Jearanai Tanapat, Samruajbenjakun Bancha, Chanmanee Pannapat
Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Diagnostics (Basel). 2024 Mar 11;14(6):590. doi: 10.3390/diagnostics14060590.
Significant facial asymmetry can lead to both functional and aesthetic issues. Often, such asymmetry originates from irregularities in the jaw structure. It is critical to recognize that asymmetries can be concealed by soft tissue, which may be overlooked. The aim of this study is to investigate the relationships between bilateral landmarks in the vertical dimension of facial asymmetry among individuals with skeletal Class II and Class III malocclusions. Fifty-two adult patients with a mean age of 24.4 ± 3.79 years with facial asymmetry who underwent orthodontic and orthognathic surgery were studied. Cone-beam computed tomography and facial scans were used to create 3D virtual head models which enhanced the accuracy in addressing facial asymmetry to ensure effective treatment planning. Each landmark was measured and digitized using the Dolphin Imaging program. The findings showed a correlation between gender and type of skeletal discrepancies with the menton deviation direction. In conclusion, the vertical discrepancy between bilateral landmarks was observable in both hard and soft tissues with more pronounced expression in soft tissues. This discrepancy was characterized by an elevation on the same side as the menton deviation, which was a feature observed in both skeletal Class II and Class III individuals.
明显的面部不对称会导致功能和美学问题。通常，这种不对称源于颌骨结构的不规则。必须认识到，软组织可能会掩盖不对称，这一点可能会被忽视。本研究的目的是调查骨骼II类和III类错牙合畸形患者面部不对称垂直维度上双侧标志点之间的关系。对52例平均年龄为24.4±3.79岁、有面部不对称且接受了正畸和正颌手术的成年患者进行了研究。使用锥形束计算机断层扫描和面部扫描创建3D虚拟头部模型，这提高了处理面部不对称的准确性，以确保有效的治疗计划。使用Dolphin Imaging程序对每个标志点进行测量和数字化处理。研究结果表明，性别和骨骼差异类型与颏点偏移方向之间存在相关性。总之，双侧标志点之间的垂直差异在硬组织和软组织中均有体现，在软组织中的表现更为明显。这种差异的特征是在与颏点偏移同侧出现抬高，这是骨骼II类和III类个体中均观察到的一个特征。
