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Related Experiment Video

Updated: Jun 27, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

[Titanium-alloy vs. CoCr-alloy in removable partial dentures--a clinical study].

Joannis Katsoulis1, Jens Fischer, Sandra Huber

  • 1Klinik für Zahnärztliche Prothetik, Zahnmedizinische Kliniken der Universität Bern, Freiburgstrasse 7, CH-3010 Bern. joannis.katsoulis@zmk.unibe.ch

Schweizer Monatsschrift Fur Zahnmedizin = Revue Mensuelle Suisse D'Odonto-Stomatologie = Rivista Mensile Svizzera Di Odontologia E Stomatologia
|December 11, 2008
PubMed
Summary

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Titanium-aluminum-niobium (Ti6Al7Nb) alloy frameworks for removable partial dentures (RPDs) are equivalent to cobalt-chromium (CoCr) alloys. This titanium alloy offers a viable alternative for patients with CoCr allergies.

Area of Science:

  • Biomaterials Science
  • Dental Materials
  • Prosthodontics

Background:

  • Cobalt-chromium (CoCr) alloys are traditionally used for removable partial denture (RPD) frameworks.
  • Titanium alloys offer improved properties, such as a lower elastic modulus, and are being explored as alternatives.
  • Advancements in casting and processing techniques facilitate the fabrication of complex titanium frameworks with limited porosity.

Purpose of the Study:

  • To summarize the current use of titanium in removable prosthodontics.
  • To prospectively evaluate the clinical performance of the Ti6Al7Nb alloy for RPD frameworks in a patient cohort.

Main Methods:

  • Ten patients received two identically designed RPDs, one with a CoCr framework and one with a Ti6Al7Nb framework.
  • Patients wore each RPD for six months, alternating between the two materials.

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  • Patient-reported outcomes (comfort, stability, retention) were assessed using visual analogue scales (VAS) at 1, 3, and 6 months.
  • Prosthetic complications and required maintenance were recorded.
  • A final evaluation occurred after 12 months, with patients retaining the Ti6Al7Nb RPD.

    • Main Results:

    • Dentists positively assessed all RPD design parameters for both materials.
    • Patients reported minimal, non-significant differences in comfort, stability, and retention between CoCr and Ti6Al7Nb RPDs.
    • No significant clinical differences in technical aspects or biological complications were observed between the two materials after six months.
    • Objective material assessments revealed no discernible differences between the alloys.

    Conclusions:

    • The Ti6Al7Nb alloy is clinically equivalent to CoCr alloy for removable partial denture frameworks.
    • This titanium alloy presents a beneficial alternative for patients experiencing allergies or incompatibility with CoCr alloy components.
    • No objective material differences were observed, supporting the clinical equivalence.