Ah yes, the joy of destroyed meniscus can be see on the left hand side of the top picture. The empty space that had developed over the last 4 years from two medial meniscus tears had degraded to the point of me walking bone on bone for the last 6 months or so. The HTO is designed to shift the weight from about 80% on the medial side to something significantly more balanced to better utilize the lateral portion of the knee. 11 Days since the operation and well immobility and pain are still very much my friends.