Difference between Pyorrhea and Pyorrhoea

What is the difference between Pyorrhea and Pyorrhoea?

Pyorrhea as a noun is an inflammation of the gums in which the teeth become loose; chronic periodontitis while Pyorrhoea as a noun is a flowing or discharge of pus; periodontitis

We hope you now know whether to use Pyorrhea or Pyorrhoea in your sentence.