Orthodontics Clinical Trial
Official title:
Effects of Photobiomodulation Therapy (PBM) on Dental and Periodontal Health of Patients Undergoing Fixed-appliance Orthodontic Treatment
The aim of this study is to investigate the effects of photobiomodulation therapy (PBM) on the dental and periodontal health of patients undergoing fixed-appliance orthodontic treatment, including orthodontically induced root resorption, orthodontic pain, space closing rate, and dental microbiome profile in dental plaques.
Status | Recruiting |
Enrollment | 50 |
Est. completion date | December 1, 2027 |
Est. primary completion date | June 1, 2027 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 18 Years to 35 Years |
Eligibility | Inclusion Criteria: 1. Patients aged between 18 and 35 years old with permanent dentition 2. Patients who undertake orthodontic treatment using fixed appliances 3. Patients who require extraction of premolars in either their upper or lower dental arch 4. Patients who have fair oral hygiene habits 5. Patients who are systemically healthy Exclusion Criteria: 1. Patients with generalized dental caries and severe chronic periodontitis in stages III and IV 2. Patients with congenital or severe craniofacial anomalies which necessitate orthognathic surgery 3. Patients with physical or mental impairment, and those who smoke or undertake systemic medications 4. Patients with current root resorption at any of the teeth 5. Patients with endodontic treatment and/or large restorations on premolars to be extracted |
Country | Name | City | State |
---|---|---|---|
Hong Kong | The University of Hong Kong | Hong Kong |
Lead Sponsor | Collaborator |
---|---|
The University of Hong Kong |
Hong Kong,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Orthodontic-induced inflammatory root resorption (OIIRR) | Record OIIRR by calculating the volume of craters on the root surfaces of the extracted tooth using a standard micro-CT machine after 3 months following intrusions by cantilever auxiliary arch. | baseline, 3 months after intrusive force loading | |
Secondary | Orthodontic pain | Record orthodontic pain monthly since the beginning of regular orthodontic treatment by patients' self-registration on a 100-millimetre Visual Analogue Scale (VAS). 0 means "no pain", 100 means "worst pain", the higher the score, the more severe the pain. In addition, 5-millilitre unstimulated saliva samples will be collected from each participant with the same time scheme for evaluation of pain-related biomarkers. | baseline, immediately after fixed appliance placement and immediately after adjustment every month during the first year of regular orthodontic treatment | |
Secondary | Space closure by en masse retraction | Record the duration of the space closure by calculating the rate of tooth movement (mm/mo) with physically measurement. In addition, gingival crevicular fluid samples will be collected from the two space-neighbouring teeth to analyse bone-related biomarkers. | every month from the start of space closure to the end of closure, taking into account the very slow closure of space, assessed up to 12 months | |
Secondary | Microbiome profile in dental plaques | Samples of supragingival and subgingival plaques will proceed to 16S rRNA sequencing for analysis of microbiome profiles, and q-PCR for evaluating bacterial loads of some critical pathogens for dental caries and periodontitis. | baseline, every 3 months from the start of regular orthodontic treatment to the end of treatment process |
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