Now this may be a bit off-topic, but I don't really see how forcing injured rikishi to dohyo before the injuries have healed improves the quality of sumo on the dohyo. I would claim that the opposite is true. Just think of sumo (still injured) Kotooshu has shown during last few bashos. He has been criticized a lot lately and I don't think it's because of having too much quality in his sumo.
And to get back to topic:
That's basically what he said. The quote would be something like "Well, if a 22-year old's knee can't hold a man then, dammit, it has to be cut off. But (the injury) has to be treated properly and it (the knee) will hold."
He also said that the injury is not as serious as feared and that he hopes to compete in Osaka. In other news he said that he'll be back in (light) training in 2-3 weeks.