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3D printing fracture

Yang Ju, Heping Xie, Xi Zhao, Lingtao Mao, Zhangyu Ren, Jiangtao Zheng, Fu-Pen Chiang, Yongliang Wang, Feng Gao
Quantitative visualization and characterization of stress-field evolution during fracture rapid growth is critical for understanding the mechanisms that govern the deformation and failure of solids in various engineering applications. However, the direct capture and accurate characterization of a rapidly-changing stress field during crack propagation remains a challenge. We report an experimental method to quantitatively visualize and characterize rapid evolution of the stress-field during crack propagation in a transparent disc model containing a penetrating fusiform crack...
March 12, 2018: Scientific Reports
Figen Govsa, Mehmet Asim Ozer, Huseyin Biceroglu, Asli Beril Karakas, Sedat Cagli, Cenk Eraslan, Ahmet Kemal Alagoz
BACKGROUND: Transarticular screw fixation has fatal complications such as vertebral artery (VA), carotid artery and spinal cord injuries. The landmarks for deciding the entry point for C1 lateral mass screws were clarified by using life-size three dimensional (3D) patient specific spine models. METHODS: This study included a total of 10 patients with C1 fractures. Dual CT scan data from C1 pre and post screwing of them were modified into 3D patient specific life-size cervical spine models...
March 3, 2018: World Neurosurgery
João C Boga, Sónia P Miguel, Duarte de Melo-Diogo, António G Mendonça, Ricardo O Louro, Ilídio J Correia
The incidence of fractures and bone-related diseases like osteoporosis has been increasing due to aging of the world's population. Up to now, grafts and titanium implants have been the principal therapeutic approaches used for bone repair/regeneration. However, these types of treatment have several shortcomings, like limited availability, risk of donor-to-recipient infection and tissue morbidity. To overcome these handicaps, new 3D templates, capable of replicating the features of the native tissue, are currently being developed by researchers from the area of tissue engineering...
February 21, 2018: Colloids and Surfaces. B, Biointerfaces
Jian-Tao Liu, Feng Zhang, Zheng-Chao Gao, Bin-Bin Niu, Yu-Huan Li, Xi-Jing He
Artificial vertebral body has achieved good results in treating spinal tumors, tuberculosis, fracture and other diseases. Currently, artificial vertebral body with variety of kinds and pros and cons, is generally divided into two types: fusion type and movable type. The former according to whether the height could be adjusted and strength of self-stability is divided into three types: support-fixed type, adjust-fixed type and self-fixed type. Whether the height of self-fixed type could be adjusted is dependent on structure of collar thread rotation...
December 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Yi Zheng, Xin-Hua Yuan, Wei-Bin Wang, Qing-Song Fu, Qing-Jiang Pang
OBJECTIVE: To evaluate the efficacy and advantages of personalized 3D printing-guided template of lateral superior ramous of pubic intramedullary lag screw. METHODS: From July 2015 to December 2016, 20 patients with the superior and inferior ramous of pubis fracture were treated with lag screws placement. All the patients were divided into test group(with guided template) and control group(with general operation). There were 7 males and 3 females with an average age of (46...
October 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Bill Oxley
OBJECTIVE: To report the use of a 3-dimensional (3D)-printed patient-specific reduction guide system to facilitate minimally invasive plate osteosynthesis (MIPO) of a humeral fracture in a cat. STUDY DESIGN: Case report. ANIMALS: A 9-year-old male neutered domestic short hair cat weighing 4.4 kg. METHODS: A 9-year-old male domestic short hair cat was presented with a comminuted, mid-diaphyseal left humeral fracture. Computed tomographic data were processed to yield 3D mesh representations of both humeri and subsequently manipulated in computer-aided design software...
February 15, 2018: Veterinary Surgery: VS
Andrew C Daly, Pierluca Pitacco, Jessica Nulty, Gráinne M Cunniffe, Daniel J Kelly
Bone tissue engineering strategies that recapitulate the developmental process of endochondral ossification offer a promising route to bone repair. Clinical translation of such endochondral tissue engineering strategies will require overcoming a number of challenges, including the engineering of large and often anatomically complex cartilage grafts, as well as the persistence of core regions of avascular cartilage following their implantation into large bone defects. Here 3D printing technology is utilized to develop a versatile and scalable approach to guide vascularisation during endochondral bone repair...
