Pesquisa odontologica brasileira = Brazilian oral research最新文献

Metodologias de identificação de marcas de mordidas 咬痕识别方法

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2004-05-17 DOI: 10.11606/D.23.2004.TDE-30082004-141220

Jeidson Antônio Moraes Marques

引用次数: 7

O assessor: personagem central na publicação científica 顾问:科学出版物的中心人物

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2003-12-01 DOI: 10.1590/S1517-74912003000400001

Esther Goldenberg Birman

引用次数: 0

Effect of plaque accumulation and salivary factors on enamel demineralization and plaque composition in situ. 牙菌斑积累和唾液因素对牙釉质脱矿和牙菌斑原位组成的影响。

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2003-10-01 Epub Date: 2004-04-19 DOI: 10.1590/s1517-74912003000400006

Livia Maria Andaló Tenuta, José Eduardo de Oliveira Lima, Celso Luiz Cardoso, Cínthia Pereira Machado Tabchoury, Jaime Aparecido Cury

{"title":"Effect of plaque accumulation and salivary factors on enamel demineralization and plaque composition in situ.","authors":"Livia Maria Andaló Tenuta, José Eduardo de Oliveira Lima, Celso Luiz Cardoso, Cínthia Pereira Machado Tabchoury, Jaime Aparecido Cury","doi":"10.1590/s1517-74912003000400006","DOIUrl":"https://doi.org/10.1590/s1517-74912003000400006","url":null,"abstract":"This study evaluated the effect of some plaque and salivary factors on caries progression in situ. The salivary secretion rate, buffering capacity and mutans streptococci counts from 13 volunteers were determined. For three distinct periods of time, 4, 7 and 10 days, each of them wore a palatal appliance containing 4 bovine enamel blocks. They used a non-fluoridated dentifrice during the experiment and a 20% sucrose solution was dripped onto the blocks 10 times a day. Mutans streptococci (MS), calcium (Ca), and insoluble polysaccharide (IP) were quantified in the dental plaque formed on the enamel blocks, after each period. Enamel demineralization was assessed by surface microhardness, and the percentage of surface microhardness change (%SMC) in relation to the baseline values was calculated. Enamel demineralization occurred after each period of plaque accumulation (p < 0.05), and the %SMC increased with time (from 13.8 to 48.3%). The concentrations of Ca and IP in plaque were not statistically different among the experimental times, but significant correlations were found between these concentrations and %SMC. Neither the salivary factors assessed initially nor mutans streptococci in plaque presented statistically significant correlations to %SMC. The results suggest that enamel demineralization is time-dependent and is more related to the composition of the biofilm formed than to the salivary factors studied.","PeriodicalId":35295,"journal":{"name":"Pesquisa odontologica brasileira = Brazilian oral research","volume":"17 4","pages":"326-31"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s1517-74912003000400006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24487788","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: 32

Effectiveness of EDTA and EDTA-T brushing on the removal of root surface smear layer. EDTA和EDTA- t涂刷去除根表面涂抹层的效果。

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2003-10-01 Epub Date: 2004-04-19 DOI: 10.1590/s1517-74912003000400005

José Eduardo Cezar Sampaio, Ricardo Samih Georges Abi Rached, Gibson Luiz Pilatti, Letícia Helena Theodoro, Luiz Henrique Carvalho Batista

