Vikas Punia, Vivek Sharma, Meenakshi Khandelwal, Sandhya Kapoor Punia

ABSTRACT

Statement of problem: Various studies has been conducted to evaluate and compare the accuracy of marginal fit by digital Cad-Cam Technique and Conventional Lost wax technique. But the result varied in each studies. Hence to determine the best of either there is a need for evidence based report. Purpose: To systematic review and meta-analysis was to compare the marginal discrepancy induced by CAD/CAM technique and conventional ceramic processing techniques in all ceramic complete veneer Material and method: A search strategy was completed using PubMed, Science Direct, Ebsco-host, Google Scholar, CENTRAL (Cochrane Central Register of Controlled Trials) based on a Population, Intervention, Comparison, and Outcome (PICO) framework using suitable keywords. The studies were screened and independently reviewed by two researchers against predetermined criteria for eligibility. As a result of this screening studies were included for meta-analysis. For the statistical analysis, the mean marginal fit values of each study were extracted and categorized according to the technique of All Ceramic copping fabrication and then meta-analysis were performed. Result: Ten studies were included in the meta-analysis from the 157 identified records after database searching. A random effect model and fixed effect model was used for analysis. The results for marginal discrepancy demonstrate statistically significant heterogeneity with Q = 43.637 and d.f. = 9, which gives a p-value < 0.0001. For fixed effect model the estimated MD = 0.111 and the 95% CI is [0.174; 0.609] .From the random- effects model, the estimated MD = -0.264 and the 95% CI is [-0.197; 0.836] which indicates a statistically significant difference between the conventional lost wax technique and digital CAD CAM technique in terms of absolute marginal discrepancy.the result showed that the Digital technique of fabricating All ceramic fixed prosthesis can significantly reduce the absolute marginal discrepancy when compared with the conventional lost wax technique. Conclusion: A significant reduction in absolute marginal discrepancy was observed with digital CAD CAM technique for fabrication of All-ceramic fixed prosthesis when compared with the marginal discrepancy. Though all the values extracted from various studies were under the clinical acceptable range of marginal discrepancy.