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首页> 外文期刊>The Journal of Prosthetic Dentistry >Pilot study of the effects of three bonding systems on the torsional resistance of a titanium-reinforced composite core.
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Pilot study of the effects of three bonding systems on the torsional resistance of a titanium-reinforced composite core.

机译：三种粘结体系对钛增强复合材料芯抗扭强度影响的试验研究。

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STATEMENT OF PROBLEM: There are no studies analyzing the effects of a bonding agent on torsional resistance for a titanium-reinforced core material bonded with a multistep bonding system. PURPOSE: This pilot study investigated the effects of multistep bonding agents on torsional resistance of a titanium-reinforced composite core material (Ti-Core core material). MATERIAL AND METHODS: A total of 40 recently extracted human molars with their crowns removed were placed into acrylic resin blocks and divided into 4 groups of 10 specimens. Only multistep bonding systems were used (AllBond-2, ScotchBond Multi- PURPOSE: Tenure A&B, and the control without bonding agent). Specimens were prepared according to manufacturer's instructions. The control group was etched with a 37.5% phosphate acid. All cores were fabricated with Ti-Core titanium core material with No. 1 hard copper bands as the matrix. Ti-Core core material was applied and allowed to cure for 1 hour, then the cores were placed in 100% humidity (water) for 1 week. Test specimens were placed in a special jig and a clockwise torsional force applied. Torsional force was measured on a Lebow 1102-200 torque transducer and recorded on a Hewlett Packard 7015B X-Y recorder in inch x ounce then converted into Newton-meter. One-way analysis of variance (ANOVA) was used to test for statistical significance (P <.05). RESULTS: Torsional values (Newton-meter) were AllBond-2, 0.1980, ScotchBond Multi- PURPOSE: 0.1890, Tenure A&B, 0.2142; the control group recorded a value of zero. Statistical analysis revealed that bonding systems did not differ from one another. CONCLUSION: Use of a bonding agent increased the core's resistance to torsional forces. Lack of a bonding agent dramatically reduced the resistance to torque.
机译：问题陈述：没有研究分析粘合剂对通过多步粘合系统粘合的钛增强芯材的抗扭强度的影响。目的：该初步研究调查了多步粘合剂对钛增强复合芯材（Ti-Core芯材）的抗扭强度的影响。材料与方法：将总共40颗最近摘除的人类臼齿的牙冠取下，放入丙烯酸树脂块中，分成4组，每组10个标本。仅使用了多步粘合系统（AllBond-2，ScotchBond Multi-PURPOSE：终身制A＆B和不含粘合剂的对照）。根据制造商的说明制备样品。对照组用37.5％的磷酸蚀刻。所有芯线均以Ti-Core钛芯材料（以1号硬铜带为基体）制造。涂覆Ti-Core芯材并使其固化1小时，然后将芯置于100％湿度（水）中1周。将试样放置在专用夹具中，并施加顺时针扭转力。在Lebow 1102-200扭矩传感器上测量扭力，并在Hewlett Packard 7015B X-Y记录仪上以英寸x盎司为单位进行记录，然后将其转换为牛顿米。单向方差分析（ANOVA）用于检验统计显着性（P <.05）。结果：扭转值（牛顿米）为AllBond-2，0.1980，ScotchBond Multi-目的：0.1890，保有权A＆B，0.2142;对照组记录为零。统计分析表明，键合系统之间没有什么不同。结论：使用粘合剂增加了磁芯对扭转力的抵抗力。缺乏粘合剂会大大降低抗扭矩性。

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