title: The influence of verification jig on framework fit for nonsegmented fixed implant-supported complete denture.
abstract: OBJECTIVE
  The purpose of this retrospective study was to assess if there was a difference in the likelihood of achieving passive fit when an implant-supported full-arch prosthesis framework is fabricated with or without the aid of a verification jig.
  
  
  METHODS
  This investigation was approved by the University of Rochester Research Subject Review Board (protocol #RSRB00038482). Thirty edentulous patients, 49 to 73 years old (mean 61 years old), rehabilitated with a nonsegmented fixed implant-supported complete denture were included in the study. During the restorative process, final impressions were made using the pickup impression technique and elastomeric impression materials. For 16 patients, a verification jig was made (group J), while for the remaining 14 patients, a verification jig was not used (group NJ) and the framework was fabricated directly on the master cast. During the framework try-in appointment, the fit was assessed by clinical (Sheffield test) and radiographic inspection and recorded as passive or nonpassive.
  
  
  RESULTS
  When a verification jig was used (group J, n = 16), all frameworks exhibited clinically passive fit, while when a verification jig was not used (group NJ, n = 14), only two frameworks fit. This difference was statistically significant (p < .001).
  
  
  CONCLUSIONS
  Within the limitations of this retrospective study, the fabrication of a verification jig ensured clinically passive fit of metal frameworks in nonsegmented fixed implant-supported complete denture.
authors.affiliation: Division of Prosthodontics, Eastman Institute for Oral Health, School of Medicine and Dentistry, University of Rochester, Rochester, NY 14620, USA. carlo_ercoli@urmc.rochester.edu
authors.forename: Carlo
authors.initials: C
authors.lastname: Ercoli
authors.forename: Alessandro
authors.initials: A
authors.lastname: Geminiani
authors.forename: Changyong
authors.initials: C
authors.lastname: Feng
authors.forename: Heeje
authors.initials: H
authors.lastname: Lee
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000368:Aged; D000497:Alloys; D017076:Computer-Aided Design; D003722:Dental Alloys / Q000737:chemistry; D003734:Dental Casting Investment / Q000737:chemistry; D059605:Dental Implant-Abutment Design; D015921:Dental Implants; D003760:Dental Impression Materials / Q000737:chemistry; D003761:Dental Impression Technique / Q000295:instrumentation; D018772:Dental Marginal Adaptation; D003764:Dental Materials / Q000737:chemistry; D019094:Dental Prosthesis, Implant-Supported; D003779:Denture Design / Q000295:instrumentation*; D003824:Denture, Complete; D020724:Elastomers / Q000737:chemistry; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation; D008875:Middle Aged; D011145:Polyvinyls / Q000737:chemistry; D012189:Retrospective Studies; D012833:Siloxanes / Q000737:chemistry; D014025:Titanium / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D000497:Alloys; D003722:Dental Alloys; D003734:Dental Casting Investment; D015921:Dental Implants; D003760:Dental Impression Materials; D003764:Dental Materials; D020724:Elastomers; C495447:Permadyne; D011145:Polyvinyls; D012833:Siloxanes; C034183:vinyl polysiloxane; C031462:titanium alloy (TiAl6V4); D014025:Titanium