IADR Abstract Archives
Evaluation of intraoral sensors for detection of simulated occlusal caries.
Objectives: To compare the diagnostic accuracy of three different digital intraoral sensors for detection of simulated occlusal caries.
Methods: 120 non-carious human molars were obtained for the study. Simulated carious lesions were prepared on 90 teeth with a #2, #4, or #6 round bur in either the mesial, central, or distal pit. The remaining teeth were controls. Location of simulated caries for each tooth was noted on a key. Then teeth were mounted in groups of 3 in plaster blocks. All blocks of teeth were imaged with the following three sensors: Carestream 6100, Dexis Platinum, and Planmeca Prosensor HD using an x-ray unit with optical bench for standardized technique. Four raters evaluated all the radiographic images, twice, in two sessions. Raters scored the presence or absence of simulated occlusal caries. Sensitivity of each sensor was calculated. Inter-rater and intra-rater reliability was computed.
Results: Overall sensitivity of the three sensors is: PlanMeca 81.39%, Dexis 78.75% and Carestream 46.67%. These sensitivities were found significantly different (P < 0.0001).
Sensitivity according to bur size is shown in the accompanying table.
Conclusions: Diagnostic accuracy of PlanMeca sensor was the highest in this study. However, Dexis was only 2.64% lower in sensitivity than PlanMeca. Comparison of different bur sizes showed PlanMeca was the most sensitive, with the exception of the #6 bur, where Dexis had a 0.4% better sensitivity. Carestream was the least sensitive. Inter-rater agreement was highest with the Dexis sensor. Higher intra-rater agreement was also found between three of the four raters with Dexis sensor.
Methods: 120 non-carious human molars were obtained for the study. Simulated carious lesions were prepared on 90 teeth with a #2, #4, or #6 round bur in either the mesial, central, or distal pit. The remaining teeth were controls. Location of simulated caries for each tooth was noted on a key. Then teeth were mounted in groups of 3 in plaster blocks. All blocks of teeth were imaged with the following three sensors: Carestream 6100, Dexis Platinum, and Planmeca Prosensor HD using an x-ray unit with optical bench for standardized technique. Four raters evaluated all the radiographic images, twice, in two sessions. Raters scored the presence or absence of simulated occlusal caries. Sensitivity of each sensor was calculated. Inter-rater and intra-rater reliability was computed.
Results: Overall sensitivity of the three sensors is: PlanMeca 81.39%, Dexis 78.75% and Carestream 46.67%. These sensitivities were found significantly different (P < 0.0001).
Sensitivity according to bur size is shown in the accompanying table.
Conclusions: Diagnostic accuracy of PlanMeca sensor was the highest in this study. However, Dexis was only 2.64% lower in sensitivity than PlanMeca. Comparison of different bur sizes showed PlanMeca was the most sensitive, with the exception of the #6 bur, where Dexis had a 0.4% better sensitivity. Carestream was the least sensitive. Inter-rater agreement was highest with the Dexis sensor. Higher intra-rater agreement was also found between three of the four raters with Dexis sensor.