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Papers by Fernando Ricardo Xavier da Silveira

Research paper thumbnail of Lesões ulcerativas de vésico bolhosas

Research paper thumbnail of Epstein-barr vírus e coxsackie vírus: manifestaçöes clínicas na cavidade bucal

Rev Odontol Unicid, Jun 1, 1994

Research paper thumbnail of Freqüência e biosorotipagem de amostras de Candida Albicans da mucosa jugal de portadores saudáveis, dentados, fumantes e não-fumantes

Research paper thumbnail of Displasia ectodérmica hereditaria: revisión de interés estomatológico y caso clínico

Revista De La Asociacion Odontologica Argentina, 1997

... Id: 200125. Autor: Paraiso Cavalcanti, Marcelo de Gusmäo; Xavier da Silveira, Fernando Ricard... more ... Id: 200125. Autor: Paraiso Cavalcanti, Marcelo de Gusmäo; Xavier da Silveira, Fernando Ricardo. Título: Displasia ectodérmica hereditaria: revisión de interés estomatológico y caso clínico / Hereditary ectodermal dysplasia: review of stomatological interest and clinical case. ...

Research paper thumbnail of Síndrome de Beckwith-Wiedemann: considerações de interesse clínico e relato de caso

Rev Fac Odontol F Z L, Dec 1, 1990

Research paper thumbnail of Hemofilia: aspectos de interesse odontológico

Rpg Rev Pos Grad, Jun 1, 1994

Research paper thumbnail of Brasileiros comem cada vez mais e com pior qualidade

Rev Assoc Paul Cir Dent, Feb 1, 1999

Base de dados : BBO. Pesquisa : 4844 [Identificador único]. Referências encontradas : 1 [refinar]... more Base de dados : BBO. Pesquisa : 4844 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, BBO, seleciona. para imprimir. Fotocópia. Silveira, Fernando Ricardo Xavier da. Biazolla, Eder Ricardo. ...

Research paper thumbnail of Candida albicans isolates from the oral mucosa of healthy carriers

Rev Microbiol, Dec 1, 1995

Research paper thumbnail of A study of oral mucosal lesions in geriatric patients

Revista Da Faculdade De Odontologia Da Fzl, 1991

Research paper thumbnail of Biotypes of Candida albicans isolates from the oral mucosa of HIV seropositive and control subjects

Revista Odonto Ciencia, 2009

Purpose: This study evaluated the Candida albicans biotypes from oral mucosa according to some ho... more Purpose: This study evaluated the Candida albicans biotypes from oral mucosa according to some host variables, such as HIV infection; medication use-protease inhibitors (PI), non protease inhibitors (NPI) or no medication (NM); dental prosthesis wearing (PW) or not (NPW); and yeast variables (activity levels of protease and phospholipase). Methods: Samples from the oral mucosa of 193 HIV + subjects and 205 HIVsubjects were collected by means of sterile swabs and seeded onto Sabouraud dextrose agar. The isolates were identified by microculture on slide, germ tube formation, auxanogram, and zimogram. Ninety-two isolates were obtained from HIV + individuals: 49 from patients under PI, 31 from patients under NPI and 12 from patients with no medication. The control group comprised 63 isolates from HIVpatients. Results: From the 95 possible C. albicans biotypes, 46 were identified in the sample, and the most prevalent were: 10122 (46.4%); 11122 (38.01%); 01031 (42.4%); 00022 (40%); (P<0.01-Spearman correlation test). No difference was detected among PI, NPI, and NM groups. The control group exhibited intermediate enzymatic activity level from dentate isolates, and high protease activity level amongst isolates from prosthesis wearers. Conclusion: It was not possible to detect any inhibitory action of PI drugs on the enzymatic activity of C. albicans.

