Cement mortars loaded with Cr, Pb and Zn were modified by polymeric admixtures [chitosans with low (LMWCH), medium (MMWCH) and high (HMWCH) molecular weight and hydroxypropylchitosan (HPCH)]. The influence of the simultaneous presence of the heavy metal and the polymeric additive on the fresh properties (consistency, water retention and setting time) and on the compressive strength of the morta...

BACKGROUND AND PURPOSE Little is known about the mechanical stabilization afforded by new materials proposed for use with vertebroplasty. This comparative ex vivo biomechanical study was designed to determine the strength and stiffness of osteoporotic vertebral bodies (VBs) subjected to compression fractures and stabilized with bipedicular injections of Cranioplastic altered in a manner consist...

The Toxicity Leaching Characteristic Procedure (TCLP) is used by some to estimate the potential hazard that chemicals in solid wastes represent to public health and the environment. This use is done mechanically without understanding the origin of this procedure and the severe limitations and unreliability of this procedure in estimating public health and environmental hazards of the potentiall...

The long-term effects on solidification/stabilization (s/s) of the secondary wastes, resulting from the oxidative degradation of some solid cellulosic-based wastes, in Portland Cement (CEM I) have been investigated by X-ray diffraction (X-RD) and Fourier transform infrared spectroscopy (FT-IR) techniques. The effect of seven years leaching of the cemented waste forms obtained was carried out to...

INTRODUCTION Infected periprosthetic femoral fractures are among the most complex and significant complications of total hip arthroplasty (THA). We report the novel use of a temporary THA-like spacer for treating an infected periprosthetic femoral fracture after revision surgery using a long stem. CASE PRESENTATION We present a 72-year-old woman sustained a left infected periprosthetic femora...

AIM Vertebroplasty (VP) and kyphoplasty (KP) are minimally invasive methods for the treatment of vertebral compression fractures (VCF). In this study, we aimed to present our experience with VP and KP performed under local anesthesia and percutaneously. MATERIAL AND METHODS Between 2002 and 2008, 91 patients (total 112 vertebrae) with VCF due to osteoporosis, tumor and trauma underwent VP or ...

Solidia CementTM is a non-hydraulic cement composed primarily of low-lime containing calcium silicate phases such as wollastonite / pseudowollastonite (CaO·SiO2), and rankinite (3CaO·2SiO2). This contrasts the high-lime alite (3CaO·SiO2), belite (2CaO·SiO2), tricalcium aluminate (3CaO·Al2O3), tetracalcium aluminum ferrite (4CaO·Al2O3·Fe2O3), and gypsum (CaSO4·2H2O) phases that comprise ordinary...

BACKGROUND Although shoulder arthroplasty is an accepted treatment for osteoarthritis, loosening of the glenoid component, which mainly occurs at the bone-cement interface, remains a major concern. Presently, the mechanical effect of the cement mantel thickness on the bone-cement interface is still unclear. METHODS Finite element analysis of a prosthetic scapula was used to evaluate the effec...

Chromium is one of the 25 most widespread elements in the Earth’s crust and occurs as an indelible non-volatile trace element in raw materials used in cement clinker production (clay, limestone and iron additives in particular). Chromium in raw materials mentioned above is mainly in form of trivalent chromium. Naturally occurring chromium (III) is not initially harmful, since it is chemically s...

We evaluated the efficacy of a cement gun to improve the depth of cement penetration in total knee arthroplasty. Ninety-one consecutive patients from two hospitals were recruited for this study. For Group I cement was applied to the tibial baseplate and the proximal tibia with fingers. Group 2 had similar application of cement to the tibial baseplate but cement was pressurized into the proximal...