Endodontics · single question
Radiograph shows root resorption from the EXTERNAL surface. What is the diagnosis and responsible cells?
Show answer and explanation
Correct answer: D. External root resorption by odontoclasts/osteoclasts
EXTERNAL root resorption begins at external root surface, progresses inward. Caused by ODONTOCLASTS/OSTEOCLASTS resorbing cementum and dentin from outside. Radiographically: irregular external root surface loss vs. internal resorption (round canal expansion from within).