top of page

PDO Mono Threads: How Many Do You Really Need?

Alison Mary

Updated: Feb 4

If you’ve been considering PDO mono threads for skin tightening and collagen stimulation, you may have noticed that some practitioners offer just a handful of threads, while others use 100 or more per session. So, how many do you really need to see noticeable results?

The short answer: More is better—within reason. The effectiveness of PDO mono threads isn’t just about placing a few here and there; it’s about creating a strong collagen support network under the skin. Let’s break down why quantity matters and what happens if too few threads are used.


Example of a 'full face' of threads showing the minimal use of threads, which will not be effective for results.
Example of a 'full face' of threads showing the minimal use of threads, which will not be effective for results.

Another example showing the minimal use of threads, which will not be anywhere near effective for results.
Another example showing the minimal use of threads, which will not be anywhere near effective for results.

What Are PDO Mono Threads?


PDO (polydioxanone) mono threads are fine, dissolvable sutures placed under the skin to trigger collagen production. Unlike PDO cog or screw threads, which provide an immediate lifting effect, mono threads work by stimulating fibroblasts; the cells responsible for collagen production. Over time, these threads dissolve, leaving behind a firmer, more structured skin matrix.

So to build this collagen scaffold effectively, you need enough threads placed strategically and evenly across the treatment area.


 

Why Does Quantity Matter?

The key to success with PDO mono threads is density and coverage. Here’s why:


  1. Fibroblast Activation Needs Widespread Stimulation:


    • Fibroblasts (the cells responsible for collagen production), respond to controlled micro-injury. When enough threads are placed strategically, they create a scaffold-like structure that stimulates collagen growth across a larger area.

    • If only a few threads are used, the collagen response is too weak to make a noticeable difference or provide any real structure - like putting up scaffolding outside the front of a house, but only doing half it.


  2. Collagen Builds Gradually, Not Instantly:


    • PDO threads do not give instant results—they work by triggering your body’s natural healing process.

    • The more threads placed, the more collagen is produced over time (typically 3–6 months), leading to firmer, more youthful skin.


  3. Preventing Patchy, Uneven Results:


    • Using a high number of threads ensures even collagen stimulation.

    • If too few threads are inserted, you may see uneven results, with some areas improving while others remain the same.


  4. A Few Threads Won’t Achieve Noticeable Change:


    • Some clinics insert as few as 10-20 threads per session, which is far too low to make a real impact.

    • I use a minimum of 100 threads per session to create the collagen framework needed for visible, long-lasting improvements.


 

Beware of Under-Treatment: Don’t Waste Your Money;


Unfortunately, many practitioners offer PDO mono threads without the proper knowledge of collagen stimulation. They may place a small number of threads and charge high prices, giving clients false expectations of results.


Here’s how to avoid wasting your money:

Ask how many threads will be used—if it’s less than 50, reconsider.

Choose an expert who understands collagen stimulation and uses an adequate amount of threads.

Understand that PDO threads require time to work—immediate results are not realistic with mono threads.


 

Maximizing Your Results:


PDO mono threads work best when combined with other collagen-boosting treatments, such as:

CO2 fractional laser – Tightens skin and reduces fine lines and wrinkles.

Microneedling with radiofrequency – Enhances skin tightening.

Biostimulators like Sculptra or hyperdilute Radiesse – Supercharges collagen production.

Medical-grade skincare – Supports skin regeneration between treatments - retinol/tretinoin (prescription - not off the shelf).


 

Final Thoughts: More Threads = Better Results:


If you’re investing in PDO mono threads, make sure you’re getting the right number for optimal collagen stimulation. Using a high quantity (100+ threads per session) ensures even collagen production, stronger skin, and long-lasting improvements.


Don’t be misled by under-treatment—PDO mono threads are a science, not a shortcut.


Always choose a knowledgeable practitioner who prioritizes real results over quick fixes.


💬 Got questions about PDO mono threads? Drop them in the comments or book a consultation!




 

PDO threads don’t just lift—they stimulate collagen. Here’s the science behind it.


Wondering if PDO threads are better than microneedling? Compare the options here.



Comments


bottom of page