OSCE Practice – Radiography: Elongation Error
Practise recognising and correcting elongation errors in dental radiographs, following NEBDN OSCE expectations.
Scenario
A periapical radiograph is taken of a patient’s lower molars. When you review the image, the teeth appear unusually long and distorted.
Your Task
- Identify the radiographic error
- Determine the cause of elongation
- Apply corrective measures
- Recommend appropriate technique
- Support safe and accurate radiographic practice
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Key Learning Points
- Elongation is caused by insufficient vertical angulation of the X-ray beam
- The correction is to increase vertical angulation appropriately
- The paralleling technique reduces the risk of elongation errors
- Elongation is more common with the bisecting-angle technique
- Elongated images reduce diagnostic accuracy, especially for root length assessment