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Influence of extensive use of a photostimulable phosphor receptor on the diagnosis of proximal carious lesions: an in vitro study

Published:November 11, 2022DOI:https://doi.org/10.1016/j.oooo.2022.11.004

      STATEMENT OF CLINICAL RELEVANCE

      • Intraoral PSP receptors can be used multiple times (up to a least 1600 exposures to X-rays and scannings) without the need for replacement, as long as they have not been physically damaged.

      Abstract

      Objective

      : To evaluate the influence of extensive use of a photostimulable phosphor (PSP) receptor on the diagnosis of proximal carious lesions.

      Study Design

      : Forty posterior teeth were paired and mounted in 20 phantoms. Using a PSP receptor of the Express intraoral system, one radiograph of each phantom was acquired, totaling 20 radiographs (Group 1). After 400 acquisitions, another radiograph of each phantom was obtained, totaling 20 new radiographs (Group 2). This procedure was also done after 800 (Group 3), 1200 (Group 4), and 1600 (Group 5) acquisitions, resulting in 100 radiographs. Another 40 radiographs (20 phantoms x 2 groups) were obtained with a second PSP sensor to evaluate the diagnostic replicability of the receptors. All 140 radiographs were assessed independently by 5 observers for the presence of proximal caries. Area under the receiver operating characteristic curve, sensitivity, and specificity were calculated and compared among the groups by analysis of variance. The Student t test evaluated the diagnostic replicability of the receptors. Significance level was set at 5% (P<0.05).

      Results

      : The diagnostic outcomes for proximal caries did not differ among the groups (P≥.37). The diagnostic values did not differ among the radiographs acquired with the 2 PSP receptors (P ≥.75).

      Conclusions

      : The diagnosis of proximal carious lesions was not affected by extensive use of the PSP receptor.

      Keywords

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