OSCE Practice – Radiography: Foreshortening Error
Practise recognising and correcting foreshortening errors in dental radiographs, following NEBDN OSCE expectations.
Scenario
A periapical radiograph is taken of a patient’s upper incisors. The image shows the crowns and roots appearing much shorter than normal.
Your Task
- Identify the radiographic error
- Determine the cause of foreshortening
- Apply corrective measures
- Recommend appropriate technique
- Support safe and accurate radiographic practice
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Key Learning Points
- Foreshortening is caused by excessive vertical angulation of the X-ray beam
- The correction is to reduce vertical angulation appropriately
- The paralleling technique is least prone to foreshortening errors
- Foreshortening is more common with the bisecting-angle technique
- Foreshortened images reduce diagnostic accuracy, particularly for root and periapical assessment