Recently, Renishaw released a new case study on the recent metal 3D printing project, which will help medical professionals at the University Hospital of Wales (UHW) rebuild cancer patients with diarrhea.
Dr. Cellan Thomas, an oral and maxillofacial surgeon, and Dr. Liam Addy, a dental consultant, are responsible for the treatment of oral cancer in men aged 60 years. Their plan was to reconstruct the left side of the lower jaw with two sections harvested from the humerus bone. To do this, they need a mandibular plate implant to maintain a healthy part of the humerus to achieve bone healing.
During Thomas and Eddie, strict measures were taken to control the process and the surgical environment, choosing to create 3D printed implants and cutting and drilling guides. In the meantime, they also pioneered a new way of preoperative preparation and UHW surgery. Surgery like this is rare and requires a team of 10 medical professionals.
Dr. Thomas realized that 3D printing can meet their requirements, including accuracy, strength, flexibility and more. Their plan is to make three cutting and drilling guides, as well as mandibular implants.
“Most hospitals still rely mainly on internal repair teams to make their own implants using traditional methods. Renishaw pointed out in their case studies that forming and welding complex components may pose a risk of component shedding during surgery. “UHW is unwilling Increase this risk. In contrast, additive manufacturing allows for the specific and complex geometry of each component to be manufactured and manufactured in a single piece. "
Thomas and Addy and the International Center for Design and Research (PDR), the world's leading Cardiff City University design and application research department, and Renishaw's precision additive manufacturing and assistance in completing digital workflow sequences. The 3D program is part of the success of the treatment, and the medical team uses the CAD/CAM suite. Converting CT information using Materialise Mimics software and then transferring the data to FreeRorm Plus software is a favorite of PDR researcher Dr. Dominic Eggbeer. Dr. Eggbeer likes to use FreeForm very much, so he describes it as "digital clay."
Then the processing will be completed. The stl file was sent to the Renishaw factory outside Cardiff. The five components were printed with titanium in their AM250 additive manufacturing system and tested in accordance with ISO 10993 Part 1.
PDR also helped Dr. Thomas create a three-dimensional design cutting guide to remove bone and vascular tissue sections.
Renishaw pointed out: "The cutting guide for precise printing only needs to install the humerus in one position, and the matching surface of the guide perfectly outlines the temporary screw for the tibia to fix the guide in place.
“These guidelines include an innovative design assembly function that includes a guide hole drilled in the correct position on the bone segment and the remaining mandibular segments to obtain the final set screw. These will be fully aligned with the final fixation of the mandible implant. position."
In the operating room, the tibia and tissue are attached to the existing portion of the jaw and the implant is screwed into place.
Renishaw said in their case study: "The bones are perfectly assembled." Use the screw holes aligned with the pre-drilled guide holes in each of the four sections of the new one to screw the disk into place.
After a few weeks of successful surgery, the patient actually recovered very well and is now getting married. Once the bones are fused together, he can perform restorative dental procedures with implants and bridges.
Ed Littlewood, marketing manager at Renishaw Medical Dental, said: "This is a good way to apply precision engineering best practices to hospital applications, bringing better, more predictable results to patients and hospital teams, and saving overall costs. example of.
Most importantly, the patient's surgery was very successful. At the same time, the cost savings and time in the operating room (one or two hours) are considerable.
“This case shows the smart use of additive manufacturing in the operating room. It shows how pre-planning can save surgery time,†Dr. Eggbeer said.
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