Choosing between dermapen, dermaroller and TDS (transdermal delivery system) is one of the most important decisions in professional microneedling practice. Each device has distinct technical characteristics that make it more suitable for specific indications, body zones and client profiles. This guide provides a detailed technical comparison to help practitioners select the optimal device for each protocol.
Electric dermapen
The dermapen is a motorised device that vibrates a needle cartridge in vertical motion (perpendicular to the skin) at high speed. Needles penetrate and retract in milliseconds, creating perfectly perpendicular microchannels with minimal lateral tissue damage.
- Speed: 5,000–16,000 RPM depending on model and setting
- Depth: Adjustable 0.25–2.5 mm in 0.1 mm increments via micrometric dial
- Needles: Single-use sterile cartridges, typically 12–36 needles
- Penetration angle: Strictly 90° (vertical) — less tissue trauma per channel
Preferred indications: Facial rejuvenation, eye contour (0.25–0.5 mm), nasolabial folds, lip contour, atrophic acne scars (ice-pick, boxcar), and scalp treatments for alopecia. The adjustable depth makes it ideal for treating multiple zones in a single session.
Dermaroller
The dermaroller is a cylindrical roller with fixed needles arranged in radial rows. As it rolls over the skin, needles penetrate at oblique angles (30°–90° depending on position), creating channels that are wider at the surface.
- Needle count: 192–1,080 depending on model and roller width
- Depth: Fixed per roller — changing depth requires changing the device
- Penetration angle: Variable (30°–90°) — creates oblique channels
- Power: Manual, no battery or electrical connection needed
Preferred indications: Large body surfaces (back, thighs, buttocks, abdomen), scalp alopecia treatment, body stretch marks, and cellulite protocols. Lower cost per session makes it economical for body treatments requiring extensive coverage.
TDS — Transdermal Delivery System
TDS devices (electroporation, iontophoresis, ultrasound, radiofrequency) deliver actives through the skin barrier without needle penetration. They work by temporarily increasing cell membrane permeability or using electrical current to drive charged molecules through the skin.
- Penetration: Non-invasive — no microchannels or micro-wounds
- Pain: Minimal to none
- Recovery: No downtime
Preferred indications: Sensitive skin, rosacea-prone clients, maintenance sessions between dermapen cycles, and as Phase 2 of the Institute BCN combined protocol (Meso Pen + TDS) for hyaluronic acid re-epithelialisation.
Technical comparison table
| Feature | Dermapen | Dermaroller | TDS |
|---|---|---|---|
| Penetration | Vertical (90°) | Oblique (30°–90°) | Non-invasive |
| Depth | Adjustable 0.25–2.5 mm | Fixed per model | N/A |
| Irregular areas | Excellent | Difficult | Good |
| Large body areas | Slow | Fast | Moderate |
| Equipment cost | Medium | Low | Medium–High |
| Active penetration | Excellent | Good | Good |
| Pain level | Low–Moderate | Moderate | Minimal |
| Dark phototypes | Safe | Safe | Safe |
Protocol-to-device matching
| Protocol | Preferred device | Why |
|---|---|---|
| Facial rejuvenation | Dermapen | Adjustable depth for different facial zones |
| Eye contour | Dermapen | Precision at 0.25–0.5 mm |
| Alopecia / scalp | Dermapen or Dermaroller | Roller for large areas, pen for targeted zones |
| Atrophic acne scars | Dermapen | Precise depth control per scar type |
| Cellulite / body | Dermaroller | Faster coverage of large body surfaces |
| Sensitive skin / rosacea | TDS | No micro-injuries, no inflammation |
| Post-needling (HA seal) | TDS | Re-epithelialisation with Hyaluronic Acid 2% |
Institute BCN actives are formulated for compatible use with all three device types. The ampoule viscosity is optimised to flow through microchannels (dermapen/dermaroller) and to be driven through the skin barrier by TDS systems.