Pub Date : 1998-10-01DOI: 10.1590/S0103-06631998000400009
M. C. Valera, Mário Roberto Leonardo, I. B. Filho
The aim of this study was to verify the apical sealing of root canals obturated with Sealapex, Apexit, Sealer 26, and Ketac Endo cements. A hundred and thirty six dental roots were used for the experiment. After biomechanical preparation and lateral condensation filling, half of the roots were placed in human blood plasma storage medium for 6 months. The remaining samples were immediately placed in methylene blue, under a temporary vacuum, and after one week the amount of dye penetration measured. The stored samples were similarly treated after the 6-month storage period. Statistical analysis of the results revealed that the groups obturated with Sealapex and Sealer 26 showed the smallest amount of apical leakage (p < 0.05). There were significant differences in the amount of dye penetration after 6 months of storage (1.275 mm), when compared to the results found without storage (0.829 mm) (p < 0.05).
{"title":"Cimentos endodônticos - selamento marginal apical imediato e após armazenamento de seis meses","authors":"M. C. Valera, Mário Roberto Leonardo, I. B. Filho","doi":"10.1590/S0103-06631998000400009","DOIUrl":"https://doi.org/10.1590/S0103-06631998000400009","url":null,"abstract":"The aim of this study was to verify the apical sealing of root canals obturated with Sealapex, Apexit, Sealer 26, and Ketac Endo cements. A hundred and thirty six dental roots were used for the experiment. After biomechanical preparation and lateral condensation filling, half of the roots were placed in human blood plasma storage medium for 6 months. The remaining samples were immediately placed in methylene blue, under a temporary vacuum, and after one week the amount of dye penetration measured. The stored samples were similarly treated after the 6-month storage period. Statistical analysis of the results revealed that the groups obturated with Sealapex and Sealer 26 showed the smallest amount of apical leakage (p < 0.05). There were significant differences in the amount of dye penetration after 6 months of storage (1.275 mm), when compared to the results found without storage (0.829 mm) (p < 0.05).","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"12 1","pages":"355-360"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652275","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 : 1998-10-01DOI: 10.1590/S0103-06631998000400015
G. Vieira, Ismael Antônio Freire, Carlos Martins Agra, Jane Cleide Goveia, Edmir Matson
The authors have studied five different visible light-curing devices to verify the irradiance they are able to emit. Using optical instruments like a spectrophotometer and a monochromator, the authors have analyzed the transmittance of the filters, the characteristics of the light radiation source (lamp) and the performance of the ends. They have concluded that the visible light-curing devices analyzed emitted energy in a proper wavelenght, that is, between 350 and 530 nm, with the highest concentration in the range of 430 to 470 nm.
{"title":"Análise da irradiação de diversos aparelhos fotopolimerizadores","authors":"G. Vieira, Ismael Antônio Freire, Carlos Martins Agra, Jane Cleide Goveia, Edmir Matson","doi":"10.1590/S0103-06631998000400015","DOIUrl":"https://doi.org/10.1590/S0103-06631998000400015","url":null,"abstract":"The authors have studied five different visible light-curing devices to verify the irradiance they are able to emit. Using optical instruments like a spectrophotometer and a monochromator, the authors have analyzed the transmittance of the filters, the characteristics of the light radiation source (lamp) and the performance of the ends. They have concluded that the visible light-curing devices analyzed emitted energy in a proper wavelenght, that is, between 350 and 530 nm, with the highest concentration in the range of 430 to 470 nm.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"12 1","pages":"395-399"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652164","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 : 1998-10-01DOI: 10.1590/S0103-06631998000400013
Lauro Cardoso Villela, M. Fava, M. C. Vieira, P. M. Hayashi, S. I. Myaki
The clinical performance of two dental materials used as pit and fissure sealants (Fluroshield and Vitremer) was evaluated. Forty-six sound upper or lower premolars were sealed. Twenty-three teeth were sealed with Vitremer and 23 with Fluroshield. After six, twelve, and twenty-four months Vitremer presented a total retention of 91.30%, 91.30%, and 82.60%, and Fluroshield presented a total retention of 100% in the three periods of evaluation. Both materials do not permit the development of caries, independent of their retention and period of evaluation.
