Aaesthetic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 resistanceAngle's 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 or more teeth in the maxillary anterior segment is lingual to one or more of the opposing teeth in the mandibular anterior segment in maximum intercuspationanterior segmentall of the canine and incisor teeth in a given dental archarch circumference or arch perimeterthe distance from the mesial contact of one first permanent molar to its antimere as measured through the contact points or buccal cusp tips of all of the intervening teeth, ignoring those teeth that are malpositioned or blocked out so that the measurement represents an ideal arch form; see arch lengtharch depththe perpendicular distance from a point between the central incisors to a line connecting the mesial contacts of the first permanent molars; see arch lengtharch lengthsame as arch depth; but note that 'arch length' is often used as a synonym for arch circumference or arch perimeterarch wirea wire applied to two or more teeth through fixed attachments to cause or guide orthodontic tooth movementattached lingual frenum舌系带过短Bbanda circular metal strip that is adapted to fit closely around a tooth; various components of an orthodontic appliance may be welded or soldered to itbase, bracketthe part of a bracket that is attached either to a metal band or bonding padBegg appl...
