The application status of 3D printing orthopedic titanium alloy medical devices

Due to its good biocompatibility, excellent corrosion resistance and low modulus of elasticity, titanium alloys are widely used in orthopedic medical devices. 3D printed orthopedic titanium alloys are mainly used for orthopedic implants, such as orthodontic arch wires, surgical stents, active catheters, spinal fracture fixation, maxillofacial implants, patella claw long bone plates, etc.
Thirteen patients with distal humeral fractures were randomly selected to use traditional steel plates or 3D printed steel plates for surgery. X-rays and 3D reconstruction CT were used to assess osseointegration, and a goniometer was used to assess the range of motion. After 6 months, the operation time and elbow function of the two groups were compared. The results showed that the average operation time of the 3D printing group was significantly shorter than that of the traditional printing plate group. And the ratio of good elbow joint function in the 3D printing group was higher than the ratio of good elbow joint function in the control group. Due to the use of 3D printed guide plates, the efficiency of the operation is greatly improved.
3D printed custom-made intervertebral fusion cages were used to treat deformity correction secondary to osteoporotic fractures. First, computer simulations based on preoperative CT imaging were carried out to design custom titanium alloy prostheses and receptor endplates that adapt to depressions. And loss of vertebrae. The design is converted into an implantable titanium alloy cage through 3D printing. During the operation, a close fit between the implant and the target intervertebral disc is achieved. The postoperative CT scan confirmed excellent implant endplate matching and restored disc space loss. The patient started walking on the first day after surgery and was followed up six months later to record evidence of intervertebral fusion.
Using SLM technology to design and manufacture customized titanium mesh trays to treat severe maxillofacial trauma caused by falling from a height. The 3D printed mesh tray is used as an intraoperative template and a carrier for bone grafting. The healing process was smooth and good results were achieved. Combining virtual surgery with 3D printing technology enables surgeons to visualize before surgery and reduce surgery time, so that precise repairs can be made and efficiency improved.
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