Clinical application of removable partial dentures using thermoplastic resin-part I: definition and indication of non-metal clasp dentures

J Prosthodont Res. 2014 Jan;58(1):3-10. doi: 10.1016/j.jpor.2013.12.002. Epub 2014 Jan 22.


This position paper proposes a definition and naming standard for removable partial dentures (RPDs) using thermoplastic resin, and presents a guideline for clinical application. A panel of 14 experts having broad experience with clinical application of RPDs using thermoplastic resin was selected from members of the Japan Prosthodontic Society. At a meeting of the panel, "non-metal clasp denture" was referred as the generic name of RPDs with retentive elements (resin clasps) made of thermoplastic resin. The panel classified non-metal clasp dentures into two types: one with a flexible structure that lacks a metal framework and the other having a rigid structure that includes a metal framework. According to current prosthetic principles, flexible non-metal clasp dentures are not recommended as definitive dentures, except for limited cases such as patients with a metal allergy. Rigid non-metal clasp dentures are recommended in cases where patients will not accept metal clasps for esthetic reasons. Non-metal clasp dentures should follow the same design principles as conventional RPDs using metal clasps.

Keywords: Metal allergy; Non-metal clasp denture; Removable partial denture; Resin clasp; Thermoplastic resin.

Publication types

  • Review

MeSH terms

  • Contraindications
  • Dental Clasps*
  • Denture Design*
  • Denture Retention
  • Denture, Partial, Removable*
  • Humans
  • Metals / adverse effects
  • Resins, Synthetic*


  • Metals
  • Resins, Synthetic