Epidemiologic Studies in Dental Caries. V. Placement of Fillings as a Source of Statistical Error of Estimate as to Dental Caries Progression Rates

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Abstract
This study deals with the increase in the number of tooth surfaces showing decay or fillings which may be observed immediately after the placement of fillings, due solely to the operative extension of cavities rather than decay. 60% of the subjects showed increased caries scores attributable to placement of fillings alone; in some subjects the post-operative was twice the preoperative value. Of those whose scores were increased, the median degree of increase was 25%. The need for the consideration of the degree of dental repair, the number and identity of carious teeth and the post-eruptive age of teeth in the selection of a group of subjects for controlled studies as well as consideration of the degree of effect which placement of fillings during the course of a controlled study may have on the apparent course of caries among the mouths of the subjects of the study is emphasized.

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