Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100003
E. G. Júnior, M. J. Ávila-Campos
Foi avaliada a susceptibilidade de oitenta isolados de F. nucleatum obtidos de pacientes com doenca periodontal, individuos sadios e Cebus apella (macaco-prego) frente ao soro humano. A resistencia a atividade bactericida do soro foi observada em 46,9% das fusobacterias isoladas de pacientes com doenca periodontal, 28,6% das obtidas de individuos sadios e em 40% das fusobacterias de primatas nao humanos. Esses resultados suportam o conceito de que o soro possui um papel ecologico em controlar a populacao microbiana no interior do sulco gengival ou bolsa periodontal.
{"title":"Antimicrobial effect of human serum on oral Fusobacterium nucleatum isolates from humans and monkeys","authors":"E. G. Júnior, M. J. Ávila-Campos","doi":"10.1590/S0103-06631999000100003","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100003","url":null,"abstract":"Foi avaliada a susceptibilidade de oitenta isolados de F. nucleatum obtidos de pacientes com doenca periodontal, individuos sadios e Cebus apella (macaco-prego) frente ao soro humano. A resistencia a atividade bactericida do soro foi observada em 46,9% das fusobacterias isoladas de pacientes com doenca periodontal, 28,6% das obtidas de individuos sadios e em 40% das fusobacterias de primatas nao humanos. Esses resultados suportam o conceito de que o soro possui um papel ecologico em controlar a populacao microbiana no interior do sulco gengival ou bolsa periodontal.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"01-04"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652487","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}
Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100015
José Augusto César Discacciati, A. Neves, Isabela Almeida Pordeus
With the objective of assessing patients perception of acquiring HIV virus in the dental practice and evaluating their attitudes towards continuing the treatment with dentists who treat HIV individuals or who are HIV positive themselves, 518 interviews were carried out with members of the Military Police of Minas Gerais and their dependents who had recently completed their treatment with 233 different practitioners. It was observed that the vast majority of the participants (88.4%) believed that HIV virus could be transmitted during dental procedures. Several interviewees reported that they would not return to their dentists if s/he was caring for HIV patients (42.9%) nor if s/he was HIV positive her/himself (45.0%). Those participants treated by dentists who adopted adequate barrier techniques were more likely to continue their treatment if the professional was treating HIV patients. However, there was not a direct association between the adoption of barrier techniques and the acceptance of being treated by an HIV positive dentist. The present findings suggest that more information should be transmitted to the public about the risk of HIV infection and its prevention in the dental setting.
{"title":"Aids e controle de infecção cruzada na prática odontológica: percepção e atitudes dos pacientes","authors":"José Augusto César Discacciati, A. Neves, Isabela Almeida Pordeus","doi":"10.1590/S0103-06631999000100015","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100015","url":null,"abstract":"With the objective of assessing patients perception of acquiring HIV virus in the dental practice and evaluating their attitudes towards continuing the treatment with dentists who treat HIV individuals or who are HIV positive themselves, 518 interviews were carried out with members of the Military Police of Minas Gerais and their dependents who had recently completed their treatment with 233 different practitioners. It was observed that the vast majority of the participants (88.4%) believed that HIV virus could be transmitted during dental procedures. Several interviewees reported that they would not return to their dentists if s/he was caring for HIV patients (42.9%) nor if s/he was HIV positive her/himself (45.0%). Those participants treated by dentists who adopted adequate barrier techniques were more likely to continue their treatment if the professional was treating HIV patients. However, there was not a direct association between the adoption of barrier techniques and the acceptance of being treated by an HIV positive dentist. The present findings suggest that more information should be transmitted to the public about the risk of HIV infection and its prevention in the dental setting.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"75-82"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652842","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}
Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100005
Tatiana Andrade Leite, Marcelo Sabioni de Paula, R. A. Ribeiro, I. Leite
This study determined the sugar consumption and its relationship to caries development in a group of 51 public nursery school children (mean age = 48 months). The dmf-t score (number of decayed, missing and filled primary teeth) was recorded for each child. A four-day diary was obtained using the local observation method and the average sugar consumption was calculated. The mean dmf-t score was 2.75. From the 51 children examined, 15 were caries free (29.4%) and 36 (70.6%) had caries development. The average sugar consumption was 130g/day. An increase in the sugar consumption has been associated with a significant increase in the dmf-t score.
