We work mainly with the Straumann brand of implants, which provide a lifetime guarantee of their solidity (subject to compliance with the indications for use). Crowns made by the dental laboratory are not covered by this implant manufacturer’s guarantee. The loss of dental implants is generally the result of an infectious or inflammatory process. This phenomenon is therefore independent of an implant defect. This cause of implant failure cannot logically be covered by an implant manufacturer’s or surgeon’s warranty.