title: Assessing stomatognathic performance after mandibulectomy according to the method of mandibular reconstruction.
abstract: The aim of this study was to investigate stomatognathic performance after mandibulectomy. Twenty-six subjects were classified into two groups: the mandibular continuity (MC) group were reconstructed and kept in MC, while the mandibular non-continuity (MNC) group lost MC. Stomatognathic performance was evaluated using the Oral Health Impact Profile in Japanese (OHIP-J), a colour-changing chewing gum, a gummy jelly, Sato's questionnaire, electromyography (EMG) of the masticatory muscles, and mandibular movement. The OHIP-J and modified Sato's questionnaire revealed that the physical and eating disability of the MNC group was significantly more severe than that of the MC group (P<0.05). The mean EMG activity of the anterior temporalis muscle in the relaxed state was significantly higher in the MNC group than in the MC group (P<0.05). The mean masticating/relaxing ratio of EMG activities for the masseter muscle was lower in the MNC group than in the MC group (P<0.05). The maximum mouth opening range of the MNC group was greater than that of the MC group (P<0.05). Accordingly, the MC group had good results for physical and eating ability. The MNC group suffered from muscle fatigue but had the advantage of a greater maximum mouth opening range.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Ishida
authors.affiliation: Department of Oral and Maxillofacial Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan. Electronic address: shibuya@med.nagoya-cu.ac.jp.
authors.forename: Y
authors.initials: Y
authors.lastname: Shibuya
authors.affiliation: Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kobayashi
authors.affiliation: Department of Oral and Maxillofacial Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Komori
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000502:physiology* / Q000601:surgery; D008339:Mandibular Neoplasms / Q000601:surgery*; D063175:Mandibular Reconstruction / Q000379:methods*; D008409:Mastication / Q000502:physiology*; D008410:Masticatory Muscles / Q000502:physiology*; D008875:Middle Aged; D018763:Muscle Fatigue / Q000502:physiology; D009909:Oral Health; D018434:Sickness Impact Profile; D013524:Surgical Flaps; D011795:Surveys and Questionnaires
keywords: mandibular movement; mandibular reconstruction; mandibulectomy; masticatory muscles; masticatory performance; stomatognathic performance