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April 2011 Diagnose the X-ray: Ask the Expert at Carestream Dental

April 15, 2011
Learn tips and tricks to produce better dental X-rays and identify the problem in this month’s Diagnose the X-ray for a chance to win a $25 gift card.
Ask the Expert for April 2011 from Carestream Dental
Christopher A. Warren
Technical Support Engineer
Imaging Consultant
Carestream Dental
Exclusive manufacturer of KODAK Dental Systems
Last month we asked you to Diagnose the X-ray below and send in your answers on what you think the operator may have done wrong. Today we provide you with the image’s diagnosis!We would like to congratulate David M. Goldberg, DDS, of Olney, Md., for correctly diagnosing the image below and winning a $25 gift card. Be sure to send in your diagnosis for this month’s Diagnose the X-Ray for a chance to win!
X-Ray AnswerImproper film (packet) positioning caused the problem in the image shown above. In this case, it seems that the packet was bent or flexed to better fit in the corner of an arch. Geometric distortion, or bending/flexing of the film, leads to common errors such as overlapped contacts or, in this case, excessive vertical angulation, which leads to inferior border of the mandible and elongated roots. This problem can be corrected by placing the film further into the center of the mouth. Tips and TricksGeometric distortion can have many causes, but it is easily minimized by following these recommendations:
  • The film should always be placed at right angles to the beam. For this reason, we recommend always using a film-holding and position-indicating device (PID).
  • Use a long X-ray source to object distance. This can be obtained using a long cone (40cm/16 inch) technique.
  • Use of the PID does not in and of itself prevent errors in the vertical and horizontal angulations of the film. It only ensures that the film is at the proper angle to the beam. The film and beam also need to be directed at right angles to the contact area. Follow proper use of the paralleling technique to minimize this problem.
  • Don’t rush the packet placement. Remember, careful film placement and beam alignment produces optimum quality results.
Diagnose the X-Ray
Here is our latest in a series of images for you to help identify the problem. Respond correctly for a chance to win a $25 gift card. What did the operator do wrong to achieve this image? Click here to answer.Be sure to look for the cause of the problem and Chris’s recommendation in our next issue!Contact UsHave a question or concern about your KODAK dental film? If so, contact Chris.Looking for an authorized dealer?Need more information about KODAK dental film, call (800) 933.8031 or visit© Carestream Health, Inc.The KODAK trademark and trade dress are used under license from Kodak.