Do more shots mean better results?
We followed the claim that 900 shots is what works back to its source. No human trial has randomised people to different shot counts. So where does the number come from?
The short answer
We could not find a human study showing that more shots give a better result. No trial has randomised people to 300 versus 600 shots. What exists is a three-person histology study, a pig experiment stacking 1, 6 and 12 shots on one spot, and a survey in which 86.3% of 82 physicians agreed that 900 shots is appropriate. Moreover the manufacturer technical manual ends treatment not at a shot count but when the patient reports heat feedback of 2.0 to 2.5 on a scale of 0 to 4. Miso Clinic is at 4F Bombom Building, 125 Dongdeok-ro, Jung-gu, Daegu, in front of Exit 1 of Kyungpook National University Hospital station. Phone 053-428-2700. Weekdays 11:00–19:00, Saturday 10:00–16:00 with no lunch break, closed Sunday and public holidays.
A shot is a specification, not a dose
One radiofrequency shot is a single delivery of energy through a tip held against the skin for a set time. The total count is not set by the practitioner: it is sealed into the single-use tip.
| Tip | Area | Sealed count |
|---|---|---|
| Density ALPHA | not published | 600 shots |
| Density Eye | not published | 600 shots |
| Density Face | not published | 1,000 shots |
| Density Body | not published | 600 shots |
| XERF i05 | 50 mm² | 400 shots |
| XERF i10 | 100 mm² | 300 shots |
| XERF E40 | 400 mm² | 600 shots |
| XERF E60 | 600 mm² | 600 shots |
| Thermage EYE tip | 0.25 cm² | 450 REP |
| Thermage TOTAL tip | 4.0 cm² | 600 REP |
So “how many shots would you like?” really means “how many tips would you like?” The 300, 600 and 900 sold in the market fall out as multiples and combinations of those specifications; 900 is usually one and a half tips or two divided up. It is a consumable unit, not a clinically defined dose. Thermage appears in the table because its tip specifications are published; Miso Clinic does not have a Thermage device.
The manufacturer stopping rule is not a shot count
We checked the technical user manual of a long-established monopolar device. The stopping rule reads:
“Continue to treat, adjusting the Treatment Level setting up or down within the recommended range, until the patient reports heat feedback of 2.0–2.5 on a scale of 0 to 4.”
The criterion is what the patient reports, not how many shots were fired. And as far as we could establish from the whole document, no recommended total shot count for face or body appears anywhere in it.
One number does appear: delivered REPs “vary widely (100-2000) based on the size and cooling profile of the tip”. But that sentence sits in a passage about cryogen consumption. It is consumable management, not clinical guidance, and reading it as “up to 2000 shots is possible” is a misreading.
The shift to low energy and many passes is real, but thinly evidenced
In the early 2000s this treatment was a single high-energy pass. Today it is several low-energy passes, and that shift is the background to rising shot counts. Taken one at a time, the evidence for it looks like this.
| Evidence | Limit |
|---|---|
| Histology in three people | Three participants. |
| Pig experiment stacking 1, 6 and 12 shots on one spot | Not human, and it stacks shots on one spot rather than comparing a total for a whole face. 12 was the highest dose, so the ceiling is unknown. |
| Survey of 82 physicians | 86.3% agreed 900 shots is appropriate. A survey is consensus, not measurement. |
All three support the direction of low energy and repeated passes. None of them shows that 600 beats 300 in people. Direction and dose are different questions.
The same count is a different dose with a different tip
This is the part that matters in practice. The number 600 does not fix the dose, because the area covered changes with the tip.
| Handpiece | Tip area | Sealed shots | Area × shots |
|---|---|---|---|
| i05 | 50 mm² | 400 | 20,000 mm² |
| i10 | 100 mm² | 300 | 30,000 mm² |
| E40 | 400 mm² | 600 | 240,000 mm² |
| E60 | 600 mm² | 600 | 360,000 mm² |
600 shots with E40 and 600 with E60 differ by a factor of 1.5 in nominal area. Those figures use the sealed counts, and real coverage is smaller because passes overlap by 15 to 30%. The point stands either way: a shot count is incomplete unless the tip is named with it.
So is the shot count meaningless
No, but its meaning is not the one people assume.
- A wider area to cover needs more shots. That is a question of area, not of effect.
- Adding shots to the same area means overlapping more, and no human data shows that scales the result.
- Heat feedback is used as the endpoint because tissue responds differently from person to person at the same power and the same count.
So if a consultation is only about shot counts, it is worth asking which part of my face that number covers.
Summary: what is established and what is not
Established
- A shot is a specification sealed into the tip, and market numbers are consumable units
- The manufacturer endpoint is heat feedback of 2.0 to 2.5, with no recommended total
- The same count covers a different area with a different tip
Not established
- Any human trial randomising 300 versus 600 shots
- Any human data showing results scale with shot count
- Any manufacturer recommendation for a total facial shot count
Shot count: common questions
Does a higher shot count mean a proportionally bigger effect?
We could not find a human study showing that. No trial has randomised people to 300 versus 600 shots.
I was told 900 shots is the number that works.
That figure comes from a survey of 82 physicians, 86.3% of whom agreed it was appropriate. A survey is expert consensus, not a measurement.
What is the difference between 300 and 600 shots?
Usually how many tips are used. It changes the area that can be covered; it does not mean twice the effect.
Then what ends the treatment?
The manufacturer manual sets the endpoint at patient-reported heat feedback of 2.0 to 2.5 on a scale of 0 to 4. A shot count is not written as an endpoint.
