subjected to long-term water immersion
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DOI：
10.1111/j.1741-2358.2012.00616.x
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发表时间：
2012-06-01
期刊：
GERODONTOLOGY
影响因子：
2
通讯作者：
Shimizu, Hiroshi
Shimizu, Hiroshi
中科院分区：
医学3区
文献类型：
--
作者：
Takahashi, Yutaka;Yoshida, Kaneyoshi;Shimizu, Hiroshi

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上颌全口义齿在长期水浸泡条件下的抗折性能研究目的：研究长期浸水条件下上颌丙烯酸树脂全口义齿的抗折性能。材料与方法：选用5种基托树脂制作上颌全口义齿。其中一半义齿在水中保存50小时，另一半在水中保存180天后进行测试。每组制作10个试件。结果：双因素方差分析显示，义齿基托材料的变化对义齿比例极限挠曲载荷有显著影响。由于水浸泡效应以及水浸泡效应与义齿基托材料的交互作用，FL-PL差异无统计学意义。两种常规热处理树脂、浇注型自聚树脂和微波能量处理树脂制作的义齿FL-PL差异无统计学意义，其FL-PL显著高于光敏树脂。结论：上颌丙烯酸树脂全口义齿长期浸水后FL-PL无明显变化，而光活化树脂制作的义齿FL-PL低于其他材料。
Fracture resistance of maxillary complete dentures subjected to long-term water immersionObjective: This study investigated the fracture resistance of maxillary acrylic resin complete dentures subjected to long-term water immersion.Materials and Methods: Maxillary acrylic resin complete dentures were fabricated from five denture base resins. Half of the dentures were stored in water for 50 h, and the other half were kept in water for 180 days before testing. Ten specimens were fabricated per group. The flexural load at the proportional limit (FL-PL) of the dentures was tested.Results: A two-way ANOVA revealed a significant difference in FL-PL because of the denture base material variable. There were no significant differences in FL-PL because of the effect of water immersion and the interaction between the effect of water immersion and the denture base material. The FL-PLs of the dentures fabricated with the two conventional heat-processed resins, the pour-type autopolymerizing resin and the microwave energy-processed resin were not significantly different from each other; they were significantly higher than the light-activated resin in regard to their FL-PL.Conclusion: The FL-PLs of the maxillary acrylic resin complete dentures did not change after long-tern water immersion, and the FL-PL of the denture fabricated from the light-activated resin was lower than those of the other materials.