Bacteria Collecting on Abutments?

John asks us:
I’ve heard that there is a problem around the abutment margin junction on dental implants where bacteria tend to collect.

This can lead to a sulfur like “smell” there (I guess due to the toxins the bacteria emit). Have many of the dentists that visit this site noticed that sulfur “smell” around the implant abutment juncture? Is bacteria the real cause of the smell?

What other negative effects could this have on one’s health if there is bacteria there? Could this bacteria migrate into other places, like our heart valves? How can this bacteria and smell problem be fixed? Could gargling with strong mouthwash kill the bacteria at the implant abutment junction? If
not, why not? What are some other suggestions. Thanks for any thoughts from all the experts out there.