Isthe radiographic bone density bigger at the area of implant orof tooth?and is thisdensity changingafter one year of function betweentooth and implant connected with bridge? the aim of the studyis tostudythe changing of radiographic bone density during one year of radial observation of the bone area around the tooth and implant connected with bridge with 3 units(rigid or non-rigid connection) depending on digital periapical radiographic.