title: Development of soft denture lining materials containing fluorinated monomers.
abstract: OBJECTIVE
  To develop a new fluorine-containing soft denture lining material, the influences of fluorinated monomers on physical properties and contamination resistance were examined.
  
  
  METHODS
  Five experimental materials of different chemical compositions in fluorinated monomer and two plasticized acrylics (Supersoft, VertexSoft) were used to evaluate water sorption, solubility, staining resistance, Shore A hardness, and contact angle. Five specimens for each test were fabricated. The results were analyzed with one-way analysis of variance (ANOVA) and Tukey's HSD test using statistical software at p=0.05.
  
  
  RESULTS
  The amount of water sorption tended to decrease as the number of the fluorine atoms in fluorinated monomers increased. Similar solubility was shown regardless of the type of fluorinated monomer. The use of fluorinated monomers for immersion in coffee allowed suppression of discoloration. In beta -carotene, there were no significant differences in color changes among four experimental materials with fluorinated monomer. Shore A hardness was decreased and the contact angles tended to increase as the number of fluorine atoms in fluorinated monomers increased. When comparing the experimental materials and commercially available materials, the experimental materials containing fluorinated monomers with large numbers of fluorine atoms showed adequate clinical properties except for staining test of beta -carotene.
  
  
  CONCLUSIONS
  Monomers with a large number of fluorine atoms can be used to develop applicable soft denture lining materials in clinical practice.
authors.affiliation: Department of Complete Denture Prosthodontics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. y.kasuga.ore@tmd.ac.jp
authors.forename: Yuta
authors.initials: Y
authors.lastname: Kasuga
authors.forename: Norihisa
authors.initials: N
authors.lastname: Akiba
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Minakuchi
authors.forename: Tatsuro
authors.initials: T
authors.lastname: Uchida
authors.forename: Nariko
authors.initials: N
authors.lastname: Matsushita
authors.forename: Munemitsu
authors.initials: M
authors.lastname: Hishimoto
authors.forename: Iwao
authors.initials: I
authors.lastname: Hayakawa
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004396:Coloring Agents; D003822:Denture Liners; D017611:Fluorine Compounds; D006244:Hardness; D008422:Materials Testing; D008689:Methacrylates; D009910:Oral Hygiene; D012995:Solubility; D017155:Wettability
chemical_list: D004396:Coloring Agents; D017611:Fluorine Compounds; D008689:Methacrylates