Toggle Main Menu Toggle Search

Open Access padlockePrints

A study to investigate and compare the physicomechanical properties of experimental and commercial temporary crown and bridge materials

Lookup NU author(s): Dr Bana AbdulmohsenORCiD

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

Objectives. To develop two experimental temporary crown and bridge materials with improved physicomechanical properties.Methods. Commercial materials: Trim (TR, monomethacrylate, Bosworth) and Quicktemp2 (QT, dimethacrylate, Schottlander). Experimental materials: isobutyl methacrylate/poly(ethyl methacrylate) (IBMA/PEM) and n-butyl methacrylate/PEM (nBMA/PEM), both monomethacrylates. For water absorption/desorption studies rectangular samples (40 mm x 10 mm x 1 mm) of each material were prepared, immersed in deionized water (DW, control) and artificial saliva (AS), and weighed at regular time intervals. %solubility and diffusion coefficients (D) for uptake/loss processes were calculated and compared with theoretical predictions. Polymerization exotherm (cylindrical samples 10 mm x 18 mm) and flexural moduli were measured (three point bending; rectangular samples 80 mm x 10 mm x 4 mm, dry and after 9 days storage in DW). The data were compared statistically.Results. QT and nBMA/PEM had lower %equilibrium uptakes/loss in DW (0.68%/0.884% and 0.64%/0.895% respectively). QT had the lowest water absorption/desorption D (P < 0.05) compared to the three monomethacrylates, in DW and AS. %solubility for all systems showed no differences in DW (P > 0.05), but a difference for QT in AS (P < 0.05). QT reached its maximum temperature rapidly (similar to 2 min; 3 monomethacrylates similar to 7-13 min). The commercial materials exhibited high peak temperatures (similar to 51 degrees C, P <0.05; experimental materials similar to 43 degrees C). QT had a higher flexural modulus (similar to 4 GPa; 3 monomethacrylates similar to 0.7-1 GPa) for dry and wet samples. The moduli for commercial materials reduced significantly after immersion in DW; there was no difference between the dry and wet experimental materials samples (P > 0.05).Significance. The experimental materials merit further studies since they presented with lower setting exotherms, and contained no phthalate plasticizer, thus being less of a risk to patients. (C) 2015 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.


Publication metadata

Author(s): Abdulmohsen B, Parker S, Braden M, Patel MP

Publication type: Article

Publication status: Published

Journal: Dental Materials

Year: 2016

Volume: 32

Issue: 2

Pages: 200-210

Print publication date: 01/02/2016

Online publication date: 31/12/2015

Acceptance date: 30/11/2015

ISSN (print): 0109-5641

ISSN (electronic): 1879-0097

Publisher: Elsevier Science Ltd.

URL: http://dx.doi.org/10.1016/j.dental.2015.11.025

DOI: 10.1016/j.dental.2015.11.025


Altmetrics

Altmetrics provided by Altmetric


Share