To our knowledge, it is for the first time that a PCLbased dermal filler has been compared with a NASHAbased filler for efficacy and safety in the treatment of NLFs. Efficacy of the fillers was determined using the WSRS and GAIS rating system.
Results from our GAIS ratings show that the PCLbased dermal filler has greater esthetic improvements in the treatment of NLFs over the NASHA-based filler at 6, 9, and 12 months after initial treatment. The largest improvements of the PCL-treated NLFs over the NASHA-treated NLFs were seen at month 9 and 12. At these time points, results showed 41% (9 months post-treatment) and 20% (12 months post-treatment) TMI for the NLFs treated with the PCL-based dermal
filler while at the same time points, 0% TMI in GAIS scores were found for the NASHA-treated NLFs. These results indicate that the PCL-based dermal filler has prolonged esthetic improvement over this commonly used NASHA-based dermal fillers.
In addition, similar results were found with our obtained mean WSRS scores showing significantly higher esthetic improvement for PCL-treated NLFs compared with NASHA-treated NLFs at 6, 9, and 12 months after initial treatment.