Why are these additional injuries inconsistent with a…
Paediatric dentistry questions combine clinical management with age-appropriate considerations — LA dosing by weight, behaviour management. This exam-level vignette tests your ability to work through clinical details and arrive at the correct management.
A 6-year-old presents with loose upper primary incisors and facial abrasions reportedly from a skateboard fall. You notice faint parallel lines of petechial bruising across the left side of his neck and bruising on both inner and outer surfaces of the right ear. Why are these additional injuries inconsistent with a skateboard fall?
- A. Skateboard falls always cause lower limb injuries only
- B. The neck and ear lie in a "triangle of safety" protected by the shoulder and skull — they are rarely injured in accidental falls. Parallel petechial lines suggest a slap mark, and bilateral ear bruising suggests pinching or pulling
- C. The injuries are consistent with a skateboard fall — children are clumsy
- D. Petechial bruising only occurs in bleeding disorders
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The neck is protected by the shoulder and the parietal skull region, forming a "triangle of safety" that makes accidental injury to this area unlikely. Parallel petechial lines are characteristic of a slap — blood is forced from capillaries between the fingers. Bruising on both inner and outer surfaces of the ear (pinna) is consistent with pinching or pulling, not a fall. These patterns, combined with the vague history, delayed presentation, and the child's withdrawn behaviour, should raise serious concern about non-accidental injury.
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