tailieunhanh - Ebook A concise textbook of oral and maxillofacial surgery: Part 2

Part 2 book “A concise textbook of oral and maxillofacial surgery” has contents: Inflammatory disease of jaw bone, surgical procedures in prosthodontics–preprosthetic surgery, surgical procedures in endodontics–endodontic surgery, maxillary sinus and its disorders, temporomandibular joint disorders, and other contents. | Inflammatory Disease of Jaw Bone OSTEOMYELITIS OF JAW 10 Etiology Definition It is a diffuse inflammation of the soft tissue and bone involving the cancellous bone marrow and the periosteal component. Osteomyelitis can also be defined as an inflammation of the medullary portion of the bone. Osteomyelitis can be explained as an inflammatory condition of bone that begins as an infection of the medullary cavity and haversian systems and extends to involve the periosteum of the affected area. i. Contigenous spread of odontogenic infection Classification Suppurative Osteomyelitis Non-suppurative Osteomyelitis i. Acute suppurative osteomyelitis ii. Chronic suppurative osteomyelitis • Primary • Secondary iii. Infantile osteomyelitis i. Chronic sclerosing osteomyelitis ii. Focal sclerosing osteomyelitis iii. Diffuse sclerosing osteomyelitis iv. Garre's sclerosing osteomyelitis v. Actinomycotic osteomyelitis vi. Radiation osteromyelitis and necrosis ii. Trauma and injury leading to compound fracture of teeth. 138 A Concise Textbook of Oral and Maxillofacial Surgery iii. 2. iv. Laceration and infections of the lymph node leading to osteomyelitis via hematogenous spread. Osteomyelitis is more commonly seen in patients with reduced host resistance, altered jaw vascularity or those suffering from systemic diseases. Pathogenesis Osteomyelitis is initiated from a contiguous focus of infection or by hematogenous spread. Any condition leading to the avascularity of the medullary portion of the bone can lead to the occurrence of osteomyelitis in that particular bone. Among the jaws, osteomyelitis is mostly seen in the mandible as-• Maxilla is more porous and richly supplied by blood vessels. • Maxilla has thin cortical plates and paucity of medullary tissues due to which any maxillary infection remains confined within the bone and the edema and pus dissipates into the soft tissues and sinuses. There are two sequelaes which have been proposed