The collagen produced in response to
PMMA is not permanent because the body is constantly undergoing a cycle of collagen production, breakdown, and renewal. However, the
PMMA microspheres remain in place as a stable nidus, continuously stimulating new collagen production at the site of their placement.
Fibroblasts play a key role in this process. They migrate to the
PMMA site as part of the body's inflammatory response and actively produce collagen to encapsulate the microspheres. Over time, older collagen is broken down and replaced in a process known as remodeling. Similarly, fibroblasts have a lifespan and are replaced by new fibroblasts over time. This cycle continues throughout life, though it slows with age, contributing to sagging skin and wrinkles. Various factors influence this cycle—catabolic factors (like smoking, illness, and stress) break down collagen, while anabolic factors (such as sleep, good nutrition, and exercise) promote its production.
Because of this ongoing remodeling, someone’s collagen levels can fluctuate based on their lifestyle choices. Engaging in anabolic behaviors will lead to greater collagen production, while catabolic factors will reduce it. Even so, everyone continues to make some level of collagen, even smokers. However, these changes can be noticeable over a relatively short period. For example, a patient who quits smoking can show dramatic improvements in skin quality within months.
Given this, someone with significant amounts of
PMMA filler may experience variations in collagen volume depending on their diet, lifestyle, and genetics. Optimizing collagen production is straightforward—eat well to minimize free radicals, avoid smoking, get enough sleep, exercise, and manage stress. These are all good things to do for your overall health, so you should aim for them regardless. That said, a couple of syringes of
Bellafill are probably the equivalent of being perfect at all these things. So if you’re not hitting every mark - who is?—you’re probably better off just doing an extra syringe of
Bellafill and calling it a day.