title: Bite Force and Masticatory Performance Using Implant-supported Overdentures After Treatment of Mandibular Cancer.
abstract: OBJECTIVE
  To evaluate overdentures with regard to artificial restoration of oral function following mandibular cancer.
  
  
  METHODS
  We examined 32 patients who had undergone mandibular bone resection as treatment for malignancy and were using implant-supported overdentures. The patients were aged 55-87 years (mean=68.6) with a male to female ratio of 23:9. Marginal resection was performed in 29 patients and segmentectomy in 3.
  
  
  RESULTS
  Before and after using the attachment for overdenture, oral function differed significantly. After the setting of implant-retained overdentures, maximum bite force increased on average by 362% (average, from 16.2 N to 58.8 N; p<0.01). Xylitol gum examination showed a 363% increase in masticatory performance (average, 3.1 to 8.0 points; p<0.01).
  
  
  CONCLUSIONS
  Implant-retained overdenture resulted in improved oral function, that was lost after treatment for mandibular cancer.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Graduate School of Dental Science, Kyushu University, Fukuoka, Japan tomoki@dent.kyushu-u.ac.jp.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Sumida
authors.affiliation: Department of Oral and Maxillofacial Surgery, Graduate School of Dental Science, Kyushu University, Fukuoka, Japan.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Kobayashi
authors.affiliation: Department of Oral and Maxillofacial Surgery, Ehime University Graduate School of Medicine, Toon, Japan.
authors.forename: Akiko
authors.initials: A
authors.lastname: Ishikawa
authors.affiliation: Department of Oral and Maxillofacial Surgery, Ehime University Graduate School of Medicine, Toon, Japan.
authors.forename: Kozue
authors.initials: K
authors.lastname: Shinohara
authors.affiliation: Department of Oral and Maxillofacial Surgery, Ehime University Graduate School of Medicine, Toon, Japan.
authors.forename: Emi
authors.initials: E
authors.lastname: Matsumoto
authors.affiliation: Ehime Implant Clinic, Masaki, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kamakura
authors.affiliation: Department of Oral and Maxillofacial Surgery, Graduate School of Dental Science, Kyushu University, Fukuoka, Japan.
authors.forename: Yoshihide
authors.initials: Y
authors.lastname: Mori
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001732:Bite Force; D015921:Dental Implants; D003828:Denture, Overlay; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000503:physiopathology* / Q000601:surgery; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000503:physiopathology / Q000601:surgery / Q000628:therapy*; D017060:Patient Satisfaction; D011788:Quality of Life
chemical_list: D015921:Dental Implants
keywords: Overdenture; bite force; dental implant; edentulous; masticatory performance; oral cancer