Purpose:
This survey aimed to investigate quality of communicating design features for
the construction of cobalt chromium removable partial dentures (RPDs) among
dentists in Riyadh, Saudi Arabia.
Materials and methods:
A survey of nine commercial dental laboratories located in Riyadh was carried out.
In each visit, master casts for cobalt chromium RPDs and dentists’ prescriptions were
examined. A quality score for the provided instructions was developed and ranged
from 0 to 4. A zero score means that no instructions were sent from the dentist for
the design of the RPD. A score of 4 means that instructions were provided for the
design of four main elements of the RPD, i.e., shape of major connector, type of
direct retainers, position of direct retainers, position of dental rests.
Results:
162 dentists’ prescriptions for RPDs and related casts were assessed. The majority
of RPD cases were designed by the dental technician alone (64.2%). Shape of
the major connector was the most frequent element in dentists’ prescriptions
(35.8%). The mean quality score of dentists’ instructions was 0.96 (sd=1.54). 18%
of the provided instructions achieved quality score equal to 4. Prescriptions for
Kennedy Class III cases achieved significantly higher mean quality score compared
to Kennedy Class II cases (p<0.05). 16.7% of the evaluated casts had clearly defined
rest seat preparation.
Conclusion:
The results of this survey indicate inadequate quality of communicating the design
features of cobalt chromium RPDs among practicing dentists in Riyadh, Saudi Arabia.
The reliance on the dental technician to design the cast RPDs seems to be high.