A. Exposure to cold
B. Tooth extraction
C. Local and systemic infection
D. Any of the above
Correct Answer: Any of the above ✔
Last Updated: February 07, 2020
A. Exposure to cold
B. Tooth extraction
C. Local and systemic infection
D. Any of the above
Correct Answer: Any of the above ✔
Last Updated: February 07, 2020