Revista de odontologia da Universidade de Sao Paulo最新文献_第5页

Aspectos clínicos da etiologia da hipersensibilidade dentinária cervical 颈牙本质过敏的临床病因

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-04-01 DOI: 10.1590/S0103-06631999000200014

M. Sobral, Narciso Garone Netto

引用次数: 23

In vitro evaluation of marginal microleakage of class II bonded amalgam restorations using a dentin adhesive and a glass ionomer cement 牙本质粘接剂与玻璃离子水门铁对II类银汞合金修复体边缘微渗漏的体外评价

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-04-01 DOI: 10.1590/S0103-06631999000200002

E. S. P. Júnior, M. F. Bijella, S. M. B. Silva, B. G. Vono

{"title":"In vitro evaluation of marginal microleakage of class II bonded amalgam restorations using a dentin adhesive and a glass ionomer cement","authors":"E. S. P. Júnior, M. F. Bijella, S. M. B. Silva, B. G. Vono","doi":"10.1590/S0103-06631999000200002","DOIUrl":"https://doi.org/10.1590/S0103-06631999000200002","url":null,"abstract":"O objetivo deste estudo foi avaliar in vitro a efetividade na prevencao da microinfiltracao do sistema adesivo All Bond 2 associado ao Resinomer (Bisco), e do cimento de ionomero de vidro Vitrebond (3M), sem polimerizacao, em amalgama adesivo classe II, restauradas com Dispersalloy (Dentsply). No grupo controle utilizou-se o verniz cavitario Copalite (Cooley & Cooley). Para tanto, 45 pre-molares humanos integros e extraidos, com finalidade ortodontica, receberam cavidades classe II, sendo uma na face mesial e outra na face distal de cada dente, com a parede cervical localizada a 1mm alem da juncao cemento-esmalte, sendo 30 cavidades em cada grupo. Apos as restauracoes os dentes foram estocados em agua destilada por 24 horas, sofreram termociclagem em agua destilada com 500 ciclos a temperatura de 5°C e 55°C, sendo de 15 segundos em cada banho. Apos o selamento dos apices e raizes, os especimes foram imersos em solucao de fucsina basica a 0,5%, a temperatura de 37°C por 24 horas, lavados em agua corrente por 24 horas e sofreram o seccionamento. A microinfiltracao marginal na parede cervical foi avaliada e os resultados analisados estatisticamente pelo teste de Kruskal-Wallis e de Dunn. Os testes estatisticos demonstraram que houve diferenca estatisticamente significante entre os grupos experimentais e o grupo controle (Copalite), e entre o grupo do All Bond 2/Resinomer e grupo do Vitrebond. O sistema adesivo dentinario All Bond 2 associado ao Resinomer obteve porcentagem menor de microinfiltracao marginal quando comparado ao cimento de ionomero de vidro Vitrebond.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"103-109"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Redução da força de retenção e abertura de grampos a barra em "I" de Roach e sua correlação 罗奇“I”型杆夹紧力和开度的降低及其相关性

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-04-01 DOI: 10.1590/S0103-06631999000200015

C. A. Muzilli, A. Muench

引用次数: 0

Dentição decídua: estudo da prevalência dos espaços interproximais em crianças brasileiras 初级牙列:巴西儿童近端间隙患病率的研究

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-04-01 DOI: 10.1590/S0103-06631999000200010

Vera Mendes Soviero, Eliana Bastos, I. Souza

引用次数: 9

Estudo in situ do efeito da freqüência de ingestão de Coca-Cola na erosão do esmalte-dentina e reversão pela saliva 原位研究可口可乐摄入频率对牙釉质-牙本质侵蚀和唾液逆转的影响

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-04-01 DOI: 10.1590/S0103-06631999000200005

Claudia Emy Fushida, J. Cury

{"title":"Estudo in situ do efeito da freqüência de ingestão de Coca-Cola na erosão do esmalte-dentina e reversão pela saliva","authors":"Claudia Emy Fushida, J. Cury","doi":"10.1590/S0103-06631999000200005","DOIUrl":"https://doi.org/10.1590/S0103-06631999000200005","url":null,"abstract":"The erosive effect of soft drinks on enamel-dentine and the saliva capacity in repairing the alterations was evaluated considering the model adequacy and the absence of research in relation to dentine. Nine volunteers, wearing intra-oral palatal appliances containing 4 enamel and 4 radicular dentine blocks from bovine incisors, participated in this study of 5 phases, in which Coca-Cola (Coke) was consumed from 1 to 8 times/day. Superficial microhardness (SMH) determinations were performed with loads of 50.0 and 15.0 g, respectively for enamel and dentine. The analyses were made: a) 2 h after saliva action; b) after the last intake of coke; c) 24 h after saliva action. The results showed that in function of frequency of coke ingestion, the percentage of microhardness change (% SMHC) ranged from 18.7 to 27.9 for enamel and from 24.6 to 32.6 for dentine. These reduction were statistically significant at 5% (paired \"t\" test). The percentage of microhardness recovery (% SMHR) by saliva action was significant (p 0.05). There was also a significant correlation between frequency of Coca-Cola ingestion and % SMHC, being 0.97 for enamel and 0.72 for dentine. On the other side, in relation to % SMHR the correlation was negative, -0.70 for enamel and -0.74 for dentine. It was concluded that in function of frequency of Coca-Cola ingestion there are proportional and irreversible losses of superficial structure either in the enamel or in the dentine","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"127-134"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 42

