This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
In a tooth, which has been endodontically treated, there
is pain on percussion and slight mobility due to: 
Select and explain. 
A. Loose crown, B. Tooth fracture, C. Psychosomatic, D. Eccentric contact
D: Eccentric contact
Answer: D: Eccentric contact 
Explanation: None