Non-healing sinus is a common clinical feature is chronic osteomyelitis. The most common frequent cause for this presentation is:
(C)- Due to necrosis pieces of dead bone separate as sequestra varying in size from spicule to large segment. It is lighter than live bone and normal pattern of bone is lost. It acts as nidus and is most common cause of non healing sinus in chronic osteomyelitis.
Resistant organisms
Retained foreign body
Presence of sequestrum
Intraosseous cavities
Osteomyelitis