This document provides information about a class I amalgam restoration preparation for tooth #30. It discusses the location and classification of class I cavities, reviews the steps for cavity preparation including outline and internal form, and criteria for a proper class I amalgam preparation such as smooth walls and proper bur alignment. Images show examples of primary groove marking, correct outline form, and caries removal techniques. The document serves to instruct dental students on preparing class I cavities for amalgam fillings.