1.Preoperative evaluation error

Chin consists of mandible, muscle and soft tissues, and there may be asymmetry before the surgery, so there is basically a chance of surgery failure when using the bilateral symmetry artificial implant.

2.Using artificial implants that are too large or too small

Whether it is silicone, Gortex or artificial bone, if there is error in the assessment, no matter what the material is, the surgery is destined to fail.

3.displacement of artificial implant

Since the artificial implants cannot perfectly fit everyone's mandible, coupled with the muscle contraction, and there is a possibility for the artificial implants to displace.

To solve the abovementioned problems, Charm United developed a customized chin augmentation method.

At present, the only material for human body artificial implant that can combine with 3D design technology is the bone cement. It is made of PVP (Povidone) and is commonly known as the “bone cement.” It is a biomaterial that is used to fill the gaps between the bone and implant or the bone cavity, with a self-curing property. Its chemical name is polymethylmethacrylate (PMMA), also known as acrylic acid bone cement. Since Charney first used the bone cement to fix the femoral prostheses in a successful total hip arthroplasty in 1958, it has been widely used in clinical orthopedic surgeries.

The patient can communicate with the surgeon based on his/her demands at the first clinic, and the surgeon can use the 3D simulation software to simulate what the patient wants or what the surgeon can achieve. If it is acceptable to the patient, a facial CT scan of the patient will be taken and 3D software will be used to simulate the facial bone model of the patient. For example, for chin augmentation surgery, after the patient undergoes CT scan, the surgeon will first simulate the length and thickness that the patient wants to add on his/her chin on the photo in the computer. The computer engineers will then simulate the position, thickness and height of artificial chin bone according to the surgeon's instructions.

The patient is this case study had undergone silicone chin implant surgery, but he was unsatisfied with the results of surgery, thinking that his chin does not reach the length you want. Therefore, the surgeon advised him to do a CT scan first to see the current status of his chin. The result of CT scan showed that the position of the silicone implant had shifted and no longer extended along the chin. Furthermore, the material was not suitable and could not fit along his palatine and facial bones, so his chin not only did not extend but instead tangle into one piece. After communicating with the patient, the surgeon used 3D software to simulate the position, thickness and height of the artificial chin bone, and then designed a chin model specifically for that patient. It ended up creating the ideal good-looking chin that he wanted.

The pre-operative 3D computerized CT scan allowed the patient to see the position of the original implant.

This is the 7.0mm thick artificial chin bone that the computer engineer helped design after conducting the 2D simulation with the patient.

This is the 5.0mm thick artificial chin bone that the computer engineer helped design after conducting the 2D simulation with the patient.


The computer engineers simulate various sizes of artificial chin bones, and the surgeon uses those simulated models to communicate with the customers.

Surgical results

The above is purely a case description, and the actual situation will vary from person to person.

The patient in this case study had undergone silicone chin implant surgery, and after the surgery, his chin became too large and he felt his face became very masculine, which was very different from the chin shape of Fan Bingbing that he originally asked for. Therefore, our surgeon advised him to do a sophisticated computerized CT scan to see the current status of his chin. The result of the CT scan showed that the silicon implant was both too large in size and placed in a wrong angle, so his chin became extremely obvious. After communicating with the patient, our surgeon decided to use 3D software to accurately simulate the position, size and angle of the new chin, using artificial bone cement to design the chin model specifically for the patient, so as to create the delicate V-shaped facial line that he wanted.

This is the artificial chin bone that the computer engineer helped design after conducting the 2D simulation with the patient.

The artificial chin bone designed by a computer engineer for the patient.

Surgical results

The above is purely a case description, and the actual situation will vary from person to person.