We report an unusual complication of late dislocation of a total hip replacement. The femoral stem had completely migrated from the shaft. The insertion of a new long-stem prosthesis was successful.

BACKGROUND The aim of this study is to determine the functional long-term outcome after non-operative and operative treatment of radial neck fractures in adults. METHODS Thirty-four consecutive patients with a mean age of 46.4 (18.0 to 63.0) years with a fracture of the radial neck who were treated between 2000 and 2014 were examined regarding the clinical and radiological outcome. Twenty pat...

in this paper, the effects of transverse cracks on rotating shaft were studied. according to earlier works, crack shaft failure decrease the critical speed of the shaft and also exhibit a nonlinear vibration behaviour leading to increases the amplitude of 1x and 2x harmonics (first and second order of rotational speed in torsional vibration). this suggests that the application of order analysis...

Robots promise to enhance minimally-invasive surgery, but flexion of the thin instrument shaft introduces error into models of the robot kinematics. Visual or electromagnetic tracking of the instrument tip provides correct forward kinematics, but uncertainty in shaft bending and port location leaves residual errors in inverse kinematics. These errors can cause incorrect motions that preclude th...

In this paper, the effect of footing shape resting on dry sand when subjected to machine dynamic loading is experimentally investigated. A laboratory set-up was prepared simulate case at different operating frequencies. Nine models were tested examine effects combinations two parameters, including frequencies (0.5, 1, and 2 Hz) shapes (circular, square rectangular). The tests conducted under a ...

In this study, an analytical model is developed to study crack breathing behavior under the effect of crack location and unbalance force. Crack breathing behavior is determined using effectual bending angle by studying the transient change in closed area of the crack. The status of the crack of a balanced shaft is symmetrical about shaft rotational angle and the duration of each crack status re...

An optical-based motion sensing system has been developed for real-time sensing of instrument motion in micromanipulation. The main components of the system consist of a pair of position sensitive detectors (PSD), lenses, an infrared (IR) diode that illuminates the workspace of the system, a non-reflective intraocular shaft, and a white reflective ball attached at the end of the shaft. The syst...

Hierarchical radiosity provides a good model for the lighting of static scenes. But when an object moves, this model requires an update of all the lighting. In fact, thanks to space-time coherence, we just have to compute some of the geometry parameters (form factors). The problem is to determine which part of the hierarchy of links must change or not. A shaft is a practical mean to represent t...

external fluted feed rolls are commonly used in grain drills. the fluted feed roll meters a volume of seeds and does not singulate the seeds as do the precision planters; therefore, there will be inherent variation in the number of seeds delivered per unit of time. this research was conducted to investigate the effect of seed meter drive shaft and ground speeds and outlet positions in a grain d...

UNLABELLED Whether Gamma 3 fixation system is suitable for all intertrochanteric fractures is inconclusive. This paper analyzed the surgical complications of Gamma 3 intramedullary nail in the treatment of intertrochanteric fractures. METHODS A total of 186 cases were enrolled in the study including 115 males and 71 females. The surgical operations were performed in all cases and Gamma 3 intr...