PubMed Health⌕ Search

Biomedical subjects

A Polimeni

Publications and source records attributed to A Polimeni.

At least 19 recordsLinked to original sources
PubMed2006

Black stains in the mixed dentition: a PCR microbiological study of the etiopathogenic bacteria.

The aim of this work is to emphasize that particular stains on the third cervical of the buccal and lingual surfaces in mixed dentition, called "black stain." Previous research showed the microbiological etiology of this discoloration by chromogen bacterias. Our study shows bacteria spp involved in stains by means of PCR process and electrophoresis gel on the agarose medium. Sample was formed by 100 subject with black stain and 100 control subjects stain-free. A statistical analysis (SPSS 10.0) using X2 was performed in this study. Porphyromonas gingivalis and Prevotella melaninogenica, were not involved in both in black stain subjects and in the control. On the contrary, Actinomyces could be involved in the pigmentation process.

Actinomyces↗
PubMed2006

Malignant infantile osteopetrosis: dental effects in paediatric patients. Case reports.

AIM: Malignant Infantile Osteopetrosis is a hereditary pathology caused due to osteoclastic cells which are incapable of carrying out their functions and hence do not resorb osseous tissue where required. Thus the consequence is that during growth phase, the medullary cavities and nervous tissue cavities do not undergo sufficient growth and the corresponding organs do not develop adequately. The aim of this study is to outline the role of the pediatric dentist who has to carry out protocols of primary, secondary, tertiary prevention intervening at many levels. Clinical features and dental effects are described. Two case reports are presented in this study. CONCLUSION: Oral problems of osteopetrosis are delayed tooth eruption, absence of some teeth, malformed teeth, enamel hypoplasia, disturbed dentinogenesis, hypomineralisation of enamel and dentin, propensity for tooth decay, defects of the periodontal membrane, thickened lamina dura, mandibular protrusion, and the presence of odontomas. Tooth removal should be limited as it may induce bone fractures and osteomyelitis. The role of the pediatric dentist is defined.

Bone Marrow Transplantation↗
PubMed2006

Cementoenamel junction of deciduous teeth: SEM-morphology.

AIM: The aim of this study was to investigate the cementoenamel junction of a group of 11 primary sound mandibular incisors extracted for orthodontic reasons. MATERIALS AND METHODS: Eleven caries and defect-free human inferior deciduous incisors were extracted for orthodontic reasons and the cementoenamel junction was investigated by scanning electron microscopy (SEM). The types of tissue interrelations were classified in four possible categories: 1) cementum and enamel edge-to-edge, 2) cementum overlapped by enamel, 3) enamel overlapped by cementum, 4) presence of exposed dentin between enamel and cementum. RESULTS: In our observations root cementum and enamel edge-to-edge interrelation was the most frequent feature observed in overall sample, root cementum overlapping enamel tissues was observed in more than one third of the cementoenamel junction area, exposed dentin was a rare observation. In few, small and rare areas enamel overlapped cementum. Further studies could determine statistical prevalence. CONCLUSION: The cementoenamel junction of primary teeth differs from that of permanent teeth, the scarcity of gaps between cementum and enamel, the epithelial junction at the equator of the crown and the globosity of the crown are probable protective factors toward decay susceptibility.

Child↗
PubMed2006

Glycogen Storage Disease type Ib: a paediatric case report.

AIM: This paper addresses the need of the dental literature to document cases of Glycogen Storage Disease (GSD) type Ib with focus on the paediatric management of oral and dental problems and the potential complications arising from the increased susceptibility to bacterial infections, cariogenicity, and blood diathesis. METHODS: Previous medical and dental papers on GSD type Ib published from 1980 to 2006 have been searched in the electronic databases PubMed and EMBASE using keywords of the NLM's Thesaurus, with the aim to retrieve important implications of treatment and preventive measures for an evidence-based multidisciplinary medical and dental management of the oral health problems of a 9-year old boy affected by GSD type Ib. CASE REPORT: Oral and dental manifestations observed during a period of two years and relative treatments are reported from our case. Data on pharmacologic, oral hygienic, dietary, and surgical preventive measures for the control of recurrent oral infections, dental caries, gingival inflammation and risk of surgical bleeding are described. In addition, an electronic microscope structural analysis at SEM of the enamel tooth surface was conducted to identify any characteristic difference in the enamel architecture of this GSD type Ib affected patient compared with the normal enamel structure. CONCLUSION: The oral manifestations of our case included uncommon findings such as multiple deep oral ulcers of the tongue, labial and vestibular mucosa, which could be related with a severe impairment of the neutrophil-related immune system of the patient. At SEM, the enamel of the deciduous teeth showed dark spots of hypomineralisation which are the first published data of an enamel-related susceptibility to dental caries. The quality of life of our patient increased thanks to the oral and dental treatments and preventive oral health measures given at clinical appointments. The dentist should be prepared to face the possible complications of surgery in these patients and the hospital setting seems to allow for this clinical safety.

