达成精确的转矩表达和稳定的支抗控制是正畸治疗的关键因素，患者在治疗过程中对口腔健康与矫治感受的重视程度日益增长，球面自锁托槽（球托）在一定程度上满足了这两个方面的需求。球面自锁托槽的球面结构可以降低因佩戴矫治器而引起口腔溃疡的概率，并能减少生物膜附着，降低牙龈和牙周疾病的发生概率。与方形托槽相比，球面自锁托槽的脱落率降低了95%。止动定位系统是球面自锁托槽的核心创新点，主要由螺纹系统、螺丝系统和弓丝系统组成。得益于止动定位系统，球面自锁托槽可以去除余隙角，精准表达转矩，使用止锁螺丝时可增强支抗稳定性。止动定位系统搭配了3种特制的细方丝（0.152 4 mm×0.635 0 mm、0.203 2 mm×0.584 2 mm、0.254 0 mm×0.558 8 mm），用轻力排齐的同时可以表达转矩，控制牙根。球托矫治器以黏膜刺激小、脱落率低、转矩表达精准、支抗保有率高、细方丝轻力矫治等特点引起了广泛关注。

Precise torque expression and stable anchorage control are key points in orthodontic treatment. The concern of patients’ quality of life and oral health during orthodontic treatment is increasing. However, most orthodontic instruments cannot achieve the goals mentioned above. A spherical bracket exhibits advantages in these aspects and mitigates these problems to a certain extent. The spherical surface decreases the ulcer rate. Biofilm formation is inhibited, thereby reducing the probability of gum and periodontal disease occurrence. The bonding failure rate of the spherical bracket is lower than that of other self-ligating brackets by 95%. The lock-hook system is the most innovative aspect of the spherical bracket. The system contains thread, screw, and arch wire systems. The lock-hook system benefits torque expression because of its mitigating function. Furthermore, it improves the stability of anchorage when the lock screw is applied. The arch wire system containing three unique wires (0.152 4 mm×0.635 0 mm, 0.203 2 mm×0.584 2 mm, 0.254 0 mm×0.558 8 mm) can be used by orthodontist to control torque with light force during alignment. Therefore, the spherical bracket has gained increasing interest because of its outstanding performance such as comfort, low bonding failure rate, accurate torque expression, stable anchorage, and light force.