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
For intrusive luxation injuries, ﬁxation period is about: 
Select and explain. 
A. 2 weeks only, B. 4 weeks, C. 4 weeks with semi rigid and 2 week with rigid, D. 6 to 8 weeks
B: 4 weeks
Answer: B: 4 weeks 
Explanation: Intrusion

Most severe form of luxation injuries.
Displacement is seen.
TOP is positive.
Mobility is not seen. 
High pitched metallic sound on percussion is heard. 
Splinting should be done for 4 weeks.