Next-Gen Implants: The Latest Advancements In Biocompatible Materials For Orthopedics

Millions of people all over the world are living with metal implants inside their bodies as they’re widely used in joint replacements, spinal surgery, and fracture repair, among other procedures. One study has found that there is a high prevalence of metal implants among US adults aged 40 and older, with 31 percent reporting the presence of screws, plates, or joint replacements in their bodies. Metal implants are designed to stay in the body forever, but most of them need to be replaced after 20 to 30 years, while others need to be removed if they loosen or if cause pain or infection. 

Getting metal implants can be costly, and the recovery process can take anywhere between three months to a year, depending on the type of procedure and the patient’s ability to heal. Thankfully, new developments in biocompatible materials may help to create longer-lasting implants, reducing the chances of implant replacement or removal for the rest of the patient’s life. 

3D-printed Metal Joints

Biocompatible metals like titanium and its alloys are the standard for orthopedic and dental implants since these are non-corrosive and non-toxic to human tissue. Titanium also has the ability to integrate with bone, and it’s much lighter than steel, making it ideal for hip replacements, knee joints, or bone screws. Sourcing materials from reputable US titanium suppliers is a must for the success of implant procedures. Doing so also prevents the risks of complications, such as implant rejection or blood contamination that can cause health issues like tissue damage.

To improve fit and prevent long-term complications, doctors are now using 3D-printed metal joints in orthopedic surgeries like hip and knee replacements. According to orthopedic specialist Dr. Attaallh Alrefaee, the shift towards 3D printing within orthopedics can enhance treatment precision and patient care while allowing customization of medical implants. “This method is now widely regarded as a cutting-edge approach, particularly when compared to the methods that were prevalent just a few years ago,” he adds. With the precise fit of 3D implants, surgeons can now reduce operation times, which lowers the risk of complications from lengthy invasive procedures. 

Dissolvable Implants for Bone Repair

Most metal implants will cause discomfort at some point due to misalignment, nerve irritation, or sensitivity to the material. But what if there was an implant that completely dissolves to hold fractured bones together? This is what researchers from Monash University in Australia has recently developed as they have created a zinc-based dissolvable material that’s strong enough to support fractured bones, but gentle enough to degrade overtime. The zinc alloy is designed as an alternative to conventional metal implants that often require follow-up surgery or realignment, but the material has yet to be tested on people to observe how it degrades inside the human body. 

Bioinspired Materials

Metals used for orthopedic implant surgeries are considered to be generally safe, but there’s always the risk of Adverse Local Tissue Reaction wherein the immune system can react negatively to metal particles. This may cause symptoms like pain, swelling, or the formation of non-cancerous masses which can affect surrounding bone and tissue. As a way to prevent ALTR, researchers have developed bioinspired materials to mimic the composition and function of human tissue, making them more flexible and biocompatible than traditional implant materials. One such material is silk fibroin, which can be used to create biodegradable screws and plates for bone repair. It can also be used as coating for dental implants, as well as to construct scaffolds for skin and nerve generation, making it an ideal material to treat burn victims. 

The advancement of biocompatible materials is changing orthopedics, making implants safer, more durable, and less likely to cause infection or discomfort. These developments are sure to overcome the limitations of traditional implants, which can lead to enhanced healing, lower surgery costs, and improved patient experience.