Fig. 6
From: Control of articular synovitis for bone and cartilage regeneration in rheumatoid arthritis
a–c, a′–c′ Bone regeneration after synovectomy of the 5th metatarsophalangeal joint of the left foot. The left panel shows the preoperative radiograph of the left foot. Bone erosion was seen in the 5th metatarsal head. The middle panel shows the reappearance of the 5th metatarsal head 2.5 years after synovectomy of the joint. Joint space narrowing appeared at the 1st metatarsophalangeal joint. The right panel shows consolidation of the 5th metatarsal head. The 1st metatarsophalangeal joint was fixed