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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 45 (1973), S. 2239-2247 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 37 (1982), S. 0 
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The induction doses of thiopentone in eight elderly male patients (60–80 years) were significantly lower (p 〈 0.01) than in eight young male patients (ranges 3.09–5.06 mg/kg body weight in the elderly and 4.88–8.11 mg/kg in the young). The sleep concentrations in venous as well as in arterial blood did not differ between the two groups. In the elderly the arterial concentrations were significantly higher than the venous (p 〈 0.05). A three compartment open model was used to describe the disappearance of the drug from the venous blood. Significant increases were found in V3(means 145.9 and 51.2 litres) and in T½β(means 781 and427 minutes) in the elderly. The redistribution rate constant, K1,2, was decreased in the elderly (p 〈 0.05). By impedance cardiography 5 minutes after sleep mean percentages of the pre-induction value of cardiac output were 94.6% in the young and 87.0% in the elderly (p 〈 0.05). In the young a correlation was found between cardiac output and induction dose, (r =0.85, p 〈 0.01).
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Munksgaard International Publishers
    Journal of clinical periodontology 30 (2003), S. 0 
    ISSN: 1600-051X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Copenhagen : Munksgaard International Publishers
    Clinical oral implants research 4 (1993), S. 0 
    ISSN: 1600-0501
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Radiofrequent magnetron sputtering was used to produce calcium phosphate coatings on metal and plastic substrates. Scanning electron microscopy showed that the deposited films had a uniform thickness and a dense columnar structure. Energy-dispersive X-ray analysis, X-ray crystal diffraction and atomic absorption spectrometry demonstrated that the sputtered layer was well-crystallized calcium phosphate ceramic with a Ca/P ratio varying between 1.9 and 2.5. The biocompatibility of the coatings was determined by in vitro and in vivo experiments. It was found that the coatings were biocompatible without any sign of adverse tissue reaction. It was concluded that magnetron sputtering is a promising method for forming a biocompatible ceramic coating onto an implant material. Nevertheless, several problems have to be solved before magnetron sputtering can be used on a routine basis for the production of Ca/P coatings.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 54 (1998), S. 355-357 
    ISSN: 1432-1041
    Keywords: Key words Tiagabine ; Digoxin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: To assess the possibility of any clinically relevant pharmacokinetic interactions between tiagabine, a novel antiepileptic drug, and digoxin. Methods: Potential pharmacokinetic interactions between tiagabine and digoxin were investigated in an open-label, two-period cross-over study in healthy male volunteers. Thirteen volunteers, aged between 18 and 43 years, were randomised to receive digoxin (0.5 mg twice a day for 1 day, then 0.25 mg once a day for 8 days) either alone or co-administered with tiagabine (4 mg three times daily for 9 days). Following a 7-day wash-out period, volunteers crossed over to the other dosing regimen. Peak serum concentration, time to maximum serum concentration, area under the serum concentration–time curve from zero to 24 h and steady state serum concentration were calculated for digoxin and compared between treatment groups. Results: No statistically significant differences between treatment groups were observed for any of the derived digoxin pharmacokinetic parameters. The most common adverse events reported during digoxin alone and in combination with tiagabine were somnolence and headache; an overall greater frequency of adverse events was reported during combined treatment. Adverse events were generally mild in nature; no serious adverse events were reported. Conclusions: At the doses administered, there is no evidence of a pharmacokinetic interaction between digoxin and tiagabine in healthy male volunteers.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Recently it has been supposed that the soft tissue response to fibre mesh materials can be influenced by changing the flexibility and/or porosity of these materials. Therefore, to test this hypothesis, small sintered stainless steel (316L) fibre web implants with varying flexibilities and porosities were inserted subcutaneously into the dorsum of rabbits. The implants were left in situ for 15 weeks. Histological and tissue compatibility evaluations were performed. It was found that the best tissue reaction developed around the most porous fibre web material. Nevertheless, because of the possible occurrence of corrosion phenomena, the real existence of a relationship between implant porosity and connective tissue behaviour is still not clear.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract A calciumphosphate cement, consisting mainly of tricalciumphosphate (85% α-TCP and 15% β-TCP), was inserted in 16 surgical defects created in the tibia of goats. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) showed that after 3 months of implantation the α-TCP was transformed to hydroxyapatite (HA). Histological evaluation revealed that the presence of cement stimulated the ingrowth of bone compared with unfilled cavities. Active resorption and remodelling of cement particles was observed. The cement did not evoke an inflammatory reaction. At 6 months after implantation no further changes in the composition of the cement occurred. All remaining material was surrounded by mature bone.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: The bone response to different calcium phosphate (Ca-P) coated implants was evaluated in a goat animal model. Two types of plasma spray coatings were applied to a commercially pure titanium (cpTi) tapered, conical screw-design implant (BioComp®); hydroxyapatite (HA-PS) and a dual coating, consisting of FA and HA (FA/HA-PS). In addition an amorphous RF magnetron sputter coating (Ca-P-a) and uncoated implants were investigated. Forty-eight implants were inserted in the maxilla of 12 adult female goats. After implantation periods of 3 and 6 months, the bone implant interface was evaluated histologically and histomorphometrically. After both implantation periods all plasma spray coated implants were maintained. On the other hand three Ca-P-a and two cpTi implants were lost. Histological examination revealed a better bone response to both plasma spray coated implants. Histomorphometrical evaluation confirmed this finding. At 3 and 6 months significantly higher percentages of bone contact (p〈0.001, ANOVA) were measured for both plasma spray coated implants than for the cpTi and Ca-P-a implants, while no significant difference (p〈0.05) existed between both implantation periods. Degradation of both plasma spray coatings was observed. Supported by the results, it is concluded that, although Ca-P coatings can improve the performance of dental implants, the presence of a Ca-P coating is not the only important factor for bone healing around implants placed in low density trabecular bone.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Four different implant materials were installed into the mandibular corner of goats to investigate the trabecular bone response in a mainly unloaded model. The implants were installed using a standardized technique and were left in situ for 12 weeks. One goat had to be sacrificed after surgery because of a broken rib; the other animals healed uneventfully. After sacrifice of the animals, the bone response to the uncoated and the three different Ca–P implants was evaluated histologically and histomorphometrically. Four sections of each implant were evaluated; two were located in the cortical and two in the trabecular bone. Of the 44 retrieved implants, 20 implants appeared to be installed partially in the mandibular canal, as clearly visible on the X-rays. These implants were not used in the histomorphometrical measurements. Histological evaluation showed that the trabecular and cortical bone reactions were similar; there was no significant difference in the percentage of bone contact nor in the amount of bone in contact with the implants. In conclusion this study showed that the mandibular corner is an unsatisfactory model for the installation of implants because of anatomical restrictions. Also, the experiment remained inconclusive about the influence of loading conditions on bone behaviour. Nevertheless, the histological results confirmed the bioactive properties of Ca–P coatings.
    Type of Medium: Electronic Resource
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