This document discusses odontogenic infections, including factors that determine the extent of infection, the natural history of dental infections, anatomical pathways of infection spread, clinical features, and principles of managing simple dental infections. It notes that factors determining infection extent include the microbe, host health status, and local anatomy and blood supply. The natural history involves progression from pulpitis and apical periodontitis to potential complications like facial cellulitis, abscesses, or spread to deep spaces. Management principles are to drain infections locally, maintain drainage, and eliminate the cause by extracting teeth or doing root canals, while using systemic bed rest, fluids, analgesics, and antibiotics.