Research paper thumbnail of Guia de orienta��o e normas da Sociedade Brasileira de Pesquisa Odontol�gica (SBPqO)

Research paper thumbnail of Changes in cortical bone channels network and osteocyte organization after the use of zoledronic acid

Archives of Endocrinology and Metabolism, 2015

Objective: The aim of this study was to evaluate the effects of zoledronic acid (ZA) on the corti... more Objective: The aim of this study was to evaluate the effects of zoledronic acid (ZA) on the cortical bone channels network (CBCN) and osteocyte organization in relation to the bone channels. Mate rials and methods: Eighteen male Wistar rats were divided into control (CG) and test groups (TG). Twelve animals from TG received 3 ZA doses (7.5 µg/kg), and 6 animals from CG did not receive any medication. TG animals were euthanized at 14 (n = 6) and 75 (n = 6) days after drug injection. CBCN was analyzed in mandibles and tibias using computational routines. The osteocyte organization was qualitatively evaluated in tibias using a three-dimensional reconstruction of images from serial histological sections. Results: Significant differences in CBCN of tibia were found between the treated and untreated rats, with a wider range of sizes and shapes of the channels after the use of ZA (channels area p = 0.0063, channels area SD p = 0.0276) and less bone matrix (bone volume p = 0.0388). The alterations in the channels' morphology were more evident at 75 days after the drug injection (channels perimeter p = 0.0286). No differences were found in mandibles CBCN. The osteocyte distribution revealed more variable patterns of cell distribution in ZA groups, with non-homogeneous distribution of cells in relation to the bone channels. Conclusion: Zoledronic acid induces structural changes in CBCN and modifies the osteocyte arrangement in cortical bone in the tibia; also, the variability in the morphology of bone channels became more evident after a certain time of the use of the drug. Arch

Research paper thumbnail of Epstein-Barr vírus and Coxsackie vírus: clinical manifestations in the oral cavity

The viruses infections stand among the most prevailing ones in humans. Many of them, however, are... more The viruses infections stand among the most prevailing ones in humans. Many of them, however, are not correctly diagnosed. In the present study, the authors bring to discussion the Epstein-Barr virus and the Coxsackie viruses, and their most common features in the oral cavity. Knowledge of their basic characteristicsby the generalist is also stressed. contributing for the correct diagnosis and management of trhese viral diseases.

Research paper thumbnail of Fichario clínico computadorizado em Odontologia

Research paper thumbnail of Hemangiomas - considerations of stomatological interest

Hemangioma is the most common within the angiomas which raise on oral cavity. The diagnosis for s... more Hemangioma is the most common within the angiomas which raise on oral cavity. The diagnosis for such lesions on soft tissues is basically clinical. Otherwise, for those intraosseous lesions it becomes, sometimes, difficult. In this study the authors bring the fundamental characteristics of those hemangiomas which grow in the maxillomandibular complex, emphasizing their diagnosis and tratment.

Research paper thumbnail of Digitized clinical images transmitted from workstations (terminals) to a server computer through local network

No presente trabalho os autores descrevem uma alternativa para captação, digitalização e transmis... more No presente trabalho os autores descrevem uma alternativa para captação, digitalização e transmissão de imagens entre computador (servidor) e microcomputadores (estações de trabalho), ligados através de rede local, com vistas ao apoio ao ensino e pesquisa em Estomatologia Clínica.

Research paper thumbnail of Fibrous inflammatory hyperplasia: therapeutical approaches

Research paper thumbnail of Patología oral y gingival en 100 pacientes brasileños infectados por el VIH

The authors studied 100 brazilian HIV-infected patients taking in accounttheir possible gingival ... more The authors studied 100 brazilian HIV-infected patients taking in accounttheir possible gingival alterations compared to oral findings in general. The sample was constituted by 95 men and 5 women, aged form 16 to 54 years (mean age 28). The major aspects of these patients were related t gingival and periodontal status. A moderate gingivitis could be observed in 38% while periodontitis comprised 31%. Among the oral infectious diseases, candidiasis was seen in 42% of the subjects, being 15% in gingiva. The pseudo-membranous type was the mnost common, sometimes associated to erythematous type. Anug was detected in 13% of the opatients. Herpes simplex was seen in 2% and unspecific ulcers, some of them related to Gram negative bacteries, were found in 5% of the individuals. Kaposi's sarcoma was the only malignancy found, comprising 6% of frequency, being 2% exclusively located in gingiva. Other alterations also seen were pyogenic granuloma (1%) and melanin pigmentation (2%). In view ...

