OI is classified into several types, ranging from mild to severe, based on clinical and radiographic features. The most common types include:
OI Type I: The mildest form, characterized by fractures during childhood and adolescence, hearing loss, and blue sclerae. OI Type II: The most severe form, often lethal shortly after birth due to respiratory complications. OI Type III: Severe deformities, frequent fractures, and short stature. OI Type IV: Intermediate severity, with variable clinical manifestations.
