Inclusion Criteria:  They should have an acceptable oral hygiene level.  Presence of at least two posterior carious lesions to be restored with two different types of composite. The two materials should be used in approximately the same sized lesions or within the same extension. Age range between 18 and 45 years. A good likelihood of recall availability.  Exclusion Criteria:  Severe or active periodontal or carious disease. Heavy bruxism or a traumatic occlusion. Patients with a compromised medical history or had received therapeutic irradiation to the head and neck region. Alcoholic and smoker patients. Patients had participated in a clinical trial within 6 months before commencement of this trial. Patients unable to return for recall appointment.