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Updated: Jan 7, 2026

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Success Rates of a CAD/CAM Nickel-Titanium Orthodontic Fixed Retainer.

Luis Huanca Ghislanzoni1, Candice Durgnat1, Gregory S Antonarakis1

  • 1Division of orthodontics, University Clinics of Dental Medicine, University of Geneva, 1205 Geneva, Switzerland.

Journal of Clinical Medicine
|December 30, 2025
PubMed
Summary
This summary is machine-generated.

This study found that CAD/CAM nickel-titanium fixed retainers (Memotain®) showed good success rates over one year. While debonding and retainer loss occurred, the overall survival rates were promising for orthodontic retention.

Keywords:
CAD/CAMfixed retainerretainerretrospective study

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Area of Science:

  • Orthodontics
  • Biomaterials Science
  • Dental Materials

Background:

  • Fixed orthodontic retainers are crucial for maintaining post-treatment tooth alignment.
  • Nickel-titanium alloys offer unique properties for orthodontic applications.
  • CAD/CAM technology enables precise fabrication of dental devices.

Purpose of the Study:

  • To evaluate the one-year success rate of CAD/CAM nickel-titanium wires (Memotain®) as fixed orthodontic retainers.
  • To identify failure modes and their frequencies in Memotain® retainers.
  • To assess the retainer's performance in both maxillary and mandibular arches.

Main Methods:

  • Retrospective analysis of 338 Memotain® retainers in 205 patients over a one-year period.
  • Data collected at 6-month (T1) and 12-month (T2) follow-up visits.
  • Success defined by absence of debonding, breakage, retainer loss, or tooth displacement; failures were categorized by tooth and event.

Main Results:

  • Mandibular arch: 85% success at T1, 77% at T2. Debonding was the primary failure mode.
  • Maxillary arch: 83% success at T1, 78% at T2. Debonding, retainer loss, and wire breakage were observed.
  • High success rates noted for individual teeth, particularly canines and incisors, across both arches.

Conclusions:

  • CAD/CAM nickel-titanium fixed retainers (Memotain®) exhibit promising one-year survival rates.
  • Further long-term, multicenter studies are necessary to validate the reliability of these retainers.
  • The findings suggest Memotain® is a viable option for orthodontic retention, warranting continued investigation.