 For evaluation the analyzing tool of the program SIDEXIS nextGeneration 1.51, Sirona, Bensheim, Germany is used. The image files are opened and magnified by using the function zoom once. Then the distances CEJRM to alveolar crest AC, CEJRM to bony defect DB, and the depth of the infrabony component INFRA are measured. The definition of these radiographic landmarks has been published in detail before. 