Patient SatisfactionNCT07208708
Patient Satisfaction With At-home Dental Bleaching Using Orthodontic Retainers With Different Margin Designs
A study testing Scalloped margin retainer and Straight orthodontic retainer in people with Patient Satisfaction and Bleaching Efficacy, run by Universidad Rey Juan Carlos at 1 site in Spain.
Trial summary
This randomized single-blind, split-mouth clinical trial evaluated patient satisfaction with at-home dental bleaching using orthodontic retainers with different margin designs, as well as bleaching efficacy, tooth sensitivity (TS), and gingival irritation (GI). Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Patient Satisfaction, Bleaching Efficacy, Tooth Sensitivity
- What is being tested?
- Scalloped margin retainer and Straight orthodontic retainer
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 40 participants
- Where
- 1 siteSpain
- Study dates
- 7 Apr 2025to 28 Jul 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Completed of orthodontic treatment with Invisalign aligners (Align Technology Inc., CA, USA); willingness to undergo tooth bleaching as a complementary procedure; and current use of clear retainers. Additional criteria included age of ≥18 years of age, good general and oral health, and provision of informed consent. Eligible participants also needed anterior teeth free from carious and periodontal disease, with canines of shade A2 or darker on the VITA Classical scale (VITA Zahnfabrik, Bad Säckingen, Germany) and a Whiteness Index for Dentistry (WID) value ≤15.
Who cannot join
- History of previous bleaching; self-reported tooth sensitivity; continuous use of analgesics or anti-inflammatory drugs; pregnancy or breastfeeding; and deleterious habits such as bruxism or smoking. Participants with anterior teeth presenting fixed orthodontic appliances, attachments, restorations, endodontic treatment, color changes due to tetracyclines or fluorosis, or visible enamel cracks were also excluded.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Patient Satisfaction With At-home Dental Bleaching Using Orthodontic Retainers With Different Margin Designs: a Randomized Equivalence Clinical Trial.
This randomized single-blind, split-mouth clinical trial evaluated patient satisfaction with at-home dental bleaching using orthodontic retainers with different margin designs, as well as bleaching efficacy, tooth sensitivity (TS), and gingival irritation (GI).
Read the detailed description
The objective of the study will be to clinically evaluate patient satisfaction, as well as the effectiveness of colour change, tooth sensitivity and gingival irritation with home whitening using 10% carbamide peroxide performed with orthodontic retainers with different cut-outs. Forty patients will be selected to receive home teeth whitening with a straight or scalloped retainer on each half-arch (n=40). The whitening procedure will be performed with 10% carbamide peroxide (Pola Night 10%) for 2 hours over 14 days. Patient satisfaction will be assessed weekly for two weeks through a series of questions using the Visual Analogue Scale (VAS 0-10). Colour will be assessed initially, weekly for two weeks and 1 month after completion of whitening, using the subjective VITA Classical scale, VITA Bleachedguide 3D-MASTER and the objective VITA Easyshade spectrophotometer. The intensity and risk of tooth sensitivity and gingival irritation will be recorded on the Visual Analogue Scale (VAS 0-10). Patient satisfaction will be assessed using the paired Student's t-test. The colour change between the groups will be compared using the paired Student's t-test. The absolute risk of tooth sensitivity and gingival irritation in both groups will be compared using the McNemar test. The intensity of tooth sensitivity and gingival irritation will be analysed using the Student's t-test for paired samples. The significance level will be 5% in all statistical tests.
- Being tested
- Scalloped margin retainer, Straight orthodontic retainer
- Keywords
- dental bleaching, color change, hydrogen peroxide, clinical trials
- Medical subject headings
- Patient Satisfaction, Dentin Sensitivity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Scalloped margin retainerOther
Patient satisfaction was assessed during 2 weeks of whitening with a scalloped orthodontic retainer. Colour change, TS and IG were also measured. No studies have evaluated the effect of different margin designs in orthodontic retainers used in for tooth bleaching. Therefore, the present study aimed to clinically assess the impact of scalloped and straight margin design in orthodontic retainers employed for at-home bleaching, considering patient satisfaction, bleaching efficacy, tooth sensitivity (TS), and gingival irritation (GI).
