Implant materials have advanced quite a bit over the past 15 years or so. Straumann are one of the top brands - but there are others. Best to go to a dentist who does implants almost every day. Not some little clinic (every clinic offers them). I go to one of the most established places for mine in Bangkok (but not the most expensive places). You will first need a full mouth xray (a CT scan while you stand), which will help to determine the amount of bone available. They can use a powdered artificial bone graft to augment the area of the implant - but really, if you don't have much bone left after decades of no teeth there, then it's risky business getting implants. The place I go to is quite advanced. They don't even do the gooey impressions anymore - it's all done by a high tech wand - a sort of gum/bone ultrasound. (also, if you are on blood thinners, aspirin, etc., you need to tell the dentist well in advance so they can develop a response if there is a lot of bleeding).