The goal of endodontics and restorative dentistry is to retain the natural teeth with maximal function and pleasing aesthetics. Endodontically treated tooth with little or no clinical crown can be restored with different post and core materials for additional retention and support but appropriated material and method depend on type, function and remaining tooth structure as well as tooth prognosis and economic status of patient. Three case reports are discussed here where structurally compromised, endodontically treated anterior & posterior teeth were restored with fibre post and core, cast post and core and biological/dentin post.