{"title":"Cárie dental e consumo de açúcar em crianças assistidas por creche pública","authors":"Tatiana Andrade Leite, Marcelo Sabioni de Paula, R. A. Ribeiro, I. Leite","doi":"10.1590/S0103-06631999000100005","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100005","url":null,"abstract":"This study determined the sugar consumption and its relationship to caries development in a group of 51 public nursery school children (mean age = 48 months). The dmf-t score (number of decayed, missing and filled primary teeth) was recorded for each child. A four-day diary was obtained using the local observation method and the average sugar consumption was calculated. The mean dmf-t score was 2.75. From the 51 children examined, 15 were caries free (29.4%) and 36 (70.6%) had caries development. The average sugar consumption was 130g/day. An increase in the sugar consumption has been associated with a significant increase in the dmf-t score.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"13-18"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652553","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}
Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100016
M. D. S. Neto, L. F. Guimarães, D. Z. Guerisoli, P. C. Saquy, J. D. PÉcora
In this study, the effect on the setting time by the addition of different kinds of rosin and hydrogenated resin on the Grossman cement powder was evaluated. The experiments were carried out following the American Dental Associations specification number 57 for root canal sealers. For this analysis, different Grossman cement powders were prepared using different rosins (X, WW and WG) and hydrogenated resins (Staybelite and Staybelite ester 10). The study of the physicochemical properties of the Grossman cements obtained the different kinds of rosins and hydrogenated resins interference on the cements setting time. The hydrogenated resin, having a higher pH, increased the setting time of the cement when compared to the X, WW and WG rosins.
{"title":"Influence of different kinds of rosins and hydrogenated resins on the setting time of Grossman cements","authors":"M. D. S. Neto, L. F. Guimarães, D. Z. Guerisoli, P. C. Saquy, J. D. PÉcora","doi":"10.1590/S0103-06631999000100016","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100016","url":null,"abstract":"In this study, the effect on the setting time by the addition of different kinds of rosin and hydrogenated resin on the Grossman cement powder was evaluated. The experiments were carried out following the American Dental Associations specification number 57 for root canal sealers. For this analysis, different Grossman cement powders were prepared using different rosins (X, WW and WG) and hydrogenated resins (Staybelite and Staybelite ester 10). The study of the physicochemical properties of the Grossman cements obtained the different kinds of rosins and hydrogenated resins interference on the cements setting time. The hydrogenated resin, having a higher pH, increased the setting time of the cement when compared to the X, WW and WG rosins.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"83-87"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652881","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}
Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100004
S. Saito, Helena Maria Usberti Deccico, M. N. D. Santos
This study was carried out to determine the prevalence of caries in pre-school children and inquire into infant feeding history and associated factors. One hundred fifty six children of ages from 18 to 48 months were clinically examined for dental caries (dmf-t and dmf-s) by one investigator, who was unaware of the mothers responses to the questionnaire administered by an interviewer. The results were analyzed using non-parametric tests, chi-squared and Man Whitney U. Overall mean dmf-s per children was 3,4 with 40% of the subjects being caries free. It was observed that of those with caries, 36 e 24% had a dmf-t higher than 0 and 4 respectively. The percentage of caries free and not caries free subjects were 42 and 57% for those only breast, 38 and 62% for breast and bottle and 30 and 70% for only bottle fed children. Nursing caries were seen in 20% of the subjects. Bottle fed children were more likely to have nursing caries than those only breast fed. Of those with nursing caries, 77% had been fed for more than 12 months. The mean dmf-t for children in social classes I, II and III were 1.6, 3.6 and 3.1 with 50%, 25% and 29% caries free, respectively. Similarly, children whose mothers had a post-graduation or a college degree had a mean dmf-t significantly lower than those whose mothers finished middle school (p < 0,05). It was concluded that the prevalence of caries in early childhood is relatively high in Piracicaba. The children having nursing caries tended to keep their nursing habits for more than 12 months.
