The goal of this clinical study is to compare the clinical performance of a new 2-steps universal adhesive in patients with non-carious cervical lesions. The main question it aims to answer is: Is there any difference in clinical performance of a new 2-steps universal adhesives bonded with different etching strategies.

Participants will have restorations using a new 2-steps universal adhesives in different etching strategies.

• etch-and-rinse
• selective enamel etching
• self-etch

Inclusion Criteria:

• Available for follow-up visits
• Have at least 28 teeth/ 20 teeth under occlusion
• Have at least 3 non-carious cervical lesions without peri-apical lesion. The lesion is not nearly exposed pulp and no history of previous restoration.

Exclusion Criteria:

• Rampant / uncontrolled caries
• Advanced untreated periodontal disease
• >2 cigarette packs/day
• Systemic or local disorders that could not undergo dental procedures
• Xerostomia
• Severe bruxism, clenching, TMD
• Pregnancy at the time of screening
• Known history of sensitivity to resin or related materials
• Fixed orthodontic appliance or planning to have orthodontic treatment within 3 years