3Rosenstiel Land Fujimono.Contemporary Fixed Frosthodontics (Third Edition),2001,272-309.
4Sjogren U.Factors affecting the long-term results of endodontic treatment.J-Endod,1990,16:498-504.
5Gegauff AG.Change in strength from creating a ferrule via crown-leagthening.J Dent Res,1999,78:223-227.
6Mian K.A Respective Analysis of factors Associated with the Periapical Status of Restored.Endodontically Treated Teeth Inter J,2003,16:31-38.
7Colley.Retention of endodontic dowels effects of cement,dowel length,dimeter and design.J P D,1978,39:401-405.
8Shilingbur HT.Restoration of endodontically treated posterior teeth.Quintessence a publishing Co,Int,1982
9Chan RW,Bryant RW.Post-core Foundations for endodontical treated posterior teeth.J P D,1982,48:401-404.
10Abou-Rass M,et al.Preparation of space for posting:effect on thickness of canal walls and incidence of perforation in molars.J Am Dent Assoc,1982,104:834.