An In-vitro Comparative Stereomicroscopic Analysis and Evaluation of Marginal Accuracy in Porcelain Fused to Metal Copings Fabricated in Two Different Finish Lines Using Variant Die Materials
Journal Title: Journal of Clinical and Diagnostic Research - Year 2017, Vol 11, Issue 1
Abstract
Introduction: Limited published information is available about the influence of preparatory designs and die materials on marginal accuracy of porcelain fused to metal copings using recently developed die materials. Aim: To detect the influence of margin geometries and dimensional accuracy of contemporary die materials on vertical marginal gaps in Porcelain fused to metal coping using a Stereomicroscope (three dimensional analysis). Materials and Method: Two chrome cobalt alloy models of mandibular first molars prepared to have shoulder and deep chamfer finish lines were CAD-CAM milled. Elastomeric impressions of these models were made in a custom tray, poured in Type IV Gypsum(n=10) and Resin modified Gypsum(n=10) and also packed with Epoxy resin (n=10) as a die material to form a total of 60 samples, 30 in each group (shoulder and deep chamfer). Wax patterns were fabricated, invested and castings in ceramic alloy were obtained in traditional manner. These copings were later analyzed on CAD/CAM models using stereomicroscope. Results: Both the designs did not exhibit significant difference (p<0.05). Whereas, the three die materials exhibited significant difference (p<0.05) by Two way ANOVA test and Tukey’s multiple Post Hoc test. Results from this study showed that vertical marginal gaps for copings fabricated on resin modified gypsum as a die material were within the clinically acceptable range. Conclusion: Margin geometries both shoulder and deep chamfer have equal influence on vertical marginal gaps in metal ceramic restorations. Copings fabricated on Epoxy resin dies exhibited highest value of vertical marginal discrepancy, where as least value was determined for copings constructed on dies fabricated from resin modified gypsum.
Authors and Affiliations
Priya L Vaswani, Pronob K Sanyal, Siddharth Y Gosavi, Abhijeet R Kore
Keywords
Related Articles
- EP ID EP328797
- DOI 10.7860/JCDR/2017/21370.9131
- Views 160
- Downloads 0
Choroidal Metastasis as Initial Presentation in Adenocarcinoma of Lung: A Case Report
Vision impairment as an initial presentation detecting choroid metastasis in primary lung cancer is rare. Prevention or treatment of visual loss and improvement in quality of life can be achieved by treatment of intraocu...
Hypernatremia and Acute Kidney Injury in Exclusive Breast Fed Babies-Time to Reconsider!
ABSTRACT Introduction: Hypernatremia in breast fed babies is not very commonly reported. But incidence seems to be increasing. Exact pathophysiology is not clear but hypothesised to be due to relative lactation failure i...
Pharmacoepidemiology of Snake Bite Cases at a Tertiary Care Teaching Hospital in Odisha
Introduction: Snake bite is a neglected but widely distributed public health problem. It results in significant morbidity and mortality in many active young people which can be reduced with proper awareness, first aid an...
Utilization Pattern of Potentially Inappropriate Medications in Geriatric Patients in a Tertiary Care Hospital: A Retrospective Observational Study
Introduction: Geriatric population is on the rise throughout the world, hence the quality and the safety of prescribing in the elderly is a global healthcare concern. It is important for the healthcare providers to be aw...
Impact of Counselling Services in Stress Reduction among First Year MBBS Students
ABSTRACT Introduction: Medical education being a highly competitive field is known to be quite stressful. Stress hinders the efficiency of many medical students. It has a negative influence on their academic performance...