Military Technology

“For example, in the field of medical technology, we have successfully developed intelligent bionic human organs, such as intelligent bionic artificial hearts, intelligent bionic electronic prosthetic eyes, and intelligent bionic electronic prostheses, etc.

Since their development, these intelligent bionic artificial organs and tissues have saved the lives of thousands of patients, and have successfully helped tens of thousands of physically disabled patients, allowing them to see the light again, regain their limbs, and be able to normal life.

For example, our breakthroughs in human cell tissue cloning and biological 3D printing technology can help many disfigured patients regain their physical appearance, and can also help many athletes or ordinary people disabled due to ligament rupture to resume playing on the field. Return to normal life.

For example, some time ago, we accepted an outstanding athlete from our country. She is a champion carefully cultivated by the national team. Both leaders and coaches are very optimistic about her.

Unfortunately, during a training session, the ligament was torn and the injury was very serious. Under normal circumstances, immediate surgical repair is required. Even if the operation is successful, it will require a long period of recovery training, but even then it may not be possible to return to the game. Because the damage to the injured ligament is irreversible, surgery can only try its best to repair it, but cannot restore it to its original state.

In fact, there are many such examples. Many of the outstanding athletes at home and abroad we know had to leave the field and retire due to injuries.

Now, we have a new treatment method, which is to use bio-3D printing technology to re-print a complete ligament for her. "

"Reprint a ligament?" Jiang Nan looked surprised.

Wu Hao smiled and nodded and said: "Yes, we will print a new ligament for her, then implant it into the injured position to replace the broken ligament.

Although it is so simple, it is difficult to achieve this step.

First, we need to extract somatic cells from the patient's ligament and then clone them. The whole process may take a week to half a month before we can clone and culture a sufficient amount of cells.

We will then inject these cells into our bio-printer to prepare for subsequent 3D printing.

But before printing, we need to conduct an MRI scan of the patient's damaged ligament, then build an accurate digital model, then modify this model, and then import it into the bio-3D printer, which is the template for its printing.

Next, we need to 3D print cells according to this template. The entire printing process is actually very simple. It is to arrange these cells in the order of the ligament cell tissue and then arrange and superimpose them layer by layer to print them out. "

"Is this successful?" Jiang Nan interjected and asked.

Wu Hao smiled and shook his head: "It's not that simple. The survival time of cells like this is limited, just like our amputated limb transplants. The limbs that can be removed from the body cannot exceed a certain time. Once this time is exceeded, , then the cells of the entire amputated limb may die, thus affecting the success rate of transplantation and the recovery of the amputated limb function.

The same goes for the printed ligament tissue, and the problem of its preservation must be solved.

We know that 3D printing is a very demanding process, and the same is true for bioprinting. A small ligament like this may take several days or even a week. How to ensure its survival is also a problem we need to study and solve.

At present, the medical community mainly uses two methods to preserve such transplanted organs: low temperature and injection of preservatives. However, these two methods can also last for dozens of hours. This is not enough now.

Therefore, we can only find another way and think about it again. We have established an artificial placenta system in the printing chamber of the biological 3D printer. This system is like the placenta in the mother's body. It can always provide the nutrients needed for the cells of the ligament tissue being printed and ensure their survival.

In this way, we can achieve long-term and large-scale tissue printing, so that we can print more and larger organs and tissues to treat and save more people. "

At this point, Wu Hao breathed a sigh of relief and then said: "Currently, this athlete has undergone ligament transplant surgery and is observing the recovery period. If there are no problems, she can then conduct some adaptive training.

However, we still recommend that she refrain from engaging in strenuous exercise, at least for now. "

"Why, hasn't the transplant operation been completed and new ligaments replaced?" Jiang Nan asked a little puzzled.

Wu Hao smiled and shook his head: "New ligaments have been replaced, but there is still a big difference between the printed ligaments and the patient's original ligaments. This difference may not be obvious to ordinary people, because ordinary people People do not train with such high intensity, so the ligaments have not undergone any high-intensity stretching exercises, so the direct difference between the old and new ligaments is not obvious.

But it's different for athletes. Previous high-intensity training has made their ligaments stronger than those of normal people, making them stronger and stronger. It is precisely because of this that it can support athletes in high-intensity and strenuous exercises that break through the limits of the human body.

The new ligaments are printed and have not undergone long-term training in this area. This difference is like beef tendon and beef tenderloin.

Therefore, athletes also need a longer training process after completing ligament implant replacement surgery. And this process cannot be rushed. It needs to be done step by step and cannot be rushed. "

"But the peak of an athlete's career may only be a few years. If this is the case, doesn't it mean that she has to say goodbye to the competition." Jiang Nan said with a look of regret.

Wu Hao smiled and shook his head: "Not necessarily. The key depends on the athlete's efforts and determination. If she wants to persevere, she can persist for as long as she wants. Theoretically, as long as she makes unremitting efforts and is no longer injured, she is Can return to the physical condition before the injury.

But if she does not undergo ligament transplant replacement surgery, then she will no longer have the capital and conditions to work hard again. So the specific choice depends on the athletes themselves. We just provide them with one more choice. "

"I believe that the vast majority of athletes will choose to undergo such surgery, because they will definitely not be willing to say goodbye to the competition." Jiang Nan concluded with a smile at him.