Aseptic loosening of the tibial component is the major complication of total knee arthroplasty There is an association between early excessive shear micromotion between the bone and the tray of the tibial component and late aseptic loosening. Using non-linear finite element analysis, whether a tibial tray with a circumferentially flanged rim and a mating cut in the proximal tibia could minimize bo

Data taken with positrons of different longitudinal polarisation states in collision with unpolarised protons at HERA are used to measure the total cross sections of the charged current process, e(+) p -> nu X, for negative four-momentum transfer squared Q(2) > 400 GeV2 and inelasticity gamma < 0.9. Together with the corresponding cross section obtained from the previously published unpolarised da

Purpose: To evaluate the characteristics of polycystic compared to normal ovaries using three-dimensional (3-D) power Doppler ultrasonography. Methods: We recruited 42 volunteers, all of whom were commencing IVF treatment. Each patient was examined in the cycle preceeding the start of drug therapy during the late follicular phase. IF eight or more subcapsular follicles of 2-8 mm in diameter in one

Sweden is perceived to be top ranking. and a 'role model', in terms of its volume of academic R&D. This perception is based on analyses using two standard indicators. We assess the validity of these and argue that institutional features skew the result in favour of a high ranking. Swedish academic R&D is more appropriately characterised as average. or below average. in terms of input and a

We report karyotypic features of 106 short-term cultured oral squamous cell carcinomas (SCC), 51 new and 55 previously reported cases, with clonal chromosome aberrations. The major cytogenetic findings were as follows: simple karyotypic changes were present in 38 cases (36%) and 68 tumors (64%) displayed complex karyotypes. The most common numerical changes were +7, +8, +9, +16, +18, +20, and -4,

The contractile and relaxant effects of the different P2 receptors were characterized in the rat isolated mesenteric artery by use of extracellular nucleotides, including the stable pyrimidines uridine 5'-O-thiodiphosphate (UDPbetaS) and uridine 5'-O-3-thiotriphosphate (UTPgammaS). The selective P2X receptor agonist, alphabeta-methylene-adenosine triphosphate (alphabeta-MeATP) stimulated a potent

Gelatin, derived from the collagen triple helix, is the most widely used functional biopolymer and a prototype for studies of physical gels. Gelatin gels have also served as models for soft biological tissue in efforts to elucidate the molecular basis of the magnetic relaxation phenomena that govern magnetic resonance image contrast. Yet, the microstructure, hydration, and magnetic relaxation beha

PURPOSE: The purpose of this study was to report an initial experience with the endovascular repair of descending thoracic aortic aneurysm. Complications and intermediate-term morphologic changes were identified with the intent of altering patient selection and device design. METHODS: Endografts were placed into 25 patients at high-risk for conventional surgical repair over a 3(1/2)-year period. D

Abstract in Danish Benign paroksysmal positionel vertigo viser sig ved kraftige rotatoriske svimmelhedsanfald, når patienten bevæger sit hoved i bestemte stillinger. Tilstanden er, som navnet udsiger, benign, men medfører oftest væsentlig morbiditet. Fritflydende otolitter (ørekrystaller) antages at sedimentere i buegangene ved hovedbevægelser. Herved påvirkes cupula hydrodynamisk og dette medføreBenign paroxysmal positional vertigo presents with brief, episodic, positioning-provoked vertigo and characteristic findings on Dix-Hallpike and other positional tests. This article is based on a systematic review of the literature and describes epidemiology, etiology, pathogenesis, diagnostic positional tests and treatment using canalith repositioning, liberatory and 360 degrees rotation manoeuvr

This paper describes a low-distortion wide-band CMOS direct digital RF amplitude modulator, which uses a 10-bit linear interpolation current-steering digital-to-analog converter (DAC) and a Gilbert-cell-based mixer to generate an amplitude modulated RF signal directly. The linear interpolation increases the attenuation of the DAC's image components. The reconstruction filter is, therefore, elimina

After time-consuming and costly investigations, patients with neck metastases from an occult primary often receive unnecessarily large radiation volumes to treat a possible origin in the nasopharynx. In this study a colorimetric antisense Epstein-Barr early ribonucleoprotein 1 (EBER1) oligonucleotide probe specific for Epstein-Barr virus RNA was hybridized in situ to metastatic tissue obtained fro

The physical workload after the introduction of new technology, i.e. mechanical versus manual deboning of poultry was studied with respect to force requirements, work postures and repetitive movements of the hand. Thirteen healthy women were studied during manual and mechanical deboning using electromyography (EMG), force recordings, observer based force ratings and electrogoniometers. The muscula