{"title":"Efeito da prática de alimentação infantil e de fatores associados sobre a ocorrência da cárie dental em pré-escolares de 18 a 48 meses","authors":"S. Saito, Helena Maria Usberti Deccico, M. N. D. Santos","doi":"10.1590/S0103-06631999000100004","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100004","url":null,"abstract":"This study was carried out to determine the prevalence of caries in pre-school children and inquire into infant feeding history and associated factors. One hundred fifty six children of ages from 18 to 48 months were clinically examined for dental caries (dmf-t and dmf-s) by one investigator, who was unaware of the mothers responses to the questionnaire administered by an interviewer. The results were analyzed using non-parametric tests, chi-squared and Man Whitney U. Overall mean dmf-s per children was 3,4 with 40% of the subjects being caries free. It was observed that of those with caries, 36 e 24% had a dmf-t higher than 0 and 4 respectively. The percentage of caries free and not caries free subjects were 42 and 57% for those only breast, 38 and 62% for breast and bottle and 30 and 70% for only bottle fed children. Nursing caries were seen in 20% of the subjects. Bottle fed children were more likely to have nursing caries than those only breast fed. Of those with nursing caries, 77% had been fed for more than 12 months. The mean dmf-t for children in social classes I, II and III were 1.6, 3.6 and 3.1 with 50%, 25% and 29% caries free, respectively. Similarly, children whose mothers had a post-graduation or a college degree had a mean dmf-t significantly lower than those whose mothers finished middle school (p < 0,05). It was concluded that the prevalence of caries in early childhood is relatively high in Piracicaba. The children having nursing caries tended to keep their nursing habits for more than 12 months.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"05-11"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652538","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}
Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100013
J. M. D. D. A. Rollo, Sérgio Mazzer Rossitti
One of the technological applications where a metal-ceramic compatibility is necessary, is the dental restoration build-up, known as metaloceramic. In this case, a porcelain is fused on a metal substructure to have a dental prosthesis. The basic requirement for the success of this dental restoration is the adjustment of the thermal expansion coefficient of each material to achieve a compression stress on the ceramic layer. This study was carried out to obtain the thermal expansion curves for Ni-Cr alloy and dental porcelains to analyze the thermal compatibility between metal-ceramic. Simulating the introduction of a product on the market, an experimental Ni-Cr alloy was developed and compared with another largely commercialized Ni-Cr alloy. By analyzing these data, it was possible to verify the compatibility of each metal-ceramic pair regarding the thermal expansion behavior, using the Yamamotos (1985) methods. In conclusion, the results of the new experimental alloy showed values that can include it as one more option inside the Ni-Cr alloy family used in metaloceramic dental restoration. The results clearly indicate that the methodology and equipment applied to this work are adequate to proceed a comparative study on thermal compatibility of Ni-Cr alloys and dental porcelains.
