Fundamentals of Cavity Preparation PDF

http://www.free-powerpoint-templates-design.com  Only one tooth surface is involved. Only two tooth surface is involved. Involves three or more surfaces. Enamel wall –Enamel wall is that portion of...

http://www.free-powerpoint-templates-design.com  Only one tooth surface is involved. Only two tooth surface is involved. Involves three or more surfaces. Enamel wall –Enamel wall is that portion of a prepared external wall consisting of enamel. Dentinal wall- The dentinal wall is that portion of a prepared external wall consisting of dentin. AXIAL WALL: An axial wall is an internal wall parallel with the long axis of the tooth. PULPAL WALL: A pulpal wall is an internal wall that is perpendicular to the long axis tooth and occlusal of pulp. Floor / seat: floor is a prepared wall that is reasonably flat and perpendicular to the occlusal forces that are directed occlusogingivally..  CAVITY PREPARATION ANGLES Line angle : It is the junction of two planar surfaces of different orientation along a line. Internal line angle : Is a line angle whose apex points into the tooth e.g. FP. External line angle : Is a line angle whose apex points away from the tooth e.g. ap. Point angles : A point angle is junction of three planal surfaces of different orientation.  Junction of a prepared cavity wall and the external surface of the tooth Def: is the angle of the tooth structure formed by the junction of a prepared cavity wall and the external surface of the tooth  Classification of cavity (G. V. Black) Class III Class IV Class II Class V Class I Class VI  Content Here CLASS I CAVITY 1) Pits & fissures 2) Occlusal surface of premolars & molars 3) Occlusal 2/3 rd of buccal & lingual surface. 4) Lingual surface of maxillary incisors CLASS II CAVITY Restoration on Proximal surface of posterior teeth CLASS III CLASS IV CAVITY CAVITY Restoration on the 1Restoration on the proximal surface of proximal surface of the anterior teeth that anterior teeth that do do not involve incisal involve the incisal edge. edge. CLASS V CAVITY CLASS VI CAVITY Restoration on the Restoration on incisal gingival third of the edge of anterior teeth facial / lingual and occlusal cusp surfaces of all teeth height of posterior teeth