Complications of joint diseases

Infectious and inflammatory complications

Using the example of specific inflammation (tuberculous arthritis), one can trace severe purulent-destructive complications. During the height of the disease, accompanied by hydrarthrosis and sharp pain, there is a high probability of periarticular cold abscesses forming. In an unfavorable course, the abscess ruptures with the formation of fistulae.

Even after the infection subsides, in the post-arthritic phase, long-term consequences develop. Mixed myogenic and arthrogenic contractures are formed, as well as secondary osteoarthritis, which is characterized by start-up pain and discomfort during weight-bearing. The extreme degree of functional impairment is ankylosis — complete bony or fibrous fusion of the articular surfaces.

Degenerative consequences of injuries and meniscus pathologies

Delayed surgical treatment or incomplete surgery (e.g., leaving fragments of a torn meniscus) triggers a cascade of pathological changes. The main consequences include:

• Destruction of articular cartilage.
• Rapid progression of post-traumatic osteoarthritis.
• Pronounced muscle atrophy.
• Impairment of support and motor function.

Any cartilage injury, including non-displaced patellar fractures, leads to the formation of extensive areas of chondromalacia — areas of degenerative-necrotic changes. Deep cartilage fissures reaching the subchondral bone are often diagnosed late, which accelerates joint destruction.

Mechanical complications: contractures and joint mice

Prolonged immobilization in intra- and periarticular fractures guaranteed leads to the development of persistent contractures. To prevent them, the earliest possible initiation of movement is required (use of hinged orthoses, external fixation devices, exercise therapy).

Another frequent mechanical problem is the formation of loose bodies in the joint cavity (mures articulares, or joint mice).

Causes of their formation:

1. Traumatic: detachment of a meniscus fragment, cartilage plate, marginal osteophyte, or the organization of blood clots after hemarthrosis.
2. Diseases: osteoarthritis, chondromatosis, osteochondritis dissecans (König's disease).

Loose bodies may remain asymptomatic for a long time, but when trapped between articular surfaces, they cause acute pain and sudden joint locking.

Specific ankylosis

In some systemic diseases, the loss of mobility is not merely a complication, but the basis of the pathogenesis. A prime example is idiopathic ankylosing spondylitis (Bekhterev's disease). Chronic inflammation selectively affects the spinal joints and sacroiliac articulations, leading to their progressive ankylosis and complete loss of axial skeleton flexibility.

Class and exam questions

What else to study on this topic

• Surgical tactics in tuberculous arthritis (synovectomy, resection, arthrodesis)
• The role of arthroscopy in the diagnosis and treatment of intra-articular injuries
• Classification and mechanisms of patellar fractures
• Methods of contracture prevention (positioning, exercise therapy, hinged devices)
• Differential diagnosis of tuberculous arthritis depending on the phase

Other topics in the "Specialized Adult Traumatology" section

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.