Karlovic Zoran, Pezelj-Ribaric Sonja, Miletic Ivana, Jukic Silvana, Grgurevic Josko, Anic Ivica
Department of Endodontics and Restorative Dentistry, School of Dental Medicine, Gundulićeva 5, 10,000 Zagreb, Croatia.
J Endod. 2005 Nov;31(11):821-3. doi: 10.1097/01.don.0000158234.33581.e9.
The aim of this in vitro study was to compare the sealing effectiveness of the Erbium:YAG laser to the sealing effectiveness of an ultrasonic device in the preparation of similar retrograde cavities using different retrograde filling materials. After root-canal instrumentation and filling, apices of 60 single-rooted teeth were resected. Retrograde class I cavities 3 mm deep were prepared using an ultrasonic device (group A) and Er:YAG laser (group B). An ultrasonic unit was used with CT-5 retrotip at the frequency of 32 KHz. Laser beam parameters were a pulse of very short duration (100 micros), energy of 280 mJ, and repetition rate of 10 Hz. Cavities of each group of 10 samples were filled with mineral trioxide aggregate (MTA), Super-EBA, and IRM. Microleakage was measured using a fluid transport model. The results showed that cavities prepared with Er:YAG laser have significantly lower microleakage for all tested materials.
本体外研究的目的是比较铒激光与超声设备在使用不同的倒充填材料制备相似倒凹洞形时的封闭效果。在进行根管预备和充填后，切除60颗单根牙的根尖。使用超声设备（A组）和铒激光（B组）制备深度为3mm的I类倒凹洞形。超声设备使用频率为32kHz的CT-5倒凹头。激光束参数为极短脉冲持续时间（100微秒）、能量280mJ、重复频率10Hz。每组10个样本的洞形分别用三氧化矿物凝聚体（MTA）、Super-EBA和IRM进行充填。使用液体渗透模型测量微渗漏。结果显示，对于所有测试材料，用铒激光制备的洞形微渗漏显著更低。
