title: Comparative study of the physical properties of core materials.
abstract: This study was undertaken to measure physical properties of materials used for direct core buildups, including high-copper amalgam, visible light-cured resin composite, autocured titanium-containing composite, polyacid-modified composite, resin-modified glass-ionomer, and silver cermet cement. Compressive strength, diametral tensile strength, and flexural strength of six core materials of various material classes were measured for each material as a function of time up to 3 months at different storage conditions, using a standard specification test designed for the materials. Three different storage conditions (dry, humid, wet) at 37 degrees C were chosen. Materials were manipulated according to manufacturers' instructions for use as cores. Mean compressive, diametral tensile, and flexural strengths with associated standard deviations were calculated for each material. Multiple comparison and Newman-Keuls tests discerned many differences among materials. All materials were found to meet the minimum specification requirements, except in terms of flexural strength for amalgam after 1 hour and the silver cermet at all time intervals.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Türkiye.
authors.forename: Gülbin
authors.initials: G
authors.lastname: Saygili
authors.forename: Sevil M
authors.initials: SM
authors.lastname: Mahmali
mesh_terms: D016722:Cermet Cements / Q000737:chemistry; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D019245:Compressive Strength; D003300:Copper / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry; D003723:Dental Amalgam / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D018583:Pliability; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry; D017640:Silicates / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D018030:Silver Compounds / Q000737:chemistry; D013223:Statistics as Topic; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors; D014025:Titanium / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D016722:Cermet Cements; D020770:Compomers; D003188:Composite Resins; D003722:Dental Alloys; D003764:Dental Materials; C088486:Dyract; D005899:Glass Ionomer Cements; D008689:Methacrylates; D019279:Resin Cements; D017640:Silicates; D018030:Silver Compounds; C420128:Spectrum composite resin; C113300:TPH hybrid; C084550:Vitremer; D014867:Water; C072650:Duralloy; C067445:Chelon Silver; C079578:Ti-Core composite resin; D012834:Silver; D003300:Copper; D003723:Dental Amalgam; D014025:Titanium