title: Clinical anatomy of regional analgesia: an approach to failure.
authors.forename: P A
authors.initials: PA
authors.lastname: Heasman
authors.forename: A D
authors.initials: AD
authors.lastname: Beynon
mesh_terms: D000766:Anesthesia, Dental / Q000379:methods*; D000772:Anesthesia, Local / Q000379:methods*; D006801:Humans; D007568:Jaw / Q000033:anatomy & histology* / Q000294:innervation; D008340:Mandibular Nerve / Q000033:anatomy & histology; D008442:Maxillary Nerve / Q000033:anatomy & histology; D009407:Nerve Block; D013997:Time Factors