UNIVERSITAS AIRLANGGA



Detail Article

Dental Journal (Majalah Kedokteran Gigi)

ISSN 1978-3728

Vol. 39 / No. 3 / Published : 2006-07

Related with : Scholar   Yahoo!   Bing

Original Article :

The copper concentration variation to physical properties of high copper amalgam alloy

Author :

  1. Aminatun*1
  1. Department of Physics Faculty of Mathematics and Physics Airlangga University Surabaya - Indonesia

Abstract :

The function ofcopper (Cu) inside amalgam is to increase hardness and impact force and to decrease thermal expansion coefficient. In general, amalgam which is used in dentistry and available in the market is contain Cu 22%, while the maximum Cu concentration is 30%. It is necessary to determine the concentration Cu does generate the best physical properties to be used as dental restorative agent. Amalgam is made by mixing blended-metal Ag-Sn-Cu (with Cu concentration of 13%, 21%, 22%, and 29%) and Hg, stirred manually in a bowl for 15 minutes,leave it in temperature 27°C for 24 hours to become hardened. The result of X-Ray Diffractometer (XRD), analyzed by Rietveld method and Rietica program, shows amalgam with Cu 29% concentration for Cu3Sn compound density is 31.790 sma/Å3, for Ag2Hg3 compound is 41.733 sma/ Å3, a Cu3Sn relative weight percentage of 43.23%, Ag2Hg3 of 54.54%, Cu7Hg6 of 2.23% and hardness of Cu 29% is 90.700 ± 0.005 kgf/mm2. These numbers are the highest values on Cu 29% concentrations compared to other copper concentration variants. Whereas amalgam thermal expansion coefficient on Cu 29% is (2.17 ± 0.91)10-3 mm/°C is the lowest value compared to other Cu concentration. The conclution is that adding Cu concentration into amalgam will increase density value, Cu3Sn relative weight percentage, hardness level and will decrease amalgam thermal expansion coefficient. Amalgam 29% Cu concentration has better physical properties compared to amalgam Cu 22% concentration.

Keyword :

amalgam, Cu, density, hardness level, thermal expansion coefficient ,


References :

Craig,(2002) Restorative dental materials St Louis : Mosby

Power,(2002) Restorative dental materials St Louis : Mosby

Combe,(1992) Notes on dental materials Edinburgh, London : Churchill Livingstone

Craig,(2000) Dental materials properties and manipulation St Louis : Mosby. Inc

Power,(2000) Dental materials properties and manipulation St Louis : Mosby. Inc

Wataha,(2000) Dental materials properties and manipulation St Louis : Mosby. Inc

Ford,(1993) Restorasi gigi Jakarta : Buku Kedokteran EGC

Pratapa,(2004) Prinsip-prinsip dan implementasi metode rietvelt untuk analisis data difraksi sinar-X Surabaya : Lembaga Penelitian ITS

Hill,(1993) Data collections strategis: fitting the experiment to the need intensification the Rietveld method Oxford : Oxford University Press

Hill,(1986) Quantitative phase analysis form neutron powder data using the Rietveld method

- : Journal Appl Crystallography



Archive Article

Cover Media Content

Volume : 39 / No. : 3 / Pub. : 2006-09
  1. Periodontal Tissue Damage In Smokers
  2. Management Of Oral Focal Infection In Patients With Asthmatic Symptoms
  3. The Copper Concentration Variation To Physical Properties Of High Copper Amalgam Alloy
  4. Is It Possible To Distinguish The Understanding Of Denture Adhesive Between Japanese Dental Students And Indonesian Peers By A Questionnaire?
  5. Mandible Vertical Height Correction Using Lingual Bone-split Pedicle Onlay Graft Technique
  6. Facial, Upper Facial, And Orbital Index In Batak, Klaten, And Flores Students Of Jember University
  7. Effects Of Orthodontic Forces On Pulp Tissue
  8. The Effect Of Humidity On Peak Value Of Hema Carbonyl Absorbance Band
  9. Anticarcinogenesis Effect Of Gynura Procumbens (lour) Merr On Tongue Carcinogenesis In 4nqo-induced Rat
  10. Clinical Evaluation In Periodontitis Patient After Curettage

Information DENTJ