Endodontics · single question
After trauma, teeth #8 and #9 gradually turn yellow and the canals appear narrowed radiographically. The most likely cause is:
Show answer and explanation
Correct answer: A. Pulp canal calcification (calcific metamorphosis)
- A. Correct. Calcific metamorphosis (pulp canal calcification) follows trauma — accelerated dentin deposition narrows/obliterates the canal and gives the crown a yellow, opaque appearance.
- B. Internal resorption produces a 'pink tooth' and a ballooning canal radiolucency, not yellowing/narrowing.
- C. External cervical resorption shows a cervical radiolucency, not diffuse yellowing.
- D. Ankylosis presents with a high-pitched percussion note and lack of mobility, not color change.