<prompt> Ackerman Proffit classification - outer envelope represent:AlignmentProfileTransverse relationVertical relation  <response>: ACKERMAN-PROFITT SYSTEM OF CLASSIFICATIONCHARACTERISTIC 1 - ALIGNMENTIntra-arch alignment and symmetry are assessed as when seen in the occlusal view. A dental arch is classified as idealcrowdedspaced.CHARACTERISTIC 2 - PROFILEThe profile can be convexstraightconcave. This also includes the assessment of facial divergence, i.e., anterior or posterior divergence.CHARACTERISTIC 3 - TRANSVERSE RELATIONSHIPSThis include the transverse skeletal and dental relationships. Buccal and palatal crossbites are noted. These are further subclassified as unilateral or bilateral. Distinction is made between skeletal and dental crossbites.CHARACTERISTIC 4 - CLASSHere the sagittal relationship of the teeth is assessed using the Angle classification as Class IClass IIClass III. A distinction is made between skeletal and dental malocclusions.CHARACTERISTIC 5-OVERBITEMalocclusions are assessed in the vertical plane. They are described as anterior open biteposterior open biteanterior deep biteposterior collapsed bite. Here, again a distinction is made as to whether the malocclusion is skeletal or dental. 