Research paper thumbnail of Correlation between gender, temporomandibular joint disc position and clinical findings in patients with temporomandibular disorder

Medical Express, 2015

The objective of this study was to assess gender differences in temporomandibular joint disc posi... more The objective of this study was to assess gender differences in temporomandibular joint disc position using magnetic resonance imaging and to check for symptoms in patients with temporomandibular disorders. MATERIALS AND METHODS: Eighty-seven consecutive patients (70 females and 17 males) were evaluated. Bilateral magnetic resonance imaging was performed to determine the temporomandibular joint disc positions; these were divided into four diagnostic categories: no disc displacement, right disc displacement, left disc displacement and bilateral disc displacement. The clinical data assessed were pain on muscle and temporomandibular joint palpation. The data were analyzed using the Fisher's exact test, chi-square test or analysis of variance. Significance was set at p ≤ .05. RESULTS: The study population had more females (80.5%) than males (19.5%) and the mean age of females (31 ± 11 years) was lower than the mean age of males (41 ± 12 years). Bilateral disc displacement was significantly most frequent in females. Clinical examination showed more pain on muscle palpation for female than for male patients. CONCLUSION: Women had a higher frequency of temporomandibular joint disc displacement, as well as a larger number of painful points on muscle palpation than men.

Research paper thumbnail of Aplicação de um sistema gerenciador de banco de dados relacional sediado em microcomputado, para armazenemento, manutenção e recuperção de informações im estomatologia clínica

Research paper thumbnail of Lesões ulcerativas de vésico bolhosas

Research paper thumbnail of Epstein-barr vírus e coxsackie vírus: manifestaçöes clínicas na cavidade bucal

Rev Odontol Unicid, Jun 1, 1994

Research paper thumbnail of Freqüência e biosorotipagem de amostras de Candida Albicans da mucosa jugal de portadores saudáveis, dentados, fumantes e não-fumantes

Research paper thumbnail of Displasia ectodérmica hereditaria: revisión de interés estomatológico y caso clínico

Revista De La Asociacion Odontologica Argentina, 1997

... Id: 200125. Autor: Paraiso Cavalcanti, Marcelo de Gusmäo; Xavier da Silveira, Fernando Ricard... more ... Id: 200125. Autor: Paraiso Cavalcanti, Marcelo de Gusmäo; Xavier da Silveira, Fernando Ricardo. Título: Displasia ectodérmica hereditaria: revisión de interés estomatológico y caso clínico / Hereditary ectodermal dysplasia: review of stomatological interest and clinical case. ...

Research paper thumbnail of Síndrome de Beckwith-Wiedemann: considerações de interesse clínico e relato de caso

Rev Fac Odontol F Z L, Dec 1, 1990

Research paper thumbnail of Hemofilia: aspectos de interesse odontológico

Rpg Rev Pos Grad, Jun 1, 1994

Research paper thumbnail of Brasileiros comem cada vez mais e com pior qualidade

Rev Assoc Paul Cir Dent, Feb 1, 1999

Base de dados : BBO. Pesquisa : 4844 [Identificador único]. Referências encontradas : 1 [refinar]... more Base de dados : BBO. Pesquisa : 4844 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, BBO, seleciona. para imprimir. Fotocópia. Silveira, Fernando Ricardo Xavier da. Biazolla, Eder Ricardo. ...

