Research for orthodontic risk factors concerned with treatment results in young and adult patient

1997年研究：本文对1,005例正畸治疗病例进行研究，包括骨骼、牙齿、治疗方法和患者年龄分类。1998年的研究：选择下颌骨生长势、生长方向和下颌平面角作为正畸治疗的危险因素; 1999年的研究：总结了青少年和成人正畸治疗的危险因素。结果表明，影响下颌顺时针生长方向的主要因素是治疗开始年龄。拔牙法发现成人骨性II类患者存在多种危险因素。本研究结果可作为一种安全的正畸治疗指南。报告中提出了更详细的建议。

Research in 1997: We researched 1,005 orthodontic treated cases, which were consisted of skeletal, dental, treatment methods and patients age classifications. Materials were skeletal Class I(346 cases), Class II(361 cases) and Class III(298 cases).Research in 1998: The mandibular growth potential, growth direction and mandibular plane angle, were selected as risk factors in orthodontic treatments.Research in 1999: We summarized risk factors in orthodontic treatment for young and adult patients. As a results of that, main factors were mandibular clockwise growth direction and starting age of treatment. Many risk factors were found in Skeletal Class II adult patients with extraction method. These findings suggested that would be able to use as a safety orthodontic treatment guideline. More detailed suggestions were shown in reports.