摘要

Objectives: The needle-less syringe is revolutionary. It is very fast and has functions that cannot be done with manual injection. In particular, it can produce groundbreaking and good results in the treatment of acne scars. I would like to do a biopsy and show photos of the tissue reaction and discuss it together. Introduction: There are several ways to treat acne scar, including fractional laser, micro needling, and medications. The author would like to introduce a needle-free injection method using micro-droplets, which is dramatically more effective than existing methods. Materials / method: The efficacy and safety of using a needle-free injector for the treatment of acne scars has been demonstrated. Through cases presentation and analysis, this study aims to demonstrate the benefits of this advanced technology, which provides fast (10 injections per second), accurate and consistent injections and can control the depth and speed of the dermal layer. The authors also investigated the potential of needle-free injector to promote collagen production and tissue remodeling, especially with regard to the treatment of acne scars, through injection of various agents such CaHA,PDLLA,PLLA. Results: Active acne and acne scat were treated well after CAHA injection using needle free injector Conclusion: In conclusion, the needle-free injection method utilizing CaHA micro-droplets presents a promising advancement in the treatment of acne scars. Through this study, the efficacy and safety of this innovative approach have been demonstrated, showcasing its superiority over conventional methods. The rapid, precise, and consistent injections provided by the needle-free injector offer significant advantages in acne scar management. Moreover, the ability to control depth and speed within the dermal layer enhances treatment accuracy and efficacy.