Common complication seen in a patient of osteopetrosis during extraction is:: (A) Jaw fracture, (B) Osteomyelitis, (C) Both of the above, (D) None
Answer is C. Medullary spaces of jaws are remarkably reduced in both forms.
Osteomyelitis and jaw fracture is common during tooth extraction.

Key concept:
Osteomyelitis of the mandible is common due to a deficient blood supply. Bones are fragile and can fracture easily. 
Ref: Shafer's textbook of oral pathology 7th edition page 704