{"title":"Restauração metalocerâmica: um estudo comparativo da compatibilidade térmica de ligas Ni-Cr e porcelanas odontológicas","authors":"J. M. D. D. A. Rollo, Sérgio Mazzer Rossitti","doi":"10.1590/S0103-06631999000100013","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100013","url":null,"abstract":"One of the technological applications where a metal-ceramic compatibility is necessary, is the dental restoration build-up, known as metaloceramic. In this case, a porcelain is fused on a metal substructure to have a dental prosthesis. The basic requirement for the success of this dental restoration is the adjustment of the thermal expansion coefficient of each material to achieve a compression stress on the ceramic layer. This study was carried out to obtain the thermal expansion curves for Ni-Cr alloy and dental porcelains to analyze the thermal compatibility between metal-ceramic. Simulating the introduction of a product on the market, an experimental Ni-Cr alloy was developed and compared with another largely commercialized Ni-Cr alloy. By analyzing these data, it was possible to verify the compatibility of each metal-ceramic pair regarding the thermal expansion behavior, using the Yamamotos (1985) methods. In conclusion, the results of the new experimental alloy showed values that can include it as one more option inside the Ni-Cr alloy family used in metaloceramic dental restoration. The results clearly indicate that the methodology and equipment applied to this work are adequate to proceed a comparative study on thermal compatibility of Ni-Cr alloys and dental porcelains.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"128 1","pages":"61-66"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652679","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}
Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100014
M. A. B. Vaz, Altair Antoninha Del Bel Cury, J. Mariolani
The aim of this study was to verify the distribution of masticatory efforts on jaws in overdentures and in a complete conventional denture. Three jaws of photoelastic material were made with double impression modelling technique from a edentulous human jaw. The molds were filled with photoelastic resin PLM-4 (Photolastic Inc., Raleigh, USA). A variation of root dispositions were made on jaws, separating them in three groups; Group I, without roots (control group); Group II, bilateral disposition of roots in the dental arch corresponding to two canines; Group III, one canine and a molar root disposed at the same hemi-arch in an unilateral situation. Conventional complete dentures and overdentures were made over these jaws that ocluded an acrilic cast fixed in a semi-adjustable articulator for the loading aplication (20 N). After "stress freezing", the models were cut off in their median line and analized on a transmission polariscope (Photolastic Inc., Raleigh, USA). Throughout the photoelastic frangent analysis it was concluded that: 1) all the photoelastic models (groups I, II and III) showed different patterns of stress distribution; 2) Group I showed a great concentration of stress all over the residual ridge; 3) Group II was the best in stress distribution when compared with the other groups. The high concentration of stress at the root apex decreased its concentration over all edentulous region of the arch; 4) In Group III a greater effort concentration was observed at the roots apex and also in the edentulous region.
{"title":"Análise fotoelástica da distribuição de tensões produzida na mandíbula pela simulação do esforço mastigatório em sobredentaduras muco-dento-suportadas e prótese total","authors":"M. A. B. Vaz, Altair Antoninha Del Bel Cury, J. Mariolani","doi":"10.1590/S0103-06631999000100014","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100014","url":null,"abstract":"The aim of this study was to verify the distribution of masticatory efforts on jaws in overdentures and in a complete conventional denture. Three jaws of photoelastic material were made with double impression modelling technique from a edentulous human jaw. The molds were filled with photoelastic resin PLM-4 (Photolastic Inc., Raleigh, USA). A variation of root dispositions were made on jaws, separating them in three groups; Group I, without roots (control group); Group II, bilateral disposition of roots in the dental arch corresponding to two canines; Group III, one canine and a molar root disposed at the same hemi-arch in an unilateral situation. Conventional complete dentures and overdentures were made over these jaws that ocluded an acrilic cast fixed in a semi-adjustable articulator for the loading aplication (20 N). After \"stress freezing\", the models were cut off in their median line and analized on a transmission polariscope (Photolastic Inc., Raleigh, USA). Throughout the photoelastic frangent analysis it was concluded that: 1) all the photoelastic models (groups I, II and III) showed different patterns of stress distribution; 2) Group I showed a great concentration of stress all over the residual ridge; 3) Group II was the best in stress distribution when compared with the other groups. The high concentration of stress at the root apex decreased its concentration over all edentulous region of the arch; 4) In Group III a greater effort concentration was observed at the roots apex and also in the edentulous region.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"67-73"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652788","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}
Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100017
Suely Maria Santos Lamarão, Marcelo Bidóia dos Santos, João Humberto Antoniazzi
After instrumentation, the root canal acquires the necessary shape for a perfect adaptation of filling material. During this phase cutting end and LX type an interaction between instrument and root canal is necessary in order to reduce alterations that could occur at this point. This study evaluated the action of two mechanical-rotatory endodontic instruments, Quantec files 2000 serie type SC with blunt end, during the instrumentation of simulated canals curved between 20 and 35 degrees, using quantec graduating tapers. Results showed that the mean curvature alteration of group I canals that were instrumented with SC files, was 2,15%, and for group II instrumented with LX files, was 2,61%. Furthermore group I canals showed lower percentage of curvature alteration. Mann-Whitney tests showed no significant statistical difference at 5% between experimental groups.
