Might work for some folk, but most knee pain is caused by pushing too big of a gear and improper saddle height and fore/aft position.
A "solution" to the "dead spot" comes every few years, remember the Shimano Biopace rings from the 80s?
They werent bad for grinding in low gears, but they were horrid, imho, for spinning--they encouraged the behavior which hurt the knee in the first place.
Some folks still like to used them on fixed gear bikes that are geared tall.