February 1, 2018: Biomaterials
Yu-Chen Wang, Yong Ma, Wei-Zhong Yu, Yun-Feng Li, Yan-Hui Liu
OBJECTIVE: To investigate the computer-assisted virtual reduction combined with 3D printing technique as preoperative planning and assess their therapeutic effects. METHODS: Thirty-five cases of acetabular fracture treated by internal fixation from March 2011 and March 2014 were retrospectively analyzed. All patients underwent operations with internal fixations implanted. The patients were divided into 2 groups according whether they used the computer-assisted virtual reduction combined with 3D printing technology...
July 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Fernando Blaya, Pilar San Pedro, Julia López Silva, Roberto D'Amato, Enrique Soriano Heras, Juan Antonio Juanes
The traditional fabrication process of custom-made splints has hardly undergone any progress since the beginning of its use at the end of the eighteenth century. New manufacturing techniques and the new materials can help to modernize this treatment method of fractures. The use of Additive Manufacturing has been proposed in recent years as an alternative process for the manufacture of splints and there has been an increase in public awareness and exploration. For this reason, in this study a splint model printed in 3D, that replaces the deficiencies of the cast maintaining its virtues, has been proposed...
February 5, 2018: Journal of Medical Systems
Ton Tran, Bernard K Chen, Xinhua Wu, Chung Lun Pun
BACKGROUND: Repair of peri-prosthetic proximal tibia fractures is very challenging in patients with a total knee replacement or arthroplasty. The tibial component of the knee implant severely restricts the fixation points of the tibial implant to repair peri-prosthetic fractures. A novel implant has been designed with an extended flange over the anterior of tibial condyle to provide additional points of fixation, overcoming limitations of existing generic locking plates used for proximal tibia fractures...
February 2, 2018: Injury
Dominique Misselyn, Stefaan Nijs, Steffen Fieuws, Eman Shaheen, Tim Schepers
We examined the added value of 3-dimensional (3D) prints in improving the interobserver reliability of the Sanders classification of displaced intraarticular calcaneal fractures. Twenty-four observers (radiologists, trainees, and foot surgeons) were asked to rate 2-dimensional (2D) computed tomography images and 3D prints of a series of 11 fractures, selected from cases treatment at our level I trauma center between 2014 and 2016. The interobserver reliability for the Sanders classification was assessed using kappa coefficients...
February 1, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
Kristopher M Day, Paul M Phillips, Larry A Sargent
We describe a case of complex, posttraumatic skull and orbital deformities that were evaluated and treated with advanced computer technology, including virtual surgical planning, three-dimensional (3D) modeling, and printed patient custom implants (PCI) fabricated by 3D printing. A 50-year-old man presented to our craniofacial referral center 1 year after failed reduction of complex left orbital, zygomatic, and frontal bone fractures due to a motorcycle collision. The patient's chief complaint was debilitating diplopia in all fields of gaze...
March 2018: Craniomaxillofacial Trauma & Reconstruction
Lalit Maini, Tarun Verma, Amit Sharma, Ankur Sharma, Abhishek Mishra, Sunil Jha
BACKGROUND: Acetabular fractures are amongst the most challenging fractures to treat because of complex anatomy. Open reduction and internal fixation remains the standard treatment for displaced acetabular fractures to achieve anatomical reduction as in any other intra-articular fracture. Patient-specific pre-contoured reconstruction plate template made by a pre-operative virtual surgical planning can be useful to respect patient's morphology, reduce surgical invasiveness and simplify the surgical procedure...
January 24, 2018: Archives of Orthopaedic and Trauma Surgery
Justin A Smith, Vanessa P Ho, Christopher W Towe
BACKGROUND: Open reduction and internal fixation of rib fractures is recommended to decrease mortality, shorten the duration of mechanical ventilation, and lower hospital length of stay. Prosthetic titanium plates are frequently used to repair chest wall trauma, and are typically contoured to the patient's anatomy at the time of implant in the operating room. We describe the use of 3-dimensional (3D) digitally corrected rapid prototyping to generate a model of a patient's skeletal anatomy for the purposes of preoperative customization of standard titanium plates for fixation of rib fractures...
