3D printed orthopedic implants are more “fitting”

  Orthopedic implants are a general term for a large class of implants that replace, repair, supplement and fill human bones. They are used for the maintenance, support and repair of human bones. They are currently commonly used clinically in orthopedic medical materials. In recent years, the clinical application of orthopedic implants has become more and more extensive, providing a more advantageous weapon for the treatment of orthopedic diseases.
There are 3 types of implants

  According to the description of the key monitoring varieties of medical devices by the National Food and Drug Administration, orthopedic implants are mainly classified as follows: surgical implants, joint prostheses; metal straight and special-shaped bone plates; metal bones, orthopedic nails; metal orthopedic use Rods; intramedullary needles, bone needles; spinal internal fixation equipment. However, this classification method is not often used in orthopedics clinical work and academic exchanges, and is mostly divided into three categories: trauma, joint, and spine.
  Trauma: mainly used for the reduction, fixation and functional exercise of various fracture injuries caused by accidents such as traffic accidents and falls. Mainly divided into internal fixation system and external fixation bracket. The former is divided into steel plate system and intramedullary nail system. The steel plate includes tension band, compression, locking, neutralization, support, non-slip, bridging, etc.; external fixation bracket has bone plate And bandages.
  Spine: mainly for the correction, reduction, fusion and multi-stage internal fixation of diseases such as spinal system deformities, congenital scoliosis, degenerative lumbar disc disease, degenerative thoracolumbar scoliosis, etc. The materials used are similar to trauma products. Mostly stainless steel, titanium alloy, etc. The design of spine products is expected to be used for a short time, usually several months, and can be taken out after the patient’s autogenous bone fusion is stabilized. Treatment methods include conservative treatments such as medication, physical therapy, rest and stents, as well as surgical internal fixation, vertebroplasty and minimally invasive interventional therapy.
  Joints: Applicable symptoms are joint diseases such as arthritis, bone hyperplasia, rheumatism, bone tumors and bone defects around joints, especially the elderly and excessive sports injuries. Artificial joints mainly include artificial knee, hip, elbow, shoulder, finger and toe joints. Joint products need to be implanted into the human body for a long time, and the expected useful life is more than 20 years. Therefore, there are extremely high requirements for the material performance of the implant and the simulation of the physiological joint motion and function of the human body.
3D printing is more “close to the body”

  The artificial joints currently in clinical use will suffer from wear of the prosthesis, osteolysis around the prosthesis, and aseptic loosening of the prosthesis. The 3D printing technology that has emerged in recent years can well solve the above problems.
  In the past, some implants were manufactured by casting or traditional metal processing methods, and a mold had to be manufactured first. For implants that only require one piece or a small amount of implants, the production cost per piece is very expensive. Coupled with the high price of the biocompatible implant material itself, the total manufacturing cost of orthopedic implants is very expensive. For special implants with complex structures, traditional techniques are also difficult to achieve. 3D printing technology is used to manufacture orthopedic implants, which can effectively reduce the manufacturing cost of customized and small batch implants, and can manufacture more complex implants.
  In addition, the implants manufactured by 3D printing technology can be customized individually, which shortens the adaptation phase of the patient’s pain and tension; and the optimally fitting size also reduces the difficulty of the operation and reduces the pressure on the surgeon.
Watch out for adverse events

  In recent years, as the clinical application of orthopedic implants has become more and more extensive, its adverse events have also shown a trend of increasing year by year, mainly in three aspects-
  the inherent risks of the product: any medical device product has certain Use risk, the medical device approved for marketing is only a “risk acceptable” product, and orthopedic implants are no exception.
  Performance, functional failure or damage: When orthopedic implants are used in accordance with product performance specifications and meet their requirements, they may also malfunction or be damaged and fail to achieve the desired function.
  Risks during surgery: The most important thing is to ensure “sterile” during the use of implants. Once infection occurs during orthopedic implant surgery, due to the formation of surface biofilm, bacteria are planted on the implant and are not affected by antibiotics, which will bring great difficulties to the treatment, cause the operation to fail, and cause pain to the patient.
  In order to avoid unacceptable risks, orthopedic implant manufacturers and hospital surgeons must establish a scientific and strict quality management system.