title: Fracture resistance of metal- and galvano-ceramic crowns cemented with different luting cements: in vitro comparative study.
abstract: This study aimed to compare the fracture resistance of galvano-ceramic crowns with metal-ceramic crowns cemented to natural premolar teeth with different luting cements. Sixty intact maxillary premolars were prepared to receive full-coverage crown restorations and were divided into 2 equal groups (n = 30): galvano-ceramic crowns and metal-ceramic crowns. Each group was further subdivided into 3 equal subgroups (n = 10) according to the luting cement used: zinc-phosphate, glass-ionomer, or adhesive-resin cement. The specimens were then compressively loaded until failure in a universal testing machine. The metal-ceramic crowns exhibited higher resistance to fracture compared to galvano-ceramic crowns, but both exceeded the normal documented values of occlusal masticatory forces.
authors.affiliation: Conservative Dentistry Department, Faculty of Dentistry, Mansoura University, Egypt.
authors.forename: Mohamed H
authors.initials: MH
authors.lastname: Ghazy
authors.forename: Manal M Abo
authors.initials: MM
authors.lastname: Madina
mesh_terms: D001641:Bicuspid; D001732:Bite Force; D003442:Crowns; D003738:Dental Cements / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis / Q000295:instrumentation; D004563:Electrochemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry*; D019279:Resin Cements / Q000737:chemistry; D013314:Stress, Mechanical; D019231:Tooth Preparation, Prosthodontic; D015036:Zinc Phosphate Cement / Q000737:chemistry
chemical_list: D003738:Dental Cements; D005899:Glass Ionomer Cements; D016876:Metal Ceramic Alloys; D019279:Resin Cements; D003776:Dental Porcelain; D015036:Zinc Phosphate Cement