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

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.

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

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).