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Related Experiment Video

Updated: Jul 7, 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

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[First clinical experiences with ceramic ball attachments for overdentures].

Adrian E Büttel1, Fredy Schmidli, Carlo P Marinello

  • 1Klinik für Rekonstruktive Zahnmedizin und Myoarthropathien, Universitätskliniken für Zahnmedizin, Universität Basel. adrian.buettel@unibas.ch

Schweizer Monatsschrift Fur Zahnmedizin = Revue Mensuelle Suisse D'Odonto-Stomatologie = Rivista Mensile Svizzera Di Odontologia E Stomatologia
|February 26, 2008
PubMed
Summary

Ceramic ball attachments for dental implants failed frequently due to fractures within a year. Metal-based retainers are recommended for implant-retained prostheses, despite higher wear potential.

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Area of Science:

  • Biomaterials Science
  • Dental Implantology
  • Prosthodontics

Background:

  • Dental implants often utilize ball attachments for retaining removable prostheses.
  • Ceramic materials are explored for dental applications due to their properties, but clinical performance requires validation.
  • Titanium attachments are a conventional choice, with known wear characteristics.

Purpose of the Study:

  • To compare the 1-year clinical performance and wear of ceramic (ruby) versus titanium ball attachments in implant-retained removable prostheses.
  • To assess the durability and failure modes of ceramic ball attachments under intraoral conditions.

Main Methods:

  • Prospective clinical study involving 40 patients with edentulous jaws and two interforaminal implants.
  • Comparison of commercially available ceramic (ruby) and titanium ball attachments over a 1-year period.

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  • Monitoring for wear, fractures, and other failures of the attachments.

    • Main Results:

    • Ceramic ball attachments exhibited high failure rates, with 28% (12 of 43) requiring replacement within 7-12 months.
    • Fractures of the ceramic ball were the primary failure mode (8 instances).
    • The study was curtailed for ceramic attachments, preventing evaluation of wear resistance and compressive strength.

    Conclusions:

    • The investigated ceramic ball attachments demonstrated insufficient durability for intraoral use, failing to withstand normal stresses.
    • Secure integration of ceramic components with metal bases presents challenges.
    • Metal-based retainers remain the recommended option for implant-retained removable prostheses, with strategies to manage expected wear.