Abstract

Objectives: I will show you Sono-anatomy for the buttock injection. Introduction: The anatomy for buttock injection is simple. Under the fat, there is Gluteus-Maximus. When deep injection into the muscle, the muscle is-gonna contract, and the patient feels pain. The target tissue is the fat layer, not into the muscle. Under the Gluteus-Maximus, you have short piriformis muscle. It runs from sacrum to greater trochanter. It is an important landmark. Materials / method: To treat skin atrophy and discoloration, I inject in the-dermis, with dilution. To improve skin tightening or to treat skin fold, I injected filler into superficial fat layer under the dermis . For volumizing, I injected into deep fat layer under the superficial fascia. Results: SONO-image fi In the superficial layer, each fat lobule has cuboid shape, called "cuboid fat". This fascia looks like a honeycomb, called this "honeycomb fascia". Honeycomb fascia surround fat lobule tightly and hold the “dermis” tightly to the "superficial fascia". Superficial-fat layer is im-mobile and solid / to protect against external forces. This im-mobile space is named “protective adipo-fascial system (PAFS)’’ Deep-fat layer(red) is a mobile layer , to lubricate musculo-skeletal movement. Each fat lobule is flat and loose, called “flat fat .“lubricant adipo-fascial system (LAFS)’ Conclusion: Looking at upper layer, Superficial layer contains solid cuboid fat and honeycomb fascia. This layer is immobile structure, showing hardly stretched, compressed. Looking at , Deep fat layer is stretched and mobile structure. So, you better inject volumizing-filler in the deep fat layer