{"title":"Modificações da curvatura de canais simulados após emprego de instrumentos rotatórios","authors":"Suely Maria Santos Lamarão, Marcelo Bidóia dos Santos, João Humberto Antoniazzi","doi":"10.1590/S0103-06631999000100017","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100017","url":null,"abstract":"After instrumentation, the root canal acquires the necessary shape for a perfect adaptation of filling material. During this phase cutting end and LX type an interaction between instrument and root canal is necessary in order to reduce alterations that could occur at this point. This study evaluated the action of two mechanical-rotatory endodontic instruments, Quantec files 2000 serie type SC with blunt end, during the instrumentation of simulated canals curved between 20 and 35 degrees, using quantec graduating tapers. Results showed that the mean curvature alteration of group I canals that were instrumented with SC files, was 2,15%, and for group II instrumented with LX files, was 2,61%. Furthermore group I canals showed lower percentage of curvature alteration. Mann-Whitney tests showed no significant statistical difference at 5% between experimental groups.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"89-92"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652928","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}
Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100010
Rosa Fernanda Ignácio, P. E. C. Peres, J. Cury
This investigation evaluated the effect of a fluoride baking soda-containing dentifrice on mutans streptococci counting, acidogenicity and composition of dental plaque. Twenty-three volunteers brushing their teeth 3 times a day, tested 3 formulations of fluoride (1500 ppm F), containing or sodium bicarbonate (12%) associated with calcium carbonate (CARB/BICAR), or calcium carbonate (CARBONATE), or silica (SILICA), in a double blind crossover trial, done in 3 phases of 30 days each. On the 28th day, 8-10 hours after the last brushing, a counting of mutans streptococci in saliva (SMS) was made. On the 30th day (after 48 hours during which the subjects were instructed to rinse with a slurry of toothpaste/water 3 times a day and sucrose 10% 6 times a day), the effect was analyzed in dental plaque, 10-12 hours after the last rinse: a) mutans streptococci (PMS); b) polysaccharide alkali-soluble (ASP); c) acid-soluble F (ASF) and d) pH in T0 (T0), 5 min. after cariogenic challenge (T5), calculating DpH (T0 - T5). The results (mean + SE) according to the treatments with dentifrices SILICA, CARBONATE and CARB/BICAR, were respectively: 1) SMS (x 106 UFC/mL saliva) = 11.43 + 7.62 A; 2,33 + 1.04 A; 2.07 + 1.10 A; 2) PMS (x 106 UFC/mg) = 0.099 + 0.095 A; 0.027 + 0.018 A; 0.007 + 0.003 A; 3) ASP (mg/mg) = 6.89 + 0.62 AC; 8.46 + 0.80 AB; 6.11 + 0.59 C; 4) ASF (mg/g) = 36.67 + 10.10 A; 48.12 + 19.23 A; 52.21 + 15.12 A; 5) T0 = 6.72 + 0.12 A; 6.88 + 0.13 A; 6.65 + 0.11 A; 6) T5 = 5.61 + 0.13 A; 5.71 + 0.13 A; 5.70 + 0.12 A; 7) DpH = 1.12 + 0.11 A; 1.17 + 0.11 A; 0.95 + 0.10 A. Means followed by the same letter do not differ significantly (P < 0.05). The data show that although the baking soda-containing dentifrice demonstrated, collectively, a trend to influence positively the various factors of dental caries, it did not differ significantly from SILICA and CARBONATE dentifrices.
