- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05738889
Comparative Evaluation of Salivary Bisphenol-A Levels in Patients With Fixed Lingual, Hawley and Vacuum-formed Retainers
The aim of this study; to measure the BPA release amount of fixed lingual retainers applied with Bis-GMA-containing composite , fixed lingual retainers applied with Bis-GMA-free composite, vacuum-formed and hawley retainers which used for retention after orthodontic treatment to evaluate whether they are risk factors for the patient and to compare BPA releases.
Study method and data collection techniques: In this study, individuals will be selected from the patients who will be treated at Aydın Adnan Menderes University Faculty of Dentistry, Department of Orthodontics between July 2021 and July 2022, whose orthodontic treatment will be completed. These patients will be randomly divided into four groups according to the type of retention appliance to be chosen: those who are applied a fixed lingual retainer with a bis-GMA-containing composite, those with a fixed lingual retainer with a bis-GMA-free composite, those with an vacuum formed retainers, and those with a hawley retainers. After the debonding of the fixed attachments at the end of the treatment appointment, the retention appliances will be applied 1 day later so that BPA, which is released from the resin adhesives used to bond the attachments, does not affect the study data. Saliva samples will be taken from the patients before the appliance is inserted, 1 hour, 7 days and 30 days after the appliance is inserted.
Study Overview
Status
Conditions
Detailed Description
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Efeler
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Aydın, Efeler, Turkey, 09000
- Aydın Adnan Menderes University Faculty of Dentistry
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- be between the ages 10-18
- absence of any systemic disease
- good oral hygiene
- completion of orthodontic treatment
- non smoker
- Not working in jobs where they will be exposed to chronic BPA release, such as gas station construction site or acrylic related jobs
Exclusion Criteria:
- be under 10 years or over 18 years
- any systemic disease
- poor oral hygiene
- ıncomplete orthodontic treatment
- being a smoker
- working in jobs where they will e exposed to chronic BPA release, such as gas station construction site or acrylic related jobs
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Group 1: Patients with fixed lingual retainers applied with Bis-GMA containing composite
In the maxilla and mandible, the lingual surfaces of the anterior six teeth, including the canines, were roughened and bonded by applying 37.5% phosphoric acid for 30 seconds.
Then, the retainer wire was adhered to the lingual surfaces of the teeth between the canine-canines in the maxilla and mandible, where a fixed lingual retainer will be applied, with a flowable composite adhesive containing Bis-GMA, with 10 seconds of illumination for 60 seconds for each tooth.
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Bonding materials of fixed lingual retainers applied with Bis-GMA containing composite
Other Names:
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Group 2: Patients with fixed lingual retainers applied with Bis-GMA-free composite
The lingual surfaces of the anterior six teeth, including the canines, in the maxilla and mandible were roughened by the application of 37.5% phosphoric acid for 30 seconds.
Since the applied composite system is one-stage, no additional bond application was done.
Fixed lingual retainer wire was applied with a Bis-GMA-free flowable composite adhesive with 60 seconds exposure for 10 seconds for each tooth.
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Bonding materials of fixed lingual retainers applied with Bis-GMA-free composite
Other Names:
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Group 3: Patients with vacuum-formed retainers
Impressions were taken with alginate impression material from the maxilla and mandible of the volunteers whose treatment was completed, and a model was obtained with a hard cast.
On the models obtained, vacuum formed retainers were prepared with a vacuum forming machine.
The use and care instructions of vacuum formed retainers were explained to the patient orally.
vacuum formed retainers were used by the patient for 22 hours.
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vacuum-forming machine and vacuum formed plates
Other Names:
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Group 4: Patients with hawley retainers
Impressions were taken with alginate impression material from the volunteers in the Hawley retainers group and a model was obtained with hard plaster.
Wire elements were made on the model obtained and the appliance was prepared from transparent acrylic material.
After the leveling and polishing processes were completed, the hawley retainers was attached to the mouth.
It is stated that the appliance is used for 22 hours in 1 day.
The use and care instructions of the Hawley retainers are explained to the patient.
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Acrylic based hawley retainers
Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Bisphenol-A amount in saliva before applying a retainer with bis-GMA-containing composite
Time Frame: 1 day after debonding and before retention appliance to 1 month.
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The main purpose of this thesis study is to determine the appliance with the least BPA release by comparing the Bisphenol-A(BPA) release levels from lingual retainers, vacuum formed retainers and hawley retainers used for retention after orthodontic treatment.