Research paper thumbnail of Candida albicans isolates from the oral mucosa of healthy carriers

Rev Microbiol, Dec 1, 1995

Research paper thumbnail of A study of oral mucosal lesions in geriatric patients

Revista Da Faculdade De Odontologia Da Fzl, 1991

Research paper thumbnail of Biotypes of Candida albicans isolates from the oral mucosa of HIV seropositive and control subjects

Revista Odonto Ciencia, 2009

Purpose: This study evaluated the Candida albicans biotypes from oral mucosa according to some ho... more Purpose: This study evaluated the Candida albicans biotypes from oral mucosa according to some host variables, such as HIV infection; medication use-protease inhibitors (PI), non protease inhibitors (NPI) or no medication (NM); dental prosthesis wearing (PW) or not (NPW); and yeast variables (activity levels of protease and phospholipase). Methods: Samples from the oral mucosa of 193 HIV + subjects and 205 HIVsubjects were collected by means of sterile swabs and seeded onto Sabouraud dextrose agar. The isolates were identified by microculture on slide, germ tube formation, auxanogram, and zimogram. Ninety-two isolates were obtained from HIV + individuals: 49 from patients under PI, 31 from patients under NPI and 12 from patients with no medication. The control group comprised 63 isolates from HIVpatients. Results: From the 95 possible C. albicans biotypes, 46 were identified in the sample, and the most prevalent were: 10122 (46.4%); 11122 (38.01%); 01031 (42.4%); 00022 (40%); (P<0.01-Spearman correlation test). No difference was detected among PI, NPI, and NM groups. The control group exhibited intermediate enzymatic activity level from dentate isolates, and high protease activity level amongst isolates from prosthesis wearers. Conclusion: It was not possible to detect any inhibitory action of PI drugs on the enzymatic activity of C. albicans.

Research paper thumbnail of Guia de orienta��o e normas da Sociedade Brasileira de Pesquisa Odontol�gica (SBPqO)

Research paper thumbnail of Changes in cortical bone channels network and osteocyte organization after the use of zoledronic acid

Archives of Endocrinology and Metabolism, 2015

Objective: The aim of this study was to evaluate the effects of zoledronic acid (ZA) on the corti... more Objective: The aim of this study was to evaluate the effects of zoledronic acid (ZA) on the cortical bone channels network (CBCN) and osteocyte organization in relation to the bone channels. Mate rials and methods: Eighteen male Wistar rats were divided into control (CG) and test groups (TG). Twelve animals from TG received 3 ZA doses (7.5 µg/kg), and 6 animals from CG did not receive any medication. TG animals were euthanized at 14 (n = 6) and 75 (n = 6) days after drug injection. CBCN was analyzed in mandibles and tibias using computational routines. The osteocyte organization was qualitatively evaluated in tibias using a three-dimensional reconstruction of images from serial histological sections. Results: Significant differences in CBCN of tibia were found between the treated and untreated rats, with a wider range of sizes and shapes of the channels after the use of ZA (channels area p = 0.0063, channels area SD p = 0.0276) and less bone matrix (bone volume p = 0.0388). The alterations in the channels' morphology were more evident at 75 days after the drug injection (channels perimeter p = 0.0286). No differences were found in mandibles CBCN. The osteocyte distribution revealed more variable patterns of cell distribution in ZA groups, with non-homogeneous distribution of cells in relation to the bone channels. Conclusion: Zoledronic acid induces structural changes in CBCN and modifies the osteocyte arrangement in cortical bone in the tibia; also, the variability in the morphology of bone channels became more evident after a certain time of the use of the drug. Arch

Research paper thumbnail of Epstein-Barr vírus and Coxsackie vírus: clinical manifestations in the oral cavity

The viruses infections stand among the most prevailing ones in humans. Many of them, however, are... more The viruses infections stand among the most prevailing ones in humans. Many of them, however, are not correctly diagnosed. In the present study, the authors bring to discussion the Epstein-Barr virus and the Coxsackie viruses, and their most common features in the oral cavity. Knowledge of their basic characteristicsby the generalist is also stressed. contributing for the correct diagnosis and management of trhese viral diseases.

