Private Practice, Mersin, Turkey.
Department of Orthodontics, Faculty of Dentistry, Gaziantep University, Gaziantep, Turkey.
Am J Orthod Dentofacial Orthop. 2020 Jul;158(1):50-58. doi: 10.1016/j.ajodo.2019.07.014. Epub 2020 May 12.
This study was conducted to investigate the efficacy of botulinum toxin applied to the different muscles of patients who have excessive gingival display and to evaluate the return to baseline gingival exposure value.
Twenty-eight patients who had a gummy smile of more than 2 mm were randomly divided into 2 groups. Botulinum toxin was administered equally to the left and right of the levator labii superioris alaeque nasi muscle of group 1 and the orbicularis oris site of group 2. Photographs were taken, and measurements were taken before injection and at 3 days, 15 days, 1 month, 4 months, 5 months, and 6 months after injection. The visual analogue scale was used to assess the level of satisfaction.
The average amount of visible gingiva in group 1 was 4.92 mm at the beginning of the treatment and 1.92 mm on the 15th day. In group 2, the average amount of visible gingiva was 4.58 mm at the beginning of treatment and 2.16 mm on the 15th day. In both treatment groups, it was determined that the measurements on the sixth month did not return to their initial values. The decrease in gingival appearances in group 1 was greater than in group 2. There was no significant difference between the groups in terms of return to baseline gingival exposure value. In both groups, it was seen that the increase in satisfaction in patients was high.
For gummy smile correction, botulinum toxin injection is thought to be an alternative method because it is effective and conservative and has high patient satisfaction.
本研究旨在探究在存在过度牙龈显露的患者的不同肌肉中应用肉毒毒素的疗效，并评估牙龈显露值恢复至基线的情况。
将 28 名牙龈显露超过 2mm 的露龈笑患者随机分为两组。第 1 组等量注射至提上唇鼻翼肌的左侧和右侧，第 2 组等量注射至口轮匝肌。在注射前、注射后 3 天、15 天、1 个月、4 个月、5 个月和 6 个月拍摄照片并进行测量。采用视觉模拟评分评估满意度。
治疗开始时，第 1 组的平均可见牙龈量为 4.92mm，第 15 天为 1.92mm。第 2 组治疗开始时的平均可见牙龈量为 4.58mm，第 15 天为 2.16mm。在两组治疗中，第 6 个月的测量值均未恢复至初始值。第 1 组的牙龈外观减少量大于第 2 组。两组间牙龈显露值恢复至基线的情况无显著差异。两组患者的满意度均增高。
对于露龈笑的矫正，肉毒毒素注射被认为是一种有效的替代方法，因为它具有有效性和保守性，并且患者满意度高。
