A Comparative Evaluation of the Effect of Different Incisal Preparations on the Fracture Resistance and Fracture Pattern of Mandibular Anterior Porcelain Laminate Veneers Using Two Different Materials-An In Vitro Study Vaidya Nupur1, Rodrigues Shobha2,*, Hegde Puneeth3, Shetty Thilak4, Pai Umesh3, Mahesh M3, Saldanha Sharon5 1Post-graduate Student, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education 2Professor and Head, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education 3Associate Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education 4Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education 5Assistant Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education *Corresponding Author: Dr. Shobha Rodrigues, Department No. 7, Manipal College of Dental Sciences, Lighthouse Hill road, Mangalore, 575001 Email ID- shobha.j@manipal.edu, Contact No- +91-9448100464
Online published on 27 November, 2019. Abstract Purpose To evaluate the effect of different incisal preparations on the fracture resistance of mandibular anterior veneers with the use of two routinely indicated ceramics. Method 35 typodont teeth were randomly allocated to 3 groups according to the design (Group I Leucite reinforced glass ceramic, Group II Lithium disilicate glass ceramic and Group III Control). Veneers were fabricated and cemented using Rely X cement, and were tested under oblique loading to evaluate their fracture resistance and pattern. ANOVA and Post hoc Tukeys test were used to evaluate fracture strength and and Chi square test to evaluate fracture patterns (p<0.01) Results 1 mm butt joint lithium disilicate group showed significantly higher compressive strength. Conclusion Both leucite and lithium disilicate may be used to restore mandibular anteriors with the butt joint being the most favourable design Top Keywords Veneers, leucite, lithium disilicate. Top |