Abstract
The fitting of cast post-and-core restorations is critical to ensure good adaptation and passivity of fit. 1 Morgano S.M. Brackett S.E. Foundation restorations in fixed prosthodontics: current knowledge and future needs. J Prosthet Dent. 1999; 82: 643-657 Abstract Full Text Full Text PDF PubMed Scopus (144) Google Scholar , 2 Goerig A.C. Mueninghoff L.A. Management of the endodontically treated tooth. Part II: technique. J Prosthet Dent. 1983; 49: 491-497 Abstract Full Text PDF PubMed Scopus (30) Google Scholar , 3 Sorensen J.A. Engelman M.J. Effect of post adaptation on fracture resistance of endodontically treated teeth. J Prosthet Dent. 1990; 64: 419-424 Abstract Full Text PDF PubMed Scopus (135) Google Scholar If a passive fit is not achieved, wedging stresses may result in root fracture. 4 Morgano S.M. Milot P. Clinical success of cast metal posts and cores. J Prosthet Dent. 1993; 70: 11-16 Abstract Full Text PDF PubMed Scopus (115) Google Scholar However, in some situations, cast posts and cores do not fit precisely and, consequently, require adjustment, which may result in looseness of fit. 5 Holmes D.C. Diaz-Arnold A.M. Leary J.M. Influence of post dimension on stress distribution in dentin. J Prosthet Dent. 1996; 75: 140-147 Abstract Full Text PDF PubMed Scopus (184) Google Scholar , 6 Tjan A.H. Whang S.B. Resistance to root fracture of dowel channels with various thicknesses of buccal dentin walls. J Prosthet Dent. 1985; 53: 496-500 Abstract Full Text PDF PubMed Scopus (139) Google Scholar Indicating materials can be used to evaluate the fit of cast posts and cores. However, adjustment using carbide burs is not always exclusive to the binding areas and may result in overadjustment, thus influencing retention. 2 Goerig A.C. Mueninghoff L.A. Management of the endodontically treated tooth. Part II: technique. J Prosthet Dent. 1983; 49: 491-497 Abstract Full Text PDF PubMed Scopus (30) Google Scholar , 4 Morgano S.M. Milot P. Clinical success of cast metal posts and cores. J Prosthet Dent. 1993; 70: 11-16 Abstract Full Text PDF PubMed Scopus (115) Google Scholar
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