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Completed

NCT Number: NCT05635253

Influence of Polishing After Bleaching on Color Change and Enamel Morphology

This trial evaluated the influence of polishing on enamel color change after in-office bleaching treatment. It also evaluated the influence of polishing on tooth morphology and sensitivity.

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Key information

Conditions

Tooth Discoloration Dentin Sensitivity Morphologic Change Stomatognathic Diseases Tooth Diseases Tooth Sensitivity

Age range

18 year–30 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Cecy Martins Silva

Belém, Pará, 66075-110, Brazil

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Individuals aged 18 to 30 years old of both sexes;
  • With good oral hygiene;
  • With no sensitivity to tactile and evaporative stimuli;
  • Who have not undergone previous bleaching treatment, and with no caries lesions.

Exclusion criteria

  • patients undergoing fixed orthodontic treatment;
  • patients allergic to the bleaching product;
  • drug users or pregnant women;
  • patients with carious lesions, defective restorations and/or periodontal disease, patients with systemic diseases, pulpitis or patients using analgesics.

Treatment and study plan

Hydrogen Peroxide 35%

Other

Group that received only bleaching treatment. Soft tissue protection was performed with a Top Dam light-curing gingival barrier (FGM, Santa Catarina, SC, Brazil). Application of whitening gel (Whitness HP 35%/FGM) on the buccal surface from premolar to premolar in the upper and lower arches. Three 45-minute sessions were held with an interval of seven days between them.

Hydrogen Peroxide 35% + Polishing whitened teeth

Other

Group that received only bleaching treatment followed by polishing. Soft tissue protection was performed with a Top Dam light-curing gingival barrier (FGM, Santa Catarina, SC, Brazil). Application of whitening gel (Whitness HP 35%/FGM) on the buccal surface from premolar to premolar in the upper and lower arches. Three 45-minute sessions were held with an interval of seven days between them. After bleaching, the vestibular surfaces were polished for 20s on each bleached tooth, with polishing paste and felt disc (Diamond Flex, FGM, Santa Catarina, SC, Brazil) in low rotation.

Primary outcomes

  1. Influence of polishing on color after tooth whitening

    Time frame: 14 days

    Color evaluation was performed with the EasyshadeAdvanced spectrophotometer (Vita-Zahnfabrik, GE, Germany)

Secondary outcomes

  1. Surface morphology of whitening enamel with and without polishing

    Time frame: 14 days

    The images were obtained using a electron microscope (Mira3 model) with type electron gun, mounted on supports of aluminum with 12mm of diameter, using tape double adhesive carbon face, and metallic with Au for 2'30'' which deposits about the sample a film thick average of 10 to 15nm. The images were generated by detecting secondary electrons, using a voltage acceleration of 5 kV and a working distance of around 15 mm.

  2. Influence of polishing on sensitivity after tooth whitening

    Time frame: 14 days

    assessment of sensitivity during treatment using a visual analogue scale with values from 0 to 10, with higher values indicating a worse level of pain.

Sponsors and collaborators

Lead sponsor

Universidade Federal do Para

Other

Registry information

Official study title

Influence of Polishing After Bleaching on Color Change and Enamel Morphology: Randomized Clinical Trial

Important dates

Study start
2022
Primary completion
2022
Study completion
2022
First posted
Dec 2, 2022
Registry last updated
Dec 2, 2022

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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