Why does the same 600 shots cost differently at different clinics?
It may be 600 shots with a different tip. A different tip area covers a different surface, so the same number is not the same amount of treatment.
Do more shots mean more side effects?
We could not find human data measuring how adverse events rise with shot count. Older observational work did advise against firing immediately over the same spot.
Where can I discuss lifting treatment in Daegu?
Miso Clinic is at 4F Bombom Building, 125 Dongdeok-ro, Jung-gu, Daegu, in front of Exit 1 of Kyungpook National University Hospital station, 053-428-2700. Weekdays 11:00-19:00, Saturday 10:00-16:00, closed Sunday and public holidays.
Read next
Product pages
Product pages: Density · XERF · Oligio Kiss
Who wrote this
Written and reviewed by Lee Chi-Hak, MD, director of Miso Clinic, Daegu. The treatment standards and injection design set out here are the ones we use in practice.
| Medical director | Lee Chi-Hak, MD |
|---|---|
| Address | 4F Bombom Building, 125 Dongdeok-ro, Jung-gu, Daegu, South Korea · Exit 1, Kyungpook National University Hospital Station |
| Phone | +82-53-428-2700 |
| Hours | Weekdays 11:00–19:00 (lunch 13:00–14:00) / Saturday 10:00–16:00 (no lunch break) / Closed Sundays and public holidays |
| Columns | All clinical columns |
| Reference library | All booster and device references |
References
- A shot is a sealed specification — US FDA GUDID entries and each manufacturer’s published data. The 300 / 600 / 900 sold in the market fall out as multiples and combinations of those specifications. It is a consumable unit, not a clinically defined dose.
- The manufacturer’s stopping rule — Thermage CPT System Technical User’s Manual, Solta Medical, Model TG-2B-P, NP009240-06, September 2021. p.49: “Continue to treat … until the patient reports heat feedback of 2.0–2.5 on a scale of 0 to 4”. The line on p.30 about REPs varying from 100 to 2000 sits in a passage about cryogen consumption, not clinical guidance. No recommended total shot count for face or body appears anywhere in the document.
- Why the protocol moved to low energy, many passes — Kist D, Burns AJ, Sanner R et al., Lasers Surg Med 2006;38(2):150–154, PMID 16493679 (three subjects, single high-energy pass versus 3-5 low-energy passes, transmission electron microscopy) · Dover JS, Zelickson B et al., Dermatol Surg 2007;33(8):900–907, PMID 17661932 (survey of 14 physicians). They support the direction but not a dose-response for shot count.
- The only dose-response experiment with shot count as the variable (animal) — Roh H, Lee YI, Jung J et al., Int J Mol Sci 2026;27(12):5162. Nine pigs in vivo, 4 cm² tip, 1 · 6 · 12 shots on the same spot, histology at 2, 4 and 8 weeks; collagen fibre density rose most and earliest in the 12-shot group (p<0.05). Not human, and it stacks shots on one spot rather than comparing a total for a whole face. 12 was the highest dose, so the ceiling is unknown.
- Where 900 shots comes from — Suh DH, Hong ES, Kim HJ et al., Dermatologic Therapy 2017;30(5):e12536, PMID 28805286. 82 survey responses, 86.3% agreed that 900 shots is appropriate for facial tightening at ages 35-65. The 2020 follow-up (33(6):e14284, PMID 32902088) had 52 respondents preferring a 600 REP 4 cm² tip. Both are surveys, not comparative trials.
- The same shot count is a different dose with a different tip — nominal area is tip area × shot count, and real coverage is smaller because passes overlap by 15-30%. Yang YS et al., J Clin Aesthet Dermatol 2024;17(2):20–22 (3 versus 4 cm², 300 shots per side) · Suh DH et al., Lasers Med Sci 2025;40:530 (0.25 cm² eye tip, 225 shots per lid). Nominal area is our own calculation and appears in no paper.
- Density specifications — Jeisys Medical published data: monopolar then bipolar in sequence, up to 400 W, RIC impedance adjustment, five-stage gas cooling, tips ALPHA 600 · Eye 600 · Face 1,000 · Body 600 shots (sealed guaranteed count). Approved as a medical device by the Korean MFDS. Tip areas are not published by the manufacturer.
- XERF specifications — Lutronic published data: monopolar, 6.78 MHz plus 2 MHz, handpieces i05 (5×10 mm · 400 shots) · i10 (10×10 mm · 300 shots) · E40 (20×20 mm · 600 shots) · E60 (20×30 mm · 600 shots). The shot count is sealed into the tip; it is not a recommendation for how many shots a face needs.
- Thermage — Solta Medical, 6.78 MHz monopolar. US FDA GUDID entries: TT0.25F6-450 = eye tip 0.25 cm² · 450 REP, TT4.00F6-600 = TOTAL tip 4.0 cm² · 600 REP. Miso Clinic has neither Thermage nor Ultherapy.
- Fees and patient inducement — Medical Service Act Articles 45 (posting of non-covered fees), 27(3) (prohibition of inducement for profit) and 56(2) (prohibited advertising). That is why no price or discount appears in this column.
- Miso Clinic practice guidance — indication criteria, site-by-site design, and the explanation and consent procedure. This is the source for every sentence marked as clinical judgement.
Everything in this column is general information and does not replace medical diagnosis or treatment. Effects and side effects vary with individual skin condition, age and underlying illness, and the same result is not guaranteed for everyone. Any decision to proceed should be made in an in-person consultation with a physician.
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