Shahamfar Mohamadreza, Atashi Mohamad Hossein A, Azima Niloofar
Department of Orthodontics, Islamic Azad University, Tabriz Branch, Tabriz, Iran.
Department of Orthodontics, Tabriz University of Medical Sciences, School of Dentistry, Tabriz, Iran.
Int J Clin Pediatr Dent. 2020 May-Jun;13(3):255-260. doi: 10.5005/jp-journals-10005-1759.
Achieving a satisfactory facial esthetics is of utmost importance in the practice of orthodontics. Cl II div 1 patients often suffer from numerous adverse facial characteristics which may impair their social well-being. The objective of the current study was to evaluate the esthetic changes in such patients by using a modified twin block appliance.
Seventy adolescent patients with mandibular deficiency consecutively underwent treatment with a modified twin block appliance for a mean period of 13 months. Soft tissue analyzes of Burstone and Mcnamara were applied to evaluate the changes before and after the treatment. The esthetic changes before and after the therapy were compared using parametric paired tests analysis. values less than 0.05 were considered significant.
Facial convexity, lip incompetence, upper lip protrusion, and columellar inclination significantly decreased ( < 0.05) while Merrifield's -angle nasolabial angle, lower lip length, and mentolabial angle significantly increased ( < 0.05). Vertical facial height ratio, lower lip protrusion, upper lip length as well as nasal projection and inclination, did not change significantly ( > 0.05).
Our findings indicated that a modified form of the twin block appliance can be substantially effective in the improvement of several aspects of patients' facial balance with minimum untoward effects.
Adolescents suffering from mandibular deficiency can gain substantial facial balance with the twin block appliance. The whole face attractiveness, however, is another subject and should not be conflicted with the facial balance.
Shahamfar M, Atashi MHA, Azima N. Soft Tissue Esthetic Changes Following a Modified Twin Block Appliance Therapy: A Prospective Study. Int J Clin Pediatr Dent 2020;13(3):255-260.
在正畸治疗实践中，实现令人满意的面部美学至关重要。安氏II类1分类患者常伴有多种不良面部特征，这可能损害他们的社会幸福感。本研究的目的是通过使用改良型双阻板矫治器评估此类患者的美学变化。
70例下颌后缩的青少年患者连续接受改良型双阻板矫治器治疗，平均治疗时间为13个月。应用Burstone和Mcnamara软组织分析法评估治疗前后的变化。使用参数配对检验分析比较治疗前后的美学变化。P值小于0.05被认为具有统计学意义。
面部凸度、唇闭合不全、上唇前突和鼻小柱倾斜度显著降低（P<0.05），而Merrifield氏鼻唇角、下唇长度和颏唇沟角显著增加（P<0.05）。垂直面部高度比、下唇前突、上唇长度以及鼻突度和倾斜度无显著变化（P>0.05）。
我们的研究结果表明，改良型双阻板矫治器在改善患者面部平衡的多个方面具有显著效果，且副作用最小。
下颌后缩的青少年使用双阻板矫治器可获得显著的面部平衡。然而，整个面部的吸引力是另一个问题，不应与面部平衡相冲突。
Shahamfar M, Atashi MHA, Azima N.改良型双阻板矫治器治疗后的软组织美学变化：一项前瞻性研究。《国际临床儿科牙科学杂志》2020；13(3):255 - 260。
