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Dental Ozone Protocol: Tooth Decay and Sensitivity
Settings published human studies used for gas on tooth decay, dentin hypersensitivity, bleaching sensitivity and white-spot prevention, by device family.
Quick answer: For tooth decay, published human studies used a sealed cup for 20–60 s per tooth at 2,100–2,350 ppm. For dentin sensitivity they used 30 s once, and for bleaching sensitivity 60 s per tooth.
Warning
Requires training in ozone dentistry
Dental ozone should only be performed by a dental professional trained in ozone dentistry. Gas applied in the mouth carries a higher risk of breathing ozone, which is why devices seal over the tooth and use suction (vacuum) to pull the gas away. Never let the patient inhale ozone gas.
This sheet summarizes what published human studies used. It is not a self-treatment guide and not medical advice. Settings are printed as each study reported them, by device family, and cannot be compared across devices.
What are the basics of ozone for tooth decay and sensitivity?
- Single-tooth uses are where dental gas has the most favorable studies: tooth decay, dentin hypersensitivity and sensitivity after bleaching, mostly with sealed-cup or timed-burst devices. Most trials are small and gave the gas once, so it is a quick chairside step. A few trials used repeat visits (see the table).
- For decay the aim is to disinfect the lesion. In the trials the sealed cup was placed over the lesion and gas ran for 20 to 60 seconds per tooth, usually once.
- For sensitivity the studies used 30 seconds with a sealed cup, or a 12-second burst per tooth at the first visit and again 3 months later with a timed-burst handpiece. After bleaching, 60 seconds per tooth with a sealed cup, given after the peroxide gel was washed off (or before it).
Strongest of the dental uses, but each study used its own device and setting.
What dose and settings are used for ozone for tooth decay and sensitivity?
One row per use. Settings are exactly as the studies printed them; "not stated" means the paper did not give it.
| Device family | Setting as printed | Time and schedule | |
|---|---|---|---|
| Tooth decay | Sealed-cup (vacuum) device | 2,100–2,350 ppm at 615 cc/min (cubic centimeters of gas per minute); one trial: 32 g/m³ | 20–60 s per tooth, usually 1 application. One trial: 4 sessions of 40 s. |
| Tooth decay (programme) | High-frequency tip generator | Power setting not stated | 5 min per session at the first visit, then at 2, 4 and 6 months (4 sessions) |
| Dentin hypersensitivity | Sealed-cup (vacuum) device | 32 g/m³ | 30 s, single application |
| Dentin hypersensitivity | Timed-burst handpiece | Preset dose, set by seconds (dose not stated) | 12 s per tooth, 2 sessions 3 months apart |
| Sensitivity after bleaching, or before bleaching | Sealed-cup (vacuum) device | 2,350 ppm at 615 cc/min | 60 s per tooth, 1 session, after the peroxide gel is washed off (or before it) |
| White-spot prevention with braces | High-frequency tip generator | About 0.97 ppm in the mouth (full-mouth programme) | 5 min every 4 weeks |
Madrid's dental addendum: After caries removal, Madrid (sections 4.1 and 4.1.1) disinfects with a silicone cup at 40–60 µg/mL for 40–60 seconds, and prepares enamel before preventive work at 60 µg/mL for 40 seconds. For dentin hypersensitivity not linked to decay (section 5) it applies gas at 40–80 µg/mL. Madrid calls these ranges, not a strict protocol. Device settings in the table (ppm, power level, seconds) are not directly comparable to Madrid's µg/mL values.
Dose per tooth is time-based, so plan chair time as seconds per tooth times the number of teeth treated.
Unit key: 1 g/m³ equals 1 µg/mL. 2,100 ppm is about 4.2 µg/mL and 2,350 ppm about 4.7 µg/mL. Power levels and percent settings have no µg/mL value. The 32 g/m³ papers used about 7 times the strength of the 2,100–2,350 ppm papers, so they are not the same setting.
What are the best tips when using ozone for tooth decay and sensitivity?
- For sensitivity after bleaching, timing mattered in one trial that compared ozone before and after the peroxide gel: sensitivity was lowest when ozone was given after.
- For decay, trials using 20 seconds and trials using 60 seconds per tooth both leaned toward ozone.
- Settings are device-specific (ppm, power level, seconds). Use your own device's program and do not convert one family's setting into another's.
- Most single-tooth uses were one application. Where the studies gave a schedule, it is in the table.
What are the precautions for ozone for tooth decay and sensitivity, and who should avoid it?
