Marginal Accuracy of Cast Crowns Fabricated Using Different Investment Systems (An In -Vitro Study)

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Radhika Agnihotri
Kartik Morjaria
Kalpesh Vaishnav
Dipti Shah
Ravi Joshi
Miloni Bhatt
Khushbu Baraiya

Abstract

Context: Any dental restoration's marginal fit is very important for its success. The teeth and the adjacent periodontal tissues- both may suffer from an inadequate fit. Aims: to assess how various investment systems affect the marginal accuracy of cast crowns.  Method: A total of 60 complete coverage crowns made entirely using metal on metal dies. The crowns were separated into 4 groups each with 15 patterns.  For investing and casting a ringless system and a ring system (split)  were used in group B and group A respectively.  In Group C metal rings with single layer cellulose acetate liners devoid of asbestos is used and Group D metal rings with double-layer cellulose acetate liners devoid of asbestosis used. By measuring the distance with a microscope between the die's finish line and the edges of the crown, marginal discrepancy was determined. Results Groups -A, B, C, D -each had a mean marginal disparity of 113µm, 210µm, 206µm, and 161µm, respectively. The 4 groups' marginal discrepancies on each surface were compared. Of the four groups, Group A was the most accurate, while Group B was the least accurate. Conclusion: The ringless casting process can result in with better marginal fit due to accurate casting.

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Radhika Agnihotri, Kartik Morjaria, Kalpesh Vaishnav, Dipti Shah, Ravi Joshi, Miloni Bhatt, & Khushbu Baraiya. (2022). Marginal Accuracy of Cast Crowns Fabricated Using Different Investment Systems (An In -Vitro Study). Journal of Coastal Life Medicine, 10(3), 274–282. Retrieved from https://jclmm.com/index.php/journal/article/view/190
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