One of our partner clinics in London runs a split-face study every quarter on a volunteer patient. They compare two protocol variables side by side – depth versus pass count, serum versus no serum, stamp versus drag technique. Over three years they have accumulated data that tells a different story than the device manuals. We share the relevant findings here.
We analyzed treatment logs from 12 clinics over 18 months to answer a practical question: how many microneedling sessions does it actually take to see meaningful improvement for acne scars? The answer: 3 to 6 sessions for most patients, but the variability depends more on scar type and depth than on the device used. Rolling and boxcar scars respond faster – measurable improvement visible at session 3.
Ice-Pick Scars Require
Ice-pick scars require 5 to 6 sessions minimum, and some patients need 8+ sessions for full correction. The spacing between sessions matters as much as the number of sessions. Four weeks between sessions is the minimum recommended interval for collagen remodeling to complete.
Some Clinics Push
Some clinics push to 3-week intervals for faster results, but our data shows no improvement in final outcomes at 3-week versus 4-week spacing – only increased downtime and patient discomfort. What about combining microneedling with subcision? Our data shows that patients who received subcision before microneedling required 2 fewer sessions on average to achieve the same scar improvement.
Mechanical Release Tethered
The mechanical release of tethered scar tissue allows the microneedling-induced collagen production to remodel the scar more effectively. The clinics that track this data are the ones that achieve consistent results. We work with several of them through tbphp and their treatment data informs our cartridge design priorities.
We share this data because we believe clinics make better decisions when they have real numbers, not marketing claims. Our cartridges are used in many of the clinics that contributed data to this article. If you are looking for a consistent supply partner who understands clinic operations, reach out. tbphp provides OEM partners with device specification data.
Related: Clinical Photography Standardization for Microneedling Before-and-After.