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Found 7 results

  1. Version 1.0.0

    2 downloads

    This model is the left leg skin rendering of a 65-year-old male with left thigh myxoid fibrosarcoma. At the time of diagnosis, the patient had metastases to his lungs. The patient therefore underwent neoadjuvant radiotherapy, surgery, and adjuvant chemotherapy and was found to have an intermediate grade lesion at the time of diagnosis. The patient is still living with the metastatic disease at 2.5 years since diagnosis. This is an STL file created from DICOM images of his CT scan which may be used for 3D printing. Landmarks of the lower extremity consist of bony and muscular landmarks. Proximally, the extensor mechanism consists of the quadriceps tendon, patella, and the tibial tuberosity, which is located on the anterior proximal tibia, where the patellar tendon attaches. On the anteromedial surface of the tibia is Gerdy's tubercle, where the sartorius, gracilis, and semitendinosus attach. Laterally, the head of the fibula may be palpated, which is the attachment for the posterolateral corner structures of the knee joint. The peroneal nerve wraps around the fibular neck, and a tinel’s sign may be elicited due to its superficial position at this location. Distally, the anterior ankle joint may be palpated. Pain with palpation may be indicative of osteoarthritis if general or an osteochondral defect if localized. The medial and lateral malleoli are located on either side of the tibiotalar joint, respectively and are the site of common ankle fractures. Posteriorly, the Achilles tendon inserts on the calcaneus. A defect along this tendon may be a sign of a tendon rupture. The superficial peroneal nerve can possibly be isolated on the lateral aspect of the dorsal foot with full plantarflexion of the fourth ray. Topographical landmarks of the foot and ankle consist of muscular, tendinous, and bony structures. Proximally, the superficial muscles of the anterior (tibialis anterior), lateral (peroneals) and posterior (gastrocnemius) compartments may be palpated. Anteriorly, the tibialis anterior tendon crosses the ankle joint and is used as a landmark for ankle joint injections and aspirations, where the practitioner will place the needle just lateral to the tendon. Posteriorly, the gastrocnemius and soleus converge to form the Achilles tendon. Ruptures of the tendon as well as tendinous changes due to Achilles tendinopathy may be palpated. At the level of the ankle joint, the joint line, medial malleolus (distal tibia) and lateral malleolus (distal fibula) may be palpated. The extensor hallucis longus and extensor digitorum longus tendons are visible at the surface of the dorsal foot. The extensor digitorum brevis muscle belly is seen on the dorsum of the lateral foot. On the plantar foot, the plantar fascia may be palpated. Nodules associated with plantar fascial fibromatosis may be palpated here. Plantar fasciitis is also diagnosed when pain is associated with palpation of the insertion of the plantar fascia on the medial heel. Other common pathologies on the plantar foot are ulcerations associated with diabetic neuropathy and other neuropathic conditions. This model was created from the file STS_022.

    Free

  2. Version 1.0.0

    54 downloads

    This model is the right knee bone rendering of a 65-year-old male with left thigh myxoid fibrosarcoma. At the time of diagnosis, the patient had metastases to his lungs. The patient therefore underwent neoadjuvant radiotherapy, surgery, and adjuvant chemotherapy and was found to have an intermediate grade lesion at the time of diagnosis. The patient is still living with the metastatic disease at 2.5 years since diagnosis. This is an STL file created from DICOM images of his CT scan which may be used for 3D printing. The knee is composed of 3 separate joints: two hinge joints (medial and lateral femorotibial joints), and one sellar, or gliding, joint (the patellofemoral joint). These also compose the three compartments of the knee: medial, lateral, and patellofemoral. Although the knee is thought of as a hinge joint, it has 6 degrees of motion: extension/flexion, internal/external rotation, varus/valgus, anterior/posterior translation, medial/lateral translation, and compression/distraction. To provide stability to the joint, static and dynamic stabilizers surround the knee, including muscles and ligaments. The major ligaments that provide stability to the knee include the anterior cruciate ligament (ACL), posterior cruciate ligament (PCL), lateral (or fibular) collateral ligament (LCL), and medial collateral ligament (MCL). The ACL prevents anterior translation of the knee and the PCL prevents posterior translation of the knee. The LCL prevents varus stresses and the MCL prevents valgus stresses on the knee. Furthermore, the medial meniscus is a secondary stabilizer to anterior translation and is therefore commonly injured during an ACL tear or after an untreated ACL tear. This model was created from the file STS_022.

