American Board of Orthodontics (ABO) Practice Exam

Woven bone formation occurs as an initial response in the process of bone healing or development. This type of bone is characterized by a haphazard organization of collagen fibers and is typically formed rapidly in response to injury or during fetal development. The key aspect of woven bone formation is that it does not require modeling activation, which means it is not reliant on the typical sequential processes seen in more organized bone structures.

In contrast, lamellar bone formation is a more organized and mature type of bone that involves a more complex process of bone remodeling and is influenced by mechanical strain. Lamellar bone is formed after woven bone and is characterized by its orderly structure, which provides greater strength. Resorption processes involve the removal of bone tissue, which is also distinct from the primary formation of woven bone.

Additionally, the assertion that formation is not influenced by strain is misleading. Bone formation, especially in the context of endochondral ossification, is often influenced by mechanical loads and activity levels, which help shape the final structure of lamellar bone.

Therefore, woven bone formation’s characteristic of developing rapidly and without the need for modeling activation highlights its essential role in initial bone development and healing scenarios.