special screws and connecting rods were designed and manufactured. They had the advantage of having a smooth platform, which could fit with strain gauges. According to the FE analysis results, the design position of the platform was set to the stress concentration area included...
[22], again in esthetic medicine, were able to achieve at least partial pain relief by using different needle gauges; in their study, an assessment of the multiple-injection process demonstrated a significant difference in pain level, favoring their very thin 33 G needle. Motivated by such ...