Open AccessResistance to fracture of endodontically treated premolars restored with glass ionomer cement or acid etch composite resin: An in vitro study
Author(s) -
Banthu Ranga,
DG Chole,
Shashank Kundoor
Publication year - 2010
Publication title -
journal of international clinical dental research organization
Language(s) - English
Resource type - Journals
eISSN - 2231-5357
pISSN - 2231-0754
DOI - 10.4103/2231-0754.95281
Subject(s) - glass ionomer cement , materials science , fracture (geology) , dentistry , tooth fracture , posterior teeth , cement , inlay , composite number , composite material , orthodontics , medicine
Aim: Due to the weakness of endodontically treated posterior teeth requires more strengthened restoration to withstand occlusal forces. The purpose of the present study was to determine and compare the resistance to fracture of endodontically treated maxillary 1 st premolars restored with different materials in mesio-occluso-distal (MOD) cavity preparations. Materials and Methods: MOD cavity preparations in 80 endodontically treated maxillary 1 st premolars were restored using four different methods. Fiber rings were filled with stone plaster and the teeth were placed into the plaster up to the level of cemento-enamel junction. The teeth were grouped according to restorative method, mounted in an Instrom T.T. machine, and the buccal walls subjected to a slowly increasing compressive force until fracture occurred. Result: The force of fracture of the walls of each tooth was recorded and the results in the various groups compared. All teeth fractured in a similar manner irrespective of the restorative method used. Conclusion: The resistance to the fracture of the teeth was the same when they were stored with glass ionomer cement as a base over which composite resin was placed. When the entire cavities were filled with glass ionomer cement, the resistance to fracture of the teeth decreased significantly compared with the acid etch resin technique