A Minimally invasive esthetic restorative approach with the advancement of highly translucent multilayered monolithic zirconia ceramic can provide minimal thickness that affords high strength and esthetics without the need for layering porcelain. The effect of sintering conditions on yttria-partially stabilized zirconia is essential for the long-term success of such restorations.

The study aims to evaluate the clinical performance of speed and conventional sintering on ultra-thin, highly translucent, multilayered zirconia laminate restorations with minimum invasive tooth preparation.

Inclusion Criteria:

• patients able to understand and sign the informed consent form.
• physically and psychologically able to undergo conventional restorative procedures.
• Good oral hygiene with no signs of periapical pathology or periodontal disease. (periodontal screening index 0-1).
• Slight malposition.
• Teeth with spacing.
• Teeth with discoloration.
• Patient having natural teeth as opposing dentition

Exclusion Criteria:

• Insufficient surface enamel (60%).
• Abutments with subgingival restorations or root caries.
• Parafunctional habits.
• Lack of opposite occluding dentition in the area intended for restoration.
• mandibular prognathism and maxillary retrognathism