My husband has gone through a very similar situation. He had his hip replaced in 2002. Initially he did not have problems. By 2010 he began to have pelvic floor issues with extreme pain and dysfunction. After looking extensively online, he surmised that it had to do with the hip replacement. He believes that he had pudendal nerve entrapment, but was never verified if that was the cause. His cobalt and chromium levels were not elevated so the surgeon refused to replace the hip joint despite the fact that the artificial hip joint had been recalled. That didn't seem to be of any consequence to the surgeon. He had his cobalt and chromium levels tested several times and they were never elevated. In the ensuing years, he began to have cognitive issues and by 2024 was diagnosed with dementia. His memory continues to decline. I think we should revisit this possible cause of his dementia.