[An arthroscopic study of coxarthrosis]

Area of Science:

• Orthopedics
• Radiology
• Arthroscopy

Background:

• Hip dysplasia is a common cause of secondary coxarthrosis (hip osteoarthritis).
• Understanding the pattern of cartilage degeneration is crucial for diagnosis and treatment.
• Arthroscopy offers a direct visualization of intra-articular pathology.

Purpose of the Study:

• To arthroscopically classify cartilage degeneration in hips with coxarthrosis secondary to hip dysplasia.
• To compare arthroscopic findings with radiographic assessments.
• To determine the sequence of cartilage degeneration between the acetabulum and femoral head.

Main Methods:

• Arthroscopy was performed on 110 hips diagnosed with coxarthrosis due to hip dysplasia.
• Cartilage degeneration was classified arthroscopically using a defined grading system (Type 0-IV).
• Findings were correlated with plain radiographs and arthrograms.

Main Results:

• Cartilage degeneration ranged from normal (Type 0) to eburnation (Type IV), correlating with radiographic stages.
• In patients under 30, acetabular cartilage degeneration was more severe than femoral cartilage degeneration in 32 hips.
• Acetabular degeneration was more severe with a lower CE angle, incongruence, or thin arthrographic cartilage; femoral degeneration showed similar patterns.

Conclusions:

• Initial cartilage degeneration in hip dysplasia-related coxarthrosis primarily affects the acetabular cartilage.
• Femoral head degeneration appears to be a later event in the disease progression.
• Arthroscopic classification complements radiographic evaluation for assessing cartilage damage severity.