title: Odontogenic infection pathway to the submandibular space: imaging assessment.
abstract: The aims of this study were to determine the pathways of odontogenic infection spread into the submandibular space and their relationship to the clinical symptoms. Computerized tomography (CT) and magnetic resonance (MR) images of 33 patients with submandibular involvement were analyzed. The spread of infection was evaluated by lateral asymmetry of the shape and density of the fascial spaces and tissues, and by obliteration of the interfascial fat spaces. Imaging findings were classified into three types: in 19 patients (57.6%), infection spread through the mylohyoid muscle or sublingual space (type I). In five patients (15.2%), infection spread through the bony structures of the mandible with periosteal reaction or perforation of the cortical plate (type II) and was associated with relatively mild symptoms. In four patients (12.1%), infection spread from the masticatory space (type III). Seven of 11 patients with dysphagia or fever showed submandibular involvement spreading into the parapharyngeal space. CT and MR imaging clearly demonstrated different pathways of the spread of odontogenic infection into the submandibular space, which influenced the manifestation of clinical symptoms.
authors.affiliation: Department of Oral and Maxillofacial Radiology, Aichi-Gakuin University School of Dentistry, Nagoya, Japan. yoshiko@dpc.aichi-gakuin.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Ariji
authors.forename: M
authors.initials: M
authors.lastname: Gotoh
authors.forename: Y
authors.initials: Y
authors.lastname: Kimura
authors.forename: M
authors.initials: M
authors.lastname: Naitoh
authors.forename: K
authors.initials: K
authors.lastname: Kurita
authors.forename: N
authors.initials: N
authors.lastname: Natsume
authors.forename: E
authors.initials: E
authors.lastname: Ariji
mesh_terms: D000273:Adipose Tissue / Q000000981:diagnostic imaging / Q000473:pathology; D003680:Deglutition Disorders / Q000209:etiology; D005205:Fascia / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D005491:Focal Infection, Dental / Q000145:classification* / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008336:Mandibular Diseases / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D008406:Masseter Muscle / Q000000981:diagnostic imaging / Q000473:pathology; D009060:Mouth Floor / Q000000981:diagnostic imaging / Q000473:pathology; D009333:Neck / Q000000981:diagnostic imaging / Q000473:pathology*; D009334:Neck Muscles / Q000000981:diagnostic imaging / Q000473:pathology*; D010522:Periostitis / Q000000981:diagnostic imaging / Q000473:pathology; D010614:Pharynx / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014313:Trismus / Q000209:etiology