Işman Eren, Okşayan Rıdvan, Sökücü Oral, Üşümez Serdar
Department of Orthodontics, Faculty of Dentistry, Gaziantep University, 27310 Gaziantep, Turkey.
Department of Orthodontics, Faculty of Dentistry, Bezmialem Vakif University, 34093 İstanbul, Turkey.
ScientificWorldJournal. 2014 Jan 14;2014:589461. doi: 10.1155/2014/589461. eCollection 2014.
The use of lasers has been suggested for orthodontists to fabricate or repair orthodontic appliances by welding metals directly in the mouth. This work aimed to evaluate the temperature changes in the pulp chamber during welding of an orthodontic wire to an orthodontic molar band using Nd : YAG laser in vitro. A freshly extracted human third molar with eliminated pulpal tissues was used. J-type thermocouple wire was positioned in the pulp chamber. A conductor gel was used in the transferring of outside temperature changes to the thermocouple wire. An orthodontic band was applied to the molar tooth and bonded using light cured orthodontic cement. Twenty five mm length of 0.6 mm diameter orthodontic stainless steel wires was welded to the orthodontic band using Nd : YAG laser operated at 9.4 watt. Temperature variation was determined as the change from baseline temperature to the highest temperature was recorded during welding. The recorded temperature changes were between 1.8 and 6.8°C (mean: 3.3±1.1°C). The reported critical 5.5°C level was exceeded in only one sample. The results of this study suggest that intraoral use of lasers holds great potential for the future of orthodontics and does not present a thermal risk. Further studies with larger samples and structural analysis are required.
有人建议正畸医生使用激光，通过在口腔内直接焊接金属来制造或修复正畸矫治器。这项工作旨在评估在体外使用Nd:YAG激光将正畸钢丝焊接到正畸磨牙带环的过程中，牙髓腔内的温度变化。使用了一颗刚拔除的、牙髓组织已去除的人类第三磨牙。将J型热电偶丝放置在牙髓腔内。使用传导凝胶将外部温度变化传递给热电偶丝。在磨牙上应用正畸带环，并使用光固化正畸粘固剂进行粘结。使用功率为9.4瓦的Nd:YAG激光将25毫米长、直径0.6毫米的正畸不锈钢丝焊接到正畸带环上。温度变化定义为焊接过程中记录的从基线温度到最高温度的变化。记录的温度变化在1.8至6.8°C之间（平均：3.3±1.1°C）。仅在一个样本中超过了报告的临界5.5°C水平。这项研究的结果表明，激光在口腔内的应用在正畸学的未来具有巨大潜力，并且不存在热风险。需要进行更大样本量和结构分析的进一步研究。
