<qa>  How long does the cumulative survival rate of the NobelReplaceTM CC implants support?1. To evaluate and compare the cumulative survival rate CSR of the NobelReplaceTM CC implants supporting NobelProceraTM Implant Bar Overdenture fixed-removable in the mandible with the cumulative survival rate CSR of the NobelReplaceTM CC implants supporting NobelProceraTM Implant Bar Overdenture fixed-removable in the maxilla for a period of 5 years. 