NDLI: Zinc polycarboxylate dental cement for the controlled release of an active organic substance: proof of concept.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ali, Mohammad Naseem Edwards, Mark Nicholson, John W.
Description	Country affiliation: United kingdom Author Affiliation: Ali MN ( Department of Pharmaceutical, Chemical and Environmental Sciences, School of Science, University of Greenwich, Chatham, Kent, UK.)
Abstract	The potential of employing zinc polycarboxylate dental cement as a controlled release material has been studied. Benzalkonium chloride was used as the active ingredient, and incorporated at concentrations of 1, 2 and 3% by mass within the cement. At these levels, there was no observable effect on the speed of setting. Release was followed using an ion-selective electrode to determine changes in chloride ion concentration with time. This technique showed that the additive was released when the cured cement was placed in water, with release occurring by a diffusion mechanism for the first 3 h, but continuing beyond that for up to 1 week. Diffusion coefficients were in the range 5.62 x 10(-6) cm(2) s(-1) (for 1% concentration) to 10.90 x 10(-6) cm(2) s(-1) (for 3% concentration). Up to 3% of the total loading of benzalkonium chloride was released from the zinc polycarboxylate after a week, which is similar to that found in previous studies with glass-ionomer cement. It is concluded that zinc polycarboxylate cement is capable of acting as a useful material for the controlled release of active organic compounds.
File Format	HTM / HTML
ISSN	09574530
Issue Number	4
Volume Number	21
e-ISSN	15734838
Journal	Journal of Materials Science: Materials in Medicine
Language	English
Publisher	Springer
Publisher Date	2010-04-01
Publisher Place	United States
Access Restriction	Subscribed
Subject Keyword	Discipline Biomedical Engineering Cariostatic Agents Administration & Dosage Dental Cements Polycarboxylate Cement Anti-infective Agents, Local Chemistry Pharmacokinetics Benzalkonium Compounds Biocompatible Materials Concept Formation Delayed-action Preparations Chemical Synthesis Dental Stress Analysis Glass Ionomer Cements Materials Testing Models, Biological Journal Article Validation Studies
Content Type	Text
Resource Type	Article
Subject	Biomaterials Biophysics Bioengineering Biomedical Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in