what are dental implants and what is the process involved?

http://www.kentsmilestudio.com/dental-services-kent/kent-dental-implants/ Dr.Dattani explains: A dental implant is essentially a titanium screw about a centimetre long, which we place as the root of a tooth. That actually fuses to the bone and becomes part of you and once it’s integrated, that means fused, it’s physically impossible to remove. The hip surgeons borrowed our technology and that’s, if you can imagine if it can take the forces of someone walking it can take the forces of someone biting. On top of that we screw and glue a crown on top and that’s the part you will see. So the whole process involves the titanium screw, known as the implant, and the crown and the abutment that goes on top. What was the second question?

What are the processes that are involved, what would somebody go through?
It’s a surgical procedure similar to having a tooth removed so the first process is we actually may need to remove teeth, we may need to clean the teeth; we may need to do your fillings.