Breast augmentation, the most common cosmetic surgery procedure, has a high level of postoperative patient satisfaction, yet is still plagued by problems due to implants. Patients seeking breast augmentation surgery are often thin, with a relative lack of sternal stems and subcutaneous soft tissue adjacent to the sternum, making the medial edge of the implants visible and the breasts separated, which affects aesthetics. The earlier controversial fat grafting, because of its safety and effectiveness, has now become an important tool to improve the results of breast reconstruction and cosmetic surgery, both as a substitute for prosthesis in ideal cases and to correct the shape defects after implantation of prosthesis. A new idea has recently emerged to combine both autologous fat grafting and implantation for breast augmentation surgery, i.e., composite breast augmentation. In order to verify the aesthetic value of selective parasternal fat grafting for breast augmentation and its safety. Dr. Brovo from Spain conducted the experiment and published it in the latest issue of Plastic and Reconstructive Surgery. A total of 59 patients with similar medical conditions participated in the study, 38 of whom underwent implant placement only, while the remaining 21 had 60 to 140 ml of autologous centrifugal fat particles injected into the subcutaneous soft tissue of the pectoralis fascia, along with implant placement. The volume of fat used in each case was determined by a combination of preoperative subcutaneous soft tissue tension, thickness, prosthesis size, and available fat volume in the donor area. There was no significant difference in the size of the implants used between the two groups. The questionnaire showed that the smaller the distance between the medial edges of the breast, the more aesthetically pleasing the breast would be, so this spacing was used as an indicator to assess the appearance of the breast. The values were recorded for each case before surgery and the data were compared before and after surgery at a one-year follow-up. The spacing was significantly lower in the group that underwent composite augmentation, and significantly higher in the group that underwent implantation alone. No complications such as hematoma, infection, or wound dehiscence were evident. This study confirms that performing parasternal fat grafting in conjunction with breast implant augmentation is safe and effective and can greatly enhance postoperative breast appearance. By filling with fat, the implant edges are not exposed, the transition between the medial mammary gland and the sternal area is natural, and the breasts are not separated due to the distance between them, resulting in a more natural result. Because the patient is thin, the inner edge of the implant is obvious after implantation, so it is an indication for composite augmentation, which is especially suitable for second-stage surgery.