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  • 1
    ISSN: 1600-0595
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract  – Traumatized anterior teeth need quick esthetic and functional repair. Esthetic requirements of anterior teeth require the use of composite materials which, in the most complex cases, can be used in association with fibers so as to improve their mechanical resistance. Many kinds of fibers are available. The authors considered parameters such as physical properties, water absorption, ease of cutting and of laying. Polyethylene fibers appear to have the best properties in elasticity, translucency, adaptability, tenaciousness, resistance to traction and to impact. Fifteen children, between 7 and 13 years old, with crown fractures of the anterior sector were treated. In the case of a simple crown fracture, the missing part was restored by polyethylene fibers and composite resins. In the case of a complex crown fracture needing endodontic treatment, the fibers were used as a central core stump in order to restore the dental morphology. At control examinations, the teeth restored by this technique were acceptable, both in function and in aesthetics. Thus, the authors recommend this combined technique for predictable restoration of traumatized anterior teeth.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Copenhagen : Munksgaard International Publishers
    Clinical oral implants research 10 (1999), S. 0 
    ISSN: 1600-0501
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In order to ensure an adequate space where new bone can be formed in guided bone regeneration (GBR), most surgeons fill bone defects with biomaterials. In this work we evaluated new bone regeneration in 10 patients using only a blood clot protected with titanium grids and non-resorbable membranes, without any filling material. A manual measurement of the size of the bone defect, using a plastic probe, was performed at 2 surgical steps. After 5 months of treatment, a biopsy was taken from each patient, fixed and embedded in PMMA, examined microradiographically and morphologically to evaluate the newly-formed bone. Our results showed a good repair of the defects by bone regeneration (about 85% overall), high mineral density of new bone around the implants after 5 months, and steady state deposition processes. These results in GBR, without filling material, apear very promising for implantology and reconstructive odontostomatology practice.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2307
    Keywords: Proliferating cell nuclear antigen ; Prostate cancer ; Prostatic microcarcinoma ; Prognosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Monoclonal antibody to proliferating cell nuclear antigen (PCNA) has been used to identify the growth fraction in ten cases of benign prostatic hyperplasia (BPH), in 20 prostatic microcarcinomas (PMC) and in 30 cases of infiltrating prostatic carcinoma (PC). Ten year follow-up was available on all cases by means of clinical, serological, radiological and echographic examinations. The percentage of PCNA-staining nuclei was independently counted by two observers. Statistical analysis showed significant differences between PCNA/ cyclin score of BPH and PMC without recurrences with respect to those of PMC with progression and of PC. PCNA immunostaining may represent a reliable method for assessing cellular proliferative activity. It may be used as a more powerful diagnostic hallmark of PMC than patterns of non-malignant microglandular proliferation and is also a useful additional test for assigning histological grades to PMC and PC. Statistical analysis indicated that PCNA/cyclin index was an independent significant prognostic indicator of predicting malignant progression (P〈0.01) and survival rates (P〈0.05) of PC and PMC (〉5 mm diameter).
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 424 (1994), S. 165-168 
    ISSN: 1432-2307
    Keywords: Normal human prostate ; Endocrine cells ; Morphometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A morphometric analysis was performed to obtain quantitative data on age-related changes in prostatic endocrine cell (PrEC) density. Sixty prostates from subjects aged 14–74 years were studied with a semi-automatic image analysis system (ASM 68K, Leitz) applied to sections immunostained for chromogranin A-reactive cells. The highest density of PrECs (0.366 cells/mm of epithelial length) was found in the 25–54 year age group, which was significantly different from that found in prostates of the younger (0.311 cells/mm) and the older (0.261 cells/mm) age groups. The data probably reflect the higher incidence of incompletely developed glandular units in the younger group and the formation of new alveoli related to the usual glandular hyperplasia that occurs with increasing age in the older group.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Neurological sciences 10 (1989), S. 301-305 
    ISSN: 1590-3478
    Keywords: AIDS encephalopathy ; multinucleated giant cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Gli AA. riportano gli aspetti neuropatologici di 5 casi autoptici in pazienti con AIDS la cui causa di morte era riferibile ad infezioni opportunistiche associate o meno a sarcoma di Kaposi cutaneo e/o viscerale. In tutti i casi era visibile un marcato edema cerebrale, demielinizzazione e spongiosi della sostanza bianca cerebrale, mentre gli aspetti caretteristici erano costituiti dalla presenza di cellule giganti multinucleate (CGM) poste in prossimità o all'interno dei noduli microgliali. Lo studio immunoistochimico ha dimostrato una netta positività cellulare per l'RCA I e per la Ferritina, mentre i markers per astrociti, neuroni, macrofagi, istiociti, linfociti e cellule endoteliali erano negativi. Questi risultati suffragano l'ipotesi che le CGM possono derivare da cellule microgliali.
    Notes: Abstract We report the neuropathological findings of 5 post-mortem cases of AIDS. The most common causes of the death were multiple opportunistic infections associated with cutaneous and/or visceral Kaposi sarcoma in two cases. Cerebral edema, demyelination and spongiosis of the white matter were present but th most remarkable finding was the presence of multinucleated giant cell (MGC) within and nearby microglial nodules. On immunohistochemical investigation MGC and microglial cells exhibit positive stain only for RCA I and Ferritin, while immunohistochemical markers for astrocytes, neurons, macrophages, histiocytes, lymphocytes and endothelial cells were negative. No microrganism, nor viral inclusions were detected. These results support the hypothesis that MGC may be derived from microglial cells.
    Type of Medium: Electronic Resource
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