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近来拔除第二磨牙这个议题已引起正畸界的热烈争论:有人认为拔除第二磨牙的好处无可争辩,它可避免凹形脸、稳定咬合及防止颞颌关节损伤。但有人却认为这种做法是轻率的,对颌骨发育有害。对此作者进行了5年以上的随访研究. 材料与方法拔牙组30人(男13、女17),年龄11岁～17岁(平均13.9岁),I类或轻度II类错(牙合),下牙列整齐或轻度拥挤,全景X线片显示全牙列完整,第三磨牙萌出间隙不足.对照组(未拔牙)30人(男12、女18),I类或轻度II类错(牙合),下牙列整齐或轻度拥挤,
The recent removal of the second molars issue has caused heated debate in the orthodontics sector: it has been argued that the benefits of removing the second molars are indisputable. It avoids concave faces, stabilizes occlusion and prevents temporomandibular joint damage. But some people think that this approach is frivolous, harmful to the development of the jaw. The authors conducted a follow-up study of more than 5 years.Materials and Methods Tooth extraction group of 30 (male 13, female 17), aged 11 to 17 years (mean 13.9 years), class I or mild class II malocclusion ), The dentition neatly or slightly crowded, the panoramic X-ray film shows the complete dentition, the third molar eruption gap is insufficient.Control group (untrained) 30 (male 12, female 18), class I or mild II Class wrong (occlusion), the dentition neat or slightly crowded,