cellulitis In relation to the lower jaw Submental space Submandibular space Sublingual space Buccal space Submassetric interval parotid compartment Pterygomandibular space lateral pharyngeal space peritonsilas fossa In relation to the upper jaw Within the lip Within the canine fossa Palatal subperiosteal interval Maxillary antrum Infratemporal fossa space Subtemporalis muscle interval Submental space infection Surgical anatomy Signs and symptoms Treatment Signs and symptoms Treatment Sublingual space infections Surgical anatomy Signs and symptoms Treatment Ludwig's angina Aetiology Signs and symptoms Treatment Abscess formation in relation to the buccinator muscle Surgical anatomy Signs and symptoms Treatment The buccal space Surgical anatomy Signs and symptoms Treatment The submasseteric abscess Surgical anatomy Signs and symptoms Radiological examination Differential diagnosis The swelling affecting 4 anatomical compartments have to be distinguished: *The masseteric compartment Masseteric hypertrophy Intramuscular haemangioma Thrombophlebitis of an intramuscular haemangioma *The buccal space Infection Haematoma Haemangioma Lipoma *The parotid compartment Obstruction of the parotid duct Suppurative infection of the gland Infection parotid lymph nodes Mumps Cytomegalovirus Sjogren's syndrome Neoplasm *The ramus of the mandible: cystic or neoplastic enlargement. Treatment Hilton's method Pterygomandibular space infection Surgical anatomy Aetiology Contaminated needle used for an inferior alveolar nerve block injection. Spread of infection from the lower 3rd molar region. Infection originated from the upper 3rd molar. Follows a posterior superior alveolar nerve block injection. Signs and symptoms Treatment Lateral pharyngeal (parapharyngeal) space infection Surgical anatomy Aetiology The space may become infected from an abscess extending backwards from the lower 3rd molar area or more commonly one passing laterally from a tonsillar abscess. Infection can also spread backwards into it from a sublingual or submandibular space. A rare case infection is the surgical displacement of a lower 3rd molar or the root of the lower 3rd molar distally at the lingual flap and backwards to the lateral pharyngeal space. Signs and symptoms Treatment Peritonsillar abscess or Quinsy Surgical anatomy Signs and symptoms Treatment