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  • 1
    Electronic Resource
    Electronic Resource
    Root resorption in dental trauma: 45 cases followed for 5 years (2003)
    Oxford, UK : Munksgaard International Publishers
    Dental traumatology 19 (2003), S. 0 
    Details
    ISSN: 1600-0595
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract –  We aimed to: (i) study the prevalence of root resorption after luxation or avulsion injuries on permanent teeth referred to our dental clinic over a 3-year period; (ii) study the relationship between type of injury and resultant type of resorption complication; and (iii) evaluate success of treatment protocols for various resorption complications. We observed 1943 patients with dental trauma, aged between 2 and 26 years, referred to the Accident and Emergency Department of the Dental Clinic, University of Brescia, from 1st September 1997 to 31st December 2001. Of these, 261 permanent teeth had sustained luxation (n = 188) or avulsion (n = 73) injuries. Permanent teeth luxation and avulsion injuries occurred most often in upper incisors (75%) of patients mostly aged 12–21 years, with males more commonly affected than females (68.3% vs. 31.7%). These cases were followed for 5 years, and complications and response to treatment were recorded. Root resorption was observed in 45 (17.24%) of these cases. Of the 45 cases with resorption, 9 were associated with luxation injury (20%) while 36 (80%) with avulsion. We distinguished 30 cases of inflammatory root resorption (18 transient and 12 progressive) and 15 cases of ankylosis and osseous replacement. When resorption was recognized, quick and effective treatment could still result in an excellent functional and aesthetic outcome for these teeth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-9657.2003.00205.x
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  • 2
    Electronic Resource
    Electronic Resource
    Efficacy and safety of continuous intravenous infusion of remifentanil in preterm infants undergoing laser therapy in retinopathy of prematurity: clinical experience (2003)
    Oxford, UK : Blackwell Science Ltd
    Pediatric anesthesia 13 (2003), S. 0 
    Details
    ISSN: 1460-9592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: Preterm infants often require surgery. As experimental evidence suggests that premature infants may experience pain and this could even result in fatal complications, the anaesthesiologist must face problems related to lowbirth weight, high risk of hypothermia, concomitant pulmonary disease and metabolic and receptor immaturity. Recently remifentanil has been considered an optimal analgesic drug in a preterm infant undergoing mechanical ventilation and frequent surgical manoeuvres, but no clinical studies have been reported in the literature. The aim of our study was to evaluate the efficacy of a continuous intravenous infusion of remifentanil in premature infants undergoing laser therapy for retinopathy of prematurity (ROP).Methods: Six premature infants with ROP were scheduled for laser therapy. The procedure was performed in the neonatal intensive care unit. Transcutaneous carbon dioxide, pulse oximetry, respiratory rate, ECG and noninvasive blood pressure were continuously monitored. Infusion of remifentanil started with a dose of 0.75–1 μg·kg−1·min−1, 1 h before surgery. A midazolam bolus dose (0.20 mg·kg−1) was administered and the remifentanil infusion was increased to 3–5 μg·kg−1·min−1 taking into account haemodynamic and respiratory changes or spontaneous movements.Results: Increased dosage was necessary only for 10 min during the procedure. No changes in temperature and ventilatory settings were observed and after 2 h from the surgical procedure the preterm infants were back to their preoperative status.Conclusions: A continuous infusion of remifentanil allowed optimal control of surgical stress and a return to preoperative status and ventilatory settings without side-effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9592.2003.01101.x
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of low-dose alfentanil administration on central respiratory drive and respiratory pattern in spontaneously breathing ASA 1 patients (2002)
    Oxford, UK : Blackwell Science Ltd
    Anaesthesia 57 (2002), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary The aim of this study was to assess the short-term effects of the administration of low doses of alfentanil on respiratory drive and respiratory pattern. We studied 17 ASA I patients scheduled for minor surgery or endoscopic procedures. During spontaneous ventilation, Respiratory Rate, Tidal Volume, Total Respiratory Cycle, Inspiratory and Expiratory Time, Mean Inspiratory Flow, P0.1, Sao2 and Etco2 were all measured. The inspired oxygen concentration was 21% and measurements were made at baseline, 5 min (T1), 10 min (T2) and 15 min (T3) following an intravenous bolus injection 10 µg.kg−1 alfentanil. The administration of alfentanil produced a significant (p 〈 0.05) reduction in Sao2, minute volume and P0.1. In ASA I spontaneously breathing patients, the pre-operative administration of low doses of alfentanil can initially reduce the respiratory centre activity leading to a reduction in minute volume and Sao2. We therefore recommend careful monitoring of cardio-respiratory function in ASA I patients, following the administration of alfentanil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2044.2002.02573.x
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  • 4
    Electronic Resource
    Electronic Resource
    Quantitative ultrasound at the hand phalanges: comparison with quantitative computed tomography of the lumbar spine in postmenopausal women (2000)