{"title":"Avaliação clínica de vinte e quatro meses do Fluroshield e do Vitremer utilizados como selante de fossas e fissuras","authors":"Lauro Cardoso Villela, M. Fava, M. C. Vieira, P. M. Hayashi, S. I. Myaki","doi":"10.1590/S0103-06631998000400013","DOIUrl":"https://doi.org/10.1590/S0103-06631998000400013","url":null,"abstract":"The clinical performance of two dental materials used as pit and fissure sealants (Fluroshield and Vitremer) was evaluated. Forty-six sound upper or lower premolars were sealed. Twenty-three teeth were sealed with Vitremer and 23 with Fluroshield. After six, twelve, and twenty-four months Vitremer presented a total retention of 91.30%, 91.30%, and 82.60%, and Fluroshield presented a total retention of 100% in the three periods of evaluation. Both materials do not permit the development of caries, independent of their retention and period of evaluation.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"33 1","pages":"383-387"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652524","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 : 1998-10-01DOI: 10.1590/S0103-06631998000400005
P. Frazão
The role and participation of dental auxiliary personnel in oral health promotion activities in state public health programs have not been documented. The purpose of this study was to assess the participation of dental auxiliary personnel in five towns situated in Sao Paulo, Brazil. In 1994, a questionnaire was applied to all workers in public health dentistry positions, requesting information from 245 (75.4%) dental assistants and dental hygienists employed in oral health programs of these towns. The results showed that their participation in oral health promotion activities varies according to each town reality. In some local health systems, their working time are spent more in oral health promotion activities than dental clinic activities. The oral health promotion activities more often refer fluoride mouthrinse, dental plaque staining followed by supervised brushing and education activities carrying out in schools and health centers. The survey results indicated that the participation of dental auxiliary personnel in some towns is very important and contribute to improve public health dentistry practices directed to the oral health promotion.
{"title":"A participação do pessoal auxiliar odontológico na promoção da saúde bucal","authors":"P. Frazão","doi":"10.1590/S0103-06631998000400005","DOIUrl":"https://doi.org/10.1590/S0103-06631998000400005","url":null,"abstract":"The role and participation of dental auxiliary personnel in oral health promotion activities in state public health programs have not been documented. The purpose of this study was to assess the participation of dental auxiliary personnel in five towns situated in Sao Paulo, Brazil. In 1994, a questionnaire was applied to all workers in public health dentistry positions, requesting information from 245 (75.4%) dental assistants and dental hygienists employed in oral health programs of these towns. The results showed that their participation in oral health promotion activities varies according to each town reality. In some local health systems, their working time are spent more in oral health promotion activities than dental clinic activities. The oral health promotion activities more often refer fluoride mouthrinse, dental plaque staining followed by supervised brushing and education activities carrying out in schools and health centers. The survey results indicated that the participation of dental auxiliary personnel in some towns is very important and contribute to improve public health dentistry practices directed to the oral health promotion.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"12 1","pages":"329-336"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67651976","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 : 1998-10-01DOI: 10.1590/S0103-06631998000400014
Z. M. Mussolino, M. C. Borsatto, M. L. Turbino
Standardized cylinders of sealants were bonded to the flattened labial enamel of bovine incisor teeth that had previously been subjected to 37% phosphoric acid gel for 30 seconds. A total of 40 teeth were tested, randomly divided in four groups of 10 teeth each. In Group I, the sealant Fluroshield was applied after etching; in Group II after etching, the "primer" of Probond was used before the sealant; in Group III after etching, the bond of Probond was used after the "primer"; and in Group IV only the bond was applied before the sealant. Specimens were stored in water at 37°C during 36 hours, before shear testing using a Universal Testing Machine. There was significant reduction in shear bond strength of the sealant when only the "primer" was used previously to the application of the sealant. There were no significant differences in the shear bond strength of the sealant when the Probond Adhesive System was applied with or without "primer". The shear bond strength of enamel sealant was higher in the incisal third than in the cervical third.
