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Trial record 30 of 32 for:    FLUORIDE ION AND NITRATE ION

Copmere Between Bleaching and Laminate Veneers

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03621163
Recruitment Status : Not yet recruiting
First Posted : August 8, 2018
Last Update Posted : August 8, 2018
Information provided by (Responsible Party):
Hazim sherif ahmed, Cairo University

Brief Summary:
The present study is aimed to evaluation of shade for clinical color change of discolored teeth treated by bleaching vs laminate veneers.

Condition or disease Intervention/treatment Phase
Discoloration, Tooth Procedure: Bleaching agent ( BOOST 40%) Procedure: laminate veneers(lithium-silicate) Not Applicable

Detailed Description:

Dental aesthetics, including tooth color, is of great importance for majority of the people and any discoloration or staining can affect their quality of life negatively1,2. In the UK it has been reported that 28% of grownups are dissatisfied with the appearance of their teeth and in the USA that 34% of grownups population are dissatisfied with their current tooth color. Moreover, in a survey of 3215 subjects from the UK 50% have admitted that they had some kind of tooth discoloration3,4.

Tooth bleaching has become one of the most popular aesthetic dental treatments. Because tooth bleaching is an effective, non-invasive procedure for the change of tooth discoloration, it is the best of treatment options for improving teeth color 5.

Ceramic restorations with excellent biocompatibility are widely used to achieve highly aesthetic characteristics in fixed prosthodontics6. Porcelain laminate veneers have become a popular method of treated tooth discoloration. But are expensive, brittle and difficult to repair7.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 1 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: split mouth randomized control, co-supervisor will write number for each member in each group (left side treatment A, right side treatment B or left side treatment B, right side treatment A) by indispensible pen on large white paper sheet. The sheet will be folded eight times and saved inside opaque well sealed envelope in which the inner content cannot be seen by naked eyes.
Masking: Single (Outcomes Assessor)
Masking Description:

Single blinded (outcome assessor). Assessors supervisor and co-supervisor will be blinded to the assigned material. However the operator and patient can't be blinded due to the difference in preparation and shade of the ceramic materials and bleaching agent.

  • The assessors will assess all outcomes blinded to the material assigned for each patient.
  • Three spectrophotometer measurements will be recorded each time, with the active point of the instrument focused on the cervical third of each tooth, then mean color from three measurements will be calculated.
  • Digital photograph measures the color of teeth based on the Adobe Photoshop software. (Version 5.5).
Primary Purpose: Treatment
Official Title: Shade Evaluation for Clinical Color Change of Discolored Teeth Treated by Bleaching vs Laminate Veneers.
Estimated Study Start Date : December 5, 2018
Estimated Primary Completion Date : September 5, 2019
Estimated Study Completion Date : December 20, 2019

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: bleaching agent
intervention : bleaching agent ( Boost 40%)
Procedure: Bleaching agent ( BOOST 40%)
Opalescence Boost 40% is a 40% hydrogen peroxide, medical power bleaching gel. The jet mix syringe ensures freshness for each application and precise dosing of the activator. One barrel contains a unique chemical activation with sodium fluoride and potassium nitrate, which have been demonstrated to reduce caries susceptibility, lower sensitivity, and improve enamel micro-hardness. The other barrel contains the concentrated hydrogen peroxide. When mixed, Opalescence Boost results in a 1.1% fluoride and 3% potassium nitrate concentration.

Active Comparator: laminate veneers
laminate veneers ( monolithic lithium - silicate)
Procedure: laminate veneers(lithium-silicate)
A lithium-silicate glass ceramic is newly introduced to the market. After crystallization, it demonstrates an ideal combination of strength, aesthetics and translucency that mirrors the vitality of natural teeth for fabrication of full anatomic anterior and posterior crowns. It differentiated from other ceramics by its high chipping resistance, due to their monolithic composition and average flexural strength of 385 MPa. Also Milling Block has good wear resistance due to the high content of ultra-fine nano-meter size crystalline structure. Lithium-silicates ceramic blocks are available in the commonly used VITA Classical and Chromascop Bleach shades.

Primary Outcome Measures :
  1. Color change. [ Time Frame: 1-4 weeks ]
    measures the change of color before and after intervention by Easy Shade Spectrophotometry

Secondary Outcome Measures :
  1. Corresponding color with comparator. [ Time Frame: 1-4 weeks ]
    by Digital photographs

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 40 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Patients included in this clinical trial :

    • Men and women between 15and 40 years of age.
    • Had good general and oral health.
    • The participants needed to have six vital maxillary or mandibular anterior teeth without caries lesions or restorations.
    • The maxillary canine was shade A3 or darker as judged by comparison with a shade guide (VITA Classical Shade Guide or Spectrophotometer measurement ).

Exclusion Criteria:

  • Participants were excluded from the study

    • If they presented with anterior restorations; had bruxism habits.
    • Were pregnant/lactating; presented with non vital tooth discoloration.
    • were taking any drug with anti-inflammatory, analgesic, or antioxidant effect; or presented with recession and dentin exposure

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03621163

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Contact: hazim sharif, MSc 00201127260517
Contact: omima el mahallwi, prof 00201222154399

Sponsors and Collaborators
Cairo University

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Responsible Party: Hazim sherif ahmed, Dentist, Cairo University Identifier: NCT03621163     History of Changes
Other Study ID Numbers: DTB&V
First Posted: August 8, 2018    Key Record Dates
Last Update Posted: August 8, 2018
Last Verified: August 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Hazim sherif ahmed, Cairo University:
bleaching agent
Additional relevant MeSH terms:
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Tooth Discoloration
Tooth Diseases
Stomatognathic Diseases
Lithium Carbonate
Antidepressive Agents
Psychotropic Drugs
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Antimanic Agents
Tranquilizing Agents
Central Nervous System Depressants
Physiological Effects of Drugs