Epifyseplater

Epifyseplater, also known as growth plates, are hyaline cartilage areas in the metaphysis of long bones, located near the ends of the epiphysis. These plates are crucial for longitudinal bone growth in children and adolescents. During skeletal development, chondrocytes within the epiphyseal plate multiply through mitosis, a process called proliferation. As these cells mature, they hypertrophy, or enlarge, and then undergo apoptosis. Simultaneously, the cartilage matrix is calcified and then replaced by bone tissue through endochondral ossification. This continuous process of cartilage formation and ossification allows long bones to lengthen. The rate of growth varies depending on factors such as genetics, nutrition, and hormones, particularly growth hormone and sex hormones. Epiphyseal plates typically fuse and close by the end of puberty, usually in the late teens or early twenties, at which point longitudinal bone growth ceases. Fractures occurring through the epiphyseal plate, known as physeal fractures, can have significant consequences for bone growth if not properly managed, potentially leading to premature closure of the plate and limb length discrepancies.