Authors: RADHI, A.¹; LYNCH, C. D.²; HANNIGAN, A.³

Source: Journal of Oral Rehabilitation, Volume 34, Number 2, February 2007 , pp. 153-157(5)

Publisher: Wiley-Blackwell

Abstract:

summary 

 The aim of this study was to examine the quality of written instructions and choice of impression trays and materials for removable partial dentures (RPDs) in the Kingdom of Bahrain. All six private dental laboratories in Bahrain were contacted and invited to participate in the study. Five laboratories participated, and submitted written instructions received by them for fabrication of both acrylic (A-RPDs) and cobalt-chromium (CC-RPDs) RPDs. These were examined for evidence of selected design variables. Types of impression trays and materials used were also recorded. One hundred and thirty-one written instructions were examined. Eleven percent (n = 14) were for CC-RPDs, 89% (n = 117) for A-RPDs. All treatments were provided on a private basis. Fifty-seven percent (n =1 8) of CC-RPD instructions requested the technician to design the prosthesis, 43% (n = 6) contained a diagram and 43% (n = 6) mentioned all design variables. Seventy-nine percent (n = 92) of A-RPDs requested the technician to design the denture, and only 1% (n = 1) mentioned all design variables. Alginate impression material was most commonly used for master impressions (83% of impressions (n = 109); 85% (n = 99) of A-RPDs, and 71% (n = 10) of CC-RPDs). Master casts were poured after a minimum of 24 h. Acrylic custom trays were used in 14% (n = 19) of cases (43% (n = 6) of CC-RPDs; 13% (n = 15) of A-RPDs). The quality of written instructions to dental laboratories for the fabrication of RPDs was found to be inadequate in Kingdom of Bahrain. There was widespread use of inappropriate impression trays and materials.

Keywords: removable partial dentures; design; prosthesis; impressions; dental laboratories; cobalt chromium; acrylic

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1365-2842.2006.01685.x

Affiliations: 1: Specialist Prosthodontist, Gulf Dental Specialty Hospital, Manama, Kingdom of Bahrain 2: Senior Lecturer/Consultant in Restorative Dentistry, Cardiff University School of Dentistry, Cardiff, UK 3: Department of Mathematics and Statistics, University of Limerick, Limerick, Ireland

Publication date: 2007-02-01

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