title: Fit accuracy of metal partial removable dental prosthesis frameworks fabricated by traditional or light curing modeling material technique: An in vitro study.
abstract: OBJECTIVE
  The aim of this study was to compare the fit accuracies of metal partial removable dental prosthesis (PRDP) frameworks fabricated by the traditional technique (TT) or the light-curing modeling material technique (LCMT).
  
  
  METHODS
  A metal model of a Kennedy class III modification 1 mandibular dental arch with two edentulous spaces of different spans, short and long, was used for the study. Thirty identical working casts were used to produce 15 PRDP frameworks each by TT and by LCMT. Every framework was transferred to a metal master cast to measure the gap between the metal base of the framework and the crest of the alveolar ridge of the cast. Gaps were measured at three points on each side by a USB digital intraoral camera at ×16.5 magnification. Images were transferred to a graphics editing program. A single examiner performed all measurements. The two-tailed t-test was performed at the 5% significance level.
  
  
  RESULTS
  The mean gap value was significantly smaller in the LCMT group compared to the TT group. The mean value of the short edentulous span was significantly smaller than that of the long edentulous span in the LCMT group, whereas the opposite result was obtained in the TT group.
  
  
  CONCLUSIONS
  Within the limitations of this study, it can be concluded that the fit of the LCMT-fabricated frameworks was better than the fit of the TT-fabricated frameworks. The framework fit can differ according to the span of the edentate ridge and the fabrication technique for the metal framework.
authors.affiliation: Department of Removable Prosthodontics, Faculty of Dentistry, Damascus University, Damascus, Syria.
authors.forename: Mohammad Tarek M
authors.initials: MT
authors.lastname: Anan
authors.affiliation: Department of Removable Prosthodontics, Faculty of Dentistry, Damascus University, Damascus, Syria.
authors.forename: Mohannad H
authors.initials: MH
authors.lastname: Al-Saadi
keywords: Accuracy; Chrome cast framework; Cobalt–chromium; Gap measurement; Light curing modeling material technique; Partial denture fit