Straight orthodontic retainerOther
Patient satisfaction was assessed during two weeks of whitening with a straight orthodontic retainer. Colour change, TS and IG were also measured. No studies have evaluated the effect of different margin designs in orthodontic retainers used in for tooth bleaching. Therefore, the present study aimed to clinically assess the impact of scalloped and straight margin design in orthodontic retainers employed for at-home bleaching, considering patient satisfaction, bleaching efficacy, tooth sensitivity (TS), and gingival irritation (GI). The null hypotheses were that no significant differences would be observed in: (1) patient satisfaction, (2) bleaching efficacy, (3) tooth sensitivity, and (4) gingival irritation, when different margin designs are used in orthodontic retainers for at-home tooth bleaching.
| Study group | Role | What they receive |
|---|---|---|
| Scalloped margin retainer | Active comparator | Not described Receives: Other: Scalloped margin retainer |
| Straight margin retainer | Experimental | Not described Receives: Other: Straight orthodontic retainer |
What is being measured
The primary outcome is the main question the study is designed to answer.
Patient Satisfaction
Patient satisfaction was assessed daily using a Visual Analog Scale (VAS, 0-10) consisting of nine questions was provided to Participants completed a satisfaction diary independently throughout the 2-week bleaching period, without evaluator interference or time restrictions. The scale ranged from 0 (no problem/very good) to 10 (maximum problem/very bad), with participants marking a vertical line corresponding to their perception.
Measured: 2 weeks
Secondary outcomes (3)
Bleaching efficacy
Tooth color was evaluated at baseline and after treatment using both subjective and objective methods. Subjective evaluation was performed with the VITA Classical and VITA Bleachedguide 3D-MASTER shade guides. Objective evaluation was carried out with the VITA Easyshade spectrophotometer (Vita Zahnfabrik) using the CIELab* color system.
Measured: 2 weeks
Tooth sensitivity
Was assessed using a 10-point Visual Analog Scale (VAS), where 0 indicated no sensitivity and 10 indicated severe sensitivity
Measured: 2 weeks
Gingival irritation
Was assessed using the same methodology as TS, with VAS ranging from 0 (no irritation) to 10 (severe irritation)
Measured: 2 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Oct 2025
- Study start7 Apr 2025
- Primary completion9 Jun 2025
- Study completion28 Jul 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Patient SatisfactionStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Single group
- Masking
- Single blind
- Who is masked
- Investigator
- Enrolment
- 40 participants (actual)
Sponsor and investigators
- Lead sponsor
- Universidad Rey Juan Carlos
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Isabel Giráldez de Luis, Universidad Rey Juan Carlos
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07208708
- Sponsor's protocol ID
- URJC_IDIBO_4
- Status last verified
- Sep 2025
- First submitted
- 28 Sep 2025
- Last updated
- 6 Oct 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 6 Oct 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Patient Satisfaction With At-home Dental Bleaching Using Orthodontic Retainers With Different Margin Designs: a Randomized Equivalence Clinical Trial.
- ClinicalTrials.gov ID
- NCT07208708
- Acronym / sponsor ID
- URJC_IDIBO_4
- Keywords
- dental bleaching, color change, hydrogen peroxide, clinical trials
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 40 participants (actual)
- Lead sponsor
- Universidad Rey Juan CarlosUniversity, hospital or other
- Study start
- 7 Apr 2025 (actual)
- Primary completion
- 9 Jun 2025 (actual)
- Study completion
- 28 Jul 2025 (actual)
- First posted
- 6 Oct 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This randomized single-blind, split-mouth clinical trial evaluated patient satisfaction with at-home dental bleaching using orthodontic retainers with different margin designs, as well as bleaching efficacy, tooth sensitivity (TS), and gingival irritation (GI).
