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
Endodontic implants refers to those 
Select and explain. 
A. Used to obturate the canal, B. used to stabilize periodontally weakened with poor crown root ratio, C. Placed between periosteum and cortex of bone, D. Which are embedded within the bon
B: used to stabilize periodontally weakened with poor crown root ratio
Answer: B: used to stabilize periodontally weakened with poor crown root ratio 
Explanation: None