Pereira Key Fabiano Souza, Junqueira-Verardo Lia Beatriz, Zafalon Edilson José, Tomazinho Luiz Fernando, do Nascimento Vanessa Rodrigues, Santos Bastos Hugo José, Otani Alex Yoshiharu
Department of Endodontics, Federal University of Mato Grosso do Sul, Brazil.
Private Practice, Campo Grande, Brazil.
Iran Endod J. 2024;19(3):189-192. doi: 10.22037/iej.v19i3.44817.
Ultrasonic vibration for metallic post removal seems to be a unanimous choice between endodontists and general practitioners for providing the best results and having the highest safety. This study compared the time required by ultrasonic vibration for removing metallic post (MP) when 1 or 2 ultrasonics devices are used.
One hundred and fifteen teeth with MPs from 105 patients, indicated for nonsurgical endodontic retreatment were divided into 2 groups according to the number of ultrasonic devices used (G1-1 device) and (G2-2 devices). In G1, the MP was worn with a transmetal bur, alongside the wear of the cement line (around 2 mm deep). Then, an ultrasonic tip attached to an ultrasonic unit, with a power of 100% was activated at the level of the post, with constant water spray at a level of 1 mm above the axial surface of the tooth. The position of the tip was changed between buccal and lingual surfaces every 10 seconds until the MP was removed. In G2 the same procedures were performed as described in G1, but two ultrasonic tips were activated simultaneously at buccal and lingual surfaces until the MP was removed. The vibration time necessary for removing each MP was recorded using a chronometer.
The mean time was 131.10±29.68 seconds (mean±standard error of the mean) for MP removal using one ultrasonic device, and 24.86±6.88 seconds for two devices. The time required for MP removal using two ultrasonic devices was significantly less than when using one ultrasonic device (<0.001).
The technique with 2 ultrasonic devices proved to be more efficient than the one using only 1 ultrasonic device.
对于金属桩取出而言，超声振动似乎是牙髓病医生和全科医生一致的选择，因为它能提供最佳效果且安全性最高。本研究比较了使用1台或2台超声设备时，超声振动取出金属桩（MP）所需的时间。
选取105例患者的115颗有金属桩且需进行非手术牙髓再治疗的牙齿，根据使用超声设备的数量分为2组（G1组 - 1台设备）和（G2组 - 2台设备）。在G1组中，先用跨金属车针磨损金属桩，同时磨损粘结剂层（约2毫米深）。然后，将功率为100%的超声探头连接到超声设备上，在桩的位置启动，在牙齿轴面上方1毫米处持续喷水。每隔10秒将探头位置在颊面和舌面之间切换，直至金属桩取出。在G2组中，执行与G1组相同的操作，但在颊面和舌面同时启动两个超声探头，直至金属桩取出。使用计时器记录取出每个金属桩所需的振动时间。
使用1台超声设备取出金属桩的平均时间为131.10±29.68秒（平均值±平均标准误差），使用2台设备时为24.86±6.88秒。使用2台超声设备取出金属桩所需的时间明显少于使用1台超声设备时（<0.001）。
事实证明，使用2台超声设备的技术比仅使用1台超声设备的技术更有效。
