Posterior composites, because of the continuing improvement in materials and patient popularity, continue to gain popularity as an alternative to traditional restorative materials. The author has updated the information and references in this dynamic area of restorative dentistry. Two important areas (Longevity and Causes of Failure) are included to aid the clinician in decision-making and communication with the patient. In addition, important new material has also been added to the section on curing lights, including discussion of the newer LED light sources. The 7th edition of this Guide continues to be a valuable contemporary reference for the dentist providing posterior composite restorations in their practice.