多年来对于矫治需要拔除恒牙的问题已引起专业性的讨论和争议。拔牙常在矫治牙齿拥挤时首先考虑。也可在颌骨生长不调的病例中如安氏Ⅱ类错及各种其它情况,如牙疾患及外伤等采用。 Over the years, the need to remove permanent teeth correction has caused professional discussions and controversies. Tooth extraction is often the first consideration in the treatment of crowded teeth. Can also be adjusted in the jaw growth disorders such as Class Ⅱ Malocclusion and a variety of other conditions, such as dental disorders and trauma used.