The course of osteoarthritis is slow, there are some major violations of the synovialjoint disease.
骨关节炎病程发展缓慢，主要侵犯有滑膜组成的关节病变。
2
Osteoarthritis is a degenerative disorder of the synovial joints that is characterised by joint pain, stiffness and limited range of movement.
骨性关节炎是滑膜关节的退变性疾病，其特点是关节疼痛、僵直、关节活动受限。
3
The spine has been theorized as a "protected" environment because it is not a synovialjoint, has less range of motion, and different loading mechanisms than the hip or knee joint.