The buccal space lies between buccinator muscle and overlying skin and superficial fascia. This potential space may become involved via infection of maxillary or mandibular molars (arrows). (Modified from Flint PW, Haughey BH, Lund VJ, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 5th ed. Philadelphia: Elsevier; 2010.)