Comparative Study Of Fracture Resistance Between Monolithic Zirconia Crowns And Veneered Zirconia Crowns

This study aims to evaluate fracture resistance of monolithic zirconia crowns designed using CAD/CAM technique and veneered zirconia crowns. Twenty metal orthodontic abutments were designed and fabricated using a metal laser printer. Specimens were then divided into two groups (n=10). All specimens were bonded and attached using glass ionomer cement. Samples were tested for fracture resistance using a general material testing machine (Testometric). Data were statistically analyzed using Student's t-test. Significant statistic differences were found between the study groups as monolithic zirconia crowns displayed higher fracture resistance in comparison with veneered zirconia crowns, since monolithic zirconia crowns happened to solve the issue of chipping faced with veneers.