| Kim8) (2025) | Q-switched Nd:YAG 1,064㎚ (non-ablative fractional mode; 7㎜ spot; 2.07–2.59J/㎠; 5–7㎐; 1–2 passes until petechiae) | Yeona Pharmacopuncture™(PDRN 2 ㎖/vial; 34G×2㎜; intradermal injection after laser) | Follow-ups at 1 and 5 months showed progressive improvement |
| Rho9) (2018) | 1,064㎚ fractional picosecond Nd:YAG laser (Discovery Pico™, Quanta System, Italy); 8㎜ microlens array handpiece; fluence 0.7J/㎠; multiple passes until petechiae | Rejuran™ (long-chain polynucleotide gel, 20㎎/㎖); 0.05㎖ × 10 points intradermally using 33G needle immediately after laser | Six sessions at 3-week intervals; follow-up at 2 months after final session showed marked improvement |
| Ahn10) (2021) | 1,064㎚ nanosecond-domain Nd:YAG laser (Miin™, LTRA Global, Korea) with microlens array (MLA) handpiece; energy 700mJ; spot size 10㎜; 140 microbeams/spot; microbeam energy 5mJ; fluence 1.79J/㎠; frequency 5㎐; 3 non-stacking passes | Placentex® (PDRN, PharmaResearch, Korea); 0.3㎖ total injected intralesionally (3 points) using 31G syringe | Median 2 sessions (range 1–5) at 1-month intervals |
| Shin11) (2023) | CO2 fractional laser (eCO2™, Lutronic, Korea); 10,600㎚ wavelength; pulse energy 30mJ; density 100 spots/㎠ | Placentex® (PDRN, PharmaResearch, Korea); 0.5㎖ total injected intradermally (0.1㎖ per point, 5 points, 1㎝ interval) after each laser session | Six sessions at 4-week intervals |
| Jung12) (2023) | Case 1: CO2 fractional laser (Fraxis Duo™, Ilooda, Korea); 10.2mJ pulse energy, 0.34㎳ pulse duration, 1.81% coverage.Case 2: 1,927㎚ non-ablative fractional laser (Fraxel SR™, Reliant Technologies, USA); 60mJ pulse energy, 304MTZ/㎠ | Recovery Injection™ (PDRN, Kyoungbo Pharmaceutical, Korea); 1㎖ intralesional injection every 6–8 weeks | Case 1: 10 sessions (6-week interval)Case 2: 7 sessions (8-week interval) |
| Wang13) (2023) | 1: 10,600㎚ CO2 laser (KL-R™, Keying Laser Co., China) for post-acne scars2: 1,927㎚ thulium laser (Clear + Brilliant™, Solta Medical, USA) for wrinkles, pores, and melasma; 1–3 passes per session | PDRN topical solution (3㎖/vial; Changzhou Birui Medical Tech, China; manufactured in Korea); applied immediately after laser each session | Three monthly sessions over 3 months |