Detailed description
The objective of the study will be to clinically evaluate patient satisfaction, as well as the effectiveness of colour change, tooth sensitivity and gingival irritation with home whitening using 10% carbamide peroxide performed with orthodontic retainers with different cut-outs. Forty patients will be selected to receive home teeth whitening with a straight or scalloped retainer on each half-arch (n=40). The whitening procedure will be performed with 10% carbamide peroxide (Pola Night 10%) for 2 hours over 14 days. Patient satisfaction will be assessed weekly for two weeks through a series of questions using the Visual Analogue Scale (VAS 0-10). Colour will be assessed initially, weekly for two weeks and 1 month after completion of whitening, using the subjective VITA Classical scale, VITA Bleachedguide 3D-MASTER and the objective VITA Easyshade spectrophotometer. The intensity and risk of tooth sensitivity and gingival irritation will be recorded on the Visual Analogue Scale (VAS 0-10). Patient satisfaction will be assessed using the paired Student's t-test. The colour change between the groups will be compared using the paired Student's t-test. The absolute risk of tooth sensitivity and gingival irritation in both groups will be compared using the McNemar test. The intensity of tooth sensitivity and gingival irritation will be analysed using the Student's t-test for paired samples. The significance level will be 5% in all statistical tests.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Single group
- Masking
- Single blind (investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Scalloped margin retainer | Active comparator | Other: Scalloped margin retainer |
| Straight margin retainer | Experimental | Other: Straight orthodontic retainer |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Completed of orthodontic treatment with Invisalign aligners (Align Technology Inc., CA, USA); willingness to undergo tooth bleaching as a complementary procedure; and current use of clear retainers. Additional criteria included age of ≥18 years of age, good general and oral health, and provision of informed consent. Eligible participants also needed anterior teeth free from carious and periodontal disease, with canines of shade A2 or darker on the VITA Classical scale (VITA Zahnfabrik, Bad Säckingen, Germany) and a Whiteness Index for Dentistry (WID) value ≤15.
Key exclusion criteria (1 listed)
- History of previous bleaching; self-reported tooth sensitivity; continuous use of analgesics or anti-inflammatory drugs; pregnancy or breastfeeding; and deleterious habits such as bruxism or smoking. Participants with anterior teeth presenting fixed orthodontic appliances, attachments, restorations, endodontic treatment, color changes due to tetracyclines or fluorosis, or visible enamel cracks were also excluded.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Scalloped margin retainerPatient satisfaction was assessed during 2 weeks of whitening with a scalloped orthodontic retainer. Colour change, TS and IG were also measured. No studies have evaluated the effect of different margin designs in orthodontic retainers used in for tooth bleaching. Therefore, the present study aimed to clinically assess the impact of scalloped and straight margin design in orthodontic retainers employed for at-home bleaching, considering patient satisfaction, bleaching efficacy, tooth sensitivity (TS), and gingival irritation (GI). | Other | Scalloped margin retainer |
| Straight orthodontic retainerPatient satisfaction was assessed during two weeks of whitening with a straight orthodontic retainer. Colour change, TS and IG were also measured. No studies have evaluated the effect of different margin designs in orthodontic retainers used in for tooth bleaching. Therefore, the present study aimed to clinically assess the impact of scalloped and straight margin design in orthodontic retainers employed for at-home bleaching, considering patient satisfaction, bleaching efficacy, tooth sensitivity (TS), and gingival irritation (GI). The null hypotheses were that no significant differences would be observed in: (1) patient satisfaction, (2) bleaching efficacy, (3) tooth sensitivity, and (4) gingival irritation, when different margin designs are used in orthodontic retainers for at-home tooth bleaching. | Other | Straight margin retainer |
Primary outcome
Patient Satisfaction
Time frame: 2 weeks
Patient satisfaction was assessed daily using a Visual Analog Scale (VAS, 0-10) consisting of nine questions was provided to Participants completed a satisfaction diary independently throughout the 2-week bleaching period, without evaluator interference or time restrictions. The scale ranged from 0 (no problem/very good) to 10 (maximum problem/very bad), with participants marking a vertical line corresponding to their perception.
3 secondary outcomes
Bleaching efficacy
Time frame: 2 weeks
Tooth sensitivity
Time frame: 2 weeks
Gingival irritation
Time frame: 2 weeks
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 6 Oct 2025.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Scalloped margin retainer and Straight orthodontic retainer in people with Patient Satisfaction and Bleaching Efficacy, run by Universidad Rey Juan Carlos at 1 site in Spain.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 6 Oct 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Spain. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Patient Satisfaction (time frame: 2 weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Oct 2025.