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CompletedNCT03534115Updated May 23, 2018

NAC Prevents Toxicity of Teeth Bleaching

An Early Phase 1 interventional study of NAC and Placebo in Removal of Toxicity From Dental Bleaching, sponsored by University of California, Los Angeles. Completed. Open to participants aged 18 Years to 90 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-05-23.

Sponsored by University of California, Los Angeles · Early Phase 1, Interventional, and Prevention

From the registry’s dates

  • Registered 3 years 5 months after the study started (first participant enrolled Dec 2014, registered May 2018).
Phase
Early Phase 1
Study type
Interventional
Enrollment
41
Allocation
Randomized
Ages
18 Years to 90 Years
Sex
All
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Study summary

Dental bleaching is a simple procedure for aesthetic restoration of vital and non-vital discolored teeth. Nevertheless, a number of studies conducted previously demonstrated the risk of tissue damage from contact of these agents with the oral mucosa along with their possible genotoxic potential after exposure to oral mucosa. Hence the aim of this study is to conduct a human clinical trial to incorporate the chemoprotectant N-acetyl cysteine (NAC) in the procedure of bleaching which could safely be used to eliminate the toxicity of bleaching materials leaving their esthetic benefits intact. 30-40 human subjects will be recruited and bleaching will be done at the UCLA School of Dentistry dental clinic.

02

Conditions studied

  • Removal of Toxicity From Dental Bleaching

Keywords

  • bleaching, toxicity, NAC
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In context

Lead sponsor

University of California, Los Angeles is the lead sponsor of 1,142 studies on the registry; 192 are open to participants now.

Of its 91 completed or terminated interventional studies of FDA-regulated products, 66 (73%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 90 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Subjects will be self reported as healthy individuals with no significant medical issues.

Exclusion criteria

Exclusion Criteria:

  • Self-report of present medical history (determined by the primary care doctors) of donors for:
  • Pregnancy
  • HIV-seropositivity and AIDS because the study is designed to evaluate the effect of NAC in general population with no underlying immunological deficiencies or general pathologies which may result in confounding effect in the outcome. Since this is a small study we are limiting the procedure to healthy individuals with no known underlying pathologies.
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Study design

Phase
Early Phase 1
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Investigator)
Enrollment
41 participants (actual)

Study arms

  • Placebo comparator
    Placebo

    Placebo was prepared by using the same solution containing buffers that were used in the preparation of NAC solution, except it did not contain NAC

    Dietary Supplement: Placebo

  • Experimental
    Experimental Arm

    solution containing NAC with buffers

    Dietary Supplement: NAC

Interventions

  • Dietary supplementNAC

    solution containing NAC

  • Dietary supplementPlacebo

    Placebo

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What researchers measure

Primary outcomes

  1. inhibition of pain

    Patients self report of pain on a 0-10 pain scale with 10 being the highest for mean pain levels and 0-5 pain scale with 5 being the highest for resting pain levels.

    Time frame: 3 weeks

Secondary outcomes

  1. white lesion in gingiva

    number and extend of white lesions in gingiva

    Time frame: 3 weeks

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Study locations

No study locations are listed for this record.

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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 23, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03534115
Lead sponsor
University of California, Los Angeles
Responsible party
Anahid Jewett (Principal Investigator, University of California, Los Angeles) — Principal investigator
First posted
May 23, 2018
Start date
Dec 4, 2014
Primary completion
Oct 26, 2017
Completion
Oct 26, 2017
Last update
May 23, 2018

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in May 2018. You cannot join it, but the record below documents what was studied.

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