- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04050657
Appointment Intervals and Orthodontic Tooth Movement
February 4, 2020 updated by: Guy's and St Thomas' NHS Foundation Trust
A Randomized Clinical Trial Investigating the Effect of Appointment Intervals on Orthodontic Tooth Alignment
The purpose of this study is to investigate rapidity of tooth alignment in a randomised clinical trial of orthodontic patients allocated randomly into two different appointment intervals groups.
First group will be reviewed every two weeks to adjust their braces while the second group will be reviewed every 8 weeks.
Study Overview
Status
Unknown
Conditions
Intervention / Treatment
Detailed Description
Orthodontics is a branch of dentistry concerned primarily with the correction of dental crowding or tooth malalignment.
The first phase of fixed appliance orthodontic treatment is concerned with tooth alignment and relies upon a rapid and predictable response of the appliance system to the forces applied by the aligning archwire.
The appropriate length of time between orthodontic appointments, generally called the 'appointment interval', has been the subject of debate for many years.
Doctors all have their own preferences, based either on what they were taught in their orthodontic specialty programs or on community norms.
Little evidence has been presented in the orthodontic literature to support these biases.
The appointment interval may influence tooth alignment rates and treatment time along with other variables, such as periodontal status.
Accelerating orthodontic tooth movement can significantly reduce treatment duration and the risk of side-effects.
Study Type
Interventional
Enrollment (Anticipated)
46
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Prof. Martyn Cobourne
- Phone Number: 02071888028
- Email: martyn.cobourne@kcl.ac.uk
Study Contact Backup
- Name: Dr. Maisa Seppala
- Phone Number: 02071888028
- Email: maisa.seppala@kcl.ac.uk
Study Locations
-
-
-
London, United Kingdom, SE1 9RT
- Recruiting
- Guy's Hospital
-
Contact:
- Martyn Cobourne
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
12 years to 18 years (ADULT, CHILD)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
Subjects should:
- be aged 12-18 years old;
- present with a crowded lower arch that requires orthodontic tooth alignment with a fixed appliance;
- be medically fit and healthy (absence of systemic diseases);
- have normal weight (according to body mass index measurements BMI);
- have permanent dentition;
- have lower incisor irregularity of 5-12 mm;
- not having complete overbite;
- be either extraction or non-extraction cases;
- be able to give informed consent.
Exclusion Criteria:
- Subjects who have received fixed orthodontic treatment before.
- Subjects who will be participating in any other intervention trials.
- Subjects with reported nickel allergy.
- Subjects who have received antibiotic therapy in the previous six months, or who have any history of juvenile periodontal disease.
- Subjects who have lower incisor extracted tooth.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: RANDOMIZED
- Interventional Model: PARALLEL
- Masking: DOUBLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: Two-week appointment interval group
Orthodontic patients who come to tighten their braces every 2-weeks.
|
To change the appointment interval for one group and keep the standard interval for the other group by measuring alignment duration, measured as days needed to align the teeth using full-arch fixed appliances
|
OTHER: Eight-week appointment interval group
Orthodontic patients who come to tighten their braces every every 8-weeks.
|
To change the appointment interval for one group and keep the standard interval for the other group by measuring alignment duration, measured as days needed to align the teeth using full-arch fixed appliances
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Time to completion of alignment.
Time Frame: 4-10 months.
|
To measure the time taken to achieve orthodontic tooth alignment using fixed appliances in two groups of patients treated with different appointment intervals
|
4-10 months.
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Level of oral biomarkers
Time Frame: 4-10 months.
|
In vivo levels of oral biomarkers derived from gingival crevicular fluid in the periodontal ligament and saliva.
Biomarkers associated with orthodontic tooth movement and/or periodontitis will be tested, including biomarkers for tissue damage and inflammatory processes, such as Lactate dehydrogenase (LDH) and Aspartate aminotransferase (AST), biomarkers to asses inflammation in orthodontic movement, such as Myeloperoxidase (MPO) , biomarkers for resolution of organic matrix and bone resorption, such as Cathepsin B, biomarkers for periodontal ligament remodelling, such as Matrix Metalloproteinases (MMPs).
|
4-10 months.
|
Self-reported pain and discomfort.
Time Frame: 4-10 months.
|
At each adjustment visit, subjects will be given a prepared discomfort questionnaire to complete over the following week and to be returned at each subsequent visit.
This questionnaire records discomfort by means of a 100 mm visual analogue scale (VAS) at 4 hours, 24 hours, 3 days, and 1 week, using the terms 'very comfortable' and 'very uncomfortable' as peripheral weightings (Seymour, 1982).
The VAS score is the distance from the left end of the line to the point of the subject's mark, measured to the nearest millimetre.
|
4-10 months.
|
Periodontal health.
Time Frame: 4-10 months
|
Periodontal health will be measured using established Gingival and Plaque indices. The criteria for plaque index as: 0: No plaque
The criteria for gingival index as: 0: Normal gingiva.
|
4-10 months
|
Rate of tooth movement
Time Frame: 4-10 months
|
Rate of tooth alignment will be calculated from serial dental study casts using Little's Irregularity Index, which measures the horizontal linear contact-point displacement of each mandibular incisor from the adjacent tooth and therefore, represents the sum of the five individual displacements (Little, 1975).
|
4-10 months
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Prof. Martyn Cobourne, King's College London
- Principal Investigator: Dr. Guy Carpenter, King's College London
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
General Publications
- Saloom HF, Papageorgiou SN, Carpenter GH, Cobourne MT. Impact of Obesity on Orthodontic Tooth Movement in Adolescents: A Prospective Clinical Cohort Study. J Dent Res. 2017 May;96(5):547-554. doi: 10.1177/0022034516688448. Epub 2017 Jan 23.
- Scott P, DiBiase AT, Sherriff M, Cobourne MT. Alignment efficiency of Damon3 self-ligating and conventional orthodontic bracket systems: a randomized clinical trial. Am J Orthod Dentofacial Orthop. 2008 Oct;134(4):470.e1-8. doi: 10.1016/j.ajodo.2008.04.018.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (ACTUAL)
December 1, 2019
Primary Completion (ANTICIPATED)
January 1, 2022
Study Completion (ANTICIPATED)
May 1, 2022
Study Registration Dates
First Submitted
August 7, 2019
First Submitted That Met QC Criteria
August 7, 2019
First Posted (ACTUAL)
August 8, 2019
Study Record Updates
Last Update Posted (ACTUAL)
February 6, 2020
Last Update Submitted That Met QC Criteria
February 4, 2020
Last Verified
November 1, 2019
More Information
Terms related to this study
Other Study ID Numbers
- IRAS Project ID: 255727
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
YES
IPD Plan Description
Un-identified individual participant data for all primary and secondary outcome measures will be made available.
IPD Sharing Time Frame
Data will be available within 6 months of study completion.
IPD Sharing Access Criteria
Zenodo (open-access repository).
IPD Sharing Supporting Information Type
- STUDY_PROTOCOL
- SAP
- ICF
- ANALYTIC_CODE
- CSR
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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