    Free

  3. Version 1.0.0

    1 download

    This model is the bilateral thigh rendering of a 49-year-old male with a right medial thigh undifferentiated pleomorphic malignant fibrous histiocytoma (MFH). The patient underwent neoadjuvant radiotherapy, surgery, and adjuvant chemotherapy treatment and was found to have a high-grade lesion at the time of diagnosis. Metastases to his lungs were also found at diagnosis. The patient is still living with the disease at 2 years since diagnosis. This is an STL file created from DICOM images of his CT scan which may be used for 3D printing. Undifferentiated pleomorphic MFH has more recently been classified as Undifferentiated Pleomorphic Sarcoma. This is the most common soft tissue sarcoma in late adulthood, commonly occurring between 55 to 80 years old and most commonly in Caucasian males. Clinically, it presents as a slow growing mass in the extremities. Biopsy of the lesion demonstrates, as its name implies, an undifferentiated and pleomorphic appearance. Pleomorphism is the pathologic description of cells and nuclei with variability in size, shape and staining, which is characteristic of a malignant neoplasm. “Undifferentiated” means that the tissue does not appear like an identifiable tissue structure. Treatment consists of wide resection and radiation. Chemotherapy is added in cases of metastasis, most commonly to the lung. Five-year survival is between 35-60% depending on grade of tumor and metastases. This model was created from the file STS_021.

    Free

  4. Hello everyone, For a friend of mine (a digestive surgeon), I'd like to print a colon, so he can help his patients to visualize this part of their anatomy and the surgery they will undergo. Does someone know where I can find a 3D model of this organ ? I'm new in 3D software and not able to generate it from a scan by myself. :-/ Thank you very much for your help. Jean-Christophe
  5. Here is my print of Dr. Mike's splenic artery aneurysms model. I used my Ultimaker 2 and Colorfabb XT clear filament. Print time was 7 hours. The model came out more of a milky translucent color than clear but I imagine you would still be able to see a catheter snaking through. The print isn't as refined as Dr. Mike's Shapeways model, but for a consumer level printer, not too bad! Here is the print with the support structure in place. The Cura program the Ultimaker uses to slice the model seems to generate nice, easily removable support. I just used the generic settings. I spent around 10 minutes cleaning up the model. As far as I can tell, the interior walls of the artery printed out fairly smooth. I was a little concerned because no support could be used for the interior.
  6. ebaumel

    Screen shot path support

    From the album: ebaumel Blog images

    The G-code file of a 3D model of an CT angiogram of an abdominal aortic aneurysm in the Cura software, showing the support structure for a 3D print.

    © Copyright ©2015 Eric M. Baumel, MD

  7. The idea of using 3D printers to create prosthetic hands is not new. Using a 3D printer a prosthetic hand can be created for $50 which is pennies compared to the cost of a traditional prosthetic hand. However, these devices are only designed for people with missing hands or missing fingers. This led a student at Rochester Institute of Technology to create the Airy Arm. The Airy Arm is designed for those who have their hands but do not have function in them. It is a sort of exoskeleton that goes around the outside of the arm and hand. By using movements of the elbow the exoskeleton is able to assist a hand that cannot move on its own to perform basic functions. The design uses no electricity and is very simple to use. In fact the design was created to help a child who suffered from paralysis of the wrist and hand. When the elbow bends a hinge pulls on cables attached to the fingers and forces the hand to close. When the elbow is straightened the strings on the outside of the fingers are pulled, causing the hand to open back up. http://3dprint.com To create the Airy Arm the design is first printed flat using polylactic acid. The plastic mold is then dipped in hot water and molded around the person’s arm. This allows the arm to be perfectly molded to the individual so that it is comfortable enough for long term use. The device is currently just a prototype but already there has been plenty of positive response and interest. The hope is that it can be used for a wide range of individuals from paralysis and stroke victims to those suffering from arthritis. Main Image Credit: 3dprint.com
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