Surface Topography for Implants: Where is this Trend Headed?

Anon. asks:

I have been placing and restoring dental implants for twenty years. I have tried most of the major dental implant companies. They all seem to work about the same, at least in my hands. I am wondering if the critical factor here in osseointegration is the surface topography?

We have HA, SLA, plasma spray, TiUnite, Osseotite, Nanotite and so on. Each manufacturer claims his surface topography creates the most rapid and most complete osseointegration. Who to believe? There is so much contradictory research. Have any of you found one particular surface coating to be the best? Where are we headed down this road? What is the driving rationale behind this technology? Comments would be appreciated. Thanks.