Year : 2024

Volume : Volume 15

Issue : Issue 4

Address for correspondence :
Dr. Disha Kamavisdar
disha.kamavisdar@gmail.com

Abstract

Purpose: This systematic review and meta-analysis was conducted to assess the importance of bond strength of re-casted base metal alloys used for dental restorations. Materials and Methods: This review follows the Preferred Reporting Items for Systematic Review and MetaAnalysis (2020) guidelines for systematic review and meta-analyses. An electronic literature search was performed through search engines such as (MEDLINE/PubMed), Cochrane Central Register of Controlled Trials, Science Direct databases using the MESH terminologies “Base metal alloy” “Nickel-chromium alloy” and “tensile strength.” The research question was formulated as – “What is the bond strength of recasted base metal dental alloy as a restoration material as compared to the original casting?” using the Population, Intervention, Comparison, Outcome and Study framework. The risk of bias for quasi-randomized studies was assessed by methodological index for non-randomized studies tool. Total 121 articles were found eligible for screening after performing an extensive electronic literature search out of which 54 of them were found duplicates, 31 of them were eliminated using automated tools as they were in retrievable for appropriate data. Furthermore, 23 articles were screened for the assessment out of which 19 full-text articles were excluded for providing irrelevant data. After the screening four full-text articles met the eligibility criteria for the final assessment in this systematic review and meta-analyses. Recasting of base metal alloys with other metals has shown a reduction in the shear bond strength when compared with the original metal casting. Result: Ninety-two samples were assessed in each section. The bond strength of fresh alloy was found not significantly better with a mean difference of 1.12 (95% CI; −0.06; 2.31) at P = 0.06. Conclusion: Out of all the four studies evaluated, each study has shown a strong link between the bond strength of base metal alloys and the frequency of recasting procedure. Studies (2) and (31) suggests that an increase in the frequency and a change in the composition and percentage of the mixture of metal in the alloys during recasting procedure has shown a significant decline in the bond strength of the base metal alloys which have affected the durability and clinical performance of the dental restorations. Hence, this review suggests that further scope of research exists so as to find out the alternatives of recasted and recycled metals for dental restoration purpose.