The aim of the study is to determine whether Yttria stabilized multilayered zirconia restorations will differ from lithium disilicate restorations in shade matching and patient satisfaction in patients requiring full coverage restorations.
Age range of the patients from 20-60 years old; able to read and sign the informed consent document, illiterate patient will be avoided.
Patients able physically and psychologically to tolerate conventional restorative procedures.
Patients with no active periodontal or pulpal diseases, having teeth with good restorations.
Patients with teeth problems indicated for full coverage restoration (coronal fracture where partial coverage would lack retention, malposed or malformed teeth).
Patients in the growth stage with partially erupted teeth.
Patients with poor oral hygiene and motivation.
Patients with psychiatric problems or unrealistic expectations (patient that has phobia from dental treatments or needle bunch).
Patients suffer from parafunctional habits.