{"title":"Effectiveness of EDTA and EDTA-T brushing on the removal of root surface smear layer.","authors":"José Eduardo Cezar Sampaio, Ricardo Samih Georges Abi Rached, Gibson Luiz Pilatti, Letícia Helena Theodoro, Luiz Henrique Carvalho Batista","doi":"10.1590/s1517-74912003000400005","DOIUrl":"https://doi.org/10.1590/s1517-74912003000400005","url":null,"abstract":"The purpose of this study was to compare the removal of root surface smear layer following active application of EDTA gel and EDTA-T (texapon) gel in different concentrations (5%, 10%, 15%, 20% and 24%), using scanning electron microscopy. A total of 220 dentin blocks obtained from the root surfaces of extracted teeth were divided into 3 groups: Group I - (control) application of saline solution (n = 20); Group II - EDTA gel (pH 7.0) was applied in the following concentrations: 5%, 10%, 15%, 20% and 24% (n = 100); Group III - EDTA-T gel (pH 7.0) applied in the same concentrations described above (n = 100). The photomicrographs were evaluated by one calibrated examiner using a smear layer removal index and following statistical analysis (Kruskal-Wallis test). The results demonstrated that the specimens treated with EDTA and EDTA-T gel presented a better smear layer removal than the control group (p < 0.01); no statistically significant differences were observed between the EDTA and EDTA-T groups and between the concentrations tested (Mann-Whitney, p > 0.05). Within the limits of this study, it can be concluded that all treatment modalities effectively removed the smear layer from the root surface. The addition of texapon into the EDTA gel formulation did not increase its effectiveness.","PeriodicalId":35295,"journal":{"name":"Pesquisa odontologica brasileira = Brazilian oral research","volume":"17 4","pages":"319-25"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s1517-74912003000400005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24488464","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: 8

Smear layer removal capacity of disinfectant solutions used with and without EDTA for the irrigation of canals: a SEM study. 含EDTA和不含EDTA用于沟渠灌溉的消毒液去除涂抹层的能力:扫描电镜研究。

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2003-10-01 Epub Date: 2004-04-19 DOI: 10.1590/s1517-74912003000400010

Ana Carolina Silveira Cardoso de Menezes, Caio Gorgulho Zanet, Márcia Carneiro Valera

{"title":"Smear layer removal capacity of disinfectant solutions used with and without EDTA for the irrigation of canals: a SEM study.","authors":"Ana Carolina Silveira Cardoso de Menezes, Caio Gorgulho Zanet, Márcia Carneiro Valera","doi":"10.1590/s1517-74912003000400010","DOIUrl":"https://doi.org/10.1590/s1517-74912003000400010","url":null,"abstract":"The purpose of this study was to carry out a scanning electron microscopic (SEM) analysis of the cleaning qualities and smear layer removal from root canal walls, instrumented and irrigated with 2.5% NaOCl, 2.0% chlorhexidine and saline solutions. Fifty extracted teeth were used in this study. All teeth were radiographed to determine the existence of a single canal. The crowns were cut at the cervical limit and the root canals were instrumented with K-type files up to size 45. During root canal preparation, irrigations were made with the different solutions being evaluated: Group 1: 2.5% NaOCl (10 roots); Group 2: 2.5% NaOCl and 17% EDTA for 2 minute (10 roots); Group 3: 2.0% chlorhexidine (10 roots); Group 4: 2.0% chlorhexidine and 17% EDTA for 2 minutes (10 roots); Group 5: saline solution (5 roots); Group 6: saline solution and 17% EDTA for 2 minutes (5 roots). After instrumentation, the canals were irrigated with each one of the solutions and the roots were cut in the buccolingual direction for SEM analysis, at the cervical, middle and apical thirds, to ascertain the presence or absence of smear layer and debris. SEM analysis was performed by three calibrated examiners and scores were submitted to Kruskal-Wallis test at the significance level of p = 5%. Results showed that the use of 17% EDTA decreased the smear layer significantly (p < 0.05) for all evaluated solutions in all thirds. When EDTA was not used, a significantly higher quantity of smear layer on the apical third was observed only in the NaOCl groups. The use of 17% EDTA was significant for debris removal except for the chlorhexidine groups. The following conclusion could be drawn: the use of 17% EDTA was necessary to enhance cleanness of the root canals.","PeriodicalId":35295,"journal":{"name":"Pesquisa odontologica brasileira = Brazilian oral research","volume":"17 4","pages":"349-55"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s1517-74912003000400010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24487792","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: 36

The influence of low-level laser therapy on biomodulation of collagen and elastic fibers. 低强度激光治疗对胶原和弹性纤维生物调节的影响。

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2003-10-01 Epub Date: 2004-04-19 DOI: 10.1590/s1517-74912003000400003

Lívia Souza Pugliese, Alena Peixoto Medrado, Sílvia Regina de Almeida Reis, Zilton de Araújo Andrade

