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The International Journal of Prosthodontics
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Int J Prosthodont 31 (2018), No. 2     29. Mar. 2018
Int J Prosthodont 31 (2018), No. 2  (29.03.2018)

Page 120-123


Effects of Impression Material, Impression Tray Type, and Type of Partial Edentulism on the Fit of Cobalt-Chromium Partial Denture Frameworks on Initial Clinical Insertion: A Retrospective Clinical Evaluation
Baig, Mirza Rustum / Akbar, Jaber Hussain / Qudeimat, Muawia / Omar, Ridwaan
Purpose: To evaluate the effects of impression material, impression tray type, and type of partial edentulism (ie, Kennedy class) on the accuracy of fit of cobalt-chromium (Co-Cr) partial removable dental prostheses (PRDP) in terms of the number of fabricated frameworks required until the attainment of adequate fit.
Materials and Methods: Electronic case documentations of 120 partially edentulous patients provided with Co-Cr PRDP treatment for one or both arches were examined. Statistical analyses of data were performed using analysis of variance and Tukey honest significant difference test to compare the relationships between the different factors and the number of frameworks that needed to be fabricated for each patient (α = .05).
Results: Statistical analysis of data derived from 143 records (69 maxillary and 74 mandibular) revealed no significant correlation between impression material, tray type, or Kennedy class and the number of construction attempts for the pooled or individual arch data (P ≥ .05).
Conclusion: In PRDP treatment, alginate can be chosen as a firstchoice material, and metal stock trays can be a preferred option for making final impressions to fabricate Co-Cr frameworks.