Rhizarthrosis: Causes, Symptoms, and Treatment

What Is Rhizarthrosis?

Rhizarthrosis, also known as thumb osteoarthritis, is a form of arthritis that affects the joints in the thumb area. It involves the gradual wearing down of cartilage, which allows smooth movement between the bones in the joint. As this cartilage wears away, pain, stiffness, and swelling may occur, making even simple movements difficult and painful. Rhizarthrosis is particularly common among middle-aged and older adults, especially women, although the exact causes are not entirely clear. Understanding what rhizarthrosis is and how it affects the joint is key to finding effective treatments and maintaining hand functionality.

Causes of Rhizarthrosis

Rhizarthrosis does not develop overnight. It is the result of a combination of factors that contribute to cartilage wear over time. The main causes include:

• Aging: The most common cause of rhizarthrosis is the natural aging process. With age, cartilage becomes less flexible and more prone to wear.
• Genetics: A predisposition to developing rhizarthrosis can run in families, indicating a possible genetic cause.
• Past Injuries: Thumb injuries, such as fractures or dislocations, can increase the risk of developing rhizarthrosis in the future.
• Repetitive Strain: Jobs or hobbies involving repetitive movements or pressure on the thumb joint can lead to premature wear.
• Inflammatory Conditions: Conditions such as rheumatoid arthritis can cause inflammation and joint damage, increasing the risk of rhizarthrosis.

Symptoms and Signs of Rhizarthrosis

The symptoms of rhizarthrosis develop gradually and worsen over time. The most common symptoms include:

• Pain: Pain in the thumb joint is often the first sign of rhizarthrosis, which may worsen during activities such as gripping or lifting objects.
• Stiffness and Reduced Mobility: Stiffness in the thumb joint, especially in the morning or after periods of inactivity, can limit mobility and hand function.
• Swelling and Tenderness: Swelling around the thumb joint and tenderness to touch.
• Decreased Grip Strength: Reduced grip strength and difficulty performing fine motor tasks.

Timely recognition of these symptoms and seeking advice from a healthcare professional can help slow the progression of the disease and improve quality of life.

Diagnosis

Accurate diagnosis of rhizarthrosis is essential for effective treatment of the condition. Healthcare professionals rely on a multi-step approach that includes medical history, physical examination, and imaging tests to ensure precise diagnosis.

• Medical History and Physical Examination: A thorough collection of information about symptoms and past medical issues helps doctors understand the progression of the condition and its impact on the individual’s daily life. Physical examinations, which assess pain, stiffness, swelling, and joint mobility, are crucial for determining the extent of the condition.
• Imaging Diagnostics: X-rays can reveal characteristic signs of rhizarthrosis, such as joint space narrowing, bone shape changes, or the presence of bone spurs. Ultrasound and MRI provide more detailed views of soft tissues, including cartilage, and can help detect early signs of the disease that may not be visible on X-rays.
• Other Tests: In some cases, when symptoms are unclear or there is suspicion of other causes of pain, additional tests may be performed. Joint fluid analysis, where fluid is extracted from the joint and examined under a microscope, can help rule out inflammatory conditions such as rheumatoid arthritis. This step is critical to ensure the treatment targets the correct cause of the symptoms.

Treatment Options for Rhizarthrosis

The goal of rhizarthrosis treatment is to alleviate symptoms and improve joint functionality. While there is no complete cure, symptoms can be effectively managed with the right approach, allowing individuals to maintain an active life.

Conservative Methods

• Physiotherapy: Individually tailored exercises recommended by a physiotherapist are crucial for strengthening the muscles around the affected joint and improving its stability and mobility. Physiotherapy may also include methods like ultrasound or electrotherapy to relieve pain.
• Orthoses: The use of thumb braces that stabilize the joint can significantly reduce pain during daily tasks. These braces are often adjustable to suit individual needs and activity levels.
• Medications: Medications to reduce pain and inflammation are another treatment option. In some cases, local corticosteroid injections may be prescribed to provide rapid symptom relief.

Surgical Treatment

Surgical procedures are usually recommended only when conservative methods fail to provide sufficient relief. Arthroplasty and arthrodesis offer long-term solutions for improving joint function and reducing pain. The decision for surgical treatment depends on the extent of joint damage, the patient's age, and overall health condition.

The Role of Physiotherapy in Treating Rhizarthrosis

Physiotherapy plays a significant role in managing osteoarthritis of the thumb saddle joint. Through various therapeutic techniques, physiotherapy offers a comprehensive approach focused on pain relief, improved mobility and function, and recovery of the affected joint.

• Shockwave Therapy: Shockwave therapy provides a viable option for alleviating pain caused by osteoarthritis in finger joints.
• TECAR Therapy: An effective method that reduces pain and inflammation by increasing tissue temperature.
• Laser Therapy: Popular for its anti-inflammatory and pain-relieving effects on the affected joint.
• Joint Mobilization: This technique focuses on improving joint mobility, reducing pain, and enhancing stability. With gradual, controlled movements, physiotherapists gently stretch and mobilize the affected joint, contributing to greater flexibility and reduced pain.
• Kinesiological Exercises: Therapeutic exercises are crucial in treating rhizarthrosis. Physiotherapists focus on improving mobility, hand function, and muscle strength.
• Alternative Therapies: Many patients seek complementary methods for symptom relief. Acupuncture, massages, heat and cold packs, and dietary supplements are popular options that may provide additional relief.

Physiotherapy offers patients with rhizarthrosis an opportunity to manage symptoms, improve overall hand function, and reduce pain. With individually tailored programs incorporating these various techniques, physiotherapy provides the foundation for a successful and comprehensive approach to treating rhizarthrosis.