{"title":"The influence of low-level laser therapy on biomodulation of collagen and elastic fibers.","authors":"Lívia Souza Pugliese, Alena Peixoto Medrado, Sílvia Regina de Almeida Reis, Zilton de Araújo Andrade","doi":"10.1590/s1517-74912003000400003","DOIUrl":"https://doi.org/10.1590/s1517-74912003000400003","url":null,"abstract":"The study of low-level laser therapy upon extracellular matrix elements is important to understand the wound healing process under this agent. However, little is known about the interference of laser light in relation to collagen and elastic fibers. Cutaneous wounds were performed on the back of 72 Wistar rats and a Ga-Al-As low-level laser was punctually applied with different energy densities. The animals were killed after 24, 48, 72 hours and 5, 7 and 14 days. Tissues were stained with hematoxilin-eosin, sirius red fast green and orcein and then analyzed. It was observed that the treated group exhibited larger reduction of edema and inflammatory infiltrate. The treated animals presented a larger expression of collagen and elastic fibers, although without statistical significance (p > 0.05). Treatment with a dosage of 4 J/cm(2) exhibited more expressive results than that with 8 J/cm(2). In this study, the authors concluded that low-level laser therapy contributed to a larger expression of collagen and elastic fibers during the early phases of the wound healing process.","PeriodicalId":35295,"journal":{"name":"Pesquisa odontologica brasileira = Brazilian oral research","volume":"17 4","pages":"307-13"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s1517-74912003000400003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24488462","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: 136

Prevalence of microorganisms in root canals of human deciduous teeth with necrotic pulp and chronic periapical lesions. 牙髓坏死和慢性根尖周病变的乳牙根管内微生物的流行。

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2003-10-01 Epub Date: 2004-04-19 DOI: 10.1590/s1517-74912003000400013

Luciana Cunha Pazelli, Aldevina Campos de Freitas, Izabel Yoko Ito, Maria Cristina Monteiro de Souza-Gugelmin, Alexandra Sárzyla Medeiros, Paulo Nelson-Filho

引用次数: 59

In vitro evaluation of human dental enamel surface roughness bleached with 35% carbamide peroxide and submitted to abrasive dentifrice brushing. 35%过氧化脲漂白和磨料刷牙对人牙釉质表面粗糙度的体外评价。

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2003-10-01 Epub Date: 2004-04-19 DOI: 10.1590/s1517-74912003000400009

Claudia Cia Worschech, José Augusto Rodrigues, Luis Roberto Marcondes Martins, Gláucia Maria Bovi Ambrosano

{"title":"In vitro evaluation of human dental enamel surface roughness bleached with 35% carbamide peroxide and submitted to abrasive dentifrice brushing.","authors":"Claudia Cia Worschech, José Augusto Rodrigues, Luis Roberto Marcondes Martins, Gláucia Maria Bovi Ambrosano","doi":"10.1590/s1517-74912003000400009","DOIUrl":"https://doi.org/10.1590/s1517-74912003000400009","url":null,"abstract":"The aim of this in vitro study was to evaluate the surface roughness of human enamel bleached with 35% carbamide peroxide at different times and submitted to different superficial cleaning treatments: G1 - not brushed; G2 - brushed with fluoride abrasive dentifrice; G3 - brushed with a non-fluoride abrasive dentifrice; G4 - brushed without dentifrice. Sixty fragments of human molar teeth with 4 x 4 mm were obtained using a diamond disc. The specimens were polished with sandpaper and abrasive pastes. A perfilometer was used to measure roughness average (Ra) values of the initial surface roughness and at each 7-day-interval after the beginning of treatment. The bleaching was performed on the surface of the fragments for 1 hour a week, and the surface cleaning treatment for 3 minutes daily. The samples were stored in individual receptacles with artificial saliva. Analysis of variance and the Tukey test revealed significant differences in surface roughness values for G2 and G3, which showed an increase in roughness over time; G1 and G4 showed no significant roughness differences. The bleaching with 35% carbamide peroxide did not alter the enamel surface roughness, but when the bleaching treatment was performed combined with brushing with abrasive dentifrices, there was a significant increase in roughness values.","PeriodicalId":35295,"journal":{"name":"Pesquisa odontologica brasileira = Brazilian oral research","volume":"17 4","pages":"342-8"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s1517-74912003000400009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24487790","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: 67

