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首页> 外文期刊>The Journal of Prosthetic Dentistry >Ultrasonic versus high-speed cavity preparation: analysis of increases in pulpal temperature and time to complete preparation.
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Ultrasonic versus high-speed cavity preparation: analysis of increases in pulpal temperature and time to complete preparation.

机译：超声波与高速腔制备：分析牙髓温度升高和完成制备所需的时间。

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STATEMENT OF PROBLEM: The use of ultrasonic tips has become an alternative for cavity preparation. However, there are concerns about this type of device, particularly with respect to intrapulpal temperatures and cavity preparation time. PURPOSE: The purpose of this study was to analyze pulpal temperature increases generated by an ultrasonic cavity preparation with chemical vapor deposition (CVD) tips, in comparison to preparation with a high-speed handpiece with a diamond rotary cutting instrument. The time required to complete the cavity preparation with each system was also evaluated. MATERIAL AND METHODS: Thermocouples were positioned in the pulp chamber of 20 extracted human third molars. Slot-type cavities (3 x 3 x 2 mm) were prepared on the buccal and the lingual surfaces of each tooth. The test groups were: high-speed cavity preparation with diamond rotary cutting instruments (n=20) and ultrasonic cavity preparation with CVD points (n=20). During cavity preparation, the increases in pulpal temperature, and the time required for the preparation, were recorded and analyzed by Student's t test for paired samples (alpha=.05). RESULTS: The average pulpal temperature increases were 4.3 degrees C for the high-speed preparation and 3.8 degrees C for the ultrasonic preparation, which were statistically similar (P=.052). However, significant differences were found (P<.001) for the time expended (3.3 minutes for the high-speed bur and 13.77 minutes for the ultrasound device). CONCLUSIONS: The intrapulpal temperatures produced during cavity preparation by ultrasonic tips versus high-speed bur preparation were similar. However, the use of the ultrasonic device required 4 times longer for the completion of a cavity preparation.
机译：问题陈述：超声头的使用已成为腔体准备的替代方法。然而，关于这种类型的装置存在关注，特别是关于肺内温度和腔准备时间。目的：本研究的目的是分析与使用带有金刚石旋转切割仪的高速机头相比，采用化学气相沉积（CVD）尖端的超声腔制备所产生的牙髓温度升高。还评估了完成每个系统的型腔准备所需的时间。材料与方法：将热电偶置于20个提取的人类第三磨牙的牙髓腔中。在每个牙齿的颊侧和舌侧准备了狭缝型腔体（3 x 3 x 2 mm）。测试组是：用金刚石旋转切割仪进行高速型腔准备（n = 20）和使用CVD点进行超声型腔准备（n = 20）。在腔制备过程中，记录了牙髓温度的升高以及制备所需的时间，并通过学生的t检验对配对样品进行了分析（alpha = .05）。结果：高速制备的平均纸浆温度升高为4.3摄氏度，超声制备的平均纸浆温度升高为3.8摄氏度，在统计学上相似（P = .052）。但是，在所花费的时间上发现了显着差异（P <.001）（高速钻针为3.3分钟，超声设备为13.77分钟）。结论：超声针头与高速车针的腔制备过程中产生的肺内温度相似。但是，使用超声波装置需要4倍的时间才能完成腔体的制备。

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