Saturday, September 10, 2016

3D-Printed Custom Implant Helps Patient with Ossifying Fibroma.

A young woman of 32, who suffered from an ossifying fibroma tumor in her lower jaw has been giving a new lease of life by using 3d printing to correct the defect.The surgical team decided it was necessary to immediately resect the tumor and place a custom-made laser-sintered titanium implant in the patient’s mouth. Although the ossifying fibroma was benign and painless, these types of tumors can grow to very large proportions if left untreated. The result is a tumor filled with cementum (the calcified substance that anchors the teeth to the jawbone) which mostly occurs on the lower jawbone. The team started by taking CT scans of the patient, and converting them to a 3D model in Materialise Mimics. The resulting 3D models of the bone and tumor were used as input to plan the resection planes and design the according cutting guides. After virtually going through the surgery, an implant was designed to fit the gap perfectly. The guides and models were printed in plastic and the implant itself was 3D printed in titanium. The aim of this design was to fully cover the titanium frame and the bone around the dental implants with soft tissue. Because soft tissue does not attach itself to titanium, any exposure of the implant would lead to epithelial ingrowth around the implant. The result would be infection and eventually the loss of the implant. The surgery was carried out successfully. By using the cutting guides, the titanium implant fit perfectly after the tumor had been resected. Just 24 hours post-surgery, the patient was already able to move her jaw normally again. Phase two of the process was recently completed. The space maintainer was removed and the cage was filled with bone harvested from the iliac crest. The third phase will see the placement of the dental implant into the augmented bone. In the final phase, a denture will be placed into the implant. contributed by materialise.com

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