PSP Plate Scanner: Emerging System in Digital Dental Imaging

Nowadays, digital radiography is widely used in dental practice. Due to some special assets such as shorter exposure to radiation, capability to use peculiar software to adjust the quality of images, simple way of storing and other spectacular advantages, conventional radiography has been gradually replaced by digital radiography.

One of the most common types of these systems is Photo Stimulated Phosphor Plate (PSP). Thin structure, flexibility and by the absence of a connecting wire, these features facilitate placement of PSP receptor into the mouth.

Principle: Photostimulated luminescence

Photostimulated luminescence (PSL) is the release of stored energy within a phosphor by stimulation with visible light, to produce a luminescent signal. X-rays may induce such energy storage. A plate-based on this mechanism is called a photostimulable phosphor (PSP) plate. Creating an image requires illuminating the plate twice: the first exposure, to the radiation of interest, “writes” the image, and a later, second illumination (typically by a visible-wavelength laser) “reads” the image.

Structure and mechanism

On photostimulable phosphor (PSP) plates, the phosphor layer is typically 0.1 to 0.3 mm thick. After the initial exposure by X-ray , excited electrons in the phosphor material remain ‘trapped’ in ‘colour centres’ in the crystal lattice until stimulated by the second illumination. PSP plates store absorbs x-ray energy in crystal structure in the form of trapped electron and constitute a latent image. This deposited energy can be released if stimulated by additional light with proper wavelength.

Flexible PSP system is more beneficial than rigid big digital sensors:

Flexible phosphor sensors do offer several advantages over rigid sensors. For example, flexible phosphor sensors are available in the exact same size as film, unlike rigid sensors, which have a smaller usable image area. Also, flexible phosphor sensors offer simpler and more convenient sensor placement. Rigid sensors are more than 4-mm thick and larger than film or flexible phosphor sensors, which can make them difficult or even impossible to accurately position with patients who are unable to open their mouths wide or who have small mouths, gag reflexes, large tori, or shallow palatal vaults. With flexible phosphor sensors, practices are more likely to be able to capture 100% of the radiographs they need.

Flexible phosphor sensors generally offer a larger image area than direct sensors; therefore, the clinician can more accurately see and measure the complete coronal-to-apical length and obtain more mesial-distal information. In addition, the practice is less likely to miss a distal cusp or a root tip, which will save time by decreasing the number of retakes needed. Fewer retakes also translates to less overall radiation exposure.

Unicorn Denmart Ltd is one stop solutions for every dental practitioner for PSP systems. With the choice of amazing, tested, credible and high quality products among PSPs, every dental practitioner can utilise the benefits of flexible PSP system. The high quality PSP systems from Durr Germany and Apixia California are available for every clinic to get the maximum benefits and upgrade the patient comfort and clinical practise.

VistaScan Mini:

The grey scale graduation of the image plate with VistaScan Mini permits a presentation commensurate with the quality of the plate. With the proven engineering and outstanding image quality characteristic of Dürr Dental image plate scanners worldwide. Made in Germany,  VistaScan Mini Plus has been awarded – “red dot design award winner 2011“.

VistaScan Mini has 3 variants as per requirement.

  1. VistaScan Mini Easy – available with size 0 and size 2 scanning plates
  2. VistaScan Mini Plus – available with size 0 to size 4 scanning plates
  3. VistaScan Mini View – available with size 0 to  size 4 scanning plates


Apixia, Inc. draws from a rich 25-year history of excellence and quality in dental manufacturing. Designed in Southern California, the company’s Asian facility includes an extensive manufacturing operation, engineering department, and support offices for international customers.

Apixia has invested heavily in the design and assembly of its own products, and is fully-integrated for maximum efficiency. As further validation of its quality and integrity to global standards, all Apixia products have been awarded ISO 9001:2008 and ISO 13485:2003 certification and meet all required international standards.


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