A定义aesthetic美观alveolar牙槽骨anchorageresistance to unwanted tooth movement caused by the reactive component of an orthodontic force; refers also to the intra- and extraoral structures that supply the resistanceAngles classification of occlusiona definition of malocclusion based on the relationships of the first permanent molarsangulationthe tilt of the long axis of a tooth in a mesial or distal direction; see inclinationAnkylosed Primary Teeth乳牙粘连anterior crossbiteone
