• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of a fluoride varnish on the margin leakage and retention of luted provisional crowns.
【24h】

Effect of a fluoride varnish on the margin leakage and retention of luted provisional crowns.

机译：氟化物清漆对切缘的临时牙冠的边缘渗漏和保留的影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Statement of problem. Provisional crowns cemented with provisional luting agents are susceptible to washout, margin leakage, and secondary caries when placed for a prolonged period. Purpose. This study was conducted to determine the effect of combining a varnish containing 2.26% NaF with 2 provisional luting agents on the margin leakage and retention of provisional crowns. Material and methods. Acrylic resin provisional crowns were fabricated for 8 shoulder-prepared molars. The eight provisional (N=24) crowns were luted individually with Temp-Bond (TB), Freegenol (FG), or Duraphat (DU). Specimens were thermocycled 500 times (5 degrees and 60 degrees C) with a 1-minute dwell time, stored in 100% relative humidity at 37 degrees C for 6 days, and then immersed in a 0.5% Gentian violet solution for 24 hours. Seven days after cementation, a removal test of the crowns (shear retention test) was conducted with a universal testing machine at a crosshead speed of 5 mm/min. Retention was determined as the maximum recorded force needed for crown dislodgment. DU varnish was applied to the inner surface of the dislodged crowns with no removal of the cement layer TB, FG (N=16). The crowns were relined with a 0.5-mm layer of acrylic resin and luted with a combination of luting agent and DU (TB, FG) N=16. No luting agent (NC) served as the control (N=8). Results were analyzed with the Wilcoxon matched-pairs signed-ranks test. Leakage at the margins was assessed with a 4-level dye penetration scale, and statistical differences were identified with a chi(2) test. All hypothesis testing was conducted at the 95% level of confidence. Results. The mean 7-day retention forces were as follows: 44.5 N (Temp-Bond), 51.6 N (Freegenol), and 35.9 N (Duraphat). There were no significant differences among these values. Duraphat combined with Freegenol decreased the retention of provisional crowns, but Duraphat combined with Temp-Bond increased the retention of provisional crowns by 69-145%. Duraphat alone and in combination with both provisional luting agents significantly reduced margin leakage (P<.05). The least margin leakage was evident when the provisional crowns were luted with Duraphat alone. Conclusion. With regard to retention and margin leakage, the results of this study suggest that Duraphat varnish can be successfully used as provisional luting agent for single provisional crowns.
机译：问题陈述。长时间放置粘合有临时诱剂的临时牙冠容易被冲洗，边缘渗漏和继发龋齿。目的。进行这项研究是为了确定将含有2.26％NaF的清漆与2种临时胶合剂结合在一起对临时牙冠的边缘渗漏和保留效果的影响。材料与方法。丙烯酸树脂临时冠被制造用于8个肩部准备的臼齿。八个临时（N = 24）牙冠分别用Temp-Bond（TB），Freegenol（FG）或Duraphat（DU）吸引。将样品以1分钟的停留时间热循环500次（5度和60摄氏度），在100％相对湿度下于37摄氏度下保存6天，然后浸入0.5％龙胆紫溶液中24小时。固结后7天，用万能试验机以5 mm / min的十字头速度进行牙冠的去除试验（剪切保持试验）。保留力被确定为牙冠移位所需的最大记录力。将DU清漆施涂到脱落的牙冠的内表面上，而没有去除水泥层TB，FG（N = 16）。牙冠用0.5毫米的丙烯酸树脂层衬里，并用浸润剂和DU（TB，FG）N = 16的组合浸润。没有浸润剂（NC）用作对照（N ＝ 8）。结果用Wilcoxon配对配对有符号秩检验进行了分析。使用4级染料渗透等级评估边缘的泄漏，并通过chi（2）测试确定统计差异。所有假设检验均以95％的置信度进行。结果。平均7天保留力如下：44.5 N（临时结合），51.6 N（Freegenol）和35.9 N（Duraphat）。这些值之间没有显着差异。 Duraphat结合Freegenol减少了临时牙冠的保留，但Duraphat结合Temp-Bond却增加了临时牙冠的保留69％至155％。单独使用Duraphat并将其与两种临时诱剂结合使用，可显着减少页边距泄漏（P <.05）。当临时表冠单独用杜拉普哈特（Duraphat）诱惑时，边缘泄漏最少。结论。关于保留和边缘泄漏，这项研究的结果表明，Duraphat清漆可以成功地用作单个临时表冠的临时上光剂。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号