- ICH GCP
- US Clinical Trials Registry
- Klinisk utprøving NCT07560761
Contribution of a* to Dental Bleaching After Combined Dental Bleaching
Contribution of the a* Parameter to Dental Bleaching After Combined Bleaching: A Prospective Non-randomized Single-arm Interventional Clinical Study
Studieoversikt
Status
Forhold
Intervensjon / Behandling
Detaljert beskrivelse
Tooth whitening is one of the most commonly requested aesthetic dental treatments, requiring objective and reproducible methods to quantify color changes. The CIELab color system (L*, a*, b*) and the Whiteness Index for Dentistry (WID) are widely used for this purpose.
While increases in L* and decreases in b* are recognized as the main contributors to dental whitening, the role of the a* parameter remains unclear. Variations in a*, including the presence of negative values or changes in sign during treatment, have been insufficiently studied.
A prospective, non-randomized, single-arm interventional clinical study with a before-after design will be conducted to evaluate changes in L*, a*, b*, and WID following a combined dental bleaching protocol consisting of an in-office phase with hydrogen peroxide and an at-home phase with carbamide peroxide.
Spectrophotometric measurements will be performed at baseline, after the in-office phase, and after completion of the at-home phase. The study will also analyze the relationship between changes in CIELab parameters and WID.
The study will be conducted in accordance with ethical standards and will be approved by the corresponding institutional review board. All participants will provide written informed consent prior to inclusion.
Studietype
Registrering (Antatt)
Fase
- Ikke aktuelt
Kontakter og plasseringer
Studiekontakt
- Navn: José Amengual-Lorenzo, PhD
- Telefonnummer: +34616941167
- E-post: jose.amengual@uv.es
Studer Kontakt Backup
- Navn: Rubén Agustín Panadero, MSc; Phd
- Telefonnummer: +34653098901
- E-post: ruben.agustin@uv.es
Studiesteder
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Valencia
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Valencia, Valencia, Spania, 46010
- University of Valencia
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Ta kontakt med:
- José Amengual Lorenzo, Phd
- Telefonnummer: +34616941167
- E-post: jose.amengual@uv.es
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Ta kontakt med:
- Rubén Agustín-Panader, MsC; PhD
- Telefonnummer: +34653098901
- E-post: ruben.agustin@uv.es
-
Hovedetterforsker:
- José Amengual-Lorenzo, PhD
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Deltakelseskriterier
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
- Voksen
- Eldre voksen
Tar imot friske frivillige
Beskrivelse
Inclusion Criteria
- Age 18 to 65 years
- Good oral health
- Presence of natural anterior teeth (incisors, canines, premolars)
- Anterior teeth without restorations
- Indication for tooth bleaching treatment
- Ability to comply with study procedures and visits
Exclusion Criteria
- Smoking
- Previous tooth bleaching treatment
- Pregnancy
- Breastfeeding
- Restorations in anterior teeth
- Presence of diseases affecting tooth color
- Conditions that may interfere with study outcomes
Studieplan
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Behandling
- Tildeling: N/A
- Intervensjonsmodell: Enkeltgruppeoppdrag
- Masking: Ingen (Open Label)
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
|---|---|
|
Eksperimentell: Combined Dental Bleaching
Participants will undergo a combined dental bleaching treatment consisting of an in-office phase followed by an at-home phase using custom trays.
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The intervention consists of an in-office bleaching phase with two 20-minute applications of 40% hydrogen peroxide, followed by an at-home bleaching phase using 16% carbamide peroxide applied with custom trays for 90 minutes daily.
Treatment will continue until color stabilization is achieved, defined as a change in WID of less than 2.6 units between two consecutive weekly measurements.
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Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Change in Whiteness Index for Dentistry (WID)
Tidsramme: From baseline to end of treatment (up to 12 weeks).
|
Change in WID values calculated from CIELab parameters (L*, a*, b*) between baseline and the end of treatment (up to 12 weeks).
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From baseline to end of treatment (up to 12 weeks).
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Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Change in L* parameter
Tidsramme: Baseline to end of treatment (up to 12 weeks).
|
Difference in L* values between baseline and the end of treatment (up to 12 weeks) measured using spectrophotometry.
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Baseline to end of treatment (up to 12 weeks).
|
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Change in a* parameter
Tidsramme: Baseline to end of treatment (up to 12 weeks).
|
Difference in a* values between baseline and the end of treatment (up to 12 weeks), including assessment of sign changes.
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Baseline to end of treatment (up to 12 weeks).
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Change in b* parameter
Tidsramme: Baseline to end of treatment (up to 12 weeks)
|
Difference in b* values between baseline and the end of treatment (up to 12 weeks), measured using spectrophotometry.
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Baseline to end of treatment (up to 12 weeks)
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Correlation between WID and CIELab parameters
Tidsramme: At end of treatment (up to 12 weeks).
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Assessment of the relationship between changes in WID and changes in L*, a*, and b*.
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At end of treatment (up to 12 weeks).
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Samarbeidspartnere og etterforskere
Sponsor
Etterforskere
- Hovedetterforsker: José Amengual-Lorenzo, University of Valencia
Publikasjoner og nyttige lenker
Studierekorddatoer
Studer hoveddatoer
Studiestart (Antatt)
Primær fullføring (Antatt)
Studiet fullført (Antatt)
Datoer for studieregistrering
Først innsendt
Først innsendt som oppfylte QC-kriteriene
Først lagt ut (Faktiske)
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Sist bekreftet
Mer informasjon
Begreper knyttet til denne studien
Andre studie-ID-numre
- Bleaching_aStar_WID_2026
- Application Reference 2026-ODO (Annen identifikator: Ethics Committee University of Valencia)
Plan for individuelle deltakerdata (IPD)
Planlegger du å dele individuelle deltakerdata (IPD)?
IPD-planbeskrivelse
Legemiddel- og utstyrsinformasjon, studiedokumenter
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