title: A double blind randomized clinical trial comparing lingualized and fully bilateral balanced posterior occlusion for conventional complete dentures.
abstract: OBJECTIVE
  A lingualized occlusion (LO) for complete dentures reduces lateral inferences and occlusal force contacts and direction; thus, LO is theorized to be more suitable for patients with compromised ridges than fully bilateral balanced articulation (FBBA). However, no studies have yet provided evidence to support LO in edentate patients with compromised alveolar ridges. The purpose of this study was to compare LO and FBBA in edentulous individuals with compromised ridges.
  
  
  METHODS
  Sixty edentulous individuals were randomly allocated into groups and received dentures with either LO or FBBA. Following delivery, several denture-related satisfaction variables were measured using 100mm visual analogue scales; oral health-related quality of life (OHRQoL) was also assessed using the Oral Health Impact Profile (OHIP). Sub-group analyses of the effect of moderate and severe mandibular bone loss were also carried out.
  
  
  RESULTS
  No significant differences were detected between LO and FBBA with the primary outcome. At 6 months, participants with severely atrophied mandibles and FBBA rated their satisfaction with retention of mandibular dentures significantly lower than those with LO (median LO: 86, FBBA: 58.5, p=0.03). They also had significantly lower OHRQoL for the domain of Pain (median LO: 4, FBBA: 5, p=0.02). General satisfaction and total OHIP scores significantly improved between baseline and 6 months only for the LO subjects with severely atrophied mandibles (satisfaction: p=0.003, OHIP total score: p=0.0007).
  
  
  CONCLUSIONS
  The results indicate that the LO occlusal scheme with hard resin artificial teeth is more efficient for patients with severely resorbed mandibular ridges.
authors.affiliation: Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan. Electronic address: kawai.yasuhiko@nihon-u.ac.jp.
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Kawai
authors.affiliation: Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Ikeguchi
authors.affiliation: Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
authors.forename: Asako
authors.initials: A
authors.lastname: Suzuki
authors.affiliation: Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
authors.forename: Azusa
authors.initials: A
authors.lastname: Kuwashima
authors.affiliation: Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
authors.forename: Ryuji
authors.initials: R
authors.lastname: Sakamoto
authors.affiliation: Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Matsumaru
authors.affiliation: Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
authors.forename: Suguru
authors.initials: S
authors.lastname: Kimoto
authors.affiliation: Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.
authors.forename: Morio
authors.initials: M
authors.lastname: Iijima
authors.affiliation: Oral Health and Society Research Unit, McGill University Faculty of Dentistry, Montreal, Canada.
authors.forename: Jocelyne Sylvia
authors.initials: JS
authors.lastname: Feine
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000539:Alveolar Process / Q000473:pathology; D001732:Bite Force; D003766:Dental Occlusion; D003767:Dental Occlusion, Balanced; D003824:Denture, Complete / Q000523:psychology*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009066:Mouth, Edentulous / Q000523:psychology*; D009909:Oral Health; D017060:Patient Satisfaction; D011787:Quality of Health Care; D012117:Resins, Synthetic; D014093:Tooth, Artificial
chemical_list: D012117:Resins, Synthetic
keywords: Artificial tooth; Complete denture; Dental occlusion; Patient report outcomes; Randomized clinical trial