Eficácia de substâncias químicas auxiliares na instrumentação de canais radiculares 辅助化学物质在根管预备中的有效性

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-04-01 DOI: 10.1590/S0103-06631999000200009

Jacy Simi Junior, H. F. Pesce, J. M. F. Medeiros

引用次数: 4

Avaliação quantitativa do efeito do jato de bicarbonato de sódio no esmalte de dentes permanentes jovens 小苏打喷射对年轻恒牙釉质的定量评价

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-01-01 DOI: 10.1590/S0103-06631999000100006

S. Marta, J. Lima, Bernardo Gonzales Vono, S. M. B. Silva

{"title":"Avaliação quantitativa do efeito do jato de bicarbonato de sódio no esmalte de dentes permanentes jovens","authors":"S. Marta, J. Lima, Bernardo Gonzales Vono, S. M. B. Silva","doi":"10.1590/S0103-06631999000100006","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100006","url":null,"abstract":"The effect of sodium bicarbonate under pressure used in the prophylaxis of the healthful enamel surface of young permanent teeth was clinically evaluated. Positive reproductions were used, which permitted the analysis before and after the realization of such procedure. The moldings of the vestibular surface of central superior incisives made totalized sixty, which went trough a preparation for the quantitative rugosity analysis of the enamel surfaces. The computer program DIRACOM - 3, that measures the shades and half - shadows of the sample images was used for quantitative analysis for which the scanning electron microscopy was employed. Three experimental groups with twenty children each, who had never been submitted to that technique of prophylaxis were established and molds taken in three moments: Group 1 - before the procedure or control ; Group 2 - immediately after and Group 3 - one month after the treatment ( subgroup 2c ). The quantitative analysis of the data showed that there was not a statistically significant difference between the analyzed groups.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"19-24"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Efeitos da fratura do arco zigomático no crescimento facial em ratos jovens 颧弓骨折对幼龄大鼠面部生长的影响

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-01-01 DOI: 10.1590/S0103-06631999000100009

Elza Maria Villanova Fernandes da Rocha, A. C. Goulart, M. Novelli, João Gualberto de Cerqueira Luz

引用次数: 4

Resistência adesiva de resinas compostas à dentina 复合树脂对牙本质的粘接强度

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-01-01 DOI: 10.1590/S0103-06631999000100011

Joel Bianchi, Leonardo Eloy Rodrigues Filho, José Fortunato Ferreira Santos

引用次数: 8

Processamento radiográfico - câmara escura portátil: relação entre filtro de luz e densidade de base + véu 射线照相处理-便携式暗室:滤光片与基密度+面纱的关系

Revista de odontologia da Universidade de Sao Paulo Pub Date : 1999-01-01 DOI: 10.1590/S0103-06631999000100018

J. R. Tamburús, M.A.S. Lavrador, Antônio César de Oliveira

{"title":"Processamento radiográfico - câmara escura portátil: relação entre filtro de luz e densidade de base + véu","authors":"J. R. Tamburús, M.A.S. Lavrador, Antônio César de Oliveira","doi":"10.1590/S0103-06631999000100018","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100018","url":null,"abstract":"The aim of this study was to assess the base density plus fog of dental X-ray films affected by light filtered through a commercial portable acrylic chamber used for radiography processing. Both Kodak Ultra-speed and Ektaspeed Plus films were placed into an acrylic chamber and submitted to the incidence of simultaneous natural and artificial light for five minutes to mimic a routine procedure in dental practice. Using a time/temperature method, these films were processed in a conventional darkroom together with films from the same sensitivity group that had not been subjected to light incidence (control). Densitometric values were obtained from all samples and the data were analysed by Mann-Whitney tests. The results revealed that films subjected to acrylic chamber conditions presented higher base density plus fog values. Also, when Ultra-speed or Ektaspeed Plus films were compared to films within the respective sensitivity group, the latter group always exhibited higher base density plus fog values. Despite the knowledge that acrylic is able to filter light in a similar degree as the Kodak GBX 2 filter, the highest level of light intensity entering the portable chamber can explain the increased base density plus fog observed in this study.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"93-100"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4