The major disadvantages of PSPs are remaining stored energy in the plate before and even after scanning, lower quality due to repeated use, and the need for additional time for handling and scanning.
Other advantages of PSP systems include being available in exactly the same size as conventional film and having a wider dynamic range, which produces better quality radiographs compared with CCD and CMOS sensors. PSP image receptor systems are distinguished from other types by special features of the plate-thin structure and flexibility-and by the absence of an electrical cord, qualities that make it easier to place the receptor into the mount. In actuality, the PSP system can be referred to as a semidirect imaging system.
These digital image receptors are also broadly classified as direct (CCD, CMOS) and indirect (PSP). Several systems have been introduced for intraoral digital radiography, and they can be divided into three groups according to their sensor types : Charge-Coupled Device (CCD), Complementary Metal Oxide Semiconductor (CMOS), and Photostimulable Phosphor Plate (PSP). Within the limitations of the current study, it can be concluded that scanning delay causes a reduction in image quality, and using the manufacturer's original protective case will result in better performance of PSPs.ĭue to advancements in technology, digital radiography is widely used in dental practice. Reduction in image quality began 5 min after exposure in the other Dürr plate groups. MGVs increased with increasing scanning delay, except the group with Dürr plates in their original cases. ANOVA revealed that the MGVs of four steps of the wedges were significantly different from each other for all scan delays ( P < 0.001). Statistically significant differences were found between the two PSPs ( P < 0.001). Mean gray values (MGVs) of the 3rd, 5th, 7th, and 9th steps of the wedges were compared using ANOVA. These plates were placed in three different protective plastic cases (manufacturers' original cases, black case, and white case) before obtaining the radiographs and were then processed immediately and 1, 5, 10, 30, 60, 120, 240, and 480 min after exposure. Two PSPs using an aluminum step wedge were exposed. The purpose of this study was to analyze two phosphor plate systems (PSPs) (Dürr Dental, Digora Optime) according to their scanning delay and protective plastic case performances.