osteitis osteitis osteitis is inflammation of bone. more specifically, it can refer to one of the following conditions: osteomyelitis, or infectious osteitis, mainly bacterial osteitis alveolar osteitis or "dry socket" condensing osteitis (or osteitis condensans) osteitis deformans (or paget's disease of bone) osteitis fibrosa cystica (or osteitis fibrosa, or von recklinghausen's disease of bone) osteitis pubis radiation osteitis osteitis condensans ilii panosteitis, a long bone condition in large breed dogs in horses, pedal osteitis is frequently confused with laminitis. osteitisspecialtyrheumatology