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V Cattaneo

Publications and source records attributed to V Cattaneo.

At least 19 recordsLinked to original sources
PubMed2003

Ten-year follow-up in a maxillary sinus augmentation using anorganic bovine bone (Bio-Oss). A case report with histomorphometric evaluation.

Several bone grafting materials have been used in sinus augmentation procedures. Bio-Oss (deproteinized and sterilized bovine bone) has shown to have osteoconductive properties and no inflammatory or adverse responses have been published. In spite of these successful results, histologic data regarding bone augmentation using Bio-Oss in humans is scarce. The purpose of this study was to analyse the amount of Bio-Oss ossification in a case of maxillary sinus augmentation, recording and comparing histomorphometric data 8 months, 2 and 10 years after surgery. This long-term histologic evaluation of retrieved specimens has been performed, comparing histomorfometric measures at different times. Eight months after surgery we observed in 20 different thin sections of the specimen a mean amount of bone tissue (including medullar spaces) of 29.8% (and 70.2% of Bio-Oss) +/- 2.6. At 2 years the bone tissue increased to 69.7% + 2.7 and 10 years after surgery it was 86.7% +/- 2.8. The comparison of the means for each time has shown a highly significant increasing trend in bone formation associated with Bio-oss resorption: at 8 months, 2 and 10 years.

Alveolar Ridge Augmentation↗
PubMed2003

Effect of enamel matrix derivative on human periodontal fibroblasts: proliferation, morphology and root surface colonization. An in vitro study.

BACKGROUND: Several clinical trials have shown the effectiveness of Emdogain(R) (EMD) in promoting tissue regeneration, even though the underlining biological mechanism is still poorly known. OBJECTIVES: The aim of the present study was to verify the effect of EMD on the proliferation of human periodontal ligament (PDL) fibroblasts and on their colonization and differentiation following contact with the root surface of extracted teeth in vitro. METHODS AND RESULTS: Fibroblasts from PDL were seeded on Petri dishes and cell growth was evaluated by cell counting in the presence and absence of EMD, after 1, 3 and 8 d of culture. A significant effect of EMD upon cellular proliferation at d 3 and 8 was detected. When PDL cells were grown for 12 d with EMD on etched human root surface, a change in cell morphology was observed. Scanning electron microscopy revealed that cells grown on root EMD-treated surface present a body with a flattened surface closely adherent to the substrate and an outer smooth surface rounded in shape. From the flattened surface some thin and elongated cellular processes connecting with the substrate were also observable. PDL cells grown on EMD-treated surface showed lack of alkaline phosphatase activity, as some authors noticed in cementoblasts in vitro. CONCLUSIONS: In conclusion, our data indicate that EMD enhances human PDL fibroblast proliferation. Furthermore, the cells in the presence of EMD show morphological changes that make them more similar to cementoblasts than to fibroblasts, suggesting a process of cellular differentiation that could play an important role in periodontal tissue repair.

Adult↗
PubMed2000

Comparison of treatments of infrabony defects with enamel matrix derivative, guided tissue regeneration with a nonresorbable membrane and Widman modified flap. A pilot study.

BACKGROUND, AIMS: The purpose of the present study was to compare the efficacy of 3 different surgical procedures in the treatment of infrabony defects: guided tissue regeneration (GTR) with non-resorbable membranes, Widman modified flap (WMF) and enamel matrix derivative (EMD). METHOD: 30 patients with an infrabony component > or = 4 mm were selected. 10 were treated with expanded polytetrafluorethylene (ePTFE (Gore - Tex W. L. Gore and Associates, Flagstaff, AZ, USA)) membranes, 10 with WMF and 10 with enamel matrix derivatives (Emdogain (U Biora AB Malm, Sweden)). The efficacy of each treatment modality was investigated through regression analysis. Probing attachment level (PAL) gain, probing depth (PD) reduction and gingival recession (REC) variation were analyzed. RESULTS: Both Emdogain (enamel matrix derivative) and ePTFE treatment show significant better results as compared to the WMF procedure in which there were no significant changes in PAL gain and PD reduction at baseline and 1 year after surgery. CONCLUSIONS: Results from our analysis suggest that there is no statistically significant difference in PAL gain between GTR and EMD. The clinical outcomes of this pilot study may be of little significance, considering the small number of patients, but it has provided an important base for a controlled clinical trial (with a larger number of patients) which is currently in progress.

Alveolar Bone Loss↗
PubMed2000

Volatile components of cigarette smoke: effect of acrolein and acetaldehyde on human gingival fibroblasts in vitro.

