Arthroscopic surgery will probably give you the most predictable result. Arthroscopic surgery can be performed without antibiotics at the discretion of your treating surgeon.
If surgery is not an option, I recently saw a brace, known as the Unloader Lite, designed to take a small amount of stress off the medial compartment, and ease the symptoms of a torn meniscus. At present, I have no real experience with this brace. Remember, it is by no means a cure, it simply controls the symptoms.