A clinical investigation of the fit of removable partial dental prosthesis clasp assemblies

The Journal of Prosthetic Dentistry
Daniel DunhamStephen M Cameron

Abstract

Removable partial denture frameworks are complex castings fabricated from high-shrinkage alloys. This may result in difficulty in achieving accurate fit. The purpose of this study was to evaluate which component(s) of the clasp assembly contact the abutment tooth clinically. New and existing frameworks with at least 1 conventional prepared occlusal rest were evaluated for fit. The spacing between the bottom of each of the rests of the 50 clasp assemblies and the corresponding rest seat were recorded with vinyl polysiloxane. The fit of each rest was determined with the use of a dial caliper by measuring, in micrometers, the thickness of the record between the rest and the bottom of the rest seat. The Kennedy classification was also recorded. A 2-sample t test was used to evaluate the difference in fit between tooth-tissue supported and tooth-supported designs (alpha=.05). The average space between the rest and prepared rest seat was 193 +/- 203 microm, with a range of 0 to 828 mum. Twenty tooth-tissue frameworks had an average space of 136 +/- 160 microm and 30 tooth-supported frameworks had an average space of 230 +/- 222 microm. The 2-sample t test showed no significant difference for fit between tooth-tissue supported and too...Continue Reading

Citations

Jul 5, 2011·The Journal of Prosthetic Dentistry·Deo K PunDavid Berzins
Dec 25, 2008·The Journal of Prosthetic Dentistry·Daniel M Domagala, Michael P Waliszewski
Jan 22, 2008·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Hidemasa Shimpo
May 12, 2010·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Veena GowriSatyabodh S Guttal
Apr 9, 2017·The Journal of Prosthetic Dentistry·Jong-Won LeeSeong-Kyun Kim
Jun 22, 2010·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Michael P Waliszewski
Nov 9, 2018·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Pooya SoltanzadehWendy Gregorius
May 23, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Keaton ForresterRodney D Phoenix
Jan 29, 2021·Journal of Prosthodontic Research·Atsushi TakaichiNoriyuki Wakabayashi
Nov 28, 2020·Clinical, Cosmetic and Investigational Dentistry·Noor Al MortadiRobert Williams
Jun 14, 2021·The Journal of Prosthetic Dentistry·Seyeon HwangRaymond C Rumpf
Nov 24, 2020·The Journal of Prosthetic Dentistry·Pei-Wen PengWei-Fang Lee

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