Quality of communication and master impressions for the fabrication of cobalt chromium removable partial dentures in general dental practice in England, Ireland and Wales in 2009

J Oral Rehabil. 2010 Apr;37(4):300-5. doi: 10.1111/j.1365-2842.2009.02055.x. Epub 2010 Jan 17.

Abstract

The aim of this study was to investigate the quality of communication and master impressions for the fabrication of cobalt chromium removable partial dentures (RPDs) in general dental practice in England, Ireland and Wales in 2009. Two hundred and ten questionnaires were distributed to 21 laboratories throughout England, Ireland and Wales. Information was collected regarding the quality of written communication and selection of master impression techniques for cobalt chromium partial dentures in general dental practice. One hundred and forty-four questionnaires were returned (response rate = 68%). Alginate was the most popular impression material being used in 58% of cases (n = 84), while plastic stock trays were the most popular impression tray, being used in 31% of cases (n = 44). Twenty-four per cent (n = 35) of impressions were not adequately disinfected. Opposing casts were provided in 81% of cases (n = 116). Written instructions were described as being 'clear' in 31% of cases (n = 44). In 54% of cases (n = 76), the technician was asked to design the RPD. Based on the findings of this study, written communication for cobalt chromium RPDs by general dental practitioners is inadequate. This finding is in breach of relevant contemporary legal and ethical guidance. There are also concerns in relation to the fabrication process for this form of prosthesis, particularly, in relation to consideration of occlusal schemes.

MeSH terms

  • Chromium Alloys*
  • Dental Casting Investment*
  • Dental Impression Materials
  • Dental Impression Technique*
  • Dental Materials
  • Dental Models
  • Denture Design
  • Denture, Partial, Removable*
  • England
  • General Practice, Dental
  • Humans
  • Ireland
  • Laboratories, Dental / statistics & numerical data*
  • Practice Patterns, Dentists' / statistics & numerical data
  • Reproducibility of Results
  • Wales

Substances

  • Chromium Alloys
  • Dental Casting Investment
  • Dental Impression Materials
  • Dental Materials