In Vitro Evaluation of Five Core Materials

Abstract

Resin composite core material performed better than glass ionomer material in this in vitro study. The flowable composite core material performed about the same in terms of fracture strength and diametral tensile strength compared with nonflowable composites. Combined with certain core materials, the flange design increased the fracture strength of the tooth/dowel and core combination.

Does the surface treatment affect the bond strength of various fibre-post systems to resin-core materials?

“…Amongst which, resin composites are superior to glass ionomers and amalgam in that they enhance the retention and fracture resistance of the posts. 15 Moreover, resin composite core materials are aesthetically pleasing especially under all-ceramic crowns, performs as well as dental amalgam in strength, better than amalgam in bond strength to dentine, and similar to tooth structure in hardness and fracture toughness. 10 The use of prefabricated posts in combination with resin composites to directly build-up core as an alternative to cast posts and cores is expected to yield a more natural and aesthetic appearance of the final restoration.…”

Investigation of the correlation between the different mechanical properties of resin composites

“…Vickers and Knoop microhardness (HV and HK) tests are simple methods for testing the surface mechanical properties and they have long been used to evaluate the degree of conversion, wear rate of resin composites and other physical properties of dental resin composites. Another hardness test used for resin composites is the Barcol hardness (BH) test by penetrating with a truncated conical needle 13,22,23) . Although a wide variety of fillers and resin matrices have been used in the current resin composites, they generally have a similar filler-matrix coupled composite system.…”

Influence of Polymerization Mode on Degree of Conversion and Micropush-out Bond Strength of Resin Core Systems Using Different Adhesive Systems

“…In the face of a conspicuous horizontal loss of the clinical crown, such that only a ferrule of minimal thickness could be created in the remaining tooth structure, a post-and-core build-up is needed 2) . The most commonly used core materials are glass ionomers, resin composites, amalgam, and cast metal alloys 3) . Amongst which, resin composites are superior to glass ionomers and amalgam in that they enhance the retention and fracture resistance of posts.…”