Sixty-two patients with femoral fractures treated conservatively have been studied over an interval of 1 to 6 years. Rotational deformity was assessed by a radiological method of anteversion measurement. The degree of rotational deformity following fracture ranged from 10 degrees to 33 degrees in just over one-third of the whole group; by later assessment there was no evidence of spontaneous co...

AUTOMATED THA PLANNING: DETERMINATION OF STEM ANTEVERSION ANGLE USING STATISTICAL PREDICTION Yuki Nakanishi MS*, Yoshiyuki Kagiyama PhD, Futoshi Yokota PhD, Masaki Takao MD, Takeshi Ogawa MD, Nobuhiko Sugano MD, Yukio Tada PhD, Yoshito Otake PhD, Yoshinobu Sato PhD * Graduate School of System Informatics, Kobe University, Kobe, Japan 2 Interdisciplinary Graduate School of Medicine and Engineeri...

BACKGROUND Some studies have previously shown that geometry of proximal femur can affect the probability of fracture and type of fracture. It happens since the geometry of the proximal femur determines how a force is applied to its different parts. In this study, we have compared proximal femur's geometric characteristics in femoral neck (FNF), intertrochanteric (ITF) and Subtrochanteric (STF) ...

The purpose of this study was to investigate the relationship between femoral neck version and pre- and intraoperative findings in hips with femoroacetabular impingement (FAI). The authors retrospectively reviewed prospectively collected data on 188 patients (204 hips) who underwent hip arthroscopy for FAI and labral pathology. Femoral version was measured on magnetic resonance imaging by a fel...

Effective lubrication performance of metal-on-metal hip implants only requires optimum conformity within the main loaded area, while it is advantageous to increase the clearance in the equatorial region. Such a varying clearance can be achieved by using non-spherical bearing surfaces for either acetabular or femoral components. An elastohydrodynamic lubrication model of a novel metal-on-metal h...

Using radiography and computer tomography (CT) we studied the morphology of 83 hips in 69 Caucasian adults with osteoarthritis secondary to developmental dysplasia of the hip (DDH). A previously published series of 310 hips with primary osteoarthritis was used as a control group. According to the Crowe classification, 33 of the dysplastic hips were graded as class I, 27 as class II and 23 as cl...

Torsional problems of the femur have been traditionally treated by a proximal osteotomy with internal fixation. We elected to perform femoral derotational osteotomies distally. Between September 1994 and April 2001, supracondylar osteotomies were performed on 38 femora in 21 children with torsional and angular deformities. The average age was 9 years (range 5-15 years). Twenty-three femora had ...