Child↗
PubMed2005

Psoriasis of the dorsal surface of the tongue.

Psoriasis is primarily an inherited inflammatory skin disease, it is characterized by erythemato-squamous lesions that usually involve elbows, knees and the scalp. Oral manifestations are rare in psoriasis, infact, oral psoriasis involves 2% of psoriatic patients and usually it is observed with the onset of cutaneous lesions and progresses with them. Differential diagnosis should be done for Reiter's syndrome, leukoplakia and geographic tongue. The authors describe a case of tongue psoriasis without cutaneous lesions.

Adult↗
PubMed2003

Oral manifestations in a group of young patients with anorexia nervosa.

Anorexia nervosa (AN) is an eating disorder (ED) identified using DSM-IV criteria. Eating disorders are occurring increasingly earlier in childhood and can lead to a series of oral manifestations. The aim of this study was to evaluate the correlation between stomatognathic lesions and eating disorders in 80 young patients (76 females and 4 males aged 9-18 years) with restricting or binge-eating/purging AN. The results confirm the close correlation between ED and oral lesions, the most common of which were dental erosion, dentinal hypersensitivity, the extrusion of amalgam restorations and xerostomia. The authors conclude by emphasising the importance of involving dentists in the diagnosis and treatment of ED.

Adolescent↗
PubMed2003

Case report: clinical management of hypoplastic amelogenesis imperfecta.

BACKGROUND: The fundamental therapeutic problems related to amelogenesis imperfecta treatment are governed by the need to effect primary prevention interventions, reducing the risk of calculus accumulation and caries. There are also aesthetic and functional rehabilitative needs. Clinical management rehabilitation techniques vary depending on the AI type, but usually require restoration of affected teeth. Where orthodontic problems also exist, these should be corrected prior to the final restorative treatment. CASE REPORT: The use of composite resins in aesthetic restoration of permanent anterior and posterior teeth as affected by hypoplastic AI type is described. This case illustrates a patient who suffered from less attrition than those of the hypomineralized varieties. The therapeutic choice has allowed the correction of vertical dimension without the use of preformed crowns.

Amelogenesis Imperfecta↗
PubMed2002

Structure and passivation effects of mono- and dihydrogen complexes in GaAsyN(1-y) alloys.

In GaAsyN(1-y), the presence of a few percent of N induces a large reduction of the GaAs band gap that vanishes upon hydrogenation. In the present Letter, the energetics of N-H complexes and their effects on the band structure of the GaAs0.97N0.03 alloy have been investigated by first-principles density functional methods. We find that monohydrogen N-H+ and dihydrogen N-H* 2 complexes are formed depending on doping. Moreover, only N-H* 2 complexes account for the neutralization of nitrogen effects. A model is proposed that clarifies the passivation mechanism of nitrogen by H.

Journal Article↗
PubMed2001

Bilateral mandibular cysts associated with cyclosporine use: a case report.

Cyclosporin A (CsA) is used in the treatment of patients undergoing renal transplantation. There are a number of side effects associated with its use. In particular, the gingival overgrowth represents the most important in the oral cavity. The authors present a case of bilateral mandibular cysts in an 8-year-old boy, treated with CsA after renal transplantation. The genesis of the mandibular cysts might be associated with the combined use of CsA and a calcium channel blocker post-transplantation. CsA-induced gingival overgrowth might contribute to cysts by two mechanisms: interference with control mechanisms that regulate the reabsorption of gingival stromal tissue, allowing progressive dental eruption, and an increase in the gingival connective tissue components. Gingival hypertrophy might mechanically obstruct the eruption of the developing tooth.

Amlodipine↗
PubMed2000

Self-assembling of In(Ga)As/GaAs quantum dots on (N11) substrates: the (311)A case

We have investigated the In(Ga)As island formation, in the Stranski-Krastanov growth mode, on (311)A GaAs substrates. The surface topography of InAs and InGaAs strained epilayers was studied by contact microscopies. The different substrate affects the overgrown island shape. In(Ga)As grown on (311)A gives rise to quantum wire-like islands. Quantum dots (QDs), but with highly anisotropic shapes, are the outcomes of InAs deposition. QD samples were also characterized by photoluminescence (PL) measurements. Correlation between optical and morphological properties was observed.

Journal Article↗
PubMed1995

[Salivary HIV antibodies. Review of current data and future prospectives].

Medical researchers, especially those involved in AIDS studies, have shown increasing interest in the salivary diagnosis in the recent years. Saliva sample collection is simple, quick, non traumatic and it can be done at low cost. Moreover saliva specimens can be collected without significant infection risks for both patients and operators. The presence of HIV-antibodies in the saliva, along with the above mentioned reasons, makes saliva sample a promising means of testing for HIV antibodies. The attached report summarizes the results of studies carried out by various researchers to assess the reliability of several test methods for HIV-antibodies.

Acquired Immunodeficiency Syndrome↗