 To evaluate and compare the clinical marginal bone level change MBL around the NobelReplaceTM CC implants supporting NobelProceraTM Implant Bar Overdenture fixed-removable in the mandible with the clinical marginal bone level change MBL of the NobelReplaceTM CC implants supporting NobelProceraTM Implant Bar Overdenture fixed-removable in the maxilla for a period of 5 years. 