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Comparison Physiological Tooth Mobility and Retention Success in Patients Using Different Retainers

30. August 2026 aktualisiert von: gulden karabiber, Marmara University
The purpose of this prospective clinical study is to comparatively evaluate the long-term stability of teeth, physiological tooth mobility, and effects on periodontal tissues of three different fixed lingual retainer materials used to prevent relapse following orthodontic treatment. A total of 80 participants whose orthodontic treatment is completed will be randomly and equally distributed into four groups as one control (n=20) and three study groups (n=20 each): Group 1 will receive CAD/CAM-fabricated 0.016-inch Nitinol wire; Group 2 will receive manually bent multi- strand 0.0215-inch stainless steel wire; and Group 3 will receive 0.030-inch stainless steel chain retainers. Control group will be 20 samples. Clinical and radiographic measurements will be performed at the day of debonding (T0) and at a 6-month follow-up (T1). Physiological tooth mobility will be measured objectively using a Periotest device. Relapse amounts will be assessed by superimposing intraoral digital scans via Nemocast software using Little's Irregularity Index, and the 6-month failure/breakage rates of the retainers will be recorded. The null hypothesis states that there is no statistically significant difference among the different retainer materials regarding tooth stability, relapse, and physiological mobility.

Studienübersicht

Status

Aktiv, nicht rekrutierend

Bedingungen

Intervention / Behandlung

Studientyp

Beobachtungs

Einschreibung (Geschätzt)

80

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene

Akzeptiert gesunde Freiwillige

Ja

Probenahmeverfahren

Wahrscheinlichkeitsstichprobe

Studienpopulation

Healthy volunteers whose orthodontic treatment finalized and who waited for taking off braces.

Beschreibung

Inclusion Criteria:

  1. Patients who have undergone fixed orthodontic treatment at the Department of Orthodontics, Faculty of Dentistry, Marmara University, and whose treatment is nearing completion
  2. Patients whose treatment duration is between 2 and 3 years
  3. Patients with healthy periodontal tissue (plaque index and gingival index <1; bleeding on probing <10 per cent; no clinical attachment loss)
  4. Patients aged between 18 and 35
  5. Systemically healthy individuals
  6. Patients with deep bite for whom Nitinol wire retainers, manufactured using CAD/CAM technology and capable of being fitted without occlusal contact due to their adaptability to the occlusion, have been applied
  7. Patients for whom impressions cannot be taken to fabricate a retainer
  8. Patients without deep bite or a gag reflex who have had a standard retainer fitted

Exclusion Criteria:

  1. Patients who have undergone orthodontic treatment at another clinic
  2. Patients whose treatment lasted longer than 3 years or less than 2 years
  3. Patients with a cleft lip and palate or a related syndrome
  4. Patients with caries or dental prostheses on the teeth where the retainer is to be bonded
  5. Smokers
  6. Individuals with missing anterior teeth
  7. Individuals taking systemic medication that affects the immune system or may affect periodontal health (e.g. steroids)
  8. Pregnant or breastfeeding women

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

Kohorten und Interventionen

Gruppe / Kohorte
Intervention / Behandlung
1. Control
healthy gingiva, no smoking, non-pregnant, age:18-35, patients did not receive any orthodontic treatment and don't have bruxism and syndrome
T0 Mobility measurement with Periotest device after orthodontic treatment finished; before retainer simantation and after simantation. T1 Mobility measurement with Periotest device 6 months later; with retainer and without retainer.
T0 digital dental models will be taken with 3D scanner after orthodontic treatment finished; after retainer simantation. T1 digital dental models will be taken 6 months later with retainer. And Little irregularity index, arch length measurement will be performed.
2. CAD-CAM Nitinol wire (Memotain)
Just finished orthodontic treatment, healthy gingiva, no smoking, non-pregnant, age:18-35, patients don't have bruxism and syndrome
T0 Mobility measurement with Periotest device after orthodontic treatment finished; before retainer simantation and after simantation. T1 Mobility measurement with Periotest device 6 months later; with retainer and without retainer.
T0 digital dental models will be taken with 3D scanner after orthodontic treatment finished; after retainer simantation. T1 digital dental models will be taken 6 months later with retainer. And Little irregularity index, arch length measurement will be performed.
3. Manually bent 6 multi- strand 0.0215-inch stainless steel wire
Just finished orthodontic treatment, healthy gingiva, no smoking, non-pregnant, age:18-35, patients don't have bruxism and syndrome
T0 Mobility measurement with Periotest device after orthodontic treatment finished; before retainer simantation and after simantation. T1 Mobility measurement with Periotest device 6 months later; with retainer and without retainer.
T0 digital dental models will be taken with 3D scanner after orthodontic treatment finished; after retainer simantation. T1 digital dental models will be taken 6 months later with retainer. And Little irregularity index, arch length measurement will be performed.
4. 0.030-inch stainless steel chain
Just finished orthodontic treatment, healthy gingiva, no smoking, non-pregnant, age:18-35, patients don't have bruxism and syndrome
T0 Mobility measurement with Periotest device after orthodontic treatment finished; before retainer simantation and after simantation. T1 Mobility measurement with Periotest device 6 months later; with retainer and without retainer.
T0 digital dental models will be taken with 3D scanner after orthodontic treatment finished; after retainer simantation. T1 digital dental models will be taken 6 months later with retainer. And Little irregularity index, arch length measurement will be performed.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Tooth mobility
Zeitfenster: From enrollment to the end of treatment at 6 months
Tooth mobility will be assessed using the Periotest device. The device will be applied to the buccal surface of the tooth, and the Periotest value (PTV) will be recorded according to the manufacturer's instructions. Higher PTV values indicate greater tooth mobility. Measurements will be recorded as Periotest values (PTV).
From enrollment to the end of treatment at 6 months

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Little irregularity
Zeitfenster: From enrollment to the end of treatment at 6 months
Anterior dental irregularity will be assessed using Little's Irregularity Index, measured as the sum of the five linear displacements between the anatomic contact points of the mandibular anterior teeth, in millimeters (mm). This assessment will be performed on digital intraoral models by using Orthomodel (Orthomodel, İstanbul, Türkiye) software.
From enrollment to the end of treatment at 6 months
Arch length
Zeitfenster: From enrollment to the end of treatment at 6 months
Dental arch length will be assessed by measuring the linear distance from the midpoint between the central incisors to a line connecting the distal surfaces of the first permanent molars, in millimeters (mm). This assessment will be performed on digital intraoral models by using Orthomodel (Orthomodel, İstanbul, Türkiye) software.
From enrollment to the end of treatment at 6 months

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

15. Juni 2026

Primärer Abschluss (Geschätzt)

1. Januar 2027

Studienabschluss (Geschätzt)

1. März 2027

Studienanmeldedaten

Zuerst eingereicht

19. Juli 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

30. August 2026

Zuerst gepostet (Tatsächlich)

3. September 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

3. September 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

30. August 2026

Zuletzt verifiziert

1. Juni 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • GKAY-ret

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UNENTSCHIEDEN

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