Composite resins, or tooth-colored fillings, provide good durability and resistance to fracture in small- to mid-size fillings that need to withstand moderate pressure from the constant stress of chewing. They can be used on either front or back teeth. They are a good choice for people who prefer that their fillings look more natural. Source
Note: A Non-Carious Cervical Lesion when the hard dental tissue near the gumlines deteriorates significationly and leaves the tooth grooved narrowed because of missing tooth enamel.