BACKGROUND: Tobacco and some of its volatile and non-volatile components have been found to affect many types of cells including gingival fibroblasts. Since normal gingival fibroblast functioning is fundamental to the maintenance of the periodontal connective tissue, as well as to wound healing, we examined the effect of acrolein and acetaldehyde, volatile components of cigarette smoke, on proliferation, attachment, and ultrastructure of human gingival fibroblasts (HGFs) in culture. METHODS: Human gingival fibroblast (HGF) strains derived from healthy individuals with non-inflamed gingiva were used in this study. The cells were incubated in the presence of different concentrations of acrolein and acetaldehyde. Cell attachment and proliferation were evaluated after incubation for 3 hours and 5 days, respectively. In addition, the cells were examined with a transmission electron microscope in order to evaluate their morphology. RESULTS: The results show that acrolein and acetaldehyde produced dose-dependent inhibition of HGF attachment and proliferation. The cytotoxic effect was, however, reversible when both substances were removed, after 3 days, from the medium. The main ultrastructural finding for the HGF cytoplasm was the presence of vacuoles and lysosomal structures that became prominent with increasing concentration of acrolein and acetaldehyde. CONCLUSIONS: Our experimental data suggest that acrolein and acetaldehyde, volatile components of tobacco smoke, are detrimental to HGF survival and consequently to the oral connective tissue. According to our morpho-functional evidence, these findings corroborate clinical and epidemiological investigations demonstrating smoke as a risk factor in the development of periodontal disease.

Acetaldehyde↗
PubMed1995

Nerve growth factor receptor and neurochemical markers in human oral mucosa: an immunohistochemical study.

BACKGROUND: The innervation of the oral mucosa has so far been studied mainly by histochemical and ultrastructural techniques. Only few studies have investigated the presence of neural proteins and neurotransmitters in human gingival mucosa. OBJECTIVE: The purpose of the present study was to evaluate the presence and distribution of neural structural and transmitter proteins in different areas of normal human oral mucosa. METHOD: Indirect immunofluorescence was employed on specimens taken from different mucosal regions (gingiva, lips, gums, palate). Both structural (low-affinity nerve growth factor receptor, NGFr; protein gene product 9.5, PGP 9.5) and neuropeptide markers (substance P; calcitonin gene-related peptide; vasoactive intestinal peptide, neuropeptide Y) were used. RESULTS: NGFr and PGP 9.5 intensely labelled both nerve fibres and selected epithelial cells, while neuropeptide immunoreactivity was scarcely expressed and exclusively localized in nerve fibres. CONCLUSIONS: Similarly in the distribution pattern and neurochemistry between oral and cutaneous innervation is apparent. Expression of NGFr could be relevant to the trophism of both the oral innervation and epithelium.

Adolescent↗
PubMed1994

[Taste changes in patients with AL amyloidosis. Preliminary studies].

Taste acuity in 20 subjects affected by AL amyloidosis without oral complications was investigated by threshold determination. Sixteen cases did not recognize one or more fundamental tastes. Sour was the most frequently lost taste, as it was not recognized by 10 out of 20 cases. So, sensorial neuropathy, altering taste generation and/or transmission, seems frequently associated to AL amyloidosis. Further researches will show if taste losses realize typical symptomatic features in this disease.

Adult↗
PubMed1994

[A critical note on bioceramics].

In this note I, the authors point out the uncertainty and confusion which exists in the bioceramics field. They then list the calcium phosphate biomaterials today in use.

Biocompatible Materials↗
PubMed1991

[Guided tissue regeneration: an ultrastructural observation by transmission electron microscopy and scanning electron microscopy].

PTFE membranes are used for guided tissue regeneration in order to treat angular bone defects or forcation involvements in surgical treatment. Ultrastructural investigations have been performed by means of electron transmission and scanning microscopy. In agreement with previous reports, fibroblast cells adhering to the reticular structure of PTFE membrane were observed; these were interposed among coagulated clusters of fibrinous material and blood cells round shaped. Elongated bacterial cells were always present in the microscope fields analysed. These observations were confirmed by means of transmission microscopy; moreover specific techniques enabled us to demonstrate that fibroblast cells were synthetizing collagen, which was present in the form of extracellular fibers mixed to fibrin clusters. Roundish and elongate bacterial cells were always observed both in the extracellular matrix and into macrophages.

Guided Tissue Regeneration, Periodontal↗
PubMed1989

[Diagnostic problems in a case of pyostomatitis vegetans].

After a clinical and histo-pathological introduction, the paper presents a case of Piostomatitis Vegetans, a rare stomatitis coexisting with chronic inflammatory disease of the intestinal tract, that was treated with local corticosteroids.

Adult↗