{"title":"Resistência ao cisalhamento de um selante associado a componentes de um sistema adesivo dental","authors":"Z. M. Mussolino, M. C. Borsatto, M. L. Turbino","doi":"10.1590/S0103-06631998000400014","DOIUrl":"https://doi.org/10.1590/S0103-06631998000400014","url":null,"abstract":"Standardized cylinders of sealants were bonded to the flattened labial enamel of bovine incisor teeth that had previously been subjected to 37% phosphoric acid gel for 30 seconds. A total of 40 teeth were tested, randomly divided in four groups of 10 teeth each. In Group I, the sealant Fluroshield was applied after etching; in Group II after etching, the \"primer\" of Probond was used before the sealant; in Group III after etching, the bond of Probond was used after the \"primer\"; and in Group IV only the bond was applied before the sealant. Specimens were stored in water at 37°C during 36 hours, before shear testing using a Universal Testing Machine. There was significant reduction in shear bond strength of the sealant when only the \"primer\" was used previously to the application of the sealant. There were no significant differences in the shear bond strength of the sealant when the Probond Adhesive System was applied with or without \"primer\". The shear bond strength of enamel sealant was higher in the incisal third than in the cervical third.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"12 1","pages":"389-394"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652077","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 : 1998-10-01DOI: 10.1590/S0103-06631998000400012
F. F. Demarco, Sandra Beatriz Chaves Tarquinio, Márcia Martins Marques Jaeger, Edmir Matson
The purpose of the present study was to evaluate the cytotoxicity of two different dentin-bonding agents on cell cultures. NIH-3T3 fibroblasts were plated in Petri dishes. After 48 hours, when the cells were in confluence, "primers" and adhesives of two dentin bonding systems (Scotchbond Multipurpose Plus and Clearfil Liner Bond 2) were applied on glass slides, which were placed in the dishes. Composite resin and calcium hydroxide were also used. Polymerization, when required, was performed with a XL 1500 light unit. No material was used in the control group. All materials remained in contact with the cells for 24 hours, except for phosphoric acid, which was maintained for 20 seconds. After that, cells were counted in a hemocytometer and cell viability was obtained by tripan blue dye exclusion. The data were submitted to statistical analysis (ANOVA and Tukey's test). It was possible to conclude that all materials tested presented lower cell viability than the control group, except calcium hydroxide. Composite resin and phosphoric acid application caused similar viability rates as calcium hydroxide. "Primers" plus adhesive application of both adhesive systems produced similar cytotoxicicity, both causing smaller cell viability than that of calcium hydroxide group. No differences were found in relation to the cytotoxic effects of the components in both adhesive systems.
本研究的目的是评估两种不同的牙本质结合剂对细胞培养的细胞毒性。NIH-3T3成纤维细胞在培养皿中培养。48小时后，当细胞融合时，将两种牙本质粘合系统(Scotchbond Multipurpose Plus和Clearfil Liner Bond 2)的“引物”和粘合剂涂在玻璃片上，玻璃片放置在培养皿中。还采用了复合树脂和氢氧化钙。聚合，当需要时，用XL 1500光单元进行。对照组不使用任何材料。除磷酸外，所有材料与细胞保持24小时接触，磷酸保持20秒。然后用血细胞计计数细胞，用三番蓝染色法测定细胞活力。数据进行统计学分析(方差分析和Tukey检验)。可以得出结论，除氢氧化钙外，所有被测材料的细胞活力都低于对照组。复合树脂和磷酸的应用产生了与氢氧化钙相似的存活率。两种粘附体系的“引物”加粘合剂应用产生相似的细胞毒性，都比氢氧化钙基团引起的细胞活力小。在两种黏附系统中，没有发现与细胞毒性作用有关的差异。
{"title":"Avaliação da citotoxicidade de dois sistemas adesivos","authors":"F. F. Demarco, Sandra Beatriz Chaves Tarquinio, Márcia Martins Marques Jaeger, Edmir Matson","doi":"10.1590/S0103-06631998000400012","DOIUrl":"https://doi.org/10.1590/S0103-06631998000400012","url":null,"abstract":"The purpose of the present study was to evaluate the cytotoxicity of two different dentin-bonding agents on cell cultures. NIH-3T3 fibroblasts were plated in Petri dishes. After 48 hours, when the cells were in confluence, \"primers\" and adhesives of two dentin bonding systems (Scotchbond Multipurpose Plus and Clearfil Liner Bond 2) were applied on glass slides, which were placed in the dishes. Composite resin and calcium hydroxide were also used. Polymerization, when required, was performed with a XL 1500 light unit. No material was used in the control group. All materials remained in contact with the cells for 24 hours, except for phosphoric acid, which was maintained for 20 seconds. After that, cells were counted in a hemocytometer and cell viability was obtained by tripan blue dye exclusion. The data were submitted to statistical analysis (ANOVA and Tukey's test). It was possible to conclude that all materials tested presented lower cell viability than the control group, except calcium hydroxide. Composite resin and phosphoric acid application caused similar viability rates as calcium hydroxide. \"Primers\" plus adhesive application of both adhesive systems produced similar cytotoxicicity, both causing smaller cell viability than that of calcium hydroxide group. No differences were found in relation to the cytotoxic effects of the components in both adhesive systems.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"12 1","pages":"375-382"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652508","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 : 1998-10-01DOI: 10.1590/S0103-06631998000400008
