Comparison Physiological Tooth Mobility and Retention Success in Patients Using Different Retainers
30. srpna 2026 aktualizováno: 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.
Přehled studie
Postavení
Aktivní, ne nábor
Podmínky
Typ studie
Pozorovací
Zápis (Odhadovaný)
80
Kontakty a umístění
Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.
Studijní místa
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Istanbul, Turecko (Türkiye), 34784
- Marmara University
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Kritéria účasti
Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.
Kritéria způsobilosti
Věk způsobilý ke studiu
- Dospělý
Přijímá zdravé dobrovolníky
Ano
Metoda odběru vzorků
Ukázka pravděpodobnosti
Studijní populace
Healthy volunteers whose orthodontic treatment finalized and who waited for taking off braces.
Popis
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
Studijní plán
Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.
Jak je studie koncipována?
Detaily designu
Kohorty a intervence
Skupina / kohorta |
Intervence / Léčba |
|---|---|
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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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Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
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Tooth mobility
Časové okno: 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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Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Little irregularity
Časové okno: 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
Časové okno: 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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Spolupracovníci a vyšetřovatelé
Zde najdete lidi a organizace zapojené do této studie.
Sponzor
Publikace a užitečné odkazy
Osoba odpovědná za zadávání informací o studiu tyto publikace poskytuje dobrovolně. Mohou se týkat čehokoli, co souvisí se studiem.
Obecné publikace
- 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.
Termíny studijních záznamů
Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.
Hlavní termíny studia
Začátek studia (Aktuální)
15. června 2026
Primární dokončení (Odhadovaný)
1. ledna 2027
Dokončení studie (Odhadovaný)
1. března 2027
Termíny zápisu do studia
První předloženo
19. července 2026
První předloženo, které splnilo kritéria kontroly kvality
30. srpna 2026
První zveřejněno (Aktuální)
3. září 2026
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
3. září 2026
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
30. srpna 2026
Naposledy ověřeno
1. června 2026
Více informací
Termíny související s touto studií
Další relevantní podmínky MeSH
Další identifikační čísla studie
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Plán pro data jednotlivých účastníků (IPD)
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NEROZHODNÝ
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