Certain complications have been identified with such treatments. One of the most important of these complications is the loss of alveolar bone that surrounds the implant.The disease peri-implant derives its name from the pathological inflammatory alterations which happen in the tissue which encapsulates the load-bearing implant. Peri-implant diseases are by nature, infectious. There are two entities that are conventionally explained through peri-implant diseases. peri-implantitis and mucositis. Peri-implantitis is the name of a condition in which the bony support of the implant is lost radiologically as well as clinically. This causes the peri-implant mucosa to swell. Peri-implantitis is an inflammatory reaction that happens as the supporting bone contained in the tissues that encapsulate a functioning implant starts deteriorating. Peri-implantitis is also referred to as an infection that is site-specific and generates numerous features that are commonly found in the chronic adult periodontitis. A number of researchers have found microorganisms a fundamental cause of the development of this condition. The deterioration of the peri-implant results in the establishment of a complex for microbiota which is similar to the one that occurs in the adult periodontitis. In their research, (Rosenberg et al.) identified two categories for the patients that failed the implants. The first category was of suspected infection and the second category was of trauma. In the patients belonging to the category of suspected infection, microbiota colonized the implants that resembled the ones that occur in periodontitis. On the other hand, patients belonging to the second category felt no pain and the failed implants showed a microbiological profile that resembled the one that occurs at the healthy implant sites. On the other hand, in mucositis, there occur certain changes pertaining to the peri-implant mucosa which are reversible if treatedappropriately.