Tooth location to class

Class I Preparations All preparations required to treat pit-and-fissure caries are termed Class I preparations. These include preparations on: I. occlusal surfaces of premolars and molars, II. occlusal two-thirds of the facial and lingual surfaces of molars and III. the lingual surfaces of maxillary incisors. Class II Preparations Preparations required to correct caries lesions that develop in the proximal surfaces of posterior teeth are termed Class II preparations. Class III Preparations Preparations required to correct caries lesions that develop in the proximal surfaces of anterior teeth that do not include the incisal edge are termed Class III preparations. Class IV Preparations Preparations required to correct caries lesions or other defects that develop in the proximal surfaces of anterior teeth that include the incisal edge are termed Class IV preparations. Class V Preparations Preparations required to correct caries lesions or other defects that develop in the gingival third of the facial or lingual surfaces of all teeth are termed Class V preparations. Class VI Preparations Preparations required to correct caries lesions or other defects that develop in the incisal edges of anterior teeth or the occlusal cusp tips of posterior teeth are termed Class VI preparations.