R. F. Gerlach, José Eduardo Tanus dos Santos, C. A. Escobar
Foi realizado um levantamento de dados atraves de questionario entre 150 alunos que estavam no ultimo ano do Curso de Odontologia de quatro faculdades para delinear a sua atual opiniao quanto ao uso de solucoes anestesicas contendo epinefrina em pacientes cardiopatas. Os alunos tinham duas opcoes: "contra-indicado" ou "nao contra-indicado", e deveriam escolher uma delas para os oito casos de pacientes com doencas cardiacas estaveis e instaveis, entre as quais doenca cardiaca isquemica, arritmia e hipertensao. Encontraram-se, em media, 77% de acertos quando analisadas as respostas de todos os alunos. Os erros foram mais frequentes quando as perguntas diziam respeito a doenca cardiaca isquemica (68% de respostas corretas). Embora os vasoconstritores possam oferecer muitas vantagens e nao sejam contra-indicados para a maioria dos pacientes cardiopatas, os alunos muitas vezes nao observam as determinacoes atuais para o uso apropriado desses medicamentos nesses pacientes.
{"title":"O uso de soluções anestésicas em pacientes cardiopatas: levantamento entre estudantes de Odontologia","authors":"R. F. Gerlach, José Eduardo Tanus dos Santos, C. A. Escobar","doi":"10.1590/S0103-06631998000400008","DOIUrl":"https://doi.org/10.1590/S0103-06631998000400008","url":null,"abstract":"Foi realizado um levantamento de dados atraves de questionario entre 150 alunos que estavam no ultimo ano do Curso de Odontologia de quatro faculdades para delinear a sua atual opiniao quanto ao uso de solucoes anestesicas contendo epinefrina em pacientes cardiopatas. Os alunos tinham duas opcoes: \"contra-indicado\" ou \"nao contra-indicado\", e deveriam escolher uma delas para os oito casos de pacientes com doencas cardiacas estaveis e instaveis, entre as quais doenca cardiaca isquemica, arritmia e hipertensao. Encontraram-se, em media, 77% de acertos quando analisadas as respostas de todos os alunos. Os erros foram mais frequentes quando as perguntas diziam respeito a doenca cardiaca isquemica (68% de respostas corretas). Embora os vasoconstritores possam oferecer muitas vantagens e nao sejam contra-indicados para a maioria dos pacientes cardiopatas, os alunos muitas vezes nao observam as determinacoes atuais para o uso apropriado desses medicamentos nesses pacientes.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"12 1","pages":"349-353"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67651923","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 : 1998-10-01DOI: 10.1590/S0103-06631998000400016
Eduardo Pizza Pellizzer, A. Muench
The purpose of this study was to determine the biting forces of individuals wearing classes I, II or III partially removable mandibular dentures. Upper jaws presented fixed bridges, classes I, II or III partially removable dentures, or complete dentures. Measurements of biting forces were obtained by a gnathodynamometer. The conclusions were: classes I and II presented low biting forces, specially far from the last abutment tooth; when the opposite arcade was a complete denture, biting forces were low; males presented higher biting forces than females; natural molars and bicuspids presented higher biting forces with class III than with classes I or II.
{"title":"Forças de mordida relacionadas a próteses parciais removíveis inferiores","authors":"Eduardo Pizza Pellizzer, A. Muench","doi":"10.1590/S0103-06631998000400016","DOIUrl":"https://doi.org/10.1590/S0103-06631998000400016","url":null,"abstract":"The purpose of this study was to determine the biting forces of individuals wearing classes I, II or III partially removable mandibular dentures. Upper jaws presented fixed bridges, classes I, II or III partially removable dentures, or complete dentures. Measurements of biting forces were obtained by a gnathodynamometer. The conclusions were: classes I and II presented low biting forces, specially far from the last abutment tooth; when the opposite arcade was a complete denture, biting forces were low; males presented higher biting forces than females; natural molars and bicuspids presented higher biting forces with class III than with classes I or II.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"12 1","pages":"401-407"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652232","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 : 1998-07-01DOI: 10.1590/S0103-06631998000300014
H. Panzeri, Mário Bocalini, Fernanda de Carvalho Panzeri, J. T. Moraes, J. Filho, M. A. Vieira
The use of new materials, particularly metal alloys, has been a constant trend in Dentistry. The industrial need to develop products with greater resistance to corrosion has benefited prosthodontics with a large number of excellent metallic alloys. In order to adapt such alloys to dental restorations or devices, refractory materials ought to be developed. That is the aim of using slurry as a mold in the casting process, which also makes it possible to obtain surfaces with improved finish.
