TL;DR: A randomized controlled trial published online on November 10, 2026 in Clinical Oral Investigations reports that adolescents given oral vitamin D₃ during fixed orthodontic treatment finished about 1.69 months (roughly 51 days) sooner than an unsupplemented control group. It is one small trial that reports saliva rather than blood levels, and the authors themselves say more research is needed before routine use. For Canadian orthodontic and general practices, it is a study to know about, not a protocol to adopt.
Patients and parents regularly ask how long braces will take. As of November 2026, a new trial by researchers in Tamil Nadu, India, adds a nutritional angle to the debate: can a patient's vitamin D status influence how quickly teeth move? The study, by Sagar, Ramani, Moses and Jeyaraj, appears in volume 30, issue 12 of Clinical Oral Investigations and is indexed in PubMed as a randomized controlled trial (PMID 43007448).
Here is what the trial did, what it found, and how dental professionals in Toronto, the GTA and the rest of Canada should read it.
What did the vitamin D orthodontic trial test?
The researchers enrolled 52 adolescents aged 13 to 18. Every participant had an Angle Class I malocclusion and a treatment plan that required extraction of all four first premolars, which gave the study a fairly uniform group of cases with extraction space to close.
Participants were randomly split into two groups of 26:
- Control group: received no vitamin D₃ supplementation.
- Supplementation group: received oral vitamin D₃ at 60,000 IU every 20 days.
The authors report that allocation was concealed with the Sequentially Numbered Opaque Sealed Envelope (SNOSE) method. The abstract describes the control group as receiving no supplement; it does not mention a placebo.
The team collected unstimulated saliva at three points in treatment and measured vitamin D₃ concentrations with an enzyme-linked immunosorbent assay (ELISA). The abstract does not describe blood tests. Samples were taken at:
- T1: archwire insertion
- T2: extraction space closure
- T3: debonding
Overall treatment duration was counted from initial archwire placement to appliance debonding, and the groups were compared with independent samples t-tests, with significance set at p ≤ 0.05.
What did the study find?
At baseline, the authors report that salivary vitamin D₃ levels were comparable between groups. After that, the supplemented group had higher salivary levels at space closure and at debonding, and a shorter overall treatment time.
Salivary vitamin D₃ levels
- At extraction space closure (T2): 44.39 ± 5.22 ng/mL in the supplemented group versus 38.19 ± 8.65 ng/mL in controls (p = 0.003).
- At debonding (T3): 48.31 ± 4.86 ng/mL versus 39.91 ± 8.04 ng/mL (p < 0.001).
The authors observed no significant differences in salivary vitamin D₃ levels between male and female participants.
Total orthodontic treatment time
The headline result: the supplemented group finished treatment in a mean of 17.81 ± 1.12 months, compared with 19.50 ± 1.35 months for controls. That is a mean reduction of 1.69 months, which the authors put at approximately 51 days (p < 0.001).
How strong is this evidence?
A treatment about 1.7 months shorter would matter to patients, so it is worth being precise about what this trial can and cannot tell your practice.
- It is one trial with 52 participants. Small randomized trials are useful signals, but effect sizes from a single study may shrink when the question is tested again in larger, multi-centre trials.
- Vitamin D was measured in saliva. The abstract reports salivary vitamin D₃ concentrations; it does not describe blood (serum) tests, which are commonly used to assess vitamin D status. The authors describe salivary monitoring as a practical, non-invasive method with "potential", while saying further studies are required to establish its clinical utility.
- No placebo is described in the abstract. Without a placebo, it is harder to rule out differences in how patients or clinicians behaved between groups. The full text, which is behind a subscription, may give more detail on blinding.
- The case mix was narrow. Adolescents, Class I, four-premolar extractions. Results may not carry over to adults, non-extraction cases, aligner therapy or other malocclusions.
- The authors are cautious. In their clinical-relevance statement, they say supplementation "should be individualized and guided by clinical assessment" and that further studies are required before routine clinical implementation.
Pro Tip: When a patient or parent brings a headline like this to a consult, pull up the abstract on PubMed (PMID 43007448) together. Showing the sample size and the study population in a couple of minutes does more for trust than either dismissing or endorsing the finding.
What does this mean for orthodontic care in Canada?
For practices in Toronto, Mississauga, Markham and across Ontario, the practical message is restraint. Vitamin D supplementation is a systemic medical intervention. Dosing is a decision for the patient's physician, who can assess their overall health, existing supplements and any reason to test vitamin D status. Nothing in this study shifts that responsibility to the dental team.
That still leaves useful things the dental team can do:
- Take a complete medical and supplement history at the orthodontic records appointment, and update it during treatment. Patients may not think to mention over-the-counter vitamins.
- Keep treatment-time expectations evidence-based. If your case presentations quote typical durations, do not adjust them on the strength of one trial.
- Refer rather than recommend. If a family asks whether their teen should take vitamin D to speed up braces, the accurate answer is that one recent study suggests a possible effect, the evidence is early, and the family physician or paediatrician is the right person to decide on supplementation.
- Watch for replication. A finding like this becomes clinically meaningful when independent groups reproduce it with larger samples, serum measures and placebo controls.
Pro Tip: Add a short line to your orthodontic intake form asking about vitamins and supplements, including dose. It takes the patient a moment and gives your team a clearer picture if bone-remodelling research like this matures.
Why is vitamin D studied in orthodontics at all?
Orthodontic tooth movement is understood to involve bone remodelling, and the trial's keywords place it in that area of research. As a general principle, nutrients and hormones involved in bone metabolism are natural candidates for researchers looking for biological ways to influence how fast teeth move. Other research has looked at mechanical and device-based approaches. For now, sound mechanics, good patient cooperation and careful case planning remain the foundations of treatment time.
The bottom line
The November 2026 trial by Sagar and colleagues reports a statistically significant reduction of about 1.69 months in orthodontic treatment time with oral vitamin D₃ in adolescents, along with higher salivary vitamin D₃ during space closure and at debonding. It is an interesting signal from a small study, and the authors are clear that more work is needed. Canadian dental professionals should treat it as a talking point backed by a citation, not a change to clinical protocol.
EBIKO Dental will continue monitoring orthodontic and bone-remodelling research and report on follow-up studies as they are published. For dental supplies shipped across Canada, visit ebiko.ca.
Sources
- Sagar S, Ramani P, Moses S, Jeyaraj G. Effect of oral vitamin D₃ supplementation on salivary vitamin D levels and orthodontic treatment duration: a randomized controlled trial. Clinical Oral Investigations. 2026;30(12). doi:10.1007/s00784-026-07254-3
- Europe PMC record (PMID 43007448): europepmc.org/article/MED/43007448
Frequently Asked Questions
Q: Does vitamin D make braces work faster?
One randomized trial published in November 2026 found that adolescents given oral vitamin D₃ finished fixed orthodontic treatment about 1.69 months sooner than an unsupplemented group. It was a small study of 52 patients, and the authors say further studies are required before routine clinical use.
Q: Should dentists recommend vitamin D supplements to orthodontic patients?
Not on the basis of this trial alone. The authors state that supplementation should be individualized and guided by clinical assessment, and supplementation decisions belong with the patient's physician. Dental teams can record supplement use in the medical history and refer questions to the family doctor.
Q: How was vitamin D measured in the orthodontic study?
The researchers measured vitamin D₃ in unstimulated saliva using ELISA at archwire insertion, extraction space closure and debonding. The abstract does not describe blood (serum) tests, which are commonly used to assess vitamin D status.