The influence of pregnancy on bone tissue metabolism is not completely understood. Caffeine also has a potentially negative influence on bones. The aim of this study was the evaluation of changes in the bones of pregnant rats under the influence of caffeine. The experiment was carried out on Wistar rats. The evaluation of rats' bone tissue quality was performed based on bone density measurement...

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 ...

PURPOSE To study the course of L4 to S3 nerve roots and their distance with the ala of the sacrum and the sacroiliac joint. METHODS The embalmed left half pelvis of 25 male and 27 female cadavers aged 30 to 91 (mean, 68) years were studied. The ventral rami of the L4, L5, S1, S2, and S3 nerve roots were dissected along their courses from the corresponding intervertebral foramina to the lesser...

INTRODUCTION There is a lack of data in the literature for determining the influences of the extensor portion of the gluteus maximus muscle on pelvic tilting and, thus, on lumbar stability. OBJECTIVES To assess the influences of the extensor portion of the gluteus maximus muscle on pelvic tilt. METHODS Ten healthy young subjects were recruited, with a body mass index (BMI) below 24.9 kg/m(2...

[Purpose] This study aimed to introduce an approach of pelvic suspension (PS) using sling cords and to obtain evidence for changes in respiratory function of healthy subjects. [Subjects and Methods] Subjects were 25 healthy men. In the supine position, with hip and knee joints flexed at 90°, the subjects' pelvises were suspended with sling belts. Diaphragm excursion, respiratory function, and r...

This paper presents personalized simulations of eleven isolated pelvic bones under lateral impact and a generic 50 percentile male pelvic bone model based on these simulations. Eleven pelvises were solicited by metallic spheres in the acetabulum, which were impacted by a falling mass of 3.68 kg at a speed of 4 m/s. Each pelvis test was then modeled individually, taking into account its proper g...

BACKGROUND The cementless fixation technique in total hip arthroplasty (THA) was developed to solve clinical problems such as aseptic loosening and osteolysis which were thought to be associated with the use of bone cement. This retrospective study reports our mid-term results with cementless THA. METHODS A series of 173 consecutive, unselected cementless THA procedures using the Omnifit pros...

OBJECTIVES Sagittal alignment of the lumbosacral spine, and specifically pelvic incidence (PI), has been implicated in the development of spine pathology, but generally ignored with regards to diseases of the hip. We aimed to determine if increased PI is correlated with higher rates of hip osteoarthritis (HOA). The effect of PI on the development of knee osteoarthritis (KOA) was used as a negat...

BACKGROUND The modular hemipelvic prosthesis has been used in patient of Type I-IV pelvic tumor with good outcomes, but how to keep the stability between the prosthesis and the residual sacrum is a problem. An additional screw-rod system seems to solve it, but its biomechanical characters are still not well understood, which need experimental evaluation. METHODS Six pelvic specimens were prep...