Bleaching Effect and Postoperative Sensitivity of Strawberry Extract
Conditions
Brief summary
with limited evidence based information in literature about using Strawberry extract for teeth bleaching in patients with extrinsic staining , it is beneficial to evaluate this new material using a randomized controlled clinical trial to test the null hypothesis that this extract will have the same effect as Hydrogen peroxide regarding the bleaching effect and hypersensitivity.
Detailed description
The whitening effect of strawberry is due to the presence of malic acid, which acts as a natural astringent to remove surface discoloration. The ellagic acid content in strawberry is ranging from 0.43 to 4.64 mg/g dry weight. The more amount of ellagic acid will produce more potential OH clusters as a powerful oxidizer thus make the more effective bleaching process. Ellagic acid releases the OH and H radicals which will react with the tooth enamel organic molecules and disrupt the electron conjugation, as well as changing the energy absorption in the tooth enamel organic molecules to form smaller organic molecules with a lighter color. Ellagic acid has an OH cluster, not COOH cluster like any other acids. The electronegativity of the OH group will be easier to break and react with the organic molecules of tooth enamel.
Interventions
OTHERstrawberry extract.
strawberry has a whitening effect due to its content of ellagic and maleic acids. the presence of acidic components namely ascorbic acid may increase the surface energy by removing the surface debris, thereby allowing the citric and maleic acids to penetrate into tooth surface to remove the surface stains.
Sponsors
Cairo University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
Participant inclusion criteria: 1. At least 18 years old. 2. Good general and oral health. 3. six present maxillary anterior teeth. Tooth inclusion criteria: 1. yellowing of teeth due to age. 2. stains due to coffee or tea. 3. light tetracycline stain. *
Exclusion criteria
participant
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Bleaching effect of strawberry extract versus Hydrogen peroxide. | immediately , one week and one month after application. | objective assessment for the bleaching effect by spectrophotometer. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| post operative sensitivity. | immediately after bleaching agent removal , 24 hours after application. | Tooth sensitivity is scored according to the VRS verbal Rating scale, where 0=none, 1=mild, 2=moderate, 3=considerable, and 4=severe |
Outcome results
None listed