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A randomised controlled trial to compare three therapeutic interventions in patients with self-declared illnesses due to dental amalgam fillings
ISRCTN ISRCTN51459238
DOI 10.1186/ISRCTN51459238
ClinicalTrials.gov identifier
EudraCT number
Public title A randomised controlled trial to compare three therapeutic interventions in patients with self-declared illnesses due to dental amalgam fillings
Scientific title
Acronym GAT (German Amalgam Trial)
Serial number at source N/A
Study hypothesis Not provided at time of registration
Lay summary
Ethics approval Not provided at time of registration
Study design Randomised controlled trial
Countries of recruitment Germany
Disease/condition/study domain Symptoms attributed to amalgam fillings
Participants - inclusion criteria 90 patients with symptoms attributed to amalgam fillings
Participants - exclusion criteria Patients with confirmed mental disorders or organic diseases were excluded
Anticipated start date 01/11/1998
Anticipated end date 31/07/2004
Status of trial Completed
Patient information material
Target number of participants 90
Interventions Group 1: Removal of amalgam fillings and restoration with composites and other dental materials
Group 2: Removal of amalgam fillings and restoration with composites and other dental materials + mobilisation of mercury with complementary drug treatment
Group 3: No removal of amalgam fillings; psychosocial group intervention
Primary outcome measure(s) Not provided at time of registration
Secondary outcome measure(s) Not provided at time of registration
Sources of funding German Association of Foundations for Science (Stifterverband der Deutschen Wissenschaft) (Germany)
Trial website
Publications 2008 results in http://www.ncbi.nlm.nih.gov/pubmed/18362317
Contact name Dr  Dieter  Melchart
  Address Centre for Complementary Medicine Research
Dept. Internal Medicine II
Technical University Munich
Kaiserstr. 9
  City/town Munich
  Zip/Postcode 80801
  Country Germany
  Tel +49 (0)89 72669711
  Fax +49 (0)89 72669721
  Email Dieter.Melchart@lrz.tu-muenchen.de
Sponsor Munich Technical University - Centre for Complementary Medicine Research (Germany)
  Address Dept. Internal Medicine II
Technical University Munich
Kaiserstr. 9
  City/town Munich
  Zip/Postcode 80801
  Country Germany
  Tel +49 (0)89 72669711
  Fax +49 (0)89 72669721
  Email Dieter.Melchart@lrz.tu-muenchen.de
Date applied 10/02/2005
Last edited 10/09/2009
Date ISRCTN assigned 29/07/2005
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