During patient treatment, the clinician needs to consider many factors that will affect the ultimate outcome. In simple terms, these factors can be grouped into 3 categories:
(I) operator needs,
(II) restoration needs,
(III) the tooth needs.
(I)The operator needs are the conditions the clinician needs to treat the tooth.
(II) The restoration needs are the prep dimensions and tooth conditions for optimal strength and longevity.
(III)The tooth needs are the biologic and structural limitations for a treated tooth to remain predictably functional.
The Cala Lilly is a flower and is the new model for composite preparations.
Modern Molar Endodontic Access and Directed Dentin Conservation, David Clark et al,2010