Introduction. Fretting crevice-corrosion (tribocorrosion) of metallic biomaterials is a major concern in orthopedic, spinal, dental and cardiovascular devices. 1.
Objectives. Screw plugs have been reported to increase the fatigue strength of
Background. Intramedullary nailing is a widely accepted treatment method for femoral fractures. Failure of locking screws is often a threatening complication, particularly on comminuted fractures. For comminuted fractures, the locking nails are load-bearing devices. The load transfer between fractured fragments is made through especially the locking screws for these load bearing situations. Nonunion, malunion, delayed union, shortening, and nail migration are the expected results if early failure of locking screws is present with comminuted fractures. In this study our aim was to compare the bending resistance of titanium and
Using an osteotomy of the olecranon as a model of a transverse fracture in 22 cadaver elbows we determined the ability of three different types of suture and
Introduction/Aims. The Exeter Stem can be used with metal femoral head that are made of either cobalt chrome, or
Relatively high rates of fracture of the femoral stem of total hip replacements were seen with early designs manufactured with
Objectives: The purpose of this biomechanical study was to compare the mechanical properties of locked nails and screws made from either
A report published in 1999 showed that whether
An experimental study is reported of fracture healing in the femora of 36 Beagle dogs, comparing the results of using
Background: Paediatric spinal systems made from
Introduction and Aims: Zirconia heads were introduced into hip replacement surgery with in vitro reports of lower wear on polyethylene compared with metal. Over 400,000 zirconia heads have been implanted worldwide and yet clinical studies have varied in their results. The aim of this study was to compare the radiological wear rate of zirconia and
Introduction: Long bone fracture treatment with interlocking intramedullary nails is associated with long operative procedures, re-operations and long periods of infirmity. We assessed the clinical and economical factors associated with tibial fracture fixation with interlocking nails in comparison to fixation with an expandable
Background: Tension Band wiring technique is commonly used to treat transverse patella fractures. The commonly used configuration has parallel K wires and a
Background. Currently, stailess steel, titanium and carbon-fiber reinforced polyetheretherketone (CF-PEEK) plates are available for the treatment of distal radius fractures. Since the possibility to create a less rigid fixation may represent an advantage in case of ostheoporotic or poor quality bone, the aim of this study is to compare the biomechanical properties of these three materials in terms of bending stiffness with a single static load and after cyclical loading, simulating physiologic wrist motion. Materials and Methods. Three volar plating systems with fixed angle were tested: Zimmer
Introduction. The most common treatment options for fixation of osteoporotic distal femur fractures are retrograde nails and locking plates. There are proponents of more elastic titanium plates as well as more rigid steel plates; No clear superiority of one over the other has been established. We aimed to evaluate the mechanical differences between
Introduction: Biomaterial implants in the human body constitute passive surfaces that are prone to bacterial adhesion as the on-set of biomaterials-associated infection. Antibiotic treatment of infected biomaterial implants is little successful clinically, because the biofilm-mode of growth protects the adhering organisms. Percutaneous implants, such as bone screws used in orthopedics or dental implants, constitute a special class of implants with infection rates exceeding the infection rate of deep body implants by far. Especially fixation frames, used in orthopedic surgery for the treatment of complicated fractures, inevitably become infected during the course of a treatment. The aim of this study is to determine whether it is possible to stimulate bacterial detachment from surgical
Introduction: There are more than 60 different hip prostheses currently available for total hip replacement (THR). Cemented prostheses make up about 90 to 95% of current total UK market. The cost of THR prosthesis varies widely with some prostheses cost 5 times more than others. Furlong
In a preliminary experiment the paired radii and femora of dogs were tested for bone mineral mass and mechanical properties including the load at break, the ultimate bending strength and the modulus of elasticity; symmetry was observed for most of the parameters determined. The influence of the elasticity of materials used for the internal splintage of bone and its relationship to bone remodeling were then investigated for
Movement between an implant surface and overlying soft tissue gives rise to fibrous capsule formation with a liquid filled void. Clinically, this situation is more prevalent with electropolished
Innovative nanocomposite carbon coating doped with Si can significantly improve the osseintegration of orthopaedics implants. Additionally, this kind of coating increases the mechanical resistance of the implants, what is especially important on case of joints (frictional pairs). Use of layers of carbon-doped silicon, which leads to the synthesis of layers improving mechanical and biological characteristics, let obtain good strength by volume features. Suitable introduction to the structure of amorphous silicon dioxide layer allow for the production of higher adhesion to metallic substrates and consequently the increased thickness and hardness. The increased thickness of the layer leads to a stronger diffusion barrier to harmful metal ions from the implant material and thus consequently improving the biocompatibility of the implant. Moreover, a silicon beneficial effect on stress relaxation layer formed during the synthesis. This allows for improved biocompatibility, also affects other property obtained in the case of silicon carbide layers, the bacteriastability. This further protects the surface of the implant against the risk of bacterial colonization in both the implantation and subsequent use in the body, and preferably suppressing inflammation and faster healing of surgical wounds. The thus obtained product is much better than the biological and mechanical parameters of currently offered.Summary Statement
Introduction