Score system for behaviour of radiologically diagnosed approximal carious lesions

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Abstract
The evolution of systems which monitor changes in the severity of approximal carious lesions diagnosed from serial bitewing radiographs is reviewed. These systems derive a ''score'' for each individual lesion based upon the extent of its progression. A new lesion behaviour score system is described which, unlike its predecessors, allows both lesion regression and data from partially overlapped but readable surfaces to contribute to scores. It employs scoring codes from a previously proposed standardized grading system which is compatible with WHO recommendations for grading clinical caries. The score system is designed to be used as a computer program capable of running on a variety of readily available microcomputers; this allows the incorporation of a flexible range of additional options which use the standard data files to calculate scores according to differing conventions. These accommodate variations in: the threshold at which restorative intervention is practiced, the treatment of reversals of caries diagnosis, the threshold of caries diagnosis and the way in which partially overlapped surfaces are scored. These options allow the system to be configured to suit the local needs of different investigations and workers, and also permit the study of the effects of these various methodologies.