13/04/2026
Stages of Osteoporosis
This illustration demonstrates the progressive spectrum of Osteoporosis, showing the transition from normal bone physiology to severe skeletal fragility. In normal bone, there is a balanced process of bone remodeling, where osteoclastic resorption is equal to osteoblastic formation. This balance maintains dense, well-organized trabeculae and strong cortical bone, ensuring optimal mechanical strength.
In Osteopenia, the early stage of bone loss, there is a mild reduction in bone mineral density due to increased resorption relative to formation. This leads to thinning of trabeculae and early microarchitectural changes. Although usually asymptomatic, it is clinically important and detected by DEXA scan with T-scores between −1 and −2.5.
As the condition progresses to osteoporosis, there is significant loss of bone mass with marked trabecular thinning, loss of connectivity, and increased cortical porosity. These changes weaken the structural integrity of bone, increasing the risk of fragility fractures even with minimal trauma.
In severe (established) osteoporosis, there is advanced bone loss with profound structural deterioration. The bone becomes highly fragile, leading to vertebral compression fractures, hip fractures, and deformities such as kyphosis. This stage is associated with high morbidity and highlights the importance of early diagnosis and management.
[osteoporosis progression, osteopenia vs osteoporosis, bone density loss stages, trabecular thinning, cortical porosity, DEXA T score interpretation, fragility fracture risk, vertebral compression fracture, skeletal pathology, bone microarchitecture]
