Acetabular component orientation is influenced not only by the orientation at which the surgeon implants the component but also the orientation of the pelvis at the time of impaction. Hence, the orientation of the pelvis at set-up and its movement during the operation are critically important. Using a validated photogrammetric technique, during 67 hip arthroplasties, we measured how 3 surgeons ...

A better understanding of the three-dimensional mechanics of the pelvis, at the patientspecific level, may lead to improved treatment modalities. Although finite element (FE) models of the pelvis have been developed, validation by direct comparison with subject-specific strains has not been performed, and previous models used simplifying assumptions regarding geometry 5 and material properties....

Generating consistent maximum ball velocity is an important factor for a baseball pitcher’s success. While previous investigations have focused on the role of the upper and lower extremities, little attention has been given to the trunk. In this study it was hypothesized that variations in pelvis and upper torso kinematics within individual pitchers would be significantly associated with variat...

Adolescent idiopathic scoliosis (AIS) is the most common form of scoliosis and usually affects young girls. Studies mostly describe the differences between scoliotic and non-scoliotic girls and focus primarily on a single set of parameters derived from spinal and pelvis morphology, posture or standing imbalance. No study addressed all these three biomechanical aspects simultaneously in pre-brac...

Conclusions and discussion At this stage, the following explanatory hypotheses can be drawn: Technical radiological differences (exposure, machine) Variation of pelvis positioning Postural changes influencing the pelvis Brace compression on the pelvis According to our study results, all of the hypotheses include data both in favor and against the reliability of the Risser sign. Since the Risser...

examination has been developed and given special attention very good results have been claimed. It is a method of examination which is likely to become increasingly useful in the future. The clinical assessment of disproportion therefore depends upon a careful examination of the maternal pelvis and of the foetal head followed by fitting the head into the pelvis. The size of the pelvis can be es...

The aim of this study was to examine the aetiology and response to treatment of a series of patients with pelvic osteomyelitis. Criteria for selection were multiple positive intra-operative cultures and/or a positive radiological diagnosis. Twenty patients met these criteria (age range: 21-78 years, mean = 46). Data was recorded on host status using the Cierny-Mader classification, neurological...

AIMS To ascertain the outcome associated with antenatal renal pelvis dilatation; to recommend guidelines for postnatal investigation and determine an upper limit of normal for the anterioposterior dimensions of the fetal renal pelvis. METHODS Infants whose antenatal ultrasound scan showed a fetal renal pelvis of 5 mm or greater were investigated using postnatal renal tract ultrasound and a mi...