{"title":"Efeito de um dentifrício fluoretado contendo bicarbonato de sódio na contagem de estreptococos do grupo mutans, acidogenicidade e composição da placa dental","authors":"Rosa Fernanda Ignácio, P. E. C. Peres, J. Cury","doi":"10.1590/S0103-06631999000100010","DOIUrl":"https://doi.org/10.1590/S0103-06631999000100010","url":null,"abstract":"This investigation evaluated the effect of a fluoride baking soda-containing dentifrice on mutans streptococci counting, acidogenicity and composition of dental plaque. Twenty-three volunteers brushing their teeth 3 times a day, tested 3 formulations of fluoride (1500 ppm F), containing or sodium bicarbonate (12%) associated with calcium carbonate (CARB/BICAR), or calcium carbonate (CARBONATE), or silica (SILICA), in a double blind crossover trial, done in 3 phases of 30 days each. On the 28th day, 8-10 hours after the last brushing, a counting of mutans streptococci in saliva (SMS) was made. On the 30th day (after 48 hours during which the subjects were instructed to rinse with a slurry of toothpaste/water 3 times a day and sucrose 10% 6 times a day), the effect was analyzed in dental plaque, 10-12 hours after the last rinse: a) mutans streptococci (PMS); b) polysaccharide alkali-soluble (ASP); c) acid-soluble F (ASF) and d) pH in T0 (T0), 5 min. after cariogenic challenge (T5), calculating DpH (T0 - T5). The results (mean + SE) according to the treatments with dentifrices SILICA, CARBONATE and CARB/BICAR, were respectively: 1) SMS (x 106 UFC/mL saliva) = 11.43 + 7.62 A; 2,33 + 1.04 A; 2.07 + 1.10 A; 2) PMS (x 106 UFC/mg) = 0.099 + 0.095 A; 0.027 + 0.018 A; 0.007 + 0.003 A; 3) ASP (mg/mg) = 6.89 + 0.62 AC; 8.46 + 0.80 AB; 6.11 + 0.59 C; 4) ASF (mg/g) = 36.67 + 10.10 A; 48.12 + 19.23 A; 52.21 + 15.12 A; 5) T0 = 6.72 + 0.12 A; 6.88 + 0.13 A; 6.65 + 0.11 A; 6) T5 = 5.61 + 0.13 A; 5.71 + 0.13 A; 5.70 + 0.12 A; 7) DpH = 1.12 + 0.11 A; 1.17 + 0.11 A; 0.95 + 0.10 A. Means followed by the same letter do not differ significantly (P < 0.05). The data show that although the baking soda-containing dentifrice demonstrated, collectively, a trend to influence positively the various factors of dental caries, it did not differ significantly from SILICA and CARBONATE dentifrices.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"13 1","pages":"43-49"},"PeriodicalIF":0.0,"publicationDate":"1999-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652439","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}
Pub Date : 1999-01-01DOI: 10.1590/S0103-06631999000100008
Luciana Lourenço Ribeiro, F. Sá, E. Franco, M. Navarro
The purpose of this study was to evaluate the tensile bond strength of four different adhesive systems. Scotchbond Multi-Purpose Plus, 3M (Group 1), Prime & Bond 2.0, Dentsply (Group 2), ProBOND, Dentsply (Group 3), PAAMA 2, SDI (Group 4) were used with GLACIER (SDI) composite resin. One group without any adhesive was used as control (Group 5). Fifty specimens were divided into 5 groups of 10 each. A stainless steel split matrix with 6.00 mm diameter and 1.00 mm depth was used to obtain two discs of composite resin. The composite resin was applied into one half of the matrix in small portions and light cured for 40 seconds. The adhesives were then applied on the composite resin discs surfaces, following the manufacturers instructions. The second half of the matrix was assembled and the other half was filled with composite resin. After one hour, the matrix was adapted to a special device mounted in a Kratos testing machine to determine the tensile bond strength, at a crosshead speed of 0.5 mm/min. The results, expressed in KgF, were obtained: Group 1 (3.99 ± l.73), Group 2 (4.24 ± 1.91), Group 3 (3.84 ± 1.59), Group 4 (4.33 ± 1.82) and Group 5 (4.16 ± 1.79). Data were analyzed by one-way ANOVA. There were no statistical differences (p < 0.05) in bond strength between groups. Based on the results of this study, it can be concluded that there was no influence of the different adhesives in the bond strength to a composite resin.
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