Studying Dynamics of Mid-face Lifting During Hyaluronic Acid Filler Injection Using Ultrasound Imaging.

[BACKGROUND] The ageing in the mid-face involves volume deficiency in multiple anatomical units, including the zygomatic arch, infraorbital region, medial and lateral cheek and nasolabial fold (NLF). Hyaluronic acid (HA) is extensively used in the minimally invasive procedures of mid-face rejuvenation.

[OBJECTIVES] MD Codes is proposed to perform combined treatment of multiple sites to reduce treatment variability and increase clinician success rates. Although the detailed procedure of this technique, aesthetic effects and complications have been disclosed, its anatomical information has yet to be discussed. This paper elaborated on the static and dynamic anatomical characteristics of MD Codes through cadaveric dissection and ultrasound imaging.

[METHODS] Anatomical dissection and ultrasound imaging help us look back on the injection methods and anatomical principles of MD Codes.

[RESULTS] The treatment is threefold: (1) the bolus injections, for lifting purposes, are performed at the most depressing point along the zygomatic arch, zygomatic eminence, the prominent optimal point in the zygomatic region, the most depressed point of upper NLF with 0.2-0.3 ml HA. (2) The linear injections, featuring facial contouring refinement, are performed at the deep fat pad of the medial cheek and infraorbital region with 0.4 ml HA. (3) The linear injections, featuring volume replacement, are performed at the subcutaneous fat layer of lateral cheek and NLF with 0.8 and 0.4 ml HA.

[CONCLUSIONS] MD Code is led by the principle of "less dosage and better effect", and a special injection sequence is formulated based on the anatomical characteristics. Ultrasound is a useful tool to make for a dynamic anatomical understanding of MD Code and visualize the anatomical information such as layers and thicknesses.

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