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First Ever Documented Total Calcaneus Replacement with 3D Printed Metallic Implant for Chronic Osteomyelitis after a calcaneal fracture in a Young, Healthy Individual—A Literature Review and Preliminary Case Report

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Open Journal of Orthopedics 2023年第5期13卷 195-204页

作者： Leslie H. Pyle Mica Murdoch Ashley McClain Kyle Yi Town Square Family Foot Care Coralville Iowa USA Broadlawns Medical Center Des Moines Iowa USA

Osteomyelitis of the calcaneus can be a limb threatening diagnosis, which is typically treated with antibiotic therapy with or without partial resection of the bone. Extensive infection of the bone commonly results in limb amputation via transtibial or transfemoral amputation, which can increase morbidity and mortality. This case report involves a 29-year-old male who sustained bilateral calcaneal fracture after a fall, who developed osteomyelitis of the right calcaneus after being treated with internal/external fixation and antibiotic therapy. In order to preserve the limb total calcaneal replacement with 3D printed implant was done.

关键词： Osteomyelitis calcaneal Replacement 3D Implant calcaneal fracture Below Knee Amputation

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The sustentaculum tali screw fixation for the treatment of Sanders type Ⅱ calcaneal fracture:A finite element analysis

The sustentaculum tali screw fixation for the treatment of S...

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2016年浙江省骨科学学术年会

作者： Qing-Jiang PANG Xiao YU Zong-Hui GUO 宁波二院

Objective In the surgery of calcaneal fracture,whether the sustentaculum tali screw should always be placed is widely *** aim of this study is to explore the necessity and function of the sustentaculum tali screw placement for the treatment of Sanders type □ calcaneal fracture. Methods The finite element analysis was used in this *** the establishment of the finite element model of Sanders type,calcaneal fracture,the two internal fixation simulations were *** one model, the AO calcaneal plate was simulated on the lateral side of the calcanues with 7 screws being fixated at different position of the plate,In the other model,the calcaneus was fixated with the same AO calcaneal plate together with an additional screw being infiltrated into the sustentaculum *** two models were simulated under the same loading and the displacement of the fracture line and the stress distribution in the two models were calculated respectively. Results The maximum principal stress focused on the cortical bone of sustentaculum tali in both of the models under the same *** displacement of the fracture line,the maximum principal stress of calcaneus and internal fixation system in the model with sustentaculum screw fixation were smaller than that in the model without sustentaculum screw *** stress in the model with sustentaculum screw fixation was more dispersed. Conclusions The placement of sustentaculum tali screw is essential for fixation of type II calcaneal fracture to achieve the biomechanical stability.

关键词： calcaneal fracture Sustentaculum tali Screws Finite element analysis Biomechanics

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The sustentaculum tali screw fixation for the treatment of Sanders type Ⅱ calcaneal fracture:A finite element analysis

The sustentaculum tali screw fixation for the treatment of S...

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2015年浙江省骨科学学术年会

作者： Qing-Jiang PANG Xiao YU Zong-Hui GUO Department of Orthopedics Center Ningbo No.2 Hospital

Objective In the surgery of calcaneal fracture,whether the sustentaculum tali screw should always be placed is widely *** aim of this study is to explore the necessity and function of the sustentaculum tali screw placement for the treatment of Sanders type Ⅱ calcaneal *** The finite element analysis was used in this *** the establishment of the finite element model of Sanders type Ⅱ calcaneal fracture,the two internal fixation simulations were *** one model,the AO calcaneal plate was simulated on the lateral side of the calcanues with 7 screws being fixated at different position of the plate,In the other model,the calcaneus was fixated with the same AO calcaneal plate together with an additional screw being infiltrated into the sustentaculum *** two models were simulated under the same loading and the displacement of the fracture line and the stress distribution in the two models were calculated *** The maximum principal stress focused on the cortical bone of sustentaculum tali in both of the models under the same *** displacement of the fracture line,the maximum principal stress of calcaneus and internal fixation system in the model with sustentaculum screw fixation were smaller than that in the model without sustentaculum screw *** stress in the model with sustentaculum screw fixation was more *** The placement of sustentaculum tali screw is essential for fixation of type Ⅱ calcaneal fracture to achieve the biomechanical stability.