{"title":"Emprego de uma lama com caráter refratário para o processo de fundição odontológica","authors":"H. Panzeri, Mário Bocalini, Fernanda de Carvalho Panzeri, J. T. Moraes, J. Filho, M. A. Vieira","doi":"10.1590/S0103-06631998000300014","DOIUrl":"https://doi.org/10.1590/S0103-06631998000300014","url":null,"abstract":"The use of new materials, particularly metal alloys, has been a constant trend in Dentistry. The industrial need to develop products with greater resistance to corrosion has benefited prosthodontics with a large number of excellent metallic alloys. In order to adapt such alloys to dental restorations or devices, refractory materials ought to be developed. That is the aim of using slurry as a mold in the casting process, which also makes it possible to obtain surfaces with improved finish.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"12 1","pages":"271-279"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67652006","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 : 1998-07-01DOI: 10.1590/S0103-06631998000300009
Augusto César Cropanese Spadaro, Thais Henriques Caldeira, Cláudia Bueno Rocha, A. Polizello, W. Mestriner
The present study aimed to develop and standardize a colorimetric method for assessing salivary buffer capacity adapted to the features of the Brazilian population. Samples of stimulated saliva were titrated without CO2 elimination. The assessment was carried out to study the influence of the loss of CO2 from the samples during the few minutes necessary for titration, and to standardize the instants for measuring pH. Saliva samples were titrated from 206 individuals from both genders, between 5 and 50 years of age, and in a proportion of 0.77 : 1 : 0.44, respectively of children, youngsters, and adults. Case frequency distribution; determination of average values of initial pH, pKa, µ equivalents related to titration end point and final pH; and estimate of the percentage of saliva titrated at a pH of 5.0 were calculated based on the data collected. The results were used to classify individuals according to their salivary buffer capacity by colorimetric pH determinations using 11,12, and 13 µ equivalents of H+/ml saliva, and were compared to case frequency distribution obtained from saliva titration data. The results indicate that 11 µ equivalents H+/ml of saliva is the most appropriate for clinically evaluating the salivary buffer capacity of our population.
{"title":"Método para avaliação clínica da capacidade tamponante salivar","authors":"Augusto César Cropanese Spadaro, Thais Henriques Caldeira, Cláudia Bueno Rocha, A. Polizello, W. Mestriner","doi":"10.1590/S0103-06631998000300009","DOIUrl":"https://doi.org/10.1590/S0103-06631998000300009","url":null,"abstract":"The present study aimed to develop and standardize a colorimetric method for assessing salivary buffer capacity adapted to the features of the Brazilian population. Samples of stimulated saliva were titrated without CO2 elimination. The assessment was carried out to study the influence of the loss of CO2 from the samples during the few minutes necessary for titration, and to standardize the instants for measuring pH. Saliva samples were titrated from 206 individuals from both genders, between 5 and 50 years of age, and in a proportion of 0.77 : 1 : 0.44, respectively of children, youngsters, and adults. Case frequency distribution; determination of average values of initial pH, pKa, µ equivalents related to titration end point and final pH; and estimate of the percentage of saliva titrated at a pH of 5.0 were calculated based on the data collected. The results were used to classify individuals according to their salivary buffer capacity by colorimetric pH determinations using 11,12, and 13 µ equivalents of H+/ml saliva, and were compared to case frequency distribution obtained from saliva titration data. The results indicate that 11 µ equivalents H+/ml of saliva is the most appropriate for clinically evaluating the salivary buffer capacity of our population.","PeriodicalId":77611,"journal":{"name":"Revista de odontologia da Universidade de Sao Paulo","volume":"42 1","pages":"247-251"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67651417","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}
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