Oral Health and Dental Management

Analysis of digital images acquired using phosphor storage plates (PSPs) subjected to varying delayed scans

12^th World Congress on Dentistry and Oral Health

August 04-05, 2016 Manchester, UK

Ehsan Tavakoli Hosseini, Sara Mohseni and Iman Tavakoli Hosseini

Shahid Sadoghi University of Medical Sciences, Iran
Tehran University of Medical Sciences, Iran

Posters & Accepted Abstracts: Oral Health Dent Manag

Abstract:

Objectives: The aim of this study was to determine the effect of various scan delays on diagnostic accuracy of inter-proximal caries detection. Methods: 45 non-cavitated extracted human permanent molar teeth with or without interproximal carious surfaces were radiographed using the DIGORA®PSP storage phosphor plates (SPPs) (Soredex Corporation, Helsinki, Finland). Plates were scanned immediately and 10 min, 30 min, 60 min, 6, 24, 48 hours after exposure. Diagnostic accuracy for caries detection was performed by scoring all the digital images. The true presence of caries was determined by stereomicroscopy. The accuracy was expressed as area under Rock curve (Az). Azs compared using two-way ANOVA and t-tests (SPSS17). Kappa was used to measure inter and intra-observer agreement. The accuracy was expressed as the area under the receiver operating characteristics curves (Az). Azs were compared using two-way ANOVA and t-tests. Kappa was used to measure inter and intra-observer agreement. Results & Discussion: The mean Az of immediately scanned images was significantly higher than the Azs of images with 6, 24 and 48h scan delays (p<0.05) but not for 10, 30, 60min (p>0.05). The mean Azs of immediately scanned plates were higher than the Azs of plates scanned with four different delays (p<0.05). The Az of immediately scanned images was significantly higher than the Azs of images with 60 min and 120 min scan delays (p<0.05) but not for 10 min and 30 min delays (p<0.05). MGVs of immediately scanned plates were significantly higher than the plates scanned with four different delays (p<0.05). Agreement decreased with increasing scan delays. Conclusions: Scanning of DIGORA SPPs should not be delayed beyond 60 min for accurate inter-proximal caries diagnosis. Longer periods may cause loss of image quality.

Biography :

Email: ehsantavakolihosseini@gmail.com