Correlation between polymerization shrinkage and marginal fit of temporary crowns

Dental Materials : Official Publication of the Academy of Dental Materials
Markus BalkenholBernd Wöstmann

Abstract

During polymerization, temporary c&b materials (t-c&b) undergo shrinkage which may lead to marginal inaccuracies of the temporary restoration. The degree of correlation between these two factors is still unknown. Hence, the objective of this study was to determine the polymerization shrinkage of t-c&bs and to evaluate, to which degree the shrinkage is correlated to the width of the marginal gap. Six different t-c&bs (2 monomethacrylates and 4 dimethacrylates) were used to fabricate temporary crowns (n = 12) on two prepared teeth (stainless steel) of different diameters (5 and 7 mm). The crown diameters and marginal discrepancy were measured at various storage times after mixing (10, 30, 60 min) using a travelling microscope. In addition, the shrinkage (bonded-disk method) and content of inorganic filler (ashing method) were recorded. The statistical analysis was carried out using parametric tests, the F-test and Pearson's correlation (p = 0.05). The marginal discrepancies increased as a function of increasing storage time (10 min: 0.162-0.218 mm; 60 min: 0.271-0.521 mm). Lower values were recorded for monomethacrylates than for the dimethacrylates (greatest changes recorded during the first 30 min). The shrinkage values recorde...Continue Reading

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Citations

Aug 8, 2012·The Journal of Prosthetic Dentistry·Christina ErbeMarkus Balkenhol
Jan 18, 2016·The Journal of Prosthetic Dentistry·Kwang Yong Kelvin KhngFang Qian
Apr 7, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Karin KitzmüllerAndreas Schedle
Jan 8, 2013·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Noor A NawaflehMuhanad M Hatamleh
Dec 24, 2010·Dental Materials : Official Publication of the Academy of Dental Materials·Vanessa AltMarkus Balkenhol
Oct 7, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Wojtek LibeckiMatthias Kern
Sep 7, 2017·The Journal of Advanced Prosthodontics·Wan-Sun LeeKyu-Bok Lee
Aug 24, 2018·Dental Materials Journal·Adil O AbdullahYi Liu
Feb 28, 2015·The Journal of Advanced Prosthodontics·Isil KaraokutanOzlem Kara
Sep 4, 2020·The Journal of Advanced Prosthodontics·Tanapon ReeponmahaThidarat Angwarawong

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