Patient Satisfaction of Glazed IPS Empress CAD Versus Glazed Celtra Duo Ceramic Laminate Veneers

Patient Satisfaction and One Year Clinical Evaluation of Glazed IPS Empress CAD Versus Glazed Celtra Duo Ceramic Laminate Veneers

The most frequent reason for failure of laminate veneers made of glass ceramics (feldspathic, leucite based and lithium silicate based ceramics) was fracture of the ceramic, Therefore, ceramic materials that have higher fracture resistance, especially for patients suffering from abnormal occlusion, are needed.

IPS Empress CAD is a leucite glass-ceramic of the SiO2-Al2-O3-K2O material systems with leucite crystal ranging from 5 to 10 µm in size. The leucite crystals increase the material strength and interferes with crack propagation, while the fracture energy is absorbed by the crystalline phase. The resistance and flexural strength (160 Mpa) is improved by the difference in the coefficient of thermal expansion between the glass phase and the crystalline phase and the cooling process following sintering phase. CELTRA DUO: is a new generation of glass ceramic material. With the aid of a new manufacturing process, the glass ceramic is infiltrated with 10% zirconia by weight, producing zirconia reinforced lithium silicate ceramic (ZLS). The material is characterized by a unique homogenous structure with fine grains that provides excellent material quality and consistency, high strength properties and long term performance. In addition, the material offers satisfying processing characteristics which can be milled and polished easily. After milling the restorations are shaded correctly shaded, with no need for crystallization step 10. The milled restorations have a flexural strength of 210 MPa. After stain and glaze firing the restoration will exhibit a flexural strength up to 370 MPa.

zirconia reinforced lithium silicate glass ceramic is infiltrated with 10% zirconia by weight, producing zirconia reinforced lithium silicate ceramic

glazed Leucite based glass ceramics ,Its a glass ceramic which is etchable and proved to have good esthetics if used for laminate veneers

Inclusion Criteria: All subjects are required to be From 18-50 years old, be able to read and sign the informed consent document. Physically and psychologically able to tolerate conventional restorative procedures have no active periodontal or pulpal diseases, have teeth with good restorations Patients with teeth problems indicated for laminate veneer: Discoloration Fracture not involving more than 50% enamel loss Mild malposition Diastema Enamel fluorosis Stained or defective restorations Willing to return for follow-up examinations and evaluation Exclusion Criteria: 1. Patients in the growth stage with partially erupted teeth 2. Patient with fractured teeth of more than 50% enamel loss 3. Patients with poor oral hygiene and motivation 4. Pregnant women's 5. Patient with post and core endodontically treated teeth 6. Psychiatric problems or unrealistic expectations 7. Lack of opposite occluding dentition in the area intended for restoration 8. Patients involved in contact sports 9. Teeth with deep discoloration