Dynamic Simulation of Biomechanical Behaviour of the Pelvis in the Lateral Impact Loads.

The objective of this study was to develop and validate a novel 3D dynamic model of a pelvic side-impactor system. The biomechanical responses of a pelvic flexible model (having .mnf file suffix) under the lateral impact load for predicting the bone fracture mechanism are investigated as well.

True compression of pelvic fractures under lateral impact.

Purpose: To promote the understanding of pelvic fracture mechanism and make more accurate evaluation of maximal deformity at the moment of fracture, kinematic response of pelvis to lateral impact and the difference between peak and final displacement were investigated.

Methods: A total of three human cadaver pelves were seated uprightly on a sled test table, explored to horizontal lateral impact by a 22.1-kg impactor at a speed of 5.

[Biomechanics and imaging evaluation on stable structure of pelvis].

The treatment of difficulty and prognosis of pelvic fracture are directly related to the pelvic girdle stability. Diagnosis of pelvic fracture is mainly imaging manifestations based on biomechanics of pelvic anatomy. With the progress of biomechanics experiment technology, previousopinion has changed, such as separation of symphysis pubis 2.

The safe screw path along inferior border of the arcuate line at acetabular area: an anatomical study based on CT scans.

Background: Misplaced screw during the internal fixation of acetabular fractures may penetrate the hip joint which might cause chondrolysis and traumatic osteoarthritis in the future. This study aims to acquire the safe path for screw insertion along inferior border of the arcuate line fixation route at acetabular area.

Methods: Computed tomography (CT) scans of 98 patients without pelvic trauma were rebuilt for three-dimensional models of pelvis.

Development of a surgical navigation system based on augmented reality using an optical see-through head-mounted display.

The surgical navigation system has experienced tremendous development over the past decades for minimizing the risks and improving the precision of the surgery. Nowadays, Augmented Reality (AR)-based surgical navigation is a promising technology for clinical applications. In the AR system, virtual and actual reality are mixed, offering real-time, high-quality visualization of an extensive variety of information to the users (Moussa et al.

[Application of free-form deformation algorithm in fast three-dimensional bone reconstruction].

This paper presents a unit free-form deformation (FFD) method applied to rapid three-dimensioanl (3D) bone reconstruction, which was based on traditional FFD. With the femur as an example, we reconstructed a 3D model of femur from two X-ray images and a standardized model by taking advantage of unit FFD algorithm. The X-ray images and its parameters were taken by C-arm device.

Low-dose three-dimensional reconstruction of the femur with unit free-form deformation.

Purpose: This paper describes a low-dose method for reconstructing three-dimensional models of femur, using a standard shape model (SSM) and two conventional x-ray images.

Methods: The x-ray images were taken in two orthogonal directions. The x-ray source and sensor configurations were documented.

[Fast 3D model reconstruction of scoliotic spine using two X-ray images].

A whole technical way of reconstructing 3D model of the scoliotic spine from two X-ray images was proposed. From the experimental results of 30 patients with mild to severe scoliosis, we can conclude that the accuracy of locating vertebrae is 0.5 mm, the orientation accuracy was 1.

Kinematics of lower limbs of healthy Chinese people sitting cross-legged.

Background: Sitting cross-legged as an activity of daily living and its kinematics have significantly different demands on the arthroplasty of hip and knee, which can be referred in the design of joint arthroplasty.

Objectives: The purpose of this study was to obtain the kinematics of the lower limb in Chinese people during cross-legged sitting.

Study Design: This study identified the necessary requirements for joint arthroplasty to carry out sitting cross-legged activity.

Kinematics of hip, knee, ankle of the young and elderly Chinese people during kneeling activity.

Objective: The purpose of this study was to measure the kinematics of the lower limbs of Chinese people during normal kneeling activity, as such data could be valuable in designing joint prosthesis and arthroplasty that meet the needs of Chinese citizens' daily activities.

Methods: Thirty young and twenty elderly Chinese participants with no personal history of joint diseases were recruited, and matched by age (average age: 23.8 years for the young group, 60.