摘要
目的研究Ever Stick高强纤维及不同形式纤维对前牙树脂贴面抗折性能的影响。方法收集30颗新鲜完整的上中切牙,样本随机分为3组制作树脂贴面并粘结。第1组贴面不含高强纤维,第2组贴面内加入Ever Stick单向纤维,第3组贴面内加入Ever Stick双向纤维。经冷热循环后,万能测试机测试所有样本的初始折裂载荷和最终断裂载荷,并分析各组贴面的折裂破坏模式。结果初始折裂载荷3组间无显著差异(P>0.05)。最终断裂载荷,组2、组3无显著差异(P>0.05),均明显高于组1(P<0.05)。组内比较,组2和组3的最终断裂载荷较初始折裂载荷有明显提高(P<0.05)。折裂模式显示,组3贴面70%为可修复的折裂,其他两组多为不可修复折裂。结论 Ever Stick高强纤维有助于提高树脂贴面的最终断裂载荷,双向纤维更利于折裂贴面修补。
Objective To explore the effect of fiber-reinforced composites on the fracture load and fracture mode of resin veneer cemented with different types of fiber-reinforced composite(FRC). Methods 30 maxillary incisors were randomly divided into 3 groups.Group1 was restored with composite veneers. Group 2 was restored with composite veneer reinforced with FRC in one direction. Group 3was restored with composite veneer reinforced with FRC in two directions. All specimens were thermocycled. Initial fracture loads and final fracture loads were tested with a universal testing machine. Fracture modes of different groups were observed and studied. Results For the initial fracture load,there was no statistically significant difference(P>0.05)among the test groups. According to the statistical results,the final fracture loads had no significant difference(P>0.05)between Group 2 and Group 3. The final fracture load of Group1 was significantly lower than Group 2 and Group 3(P<0.05). In Group 2 and Group 3,the final fracture loads were significantly higher than the initial fracture loads(P< 0.05). Repairable small fractures were observed in most specimens of Group 3,and irreparable fractures were observed in specimens of Group 1 and Group 3. Conclusions FRC is helpful to increase final fracture load of composite resin veneer. And the fractured resin veneer is more convenient to be repaired by the reinforcement of bidirectional FRC.
作者
马春敏
沈晴昳
黄伟昊
卢海红
MA Chunmin;SHEN Qingyi;HUANG Weihao;LU Haihong(Department of Prosthodontics,Shanghai Stomatological Disease Center, Shanghai 200231,China)
出处
《口腔医学》
CAS
2019年第1期11-14,共4页
Stomatology
基金
上海市口腔病防治院院级课题(SSDC-2015-03)
关键词
树脂贴面
高强纤维树脂
折裂载荷
折裂模式
composite veneer
fiber-reinforced composite
fracture load
fracture mode
