A Descriptive Study on Histo-Morphometric Analysis of Age-Related Changes in Human Hip Articular Cartilage in Tertiary Care Setting

Background: The primary objective of this study was to systematically investigate the age-related alterations in the morphological, cellular, and histomorphometric characteristics of human hip articular cartilage. Specifically, the study aimed to establish the correlation between advancing age and cartilage thickness, explore the progression of degenerative changes, and identify potential histological biomarkers that could aid in the early diagnosis of joint diseases such as osteoarthritis. Material and Methods: A cross-sectional study was conducted using femoral head cartilage specimens collected from patients undergoing hemiarthroplasty for neck or femur fractures. A total of 60 participants, aged between 50 and 80 years, were included. The cartilage specimens underwent meticulous processing through various histological procedures, including fixation, decalcification, dehydration, and paraffin embedding. Hematoxylin and eosin (H&E) staining was utilised for detailed histopathological evaluation of cartilage morphology, cellularity, and matrix integrity. Statistical analysis was carried out using SPSS to examine the relationship between age and cartilage thickness. Results: A significant negative correlation (r = -0.95, p = 0.003) between age and cartilage thickness was observed, revealing a substantial reduction in cartilage thickness as age advanced. Cartilage thickness in individuals aged 50–55 years averaged 2.2 μm, which progressively decreased to 0.7 μm in the 76–80-year age group. Early degenerative changes, such as surface fibrillation, discontinuities, and a decrease in chondrocyte density, were detected as early as age 50. These histological alterations indicated the onset of cartilage degradation, often occurring before the clinical manifestation of symptoms like joint pain and stiffness. Conclusion: The study conclusively demonstrated that the structural integrity of hip articular cartilage deteriorates significantly with age, as evidenced by a marked reduction in cartilage thickness and the presence of degenerative changes. These alterations are characteristic of the early stages of osteoarthritis, highlighting the importance of early detection and intervention to prevent further joint degeneration. Histological analysis provided invaluable insights into the mechanisms of cartilage degradation and suggested promising therapeutic approaches, such as stem cell or gene therapy, aimed at reversing or alleviating the effects of ageing on cartilage health.