Trial reportHead & face medicine2025
Effect of personality characteristics on perception of tooth whitening outcome in young adults in long-term: a randomised, double-blind, placebo controlled trial.
Trial report in Head & face medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. It is linked to trial NCT03380702 (Influence of Tooth Whitening on Changes in Quality of Life), which is not on this map. Cited by 2 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Influence of Tooth Whitening on Changes in Quality of Life: a Randomized Double-blinded Placebo-controlled Trial
Who cites it
2 citing papers in PubMed.
- Synthesis, characterization and evaluation of novel bleaching gels containing bioactive glass and nano-hydroxyapatite on hydrogen peroxide diffusion, bleaching efficacy and enamel protection.Clinical oral investigations · 2025Article
- Correction: Effect of personality characteristics on perception of tooth whitening outcome in young adults in long-term: a randomised, double-blind, placebo controlled trial.Head & face medicine · 2025Article
Corrections and comments
- Erratum issued
Authors and funding
5 authors.
Funding
Abstract
backgroundTooth whitening is a popular cosmetic procedure; however, its perceived effectiveness and long-term psychosocial impact remain underexplored. This study investigated perceptions of tooth color change and the associated psychological and social effects over a one-year period, with particular attention to the role of individual personality traits.
methodsFifty participants aged 19 to 28 were randomly assigned to either an experimental group or a control group. The experimental group received a light-activated whitening gel, while the control group received an inactive gel. Evaluations were conducted at baseline, one week post-treatment, and one year post-treatment. Tooth color was measured using spectrophotometry. Standardized questionnaires were employed to assess psychosocial effects and personality traits. Data were analyzed using analysis of variance with Bonferroni post hoc tests and independent samples t-tests.
resultsThe experimental group showed a significantly greater improvement in tooth color shortly after treatment compared to the control group. Although this improvement diminished over time, it remained above baseline levels at the one-year follow-up. In the short term, participants in the experimental group reported reduced psychological and social concerns, while the control group reported a decrease in psychological impact only. After one year, the experimental group experienced a return of psychosocial concerns, whereas the control group continued to report improvements. Personality traits influenced these outcomes: lower neuroticism and higher perfectionism were associated with enhanced short-term benefits, while higher conscientiousness was linked to more sustained long-term improvements.
conclusionsParticipants demonstrated limited ability to accurately perceive improvements in tooth color, often noticing relapse over time. The psychosocial impact of tooth whitening was influenced by personality traits, highlighting the importance of a personalized approach in cosmetic dental treatments. Practitioners should consider individual psychological profiles when managing patient expectations.
trial registrationThis clinical trial was prospectively registered with ClinicalTrials.gov (Identifier NCT03380702) on December 21, 2017.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.