title: Survival analysis of mandibular complete dentures with acrylic-based resilient liners.
abstract: OBJECTIVE
  The purpose of this long-term randomised controlled trial was to compare the longevity of dentures constructed using a conventional acrylic resin (CAR) to that of dentures constructed using an acrylic-based resilient liner (ARL).
  
  
  METHODS
  The follow-up study was essentially carried out by annual telephone calls to each of the 67 participants. The Kaplan-Meier method and life-table analysis were used for univariate analyses. The Cox proportional-hazards test was used as a final model for statistically adjusting predictor variables such as sex, clinician type, mandibular denture type and age at denture delivery.
  
  
  RESULTS
  The denture type was likely to affect the survival time of the dentures, while the sex and clinician type were not. The group using acrylic-based resilient denture liners had twice the risk of having shorter denture-survival times than those using conventional acrylic resin dentures. Younger participants were likely to have a reduced risk of having shorter denture-survival times than older participants.
  
  
  CONCLUSIONS
  We conclude that mandibular complete dentures constructed using ARL are twice as likely as dentures constructed using CAR to have shorter denture survival times, mainly because of material deterioration.
authors.affiliation: Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Japan.
authors.forename: Suguru
authors.initials: S
authors.lastname: Kimoto
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Kimoto
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Murakami
authors.forename: Atsuko
authors.initials: A
authors.lastname: Gunji
authors.forename: Nana
authors.initials: N
authors.lastname: Ito
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Kawai
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003764:Dental Materials / Q000737:chemistry*; D019232:Dental Restoration Failure / Q000706:statistics & numerical data; D003779:Denture Design / Q000706:statistics & numerical data; D003822:Denture Liners / Q000706:statistics & numerical data*; D003826:Denture, Complete, Lower / Q000706:statistics & numerical data*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015993:Life Tables; D008137:Longitudinal Studies; D008297:Male; D016016:Proportional Hazards Models; D012737:Sex Factors; D016019:Survival Analysis
chemical_list: D000180:Acrylic Resins; D003764:Dental Materials