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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Placebo | Placebo Comparator | 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 |
|
| Experimental Arm | Experimental | solution containing NAC with buffers |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| NAC | Dietary Supplement | solution containing NAC |
| |
| Placebo |
| Measure | Description | Time Frame |
|---|---|---|
| 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. | 3 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| white lesion in gingiva | number and extend of white lesions in gingiva | 3 weeks |
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Inclusion Criteria:
Exclusion Criteria:
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the investigators, clinical staff and patients were blinded. The main solution containing NAC or the placebo was marked by A and B.
| Dietary Supplement |
Placebo |
|