Maged Saleh Alkhuzae, Lamiaa Sayed Kheiralla And Gihan AbdElhady Elnaggar,

ABSTRACT


Purpose: The Purpose Of This Study Was To Compare Hybrid Ceramic Veneers And Pressable Laminate Veneers Regarding Resistance To Fracture Of Both Materials Following Thermal Cycling.

Materials and Methods: A Total Of Twenty Four Of Comparable Human Central Maxillary Incisors Were Extracted For Periodontal Reason, Were Selected For The Present Study. The Samples Were Divided Into Two Main Groups According To The Material Used For Construction Of Laminate Veneers Restoration. The Vita Enamic Hybrid Ceramic Laminate Veneers Were Fabricated From Vita Enamic Blocks Milled By A Cerec In-Lab CAD/CAM Machine. While The IPS E.max Press Ceramic Laminate Veneers Were Fabricated From Machinable CAD/CAM Wax Discs (CAD Wax) To Have Equal And Standardized Thickness Of All Samples. All Samples Were Subjected To Thermocycling Between 5C� To 55C� In Water Bath For A Total Of 1750 Cycle With 10 Seconds Dwell Time At Each Bath Using Thermocycling Device. The Fracture Load Strength Test Was Performed Using The Universal Testing Machine. Result: It Was Found That IPS Emax Ceramic Press Group Recorded Higher Mean Value Of Fracture Resistance (430.4 � 47.7 N) When Compared Vita Enamic Hybrid Ceramic Group (289.02 � 87.24N) With No Statistically Significant Difference (P>0.05) Between Two Groups As Indicated By Student T-test Conclusion: IPS Emax Ceramic Press Veneer Materials Recorded Higher Mean Value Of Fracture Resistance When Compared Vita Enamic Hybrid Ceramic Veneer Materials With No Statistically Significant Difference