Comparison Physiological Tooth Mobility and Retention Success in Patients Using Different Retainers
30 de agosto de 2026 actualizado por: 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.
Descripción general del estudio
Estado
Activo, no reclutando
Condiciones
Tipo de estudio
De observación
Inscripción (Estimado)
80
Contactos y Ubicaciones
Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.
Ubicaciones de estudio
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Istanbul, Turquía (Türkiye), 34784
- Marmara University
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Criterios de participación
Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
Acepta Voluntarios Saludables
Sí
Método de muestreo
Muestra de probabilidad
Población de estudio
Healthy volunteers whose orthodontic treatment finalized and who waited for taking off braces.
Descripción
Inclusion Criteria:
- Patients who have undergone fixed orthodontic treatment at the Department of Orthodontics, Faculty of Dentistry, Marmara University, and whose treatment is nearing completion
- Patients whose treatment duration is between 2 and 3 years
- Patients with healthy periodontal tissue (plaque index and gingival index <1; bleeding on probing <10 per cent; no clinical attachment loss)
- Patients aged between 18 and 35
- Systemically healthy individuals
- 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
- Patients for whom impressions cannot be taken to fabricate a retainer
- Patients without deep bite or a gag reflex who have had a standard retainer fitted
Exclusion Criteria:
- Patients who have undergone orthodontic treatment at another clinic
- Patients whose treatment lasted longer than 3 years or less than 2 years
- Patients with a cleft lip and palate or a related syndrome
- Patients with caries or dental prostheses on the teeth where the retainer is to be bonded
- Smokers
- Individuals with missing anterior teeth
- Individuals taking systemic medication that affects the immune system or may affect periodontal health (e.g. steroids)
- Pregnant or breastfeeding women
Plan de estudios
Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.
¿Cómo está diseñado el estudio?
Detalles de diseño
Cohortes e Intervenciones
Grupo / Cohorte |
Intervención / Tratamiento |
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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
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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.
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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
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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.
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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
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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.
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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
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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.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Tooth mobility
Periodo de tiempo: From enrollment to the end of treatment at 6 months
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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).
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From enrollment to the end of treatment at 6 months
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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Little irregularity
Periodo de tiempo: From enrollment to the end of treatment at 6 months
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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.
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From enrollment to the end of treatment at 6 months
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Arch length
Periodo de tiempo: From enrollment to the end of treatment at 6 months
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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.
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From enrollment to the end of treatment at 6 months
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Colaboradores e Investigadores
Aquí es donde encontrará personas y organizaciones involucradas en este estudio.
Patrocinador
Publicaciones y enlaces útiles
La persona responsable de ingresar información sobre el estudio proporciona voluntariamente estas publicaciones. Estos pueden ser sobre cualquier cosa relacionada con el estudio.
Publicaciones Generales
- Kucera J, Marek I, Littlewood SJ. The effect of different bonded retainer wires on tooth mobility immediately after orthodontic treatment. Eur J Orthod. 2022 Mar 30;44(2):178-186. doi: 10.1093/ejo/cjab038.
- Kucuk EB, Celik Guler O, Fatih Arpag O, Eren HK. Effect of different fixed lingual retainers on tooth mobility: prospective clinical study. Acta Odontol Scand. 2025 Dec 10;84:577-582. doi: 10.2340/aos.v84.44808.
- Tanaka E, Ueki K, Kikuzaki M, Yamada E, Takeuchi M, Dalla-Bona D, Tanne K. Longitudinal measurements of tooth mobility during orthodontic treatment using a periotest. Angle Orthod. 2005 Jan;75(1):101-5. doi: 10.1043/0003-3219(2005)0752.0.CO;2.
Fechas de registro del estudio
Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.
Fechas importantes del estudio
Inicio del estudio (Actual)
15 de junio de 2026
Finalización primaria (Estimado)
1 de enero de 2027
Finalización del estudio (Estimado)
1 de marzo de 2027
Fechas de registro del estudio
Enviado por primera vez
19 de julio de 2026
Primero enviado que cumplió con los criterios de control de calidad
30 de agosto de 2026
Publicado por primera vez (Actual)
3 de septiembre de 2026
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
3 de septiembre de 2026
Última actualización enviada que cumplió con los criterios de control de calidad
30 de agosto de 2026
Última verificación
1 de junio de 2026
Más información
Términos relacionados con este estudio
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- GKAY-ret
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
INDECISO
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