title: Effects of bilateral lingual and inferior alveolar nerve anesthesia effects on masticatory function and early swallowing.
abstract: OBJECTIVE
  To determine whether bilateral lingual and inferior alveolar nerve anesthesia affects the onset of swallowing including masticatory function.
  
  
  METHODS
  Twenty young male volunteers were asked to chew and swallow corned beef and then a mixture of corned beef and liquid in their usual manner before and after local anesthesia. The oral and pharyngeal swallowing was investigated using videofluoroscopic examination in a lateral plane. Eight objective indicators including oral containment time, swallowing threshold, and pharynx-to-swallow interval were measured.
  
  
  RESULTS
  Oral containment time and total sequence duration, total number of chews, and total number of swallows for the 2 test foods varied significantly between those before and after anesthesia. Individual pharynx-to-swallow intervals varied with both foods without remarkable increases or decreases in the swallow duration and cricopharyngeal opening time.
  
  
  CONCLUSIONS
  Bilateral lingual and inferior alveolar nerve anesthesia may affect early swallowing; changes in the onset of swallowing varied among the participants.
authors.affiliation: Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan. teki@den.hokudai.ac.jp
authors.forename: Kanchu
authors.initials: K
authors.lastname: Tei
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yamazaki
authors.forename: Masaaki
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Yuri
authors.initials: Y
authors.lastname: Izumiyama
authors.forename: Mitunobu
authors.initials: M
authors.lastname: Ono
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Totsuka
mesh_terms: D000328:Adult; D000779:Anesthetics, Local / Q000008:administration & dosage*; D003679:Deglutition / Q000187:drug effects*; D005471:Fluoroscopy; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008012:Lidocaine / Q000008:administration & dosage*; D008036:Lingual Nerve / Q000187:drug effects*; D008297:Male; D008340:Mandibular Nerve / Q000187:drug effects*; D008409:Mastication / Q000187:drug effects*; D009055:Mouth / Q000187:drug effects; D010614:Pharynx / Q000187:drug effects; D012684:Sensory Thresholds / Q000187:drug effects; D013997:Time Factors; D014743:Videotape Recording
chemical_list: D000779:Anesthetics, Local; D008012:Lidocaine