The selection of a 1.5mm needle length and a 36-pin configuration is a strategic decision designed to balance depth of penetration with treatment density. The 1.5mm length allows the needles to bypass the outer epidermis and physically reach the dermal layer to trigger collagen production. Simultaneously, the 36-pin configuration maximizes the number of micro-channels created, ensuring high-density coverage and improved treatment efficiency for scar remediation.
The core objective of this configuration is to mechanically break down old fibrotic strands in the dermis while creating enough high-density micro-injuries to stimulate a uniform and significant collagen remodeling response.
The Mechanics of Depth: Why 1.5mm?
Penetrating the Epidermis
To treat acne scars effective, you cannot simply treat the surface skin.
The 1.5mm length is critical because it ensures the needle tips penetrate through the epidermis.
Reaching the Dermal Layer
The pathology of acne scarring exists in the dermis.
By reaching the dermal layer, the needles provide the necessary physical stimulation to induce collagen remodeling, which is the biological mechanism required to smooth and repair the skin.
The Strategy of Density: Why 36 Pins?
High-Density Micro-Pores
A 36-pin cartridge is distinct from lower-pin counts because of the sheer volume of micro-injuries it creates.
During the reciprocating movement of the device, this configuration generates high-density micro-pores, ensuring that a larger percentage of the scar tissue is physically treated.
Increasing Coverage Rates
The efficiency of the treatment relies on how thoroughly the area is addressed.
The 36-pin setup significantly increases the coverage rate of the micro-injuries, which improves the overall efficiency of the session compared to lower-density needle heads.
Understanding the Trade-offs
Depth Limitations for Severe Cases
While 1.5mm is effective for moderate scarring, it may not be sufficient for the deepest defects.
For severe atrophic acne scars, the pathological foundation often lies deep within the reticular layer of the dermis, requiring a greater depth to be effective.
When Deeper Penetration is Required
In cases of deep atrophic scars, a 2mm puncture depth is often necessary.
Physical stimulation at this depth is required to break down deep-seated fibrotic strands and stimulate regeneration in the reticular layer, facilitating the significant remodeling that 1.5mm needles might miss.
Making the Right Choice for Your Goal
Whether you choose the standard 1.5mm or a deeper approach depends entirely on the severity of the tissue damage.
- If your primary focus is moderate-to-severe scarring: Utilize the 1.5mm / 36-pin configuration to ensure dermal access and maximum surface coverage for efficient collagen induction.
- If your primary focus is deep, severe atrophic scars: Consider increasing the depth to 2mm to ensure you are reaching the reticular layer where the deepest fibrotic strands reside.
Select the depth that targets the specific pathological layer of the scar to ensure the stimulation leads to effective tissue remodeling.
Summary Table:
| Feature | Specification | Clinical Benefit |
|---|---|---|
| Needle Length | 1.5mm | Reaches the dermal layer to trigger collagen remodeling |
| Pin Density | 36-Pin | Creates high-density micro-channels for maximum coverage |
| Target Depth | Papillary Dermis | Breaks down fibrotic strands in moderate scar tissue |
| Treatment Focus | Moderate/Severe Scars | Balances treatment efficiency with healing downtime |
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References
- Waleed Albalat, Mona Elradi. Microneedling combined with botulinum toxin-A versus microneedling combined with platelet-rich plasma in treatment of atrophic acne scars: a comparative split face study. DOI: 10.1007/s00403-022-02446-9
This article is also based on technical information from Belislaser Knowledge Base .
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