Short-term immunosuppressive therapy does not affect the density of the pre-existing bone around titanium implants placed in rabbits. 短期免疫抑制治疗不会影响兔体内钛植入物周围原有骨的密度。

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2003-10-01 Epub Date: 2004-04-19 DOI: 10.1590/s1517-74912003000400012

Poliana Mendes Duarte, Getúlio Rocha Nogueira Filho, Enilson Antônio Sallum, Antonio Wilson Sallum, Francisco Humberto Nociti Júnior

{"title":"Short-term immunosuppressive therapy does not affect the density of the pre-existing bone around titanium implants placed in rabbits.","authors":"Poliana Mendes Duarte, Getúlio Rocha Nogueira Filho, Enilson Antônio Sallum, Antonio Wilson Sallum, Francisco Humberto Nociti Júnior","doi":"10.1590/s1517-74912003000400012","DOIUrl":"https://doi.org/10.1590/s1517-74912003000400012","url":null,"abstract":"The aim of this study was to evaluate the influence of the administration and withdrawal of cyclosporin A/nifedipine on the bone density in a lateral area adjacent to implants placed in rabbits. Two screw-type titanium implants were placed bilaterally in twenty-eight New Zealand rabbits. The animals were assigned to one of the following groups and received daily subcutaneous injections for 14 days: Groups A and C: vehicle (dimethyl sulfoxide); Groups B and D: CsA (10 mg/kg) plus nifedipine (50 mg/kg). The animals in Groups A and B were sacrificed 14 days postoperatively and, in Groups C and D, 42 days postoperatively. After sacrifice, the tibiae were removed and undecalcified sections were obtained. Bone density was obtained in a 500 mm-wide zone lateral to the implant surface. Intergroup analysis showed no significant difference (p > 0.05) in the degree of bone density between control and test groups either on day 14 or on day 42. Thus, it appears that a short-term immunosuppressive therapy may not present a negative influence on the density of the pre-existing bone around titanium implants placed in rabbits.","PeriodicalId":35295,"journal":{"name":"Pesquisa odontologica brasileira = Brazilian oral research","volume":"17 4","pages":"362-6"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s1517-74912003000400012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24487795","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: 12

Kinesiographic study of complete denture movement related to mucosa displacement in edentulous patients. 无牙患者全口义齿运动与黏膜移位的运动学研究。

Pesquisa odontologica brasileira = Brazilian oral research Pub Date : 2003-10-01 Epub Date: 2004-04-19 DOI: 10.1590/s1517-74912003000400011

Marco Antonio Compagnoni, Raphael Freitas de Souza, Cláudio Rodrigues Leles

{"title":"Kinesiographic study of complete denture movement related to mucosa displacement in edentulous patients.","authors":"Marco Antonio Compagnoni, Raphael Freitas de Souza, Cláudio Rodrigues Leles","doi":"10.1590/s1517-74912003000400011","DOIUrl":"https://doi.org/10.1590/s1517-74912003000400011","url":null,"abstract":"The mucosa that covers the residual ridges of edentulous patients may present some distortion or displacement when occlusal loading is applied in complete dentures. This distortion and movement of the denture can result in acceleration of residual ridge resorption and loss of retention and stability. The aim of this study was to analyze the pattern of upper complete denture movement related to underlying mucosa displacement. A sample of 10 complete denture wearers was randomly selected, which had acceptable upper and lower dentures and normal volume and resilience of residual ridges. The kinesiographic instrument K6-I Diagnostic System was used to measure denture movements, according to the method proposed by Maeda et al.7, 1984. Denture movements were measured under the following experimental conditions: (A) 3 maximum voluntary clenching cycles and (B) unilateral chewing for 20 seconds. The results showed that under physiological load, oral mucosa distortion has two distinct phases: a fast initial displacement as load is applied and a slower and incomplete recovery when load is removed. Intermittent loading such as chewing progressively reduces the magnitude of the denture displacement and the recovery of the mucosa is gradually more incomplete.","PeriodicalId":35295,"journal":{"name":"Pesquisa odontologica brasileira = Brazilian oral research","volume":"17 4","pages":"356-61"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/s1517-74912003000400011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"24487793","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: 29