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Purpose: The aims of this study were to investigate the quality of written instructions given
to dental laboratories for fabrication of chrome-cobalt removable partial dentures (RPD) in
Ireland, and to examine the extent and nature of technical/laboratory support available for
the fabrication of this prosthesis type. Materials and Methods: All dental laboratories listed
in the commercial telephone book were contacted and invited to participate in the study.
Written instructions received by dental technicians for fabrication of chrome-cobalt RPDs
were examined for evidence of four design variables: denture base configuration, retention,
support, and connector design. The use of diagrams was also examined. Results: Of 112
dental laboratories listed, 100 agreed to take part. Sixteen laboratories had the facilities to
fabricate chrome-cobalt frameworks on their premises; 122 sets of written instructions were
received. All four design variables were described in 10% (n = 12) of instructions, 7% (n =
9) contained reference to three variables, 13% (n = 16) contained reference to two variables,
and 17% (n = 20) contained reference to one variable. No design features were prescribed
in 53% (n = 65), and 5% (n = 6) requested the technician to design the prosthesis. Only 7%
(n = 8) of instructions included a diagram. Conclusion: A high proportion of written
instructions to dental laboratories regarding fabrication of chrome-cobalt RPDs contained
no reference to the mentioned design variables. Int J Prosthodont 2003;16:362–364.
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