NCT07491536

Ozone Therapy With Biomimetic Oral Care for Cancer-Related Oral Mucositis

Combined Gas Ozone Therapy and Biomimetic Oral Care in the Management of Radio- and Chemotherapy-Induced Oral Mucositis: A Randomized Controlled Clinical Trial

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 50 (estimated)
• Sponsor: University of Pavia · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Oral mucositis is a frequent and often debilitating complication of radiotherapy and chemotherapy, particularly in patients treated for head and neck cancers. It is characterized by inflammation and ulceration of the oral mucosa, leading to pain, difficulty swallowing, taste disturbances, dry mouth, and impairment of daily activities. In more severe cases, oral mucositis may require modification or temporary interruption of cancer treatment. This randomized controlled clinical trial is designed to assess the clinical effectiveness of gas ozone therapy in patients with radio- and chemotherapy-induced oral mucositis. In addition, the study will evaluate whether combining ozone therapy with a structured biomimetic oral care regimen, including toothpaste and mouthwash, provides additional clinical benefit compared with ozone therapy alone. Eligible participants will be randomly assigned to one of two parallel groups. The control group will receive gas ozone therapy administered in an outpatient setting according to a standardized protocol. The experimental group will receive the same ozone therapy combined with a defined home oral care regimen. Each participant will be followed for 30 days. The primary outcome is the change in oral mucositis severity, assessed using the World Health Organization Oral Toxicity Scale. Secondary outcomes include oral pain intensity, salivary flow rates, perceived dry mouth, taste alterations, swallowing function, oral pH, overall oral health-related quality of life, and treatment tolerability. The findings of this study are expected to clarify the role of ozone-based supportive care strategies in the management of cancer therapy-related oral mucositis and to contribute to the development of standardized non-pharmacological treatment protocols.

Detailed description

Oral mucositis represents a clinically relevant toxicity associated with radiotherapy and chemotherapy, particularly in patients undergoing treatment for head and neck malignancies. The condition arises from a multifactorial biological process that includes epithelial injury, inflammatory cascade activation, oxidative stress imbalance, and subsequent disruption of mucosal integrity. The resulting ulcerative lesions are frequently associated with pain, impaired oral intake, dysphagia, taste alterations, and deterioration in oral health-related quality of life. In more severe cases, mucositis may interfere with adherence to oncologic treatment schedules. Although several supportive approaches have been proposed, there is currently no universally accepted non-pharmacological protocol capable of consistently reducing mucositis severity and improving functional outcomes. Medical ozone has been investigated in dentistry for its antimicrobial, anti-inflammatory, and tissue-regenerative properties. Experimental evidence suggests that controlled topical ozone exposure may enhance local oxygen metabolism, modulate inflammatory mediators, and promote mucosal repair. However, robust randomized clinical data evaluating standardized gas ozone protocols in patients with cancer therapy-induced oral mucositis remain limited. The present study is a monocentric, randomized, controlled, parallel-group clinical trial designed to assess the clinical effectiveness of gas ozone therapy administered using a certified medical device. The trial also aims to investigate whether the association of ozone therapy with a structured biomimetic oral care regimen provides additional benefit compared with ozone therapy alone. Eligible participants diagnosed with grade 1-3 oral mucositis will be randomized in a 1:1 ratio to receive either ozone therapy alone or ozone therapy combined with a defined home oral care protocol. Ozone applications will be performed in an outpatient clinical setting according to standardized parameters over a 30-day period. Participants allocated to the combined treatment arm will follow a structured domiciliary oral hygiene regimen throughout the study duration. Clinical evaluations and patient-reported outcome measures will be collected at predefined follow-up visits to monitor mucosal status, symptom progression, functional changes, and treatment tolerability. The study is designed to generate clinically applicable data regarding the role of ozone-based supportive care strategies in the management of radio- and chemotherapy-induced oral mucositis.

Conditions

• Oral Mucositis
• Chemotherapy-induced Oral Mucositis
• Head and Neck Neoplasms

Interventions

Type	Name	Description
DEVICE	Gas Ozone Therapy	Medical gas ozone will be administered in an outpatient clinical setting using a certified ozone delivery system. Prior to application, the affected oral mucosal areas will be gently dried. Ozone will be applied locally using a dedicated silicone applicator, with an exposure time of 60 seconds per cm² and a maximum of four sites treated per session at predefined device settings. Treatment sessions will be performed three times weekly during the first two weeks (days 1, 3, and 5), followed by twice-weekly sessions until day 30. All participants will receive standardized oral hygiene instructions and will use the same biomimetic toothpaste throughout the study period.
OTHER	Biomimetic Oral Care Regimen	Participants allocated to the experimental arm will use a biomimetic mouthwash in addition to the standardized gas ozone therapy protocol. The mouthwash will be applied twice daily, in the morning and evening, after routine oral hygiene procedures for 30 consecutive days. Adherence to the domiciliary regimen will be monitored using a structured patient diary.

Timeline

• Start date: 2026-03-01
• Primary completion: 2026-12-01
• Completion: 2026-12-15
• First posted: 2026-03-24
• Last updated: 2026-03-24

Locations

1 site across 1 country: Italy