Resin composites are an ideal material for esthetic restorations. Despite the fact that these materials have many uses, they can have failures. This book is about failures of composite restoration which depends upon many factors. It can be related to patient, dental surgeon or restorative material. Diagnosis and case selection is the first and foremost step on which failure of composite restoration depends. The isolation of the operating area, tooth preparation, manipulation of the restorative material, and shade matching are other aspects on which composite restoration failure rely. Finally, aesthetic restorations are a blessing for dentistry. In addition to its benefits, resin composites have a number of disadvantages that must be overcome with expert skills and advance equipment in order to achieve success.