Research paper thumbnail of Fichario clínico computadorizado em Odontologia

Research paper thumbnail of Hemangiomas - considerations of stomatological interest

Hemangioma is the most common within the angiomas which raise on oral cavity. The diagnosis for s... more Hemangioma is the most common within the angiomas which raise on oral cavity. The diagnosis for such lesions on soft tissues is basically clinical. Otherwise, for those intraosseous lesions it becomes, sometimes, difficult. In this study the authors bring the fundamental characteristics of those hemangiomas which grow in the maxillomandibular complex, emphasizing their diagnosis and tratment.

Research paper thumbnail of Digitized clinical images transmitted from workstations (terminals) to a server computer through local network

No presente trabalho os autores descrevem uma alternativa para captação, digitalização e transmis... more No presente trabalho os autores descrevem uma alternativa para captação, digitalização e transmissão de imagens entre computador (servidor) e microcomputadores (estações de trabalho), ligados através de rede local, com vistas ao apoio ao ensino e pesquisa em Estomatologia Clínica.

Research paper thumbnail of Fibrous inflammatory hyperplasia: therapeutical approaches

Research paper thumbnail of Patología oral y gingival en 100 pacientes brasileños infectados por el VIH

The authors studied 100 brazilian HIV-infected patients taking in accounttheir possible gingival ... more The authors studied 100 brazilian HIV-infected patients taking in accounttheir possible gingival alterations compared to oral findings in general. The sample was constituted by 95 men and 5 women, aged form 16 to 54 years (mean age 28). The major aspects of these patients were related t gingival and periodontal status. A moderate gingivitis could be observed in 38% while periodontitis comprised 31%. Among the oral infectious diseases, candidiasis was seen in 42% of the subjects, being 15% in gingiva. The pseudo-membranous type was the mnost common, sometimes associated to erythematous type. Anug was detected in 13% of the opatients. Herpes simplex was seen in 2% and unspecific ulcers, some of them related to Gram negative bacteries, were found in 5% of the individuals. Kaposi's sarcoma was the only malignancy found, comprising 6% of frequency, being 2% exclusively located in gingiva. Other alterations also seen were pyogenic granuloma (1%) and melanin pigmentation (2%). In view ...

Research paper thumbnail of Correlation between gender, temporomandibular joint disc position and clinical findings in patients with temporomandibular disorder

Medical Express, 2015

The objective of this study was to assess gender differences in temporomandibular joint disc posi... more The objective of this study was to assess gender differences in temporomandibular joint disc position using magnetic resonance imaging and to check for symptoms in patients with temporomandibular disorders. MATERIALS AND METHODS: Eighty-seven consecutive patients (70 females and 17 males) were evaluated. Bilateral magnetic resonance imaging was performed to determine the temporomandibular joint disc positions; these were divided into four diagnostic categories: no disc displacement, right disc displacement, left disc displacement and bilateral disc displacement. The clinical data assessed were pain on muscle and temporomandibular joint palpation. The data were analyzed using the Fisher's exact test, chi-square test or analysis of variance. Significance was set at p ≤ .05. RESULTS: The study population had more females (80.5%) than males (19.5%) and the mean age of females (31 ± 11 years) was lower than the mean age of males (41 ± 12 years). Bilateral disc displacement was significantly most frequent in females. Clinical examination showed more pain on muscle palpation for female than for male patients. CONCLUSION: Women had a higher frequency of temporomandibular joint disc displacement, as well as a larger number of painful points on muscle palpation than men.

Research paper thumbnail of Aplicação de um sistema gerenciador de banco de dados relacional sediado em microcomputado, para armazenemento, manutenção e recuperção de informações im estomatologia clínica