OSCE Practice – Radiography: Incorrect Film/Plate Placement

Practise recognising and correcting film and sensor placement errors in dental radiographs, following NEBDN OSCE expectations.

Scenario

A periapical radiograph is taken of the upper premolars. On review, the apices are not visible, and the crowns appear tilted.

Your Task

  • Identify the radiographic error
  • Determine the cause of incorrect placement
  • Apply corrective measures
  • Recommend appropriate technique
  • Support safe and accurate radiographic practice

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Key Learning Points

  • Missing apices are usually caused by incorrect sensor placement too high or insufficient coverage of the root area
  • Crowns being cut off is due to incorrect positioning of the sensor too low
  • Using a film/sensor holder (paralleling technique) helps prevent placement errors
  • Poor plate positioning can lead to distorted or incomplete images, reducing diagnostic quality
  • Incorrect placement increases the risk of misinterpreting pathology or missing clinical findings
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