Saliva samples were taken from volunteers at regular intervals, a total of 4 times.
First example; One day after debonding, before applying the retention appliance, the second sample; One hour after the retention appliance was applied, the third sample was taken 1 week later and the fourth sample 1 month later.
Analysis of the change in BPA was done.
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1 day after debonding and before retention appliance to 1 month.
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Bisphenol-A amount in saliva before applying a retainer with bis-GMA-free composite
Time Frame: 1 day after debonding and before retention appliance to 1 month.
|
The main purpose of this thesis study is to determine the appliance with the least BPA release by comparing the Bisphenol-A(BPA) release levels from lingual retainers, vacuum formed retainers and hawley retainers used for retention after orthodontic treatment.
Saliva samples were taken from volunteers at regular intervals, a total of 4 times.
First example; One day after debonding, before applying the retention appliance, the second sample; One hour after the retention appliance was applied, the third sample was taken 1 week later and the fourth sample 1 month later.
Analysis of the change in BPA was done.
|
1 day after debonding and before retention appliance to 1 month.
|
Bisphenol-A amount in saliva before applying vacuum formed retainer
Time Frame: 1 day after debonding and before retention appliance to 1 month.
|
The main purpose of this thesis study is to determine the appliance with the least BPA release by comparing the Bisphenol-A(BPA) release levels from lingual retainers, vacuum formed retainers and hawley retainers used for retention after orthodontic treatment.
Saliva samples were taken from volunteers at regular intervals, a total of 4 times.
First example; One day after debonding, before applying the retention appliance, the second sample; One hour after the retention appliance was applied, the third sample was taken 1 week later and the fourth sample 1 month later.
Analysis of the change in BPA was done.
|
1 day after debonding and before retention appliance to 1 month.
|
Bisphenol-A amount in saliva before applying hawley retainer
Time Frame: 1 day after debonding and before retention appliance to 1 month.
|
The main purpose of this thesis study is to determine the appliance with the least BPA release by comparing the Bisphenol-A(BPA) release levels from lingual retainers, vacuum formed retainers and hawley retainers used for retention after orthodontic treatment.
Saliva samples were taken from volunteers at regular intervals, a total of 4 times.
First example; One day after debonding, before applying the retention appliance, the second sample; One hour after the retention appliance was applied, the third sample was taken 1 week later and the fourth sample 1 month later.
Analysis of the change in BPA was done.
|
1 day after debonding and before retention appliance to 1 month.
|
Collaborators and Investigators
Sponsor
Publications and helpful links
General Publications
- Raghavan AS, Pottipalli Sathyanarayana H, Kailasam V, Padmanabhan S. Comparative evaluation of salivary bisphenol A levels in patients wearing vacuum-formed and Hawley retainers: An in-vivo study. Am J Orthod Dentofacial Orthop. 2017 Mar;151(3):471-476. doi: 10.1016/j.ajodo.2016.07.022.
- Manoj MK, Ramakrishnan R, Babjee S, Nasim R. High-performance liquid chromatography analysis of salivary bisphenol A levels from light-cured and chemically cured orthodontic adhesives. Am J Orthod Dentofacial Orthop. 2018 Dec;154(6):803-808. doi: 10.1016/j.ajodo.2018.02.008.
- Eliades T, Voutsa D, Sifakakis I, Makou M, Katsaros C. Release of bisphenol-A from a light-cured adhesive bonded to lingual fixed retainers. Am J Orthod Dentofacial Orthop. 2011 Feb;139(2):192-5. doi: 10.1016/j.ajodo.2009.12.026.
- Sasaki N, Okuda K, Kato T, Kakishima H, Okuma H, Abe K, Tachino H, Tuchida K, Kubono K. Salivary bisphenol-A levels detected by ELISA after restoration with composite resin. J Mater Sci Mater Med. 2005 Apr;16(4):297-300. doi: 10.1007/s10856-005-0627-8.
- Kang YG, Kim JY, Kim J, Won PJ, Nam JH. Release of bisphenol A from resin composite used to bond orthodontic lingual retainers. Am J Orthod Dentofacial Orthop. 2011 Dec;140(6):779-89. doi: 10.1016/j.ajodo.2011.04.022.
- Eliades T, Hiskia A, Eliades G, Athanasiou AE. Assessment of bisphenol-A release from orthodontic adhesives. Am J Orthod Dentofacial Orthop. 2007 Jan;131(1):72-5. doi: 10.1016/j.ajodo.2006.08.013.
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- DHF-21010
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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