- Sealed-cup vacuum and the pulp. In a 50-tooth case series of deep decay in primary teeth, the authors suggest the cup's vacuum may have drawn pulp tissue in 4 teeth where little dentin was left; those teeth later developed a fistula (a small drainage channel) and needed root canal treatment (Eur J Paediatr Dent 2017). Weigh this before placing a cup over a lesion close to the pulp.
- Device families used in this sheet (generic descriptions). Sealed-cup (vacuum) device: a silicone cup seals over the tooth and holds a vacuum. Probe-tip device: a handpiece with a tip, usually a fixed concentration or a power level. High-frequency tip generator: ozone is made at the tip and set by power percent. Timed-burst handpiece: a preset dose set by seconds. Medical generator: a standard medical ozone generator giving a dose in µg/mL, with a syringe or custom sealed tray.
- Use high-volume suction or an ozone destruct unit at the mouth, and ventilate the room.
- Screen the patient first. Review pregnancy, heart or bleeding conditions and blood thinners with the patient's physician before gas is used.
- The Madrid Declaration on Ozone Therapy, 4th edition (ISCO3, 2025) dentistry addendum (Addendum A, section 2.1) sets the safety rules for gas in the mouth: stop at the first smell of ozone and check for leaks; use the dental unit's high-volume suction even when the handpiece has its own suction line; seal custom trays at every edge and test the seal before use; and keep 1 g of vitamin C and medical oxygen with a mask (3 L/min) in the office in case the patient breathes in ozone. For cup or tray gas on tooth surfaces (section 4.1), Madrid lists as contraindications: a tooth or mouth shape that stops a full seal, no high-volume suction, and a tooth with an apical lesion (endodontic treatment or extraction fits better). The full contraindication list in section 2.1 of the main text is written for ozone given through the body. How MediSkill handles contraindications is explained in the contraindications article.
- Use medical oxygen to make the gas. Madrid says generators that run on room air also make harmful nitrogen compounds, and industrial oxygen must not be used. Many of the dental studies here used such devices, so their settings may not match a medical-oxygen generator. Madrid's dentistry addendum allows an oxygen concentrator of 95% or higher purity for topical dental use and calls for medical-grade oxygen (99.9%) for any injection. MediSkill's rule is medical oxygen.
- Check your licensing board and that your device is cleared for dental use where you practice.
More detail
Equipment
- Dental ozone device for the family you use (sealed cup, timed-burst handpiece or tip generator), with matching cups or tips
- Suction or an ozone destruct unit at the mouth
- Isolation as for any restorative procedure
What the studies used
Study doses are listed as printed in each paper. They are not Madrid dosing; see the Madrid line under the dosing table. "RCT" means randomized controlled trial (people were assigned to groups by chance).
- Decay, sealed cup, 20 s at 2,350 ppm: RCT of 84, favors ozone (Sci Rep 2021).
- Decay, sealed cup, 60 s: non-randomized controlled study of 75, favors ozone (Libonati 2019).
- Decay, sealed cup, 40 s four times: RCT of 40, partly favors ozone (Atabek 2011). A 40-second trial of 42 did not report a direction (Yazıcıoğlu 2014).
- Decay, case series of 50 at 60 s, including the pulp-tissue event above (Eur J Paediatr Dent 2017).
- Decay, 5-minute programme over 6 months: RCT of 92, favors ozone (Sci Rep 2020).
- Dentin hypersensitivity, sealed cup 30 s: RCT of 44, favors ozone, but it is a preprint (Preprint 2023). Timed burst 12 s twice: RCT of 26, trend favors ozone (Open Dent J 2017).
- Sensitivity after bleaching, 60 s: RCT of 80, favors ozone (Bin Hassan 2024). An RCT of 45 comparing ozone before and after the gel was mixed, lowest sensitivity with ozone after (Al-Omiri 2018).
- White-spot prevention, full-mouth programme: RCT of 150 comparing it with fluoride varnish and octenidine. Our study summary marks the ozone verdict as not tested (Sci Rep 2022).
Evidence is thin for hypersensitivity (26 and 44 people, one a preprint) and for white-spot prevention (ozone arm not separately tested). Decay and bleaching sensitivity have more RCTs but short follow-up and different devices, so settings cannot be pooled.
Learn more
Background, benefits and research on dental ozone: Ozone in dentistry, full article.
Related protocols: Dental Ozone Protocol: Gum Disease, Peri-Implantitis and Implant Stability, Dental Ozone Protocol: Oral Surgery and Healing, Dental Ozone Protocol: Root Canal Disinfection and Pulp Capping.
Other dental protocols
For licensed practitioners. Educational reference only, not medical advice. Follow your scope of practice and local regulations.