I had 4 root canals in the past 3 years. About 3 of them are showing what a radiologist described as rarifying osteitis. It was seen on a cbct scan. I have had pain above a few but was diagnosed with trigeminal neuralgia. My endo moved so I followed up with a new one. He was not concerned and felt it was a bone scar. What does this mean and would a future implant be impossible with a bone scar?