Khaled Ibrahim Khaled Zaghloul And Cherif Adel Mohsen,

ABSTRACT
Statement Of Problem : Little Information Is Available On The Translucency Of Zirconia Reinforced Glass Ceramic Restorations With A Cad Cam Veneers In Various Internal Relief Space And Different Cement Shades Combinations. Purpose The Aim Of The Study Is To Evaluate Translucency Of Zirconia Reinforced Glass Ceramic CAD/CAM Veneers With Different Internal Relief Spaces And Different Cement Shades. Material And Methods : Twenty Samples Were Constructed And Classified According To The Type Of Materials Into One Main Group , VITA SUPRINITY (10 Samples). The Group Were Subdivided Into Two Subgroups (5 Samples Each) According To The Internal Relief Space (100 Microns And 30 Microns). Each Subgroup Were Further Subdivided Into Six Classes According To The Type Of Trial Cements Used : The Control Class ( Glycerine ), And Five Trial Paste Classes According To Their Shade (Translucent Shade, White Opaque Shade, A1/Light Yellow Shade, A3 Opaque/Yellow Opaque Shade And B0.5/ White Shade (10 Samples Each) According To Shade Of The Trial Cement Used. Comparisons Between Tooth Regions Were Made By Using 1-way ANOVA. When The ANOVA Was Significant, The Tukey Honestly Significant Difference (HSD) Test Was Used To Determine Which Comparisons Were Significantly Different.

Results: The Consistency Of The Translucency Among The Tested Specimens Was Confirmed Using A 1-way ANOVA And The Tukey HSD Post Hoc Test (P<.05). The Luminous Transmittance Exhibited A Statistically Significant Dependence On Zirconia Reinforced Glass Ceramic Restorations With A Cad Cam Veneers In Various Internal Relief Space And Different Cement Shades Combinations. (P<.05). Conclusions : The Underlying Color Of The Tested Trial Insertion Pastes Caused Color Change (?E >3.7) For Different Regions For Suprinity Laminate Veneers With 30 ?m Internal Relief Space.