Angle class Ⅱ subdivision malocclusion is one of the most common malocclusions in orthodontics. It also is one of the most complicated and difficult situations in treatment. We can use many ways to improve the molar relationship. To achieve the best results, we should always choose methods based on patients’ age, severity, compliance, and so on. This paper summarizes the etiology, clinical features and treatment planning of Angle class Ⅱ subdivision malocclusion.
