title: In Vitro Wear Resistance of Nano-Hybrid Composite Denture Teeth.
abstract: OBJECTIVE
  To evaluate the wear resistance of nano-hybrid composite denture teeth as compared to two commonly used denture teeth: interpenetrating polymer network (IPN) and double crosslinking polymethylmethacrylate (PMMA) denture teeth.
  
  
  METHODS
  18 styli and 18 disk specimens were prepared from the three denture tooth materials: nano-hybrid composite, IPN, and double crosslinking PMMA. The specimens were mounted in a two-body wear testing machine to simulate chewing in the complete denture. The amount of wear from the styli specimens were measured before and after using a digital micrometer, and the depth of the wear track from the disk specimens was measured using a noncontact 3D optical profilometer. The total wear from each denture tooth group was compared using one-way ANOVA with a 0.05 significance level. A Tukey post hoc test was used to determine differences between the three groups.
  
  
  RESULTS
  The mean total wear in the nano-hybrid composite teeth group was 1.16 mm, SD = 0.5 mm, statistically significantly higher (p ≤ 0.0001) than the IPN (mean = 0.13 mm, SD = 0.05) and double crosslinking PMMA tooth groups (mean = 0.31 mm, SD = 0.19). There was no statistically significant difference between IPN denture teeth and double crosslinking PMMA denture teeth in the amount of wear.
  
  
  CONCLUSIONS
  Nano-hybrid composite denture teeth exhibited statistically significantly more wear than the IPN and double crosslinking PMMA denture teeth.
authors.affiliation: Department of Oral and Maxillofacial Rehabilitation, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.|Prosthodontics postgraduate program, Rutgers University School of Dental Medicine, Newark, NJ.
authors.forename: Nabeel
authors.initials: N
authors.lastname: Munshi
authors.affiliation: Department of Restorative Dentistry, Director of the General Dentistry Division, Rutgers University School of Dental Medicine, Newark, NJ.
authors.forename: Marc
authors.initials: M
authors.lastname: Rosenblum
authors.affiliation: Institutional Assessment and Quality Improvement, Rutgers University School of Dental Medicine, Newark, NJ.
authors.forename: Shuying
authors.initials: S
authors.lastname: Jiang
authors.affiliation: Department of Restorative Dentistry, Rutgers University School of Dental Medicine, Newark, NJ.
authors.forename: Robert
authors.initials: R
authors.lastname: Flinton
mesh_terms: D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D019554:Dental Restoration Wear; D003824:Denture, Complete; D066298:In Vitro Techniques; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D013499:Surface Properties; D014093:Tooth, Artificial
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D011108:Polymers; D019904:Polymethyl Methacrylate
keywords: Acrylic denture tooth wear; Bluline; Phonares; Portrait