Mechanical Behaviour of Ceramic Layered Zirconia Restorations: A Three Dimensional Finite Element Analysis using Microcomputed Tomography Data
Journal Title: Journal of Clinical and Diagnostic Research - Year 2018, Vol 12, Issue 7
Abstract
Introduction: Combining the strength of zirconia cores with superior aesthetics of a weaker veneer ceramic can result in a reliable and more biocompatible restoration. Aim: To investigate the mechanical behaviour with respect to different designs of zirconia-ceramic veneer interface using three-dimensional finite element analysis. Materials and Methods: Tooth preparation of the indicated mandibular molar was done for three patients. Each patient was restored with a different design of zirconia-ceramic interface (Design I- full ceramic veneer, Design II- ceramic veneer on buccal surface extending upto occlusal surface, Design III- ceramic veneer on buccal surface only). Cone Beam Computed Tomography (CBCT) image was taken for each patient after the cementation of the restoration which was used to develop 3D finite element models by applying appropriate softwares (Mimics, Rapidform, Hypermesh, ANSYS). Four types of loads were applied to each of the 3D finite element model-600 N load was applied vertically, 225 N load was applied in three directions (vertically, oblique at 45° and horizontally) at different points on occlusal surface and their buccal inclines. Maximum principal stress and minimum principal stress were obtained by finite element analysis. Results: When vertical loads of 600 N and 225 N were applied, ceramic layer of design II experienced larger tensile stresses 21.83 MPa and 28.33 MPa. When horizontal load of 225 N was applied, tensile stress in ceramic layer was largest in design I i.e., 29.87 MPa. When an oblique load of 225 N was applied, largest tensile stress in ceramic layer of 12.82 MPa was observed in design I. Conclusion: The different design characteristics of the junction between ceramic and zirconia will affect the bond between zirconia core and ceramic veneer. Design III has the least chances of chipping of ceramic layer under masticatory loads. Design II is more prone to chipping of ceramic layer under masticatory loads. Design I may show chipping under high occlusal loads.
Authors and Affiliations
Shruti Singh, Ponnanna Appanna, Kashinatha Holenarasipur Manjunath, Nitesh Rai, Ranganatha Rao K Jingade, Harish Kumar Muniswamy
Keywords
Related Articles
- EP ID EP526102
- DOI 10.7860/JCDR/2018/31339.11792
- Views 78
- Downloads 0
Acute Renal Failure in Dengue Infection
Introduction: Acute Renal Failure (RF) is a rare but well recognized complication of Dengue Infection (DI). There has been paucity of published data regarding renal involvement in DI. Aim: The aim of the present study wa...
Papillary Renal Cell Carcinoma Presenting as a Perinephric Abscess
ABSTRACT Typically, Renal Cell Carcinoma (RCC) presents with distinguishing features of flank pain, abdominal palpable mass and haematuria. Other clinical symptoms include weight loss, anorexia and metastasis to the lung...
Nurse Manager's Emotional Intelligence in Educational Hospitals: A Cross-sectional Study from the West of Iran
Abstract Introduction: Identifying and promoting nurse managers' emotional intelligence is critical in order to promote the quality of health care and educational services. Effective managers deploy emotional intelligen...
Left-Sided Vanishing Lung Tumour: A Rare Case
In some cases of congestive heart failure, interlobar transudative pleural effusions may occur and appear like a tumour in the chest radiograph and disappear with diuretic therapy. They are called as Vanishing or Phantom...
Revisiting the Utility of Histopathological Examination of Biopsy: A Necessity in Microbiology
Introduction: Culture is the gold standard, while potassium hydroxide mount is simplest technique used for diagnosis of fungal pathogens. Histopathological examination is the only definitive means to identify certain unc...