This is a prospective study on 100 knee joints in 98 patients of the knee, treated by modified valgus dome shaped osteotomy of the proximal tibia. The distal part of the osteotomy pushed anteroproximal to decompress the patellofemoral joint . Age of the patients was between 55 to 70 years. The amount of involvement of the knee compartments were assessed preoperatively by anteroposterior (AP), lateral, tunnel and merchant view. Arthroscopy was necessary for loose body removal in 3 patients. No permanent device for fixation was used, so it was possible to change the angle of osteotomy by weding the cast postoperatively for adjusting the alignment. A simple rod was used, to align the anterior superior iliac spine (ASIS) and center of patella with the medial aspect of the first metatarse. After osteotomy the patients were allowed to have a full weight bearing (WB) with a well molded long leg cast as early as convenient. There was one non-union of the tibia which followed impending compartment syndrome. After this treatment %63 of the patients can do more daily activities and their range of motion (ROM) improved, %17 gained improvement in their ROM and relieve of pain in their daily activities, %15 feel some improvement in their pain but they need to use medications and in 5% no improvement was gained.

In recent years, the use of braced frame systems has been expanded to achieve a stiff and ductile structures in high seismic zones. Among the various types of bracing systems, the knee bracing system has been specially considered for seismic design in steel structures. In this system, the diagonal member provides the system’ s stiffness, and the knee member as a fuse, provides the ductility and prevents the buckling of diagonal member; Thus, it is expected that the stiffness and ductility of the structures will be remained simultaneously. In this study, the knee braced frames modelled using finite element method under statically cyclic loading. The effect of different types of the joints between the diagonal members to the knee member on cyclic behaviour of the knee bracing system was investigated. Three fixed joints were: the diagonal connected to flange of a continuous knee member (KBF-1), the diagonal connected to the web of discontinuous knee member (KBF-2) and the diagonal connected to the web of discontinuous knee member with stiffener (KBF-3). The results showed that KBF-3 model had better performance in terms of ductility, energy absorption and ultimate capacity. Besides, the elastic stiffness of KBF-2 and KBF-3 joints were approximately the same.