    Springer
    European radiology 10 (2000), S. 826-831 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Bone mineral density ; Speed of sound ; Quantitative ultrasound ; Osteoporosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The aim of our study was to evaluate the diagnostic effectiveness of a quantitative ultrasound technique for measuring bone tissue at the proximal phalanges of the non-dominant hand. We correlated the mean value of the amplitude-dependent speed of sound (AD-SoS) and the ultrasound bone profile score (UBPS) measured at the phalanges with bone mineral density (BMD) of the lumbar spine gauged with quantitative computed tomography (QCT). We studied a group of 177 postmenopausal women consecutively presenting for osteoporosis screening. We observed that in the whole study group both AD-SoS and UBPS correlated weakly with BMD, although with statistical significance (r = 0.54 and r = 0.45, respectively; p 〈 0.0001). The same parameters showed a poor correlation (r = 0.48, p 〈 0.0001; and r = 0.23, p = 0.017) in the group of patients which QCT has classified as osteoporotic. Finally, no correlation was found in the rest of our population. The correlation coefficients of comparison between our QUS and QCT measurements are not strong enough to allow us a prediction of one measure from the other. Therefore, we do not consider the phalangeal osteosonography a valid substitute of QCT technique for assessment of bone status in postmenopausal women.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300051013
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  • 5
    Electronic Resource
    Electronic Resource
    Compatibility Range in Polymer Mixtures. An approach using analogue calorimetry and group contribution procedures (2000)
    Springer
    Journal of thermal analysis and calorimetry 62 (2000), S. 135-151 
    Details
    ISSN: 1572-8943
    Keywords: analogue calorimetry ; binary and ternary mixtures ; excess enthalpies ; group contributions ; model compounds ; polymer blends
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The mixing enthalpies of blends of polymethylmethacrylate (PMMA) with poly(styrene-co-acrylonitrile) (SAN) were investigated by analogue calorimetry through the determination of the excess enthalpies of pseudobinary model mixtures corresponding to the addition of methyl-i-butyrate to a binary mixture of acetonitrile or propionitrile plus toluene or ethylbenzene. A group contribution procedure, based on UNIQUAC equation, was also devised and the polymeric mixing enthalpies were calculated from properly defined group contributions. Enthalpies for polymeric interactions were introduced into the Flory-Huggins equation and the miscibility window of PMMA-SAN mixtures was calculated. The results show a qualitative agreement with the experimental miscibility data and indicate that both the analogue calorimetry and the group contribution procedures yield correct results when acetonitrile, and not propionitrile, is chosen as the model for the polyacrylonitrile repeat unit of the copolymer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010118929599
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  • 6
    Electronic Resource
    Electronic Resource
    Excess Molar Enthalpies of the Ternary Systems (Acetonitrile+methyl Isobutyrate+Toluene) and (Propionitrile+methyl Isobutyrate+ethylbenzene) at 298.15 K (2000)
    Springer
    Journal of thermal analysis and calorimetry 61 (2000), S. 377-388 
    Details
    ISSN: 1572-8943
    Keywords: analogue calorimetry ; excess enthalpies ; mixtures ; model compounds ; polymer blends
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Excess molar enthalpies were measured at 298.15 K with a flow calorimeter built in our laboratory for the two ternary systems (acetonitrile+methyl isobutyrate+toluene) and (propionitrile+methylisobutyrate+ethylbenzene). Experimental data were nicely predicted by some empirical andsemi empirical procedures, exception made for UNIFAC group contribution method. The latter equation proved unsatisfactory for all mixtures containing methyl isobutyrate. The first ternary set proved a good model system to simulate mixing enthalpies reported in the literature for mixtures of poly(styrene-co-acrylonitrile) with polymethylmethacrylate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010105131141
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  • 7
    Electronic Resource
    Electronic Resource
    Excess Molar Enthalpies and Excess Molar Volumes of (Water+Octan-1-ol or +Octan-2-ol) at 298.15 K (2000)
    Springer
    Journal of thermal analysis and calorimetry 61 (2000), S. 637-647 
    Details
    ISSN: 1572-8943
    Keywords: binary mixtures ; excess enthalpies ; excess volumes ; octan-1-ol ; octan-2-ol ; water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The excess molar enthalpies and volumes have been determined for the binary system (water+octan-1-ol or +octan-2-ol) by means of direct calorimetric and densimetric measurements in the miscibility range. The experimental data were described through a Redlich-Kister type equation. For excess enthalpies a sigmoidal shape is predicted,while excess volumes are negative except for a little positive queue observed for(water+octan-1-ol) system at very low water content. Also the partial molar enthalpies of solution and the partial molar volumes of water in the two isomeric octanols at infinite dilution have been evaluated and discussed. A comparison is made between excess enthalpies and excess free energies calculated by the UNIFAC method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010154409276
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