The PAR (Peer Assessment Rating) Index was compared to the grading system currently in use for completed orthodontic cases at the Dental Practice Board of England and Wales. Forty completed cases were graded by the two systems, which were compared for their intra- and inter-examiner reliability, as well as for their agreement and disparity in judging outcomes of cases. The implications of the results on the monitoring of standards in the General Dental Services are discussed.
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