关键词： calcaneal fracture Sustentaculum tali Screws Finite element analysis Biomechanics

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Biomechanical comparison of locking plate and crossing metallic and absorbable screws fixations for intra-articular calcaneal fractures

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Science China(Life Sciences) 2016年第9期59卷 958-964页

作者： Ming Ni Duo Wai-Chi Wong Jiong Mei Wenxin Niu Ming Zhang Tongji Hospital Tongji University School of Medicine Shanghai 200065 China Pudong New Area People's Hospital Shanghai 201299 China Interdisciplinary Division of Biomedical Engineering The Hong Kong Polytechnic University Hong Kong SAR China Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center) Shanghai 201619 China

The locking plate and percutaneous crossing metallic screws and crossing absorbable screws have been used clinically to treat intra-articular calcaneal fractures, but little is known about the biomechanical differences between them. This study compared the biomechanical stability of calcaneal fractures fixed using a locking plate and crossing screws. Three-dimensional finite-element models of intact and fractured calcanei were developed based on the CT images of a cadaveric sample. Surgeries were simulated on models of Sanders type III calcaneal fractures to produce accurate postoperative models fixed by the three implants. A vertical force was applied to the superior surface of the subtalar joint to simulate the stance phase of a walking gait. This model was validated by an in vitro experiment using the same calcaneal sample. The intact calcaneus showed greater stiffness than the fixation models. Of the three fixations, the locking plate produced the greatest stiffness and the highest von Mises stress peak. The micromotion of the fracture fixated with the locking plate was similar to that of the fracture fixated with the metallic screws but smaller than that fixated with the absorbable screws. Fixation with both plate and crossing screws can be used to treat intra-articular calcaneal fractures. In general, fixation with crossing metallic screws is preferable because it provides sufficient stability with less stress shielding.

关键词： finite-element analysis in vitro experiment calcaneal fracture plate fixation absorbable screw biomechanics

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A Biomechanical Comparison of Conventional versus an Anatomic Plate and Compression Bolts for Fixation of Intra-articular calcaneal fractures

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2012年第4期32卷 571-575页

作者：王海立杨朝旭吴战坡陈伟张奇李明李智勇张英泽 Department of Orthopedics 3rd HospitalHebei Medical University

The purpose of this study was to compare the biomechanical stability obtained by using our technique featured an anatomical plate and compression bolts versus that of the conventional anatomic plate and cancellous screws in the fixation of intraarticular calcaneal *** fresh frozen lower limbs of cadavers were used to create a reproductive Sanders type-Ⅲ calcaneal fracture model by using *** calcaneus fractures were randomly selected to be fixed either using our anatomical plate and compression bolts or conventional anatomic plate and cancellous *** of fracture was evaluated through X *** calcaneus was successively loaded at a frequency of 1 Hz for 1000 cycles through the talus using an increasing axial force 20 N to 200 N and 20 N to 700 N,representing the partial weight bearing and full weight bearing,respectively,and then the specimens were loaded to *** extracted from the mechanical testing machine were recorded and used to test for difference in the results with the Wilcoxon signed rank *** significant difference was found between our fixation technique and conventional technique in displacement during 20-200 N cyclic loading(P=0.06),while the anatomical plate and compression bolts showed a great lower irreversible deformation during 20-700 N cyclic loading(P=0.008).The load achieved at loss of fixation of the constructs for the two groups had significant difference:anatomic plate and compression bolts at 3839.6±152.4 N and anatomic plate and cancellous screws at 3087.3±58.9 N(P=0.008).There was no significant difference between the ultimate *** technique featured anatomical plate and compression bolts for calcaneus fracture fixation was demonstrated to provide biomechanical stability as good as or better than the conventional anatomic plate and cancellous screws under the axial *** study supports the mechanical viability of using our plate and compression bolts for the fixatio

关键词： calcaneal fracture anatomic plate fixation compression bolts conventional screws biomechanical testing

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