title: The Retread: A Definition and Retrospective Analysis of 205 Implant-Supported Fixed Prostheses.
abstract: OBJECTIVE
  Acrylic resin teeth on fixed implant prostheses are subject to time-dependent wear. The purpose of this retrospective analysis is to evaluate and describe the management of such wear in the context of selected variables--patient gender and age, dental arch location, and opposing dentition. The clinical and dental laboratory process to replace the worn teeth is defined as a retread.
  
  
  METHODS
  A retrospective database review from a single private prosthodontic practice was carried out on all patients who had undergone a retread procedure. The patient pool included 205 arches in 194 patients (70 in men, 135 in women) with a mean age of 57.4 years (range: 19.9 to 80.5 years). The retread procedure is described.
  
  
  RESULTS
  The mean time between final prosthesis delivery and retread was 7.8 years (range: 1.1 to 22.9 years). Statistical analysis was significant according to dental arch and opposing dentition. A statistical difference was also noted in patients undergoing multiple retread procedures, with a reduction in time between the subsequent procedures.
  
  
  CONCLUSIONS
  Acrylic resin components of implant-supported hybrid prostheses wear over time and are influenced by a combination of the nature of the opposing dentition and patient habits. The dental laboratory process to retread the implant-supported framework is important for long-term patient care and maintenance of an appropriate vertical dimension of occlusion.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Balshi
authors.forename: Glenn J
authors.initials: GJ
authors.lastname: Wolfinger
authors.forename: Stephen G
authors.initials: SG
authors.lastname: Alfano
authors.forename: Stephen F
authors.initials: SF
authors.lastname: Balshi
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003724:Dental Arch / Q000473:pathology; D003764:Dental Materials / Q000737:chemistry; D019094:Dental Prosthesis, Implant-Supported / Q000706:statistics & numerical data*; D019554:Dental Restoration Wear / Q000706:statistics & numerical data*; D003817:Dentition; D003780:Denture Repair / Q000706:statistics & numerical data*; D003824:Denture, Complete; D003830:Denture, Partial, Fixed; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007574:Jaw Relation Record; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012737:Sex Factors; D013997:Time Factors; D014093:Tooth, Artificial / Q000706:statistics & numerical data; D014716:Vertical Dimension; D055815:Young Adult
chemical_list: D000180:Acrylic Resins; D003764:Dental Materials