Fernandes L M, Ogaard B, Skoglund L
Department of Orthodontics, Faculty of Dentistry, University of Oslo, Norway.
J Orofac Orthop. 1998;59(6):331-9. doi: 10.1007/BF01299769.
Two nickel-titanium arch-wire types commonly used for initial tooth alignment were compared with regard to the pain/discomfort patients experience during the initial phase of tooth movement. The two arch wires used were a superelastic nickel-titanium alloy, 0.014 inch Sentalloy, Light (GAC International Inc. Central Islip, NY, USA) and a 0.014 inch Nitinol (Unitek, Monrovia, CA, USA), a conventional nickel-titanium aligning archwire. One hundred and twenty-eight consecutive patients attending an orthodontic university clinic and 2 private practices for routine placement of a fixed appliance were randomly assigned one of these 2 initial arch wires. Assessments of pain/discomfort were made daily by means of a 100 mm visual analog scale (VAS) over the first 7-day period after bonding. On the first day, recordings were made every hour for the first 11 hours. The results showed that the level of discomfort increased continuously every hour after the insertion of either a Sentalloy or a Nitinol as first arch wires, with a peak in the first night, remaining high on the second day and decreasing thereafter to baseline level after 7 days. During the first 10 hours it was apparent that the pain/discomfort experienced after placement of a Sentalloy was less than that found with the Nitinol archwire, although a significant difference could be found at 4 hours only. No significant gender-specific differences were found in either archwire group. A significant difference between the upper and lower dental arches was observed during the first 11 hours after placement of either a Sentalloy or a Nitinol arch wire, with the lower arch having the higher pain experience.
就患者在牙齿移动初始阶段所经历的疼痛/不适，对常用于初始牙齿排齐的两种镍钛弓丝进行了比较。所使用的两种弓丝分别是超弹性镍钛合金0.014英寸Sentalloy Light（美国纽约州中央伊斯利普市GAC国际公司）和0.014英寸镍钛合金（美国加利福尼亚州蒙罗维亚市Unitek公司），一种传统的镍钛排齐弓丝。连续128名到一所正畸大学诊所和两家私人诊所进行常规固定矫治器安置的患者被随机分配使用这两种初始弓丝中的一种。在粘接后的头7天内，每天通过100毫米视觉模拟量表（VAS）对疼痛/不适进行评估。第一天，在最初的11个小时内每小时记录一次。结果显示，在插入Sentalloy或镍钛合金作为第一根弓丝后，不适程度每小时持续增加，在第一个晚上达到峰值，第二天仍保持较高水平，之后在7天后降至基线水平。在最初的10个小时内，很明显放置Sentalloy后所经历的疼痛/不适比镍钛弓丝要少，不过仅在4小时时能发现显著差异。在任何一种弓丝组中均未发现明显的性别差异。在放置Sentalloy或镍钛合金弓丝后的头11个小时内，观察到上下牙弓之间存在显著差异，下牙弓的疼痛感受更强。
