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This paper presents a phantom study that was conducted for an ultrasound-guided shoulder arthroscopy navigation system. The navigation system uses a surface model generated from pre-operative computed tomography images, which has to be registered to the patient during the procedure. The goal of this study was to determine the optimal regions on the scapula bone of the shoulder to achieve an acceptable...
This paper presents a phantom study that was conducted for an ultrasound-guided shoulder arthroscopy navigation system. The navigation system uses a surface model generated from pre-operative computed tomography images, which has to be registered to the patient during the procedure. The goal of this study was to determine the optimal regions on the scapula bone of the shoulder to achieve an acceptable...
Tissue engineered constructs have the potential to be used as replacements for current bone graft technologies. One component necessary for bone tissue engineering is a readily available, osteogenic cell source. Human dermal fibroblasts may have the potential to differentiate along an osteoblastic lineage, making them a candidate for use in bone tissue engineering applications. The objective of this...
Tissue engineered constructs have the potential to be used as replacements for current bone graft technologies. One component necessary for bone tissue engineering is a readily available, osteogenic cell source. Human dermal fibroblasts may have the potential to differentiate along an osteoblastic lineage, making them a candidate for use in bone tissue engineering applications. The objective of this...
The widespread clinical implementation of hamstring tendon (HT) autografts for anterior cruciate ligament (ACL) reconstruction is currently limited by the unpredictable integration of the graft with subchondral bone and a lack of devices that are capable of promoting biological fixation of HT grafts to bone. The site of HT graft fixation within the bone tunnel has been identified as the weak point...
The widespread clinical implementation of hamstring tendon (HT) autografts for anterior cruciate ligament (ACL) reconstruction is currently limited by the unpredictable integration of the graft with subchondral bone and a lack of devices that are capable of promoting biological fixation of HT grafts to bone. The site of HT graft fixation within the bone tunnel has been identified as the weak point...
In this study, we report that the sequential application of physiologic deformational loading after culturing with the growth factor TGF-beta3 (for 2-3 weeks) yields significantly stiffer chondrocyte-seeded agarose constructs than cultures in which deformational loading was applied during the initial 2-3 week TGF-beta3 exposure period. Using this culture protocol, engineered constructs were found...
In this study, we report that the sequential application of physiologic deformational loading after culturing with the growth factor TGF-beta3 (for 2-3 weeks) yields significantly stiffer chondrocyte-seeded agarose constructs than cultures in which deformational loading was applied during the initial 2-3 week TGF-beta3 exposure period. Using this culture protocol, engineered constructs were found...
This paper reports a study on correlation comparison of the vertebral axial rotation relative to curvature and torsion of scoliotic spine. The goal of this study is to understand whether the vertebral axial rotation is more correlated to the curvature or to the torsion of the scoliosis spinal deformity. For this purpose, the simplified 3D spine models are constructed on the randomly chosen images...
This paper reports a study on correlation comparison of the vertebral axial rotation relative to curvature and torsion of scoliotic spine. The goal of this study is to understand whether the vertebral axial rotation is more correlated to the curvature or to the torsion of the scoliosis spinal deformity. For this purpose, the simplified 3D spine models are constructed on the randomly chosen images...
This paper presents an orthopedic stabiliser to be used for the treatment of periarticular fractures of the knee joint. The design of the device is documented by experimental research of the knee joint kinematics. Experimental and simulation research suggest the use of a four-bar linkage mechanism. This research has also made it possible to define the range of adjustment to adapt the stabiliser kinematics...
This paper presents an orthopedic stabiliser to be used for the treatment of periarticular fractures of the knee joint. The design of the device is documented by experimental research of the knee joint kinematics. Experimental and simulation research suggest the use of a four-bar linkage mechanism. This research has also made it possible to define the range of adjustment to adapt the stabiliser kinematics...
Restricted element study of the fracture healing by external fixation device was investigated. The analyses were performed under an axial and variable loaded boundary conditions. The effect of different fracture size and different distance between bone and the external fixator device on the stress distribution was investigated. The results show that stresses in the external fixator device are highest...
Restricted element study of the fracture healing by external fixation device was investigated. The analyses were performed under an axial and variable loaded boundary conditions. The effect of different fracture size and different distance between bone and the external fixator device on the stress distribution was investigated. The results show that stresses in the external fixator device are highest...
Fusion of multiple modalities has become an integral part of modern imaging methodology, especially in nuclear medicine where PET and SPECT scanning are frequently paired with computed tomography (CT). We have extended image fusion from the tomographic realm to planar imaging in 2 specific applications. In the first, we combine planar scintigraphic images with photographic images of the body part...
Fusion of multiple modalities has become an integral part of modern imaging methodology, especially in nuclear medicine where PET and SPECT scanning are frequently paired with computed tomography (CT). We have extended image fusion from the tomographic realm to planar imaging in 2 specific applications. In the first, we combine planar scintigraphic images with photographic images of the body part...
To build a biomechanical human model can make much sense for surgical training and surgical rehearse. Especially, it will be more meaningful to develop a biomechanical model to guide the control strategy for the medical robots in HIT-Robot Assisted Orthopedic Surgery System (HIT-RAOS). In this paper, based the successful work of others, a novel reliable finite element method based biomechanical model...
To build a biomechanical human model can make much sense for surgical training and surgical rehearse. Especially, it will be more meaningful to develop a biomechanical model to guide the control strategy for the medical robots in HIT-Robot Assisted Orthopedic Surgery System (HIT-RAOS). In this paper, based the successful work of others, a novel reliable finite element method based biomechanical model...
A parametric 2D finite element model was developed for lower cervical spine (C3-C7) in sagital plane in this research. Being parametric, this model facilitates making changes in the geometrical sizes as well as omitting or modifying some parts of it in order to build a new model with special purposes. Application of geometrical parameters, the values of which differ from one vertebra to the other...
A parametric 2D finite element model was developed for lower cervical spine (C3-C7) in sagital plane in this research. Being parametric, this model facilitates making changes in the geometrical sizes as well as omitting or modifying some parts of it in order to build a new model with special purposes. Application of geometrical parameters, the values of which differ from one vertebra to the other...
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