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Ozone injection study: does concentration matter for knee pain?

NCT ID NCT07662512

Symptom relief Sponsor: Sakarya University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether a higher concentration of ozone injected into the knee works better than a lower concentration for treating osteoarthritis. 159 patients received one of two ozone strengths and were followed for 3 months. Researchers measured pain, stiffness, and daily function to see if concentration made a difference.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
ozone injection
What this could lead to
If successful, this could show that a specific ozone concentration provides better pain relief and function for people with knee osteoarthritis.
What could go wrong
This is a small, completed trial with only 3 months of follow-up. Results may not apply to all patients, and longer-term benefits or risks are unknown.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

159 people

The number who actually took part.

Started

May 2023

Finished

Jun 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

50 to 85 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patients aged 50-85 years with a diagnosis of primary knee osteoarthritis according to the American College of Rheumatology \[12\] criteria, symptomatic knee with KL \[13\] grades II, III and IV, who underwent intra-articular ozone treatment. Exclusion Criteria: * Patients with a history of any intra-articular injection within 3 months before the first ozone injection, a history of previous knee surgery, a diagnosis of malignancy, missing follow-up parameters, bilateral intra-articular knee ozone injection, a secondary knee osteoarthritis diagnosis (trauma, inflammatory joint disease, etc.), patients without demographic and clinical data, or direct radiographs.

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Conditions

The condition(s) this trial relates to.

osteoarthritis, knee

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Gonarthrosis Knee osteoarthristis

Contacts and locations

Locations

  • Sakarya University

    Adapazarı, Sakarya, 54010, Turkey (Türkiye)

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