What type of toothbrush should i use to minimize gum disease?

Yes: Use brush heads that are labelled soft. Water pick type of oral hygiene instruments are gum friendly also.

Soft brush/ electric: Any soft tooth brush and brushing for 2 min. I like electric brushes because the number of strokes per second are high so it is very effective in removing plaque.

Soft: Soft bristle tooth brush. Make sure that your brushing technique is correct and you brush long enough (atleast 2 min.). There are electric brushes like sonicare that hae timer so you know how long you are brushing.

Most any: Just use it! get a softer one, and concentrate where the gum meets the teeth. And floss!