The fundamental work of Branemark and associates in 1960s demonstrated that commercially, pure titanium implants can be anchored to the jaw bone and used successfully for tooth replacement. Osseointegration is the direct structural and functional connection between ordered, living bone and surface of a load carrying implant. Periimplantitis is a clinical manifestation where clinically and radiographically evident loss of bone support for the implant occurs, together with an inflammatory reaction of the periimplant mucosa. This manifests clinically as reddening of periimplant mucosa and bleeding on probing; accompanied by increased periimplant pocket depth and progressive mobility of the implant in severe cases. The major etiological factors attributed for such a failure include bacterial infection and excessive mechanical stress. Thus, this review mainly addresses the aetiopathogenesis of periimplantitis , its clinical features and various methods to manage the same.