January 1, 2018: Surgical Innovation
Christian Schulze, Markus Weinmann, Christoph Schweigel, Olaf Keßler, Rainer Bader
The application of Ti-6Al-4V alloy or commercially pure titanium for additive manufacturing enables the fabrication of complex structural implants and patient-specific implant geometries. However, the difference in Young's modulus of α + β-phase Ti alloys compared to the human bone promotes stress-shielding effects in the implant-bone interphase. The aim of the present study is the mechanical characterization of a new pre-alloyed β-phase Ti-42Nb alloy for application in additive manufacturing. The present investigation focuses on the mechanical properties of SLM-printed Ti-42Nb alloy in tensile and compression tests...
January 13, 2018: Materials
Zhenfei Huang, Wenhao Song, Yaoshen Zhang, Qiang Zhang, Dongsheng Zhou, Xi Zhou, Yu He
Conventional education results in unsatisfactory morphological understanding of acetabular fractures due to lack of three-dimensional (3D) details and tactile feedback of real fractures. Virtual reality (VR) and 3D printing (3DP) techniques are widely applied in teaching. The purpose of this study was to identify the effect of physical model (PM), VR and 3DP models in education of morphological understanding of acetabular fractures. 141 students were invited to participate in this study. Participants were equally and randomly assigned to the PM, VR and 3DP learning groups...
2018: PloS One
B-J Kwon, G M Seon, M H Lee, M-A Koo, M S Kim, D Kim, J-J Han, D Kim, J Kim, J-C Park
Osteoporosis is a disease characterized by low bone mass, most commonly caused by an increase in bone resorption that is not matched by sufficient bone formation. The most common complications of postmenopausal osteoporosis are bone-related defects and fractures. Fracture healing is a multifactorial bone regeneration process, influenced by both biological and mechanical factors related to age, osteoporosis and stability of the osteosynthesis. During the treatment of bone defects in osteoporotic conditions, imbalanced bone remodeling is the leading cause for implant failure...
January 12, 2018: European Cells & Materials
Yi Zheng, Xin-Hua Yuan, Wei-Bin Wang, Qing-Jiang Pang
OBJECTIVE: To investigate the feasibility of a drill template for the placement of reverse intramedullary lag screws on the outside of the pubis based on digital design and 3D printing technology. METHODS: The preoperative CT images of a 23-year-old male patient with pelvic fracture were collected retrospectively. According to the Young and Burgess classification, the type of pelvic fracture was LC IIwith the 3D printing technology. The data was reconstructed by 3D imaging reconstruction software to produce 1:1 three dimensional model...
January 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Ji Wan Kim, Yongkoo Lee, Joonho Seo, Jai Hyung Park, Yong Min Seo, Sung Soo Kim, Hyun Chul Shon
BACKGROUND: To report our experiences with the use of three-dimensional (3D) printing in the field of orthopedic trauma. METHODS: This retrospective study enrolled 24 patients from three university teaching hospitals in whom 3D printing technique was applied: 14 patients with acetabular fractures and 10 patients with clavicular shaft fractures. We summarized our experiences with 3D printed bone models. RESULTS: Three-dimensional printed acetabular models improved understanding of complex acetabular anatomy and fracture pattern to plan the optimal positioning of a reduction clamp and the trajectory of screws...
January 8, 2018: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
Helin Xing, Jinshuang Wu, Lei Zhou, Sefei Yang
RATIONALE: With respect to improving the quality of oral rehabilitation, the management of keratinized mucosa is as important as bone condition for implant success. To enhance this management, a natural teeth-retained splint based on a patient-specific 3-dimensional (3D) printed mandible was used in vestibuloplasty to provide sufficient keratinized mucosa around dental implants to support long-term implant maintenance. PATIENT CONCERNS: A 28-year-old male patient had a fracture of the anterior andible 1 year ago, and the fracture was treated with titanium...
December 2017: Medicine (Baltimore)
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