Recuperação da difusão fonetica em individuos desdentados com emprego de proteses totais duplas confeccionadas com base na tecnica da zona neutra

Orientador: Moustafa Mohamed El-GuindyDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaResumo: Embora o estudo da fala relacionada aos pacientes desdentados e reabilitados com Prótese Total Dupla possua vários trabalhos publicados, ainda não é considerado com a devida importância que merece, tanto em seu aspecto fisiológico como social e emocional. Utilizando Espectrografia foi analisada a intensidade dos sons da consoante "S" e das vogais "A", "E", "I" e "O" em 5 indivíduos brasileiros, do sexo masculino, com faixa etária de 40 a 76 anos, que nunca se utilizaram de prótese dental e que procuraram a Clinica de Prótese Total da Faculdade de Odontologia da Pontifícia Universidade Católica de Campinas, para confeccionar dentaduras duplas. Trés espectrogramas foram feitos para cada indivíduo: um antes da instalação das dentaduras, outro 30 dias após o uso das mesmas e outro imediatamente após a remoção destas próteses. Aplicou-se aos dados obtidos análise estatistica de média das diferenças, desvio padrão e variância. A significância foi testada por meio do teste t. Como resultado obtldo da amostra estudada, determinamos que os valores de intensidade de som, na situação desdentado, reabilitado ou quando a prótese é removida, apresentam alterações estatisticamente signlficantes, agindo diretamente na qualidade da falaAbstract: Although several studies have been published about toothless patients rehabilitated with Double Total Prosthesis, this subject has not yet been fully considered as to its physiological, social or emotional aspects. By means of Spectrography, the intensity of sound of the consonant "5" and of the vowels "A", "E", " I" , and "O" was analyzed in five Brazilian male individuals, ages ranging from 40 to 76, who had never made use of dental prosthesis before and who had sought the Total Prosthesis Clinic of the Odontology College at Pontificia Universidade Católica de Campinas to have double dentures made. Three spectrograms were made for each individual: one before the dentures were set, one after 30 days of their use, and another immediately after their removal. A statistic analysis of differences average, standard deviation and variation was applied to the data obtained. Significancy was tested through Teste t. From the studied sample we found that the values concernlng sound intensity in the three different conditions toothless, rehabilitated and after prosthesis removal - show statlstically significant alterations, directly interfering with the quality of speechMestradoFisiologia e Biofisica do Sistema EstomatognaticoMestre em Ciência

Antimicrobial capacity of Aloe vera and propolis dentifrice against Streptococcus mutans strains in toothbrushes: an in vitro study

OBJECTIVES: This study evaluated in vitro the efficiency of Aloe vera and propolis dentifrice on reducing the contamination of toothbrush bristles by a standard strain of Streptococcus mutans (ATCC 25175; SM), after toothbrushing. MATERIAL AND METHODS: Fifteen sterile toothbrushes were randomly divided into 5 toothbrushing groups: I (negative control): without dentifrice; II: with fluoridated dentifrice; III: with triclosan and gantrez dentifrice; IV (positive control): without dentifrice and irrigation with 10 mL of 0.12% chlorhexidine gluconate; V: with Aloe vera and propolis dentifrice. In each group, 1 sterile bovine tooth was brushed for 1 min, where the toothbrush bristles were contaminated with 25 µL of SM. After toothbrushing, the bristles were stored in individual test tubes with 3 mL of BHI under anaerobiosis of 37°C for 48 h. Then, they were seeded with sterile swab in triplicate in the Mitis salivarius - Bacitracin culture medium. The samples were kept under anaerobiosis of 37°C for 48 h. Scores were used to count the number of colony forming units (cfu). The results were submitted to the Mann-Whitney statistical test at 5% significance level. RESULTS: There was statistically significant difference (

Restabelecimento do plano oclusal e da dimensão vertical de oclusão em dentaduras duplas confeccionadas com base na tecnica de zona neutra e sua avaliação frente aos padrões cefalometricos

Orientador: Frederico Andrade e SilvaTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaResumo: O presente trabalho objetiva verificar a validade de algumas referências anatômicas para determinar a altura do plano oclusal, quando da confecção de uma prótese total dupla, utilizando-se a técnica da zona neutra ou do equilíbrio muscular. Também foi avaliada a associação dos métodos de deglutição, métrico, estético e fonético para se determinar a dimensão vertical de oclusão. Para os 42 indivíduos que receberam as dentaduras duplas e as utilizaram por 15 dias para adaptação, foi feita uma telerradiografia em norma lateral com as superfícies oclusais e bordas incisais dos dentes inferiores previamente assinaladas com substância radiopaca. Foi executado um traçado cefalométrico em desdentados e os resultados comparados com os parâmetros universalmente aceitos como normais de padrões cefalométricos, usando-se, principalmente, a Análise de Ricketts apenas nos aspectos que interessavam, complementada por outros referenciais de pesquisa. Os resultados obtidos após a avaliação estatística permitiram concluir que: 1- A altura do lábio inferior em repouso, o maior diâmetro da língua, a ponta da língua, a metade da papila retromolar e o relativo paralelismo entre o rebordo alveolar superior e inferior são referências seguras para se determinar a altura do plano oclusal em próteses totais duplas, confeccionadas com base na técnica de zona neutra ou equilíbrio muscular quando comparado aos padrões de cefalometria. 2- A associação dos métodos de deglutição, métrico, fonético e estético para determinar a dimensão vertical de oclusão em indivíduos desdentados que receberam prótese total dupla também se mostrou eficiente quando comparada aos padrões cefalométricos. 3- Como mais uma referência para determinar a dimensão vertical de oclusão em pacientes que receberão uma prótese total dupla, pode-se utilizar as fórmulas: proporção espinha nasal anteriorAbstract: This dissertation aims at checking the validity of some anatomical references used to determine the height of the occlusal plane when manufacturing complete dentures based on the neutral zone or muscular balance technique. The association of the deglutition, metric, esthetic and phonetic methods was also evaluated to determine the occlusal vertical dimension. The 42 individuais who received double dentures and used them for 15 days for adaptation had a teleradiography taken at lateral norm, with the occlusal surfaces and incisal edges of the lower teeth previously marked with a radio-opaque substance. A cephalometric outline within the toothless individuals' limitations was done, and the results were compared to the parameters universally accepted as normal cephalometric standards. The Ricketts Analysis was mainly used to compare results, but only when it suited our purposes, and it was complemented by other research references: The results obtained after statistical evaluation show: 1- When compared to cephalometric standards, the height of the lower lip at rest, the largest diameter of the tongue, the tip of the tongue, half the retromolar pad and the relative parallelism between the upper and lower alveolar rim are sure references to determine the height of the occlusal plane when manufacturing double total prosthesis based on the neutral zone or muscular balance technique. 2- The association of deglutition, metric, esthetic and phonetic methods to determine the occlusal vertical dimension in edentulous individuais receiving double complete dentures has also proved efficient when compared to cephalometric standards. 3- The formulas below can be used as another reference to determine occlusal vertical dimension in patients receiving a complete dentures: ratio anterior nasal spine I mentum = 1.3 ratio nasion I anterior nasal spine or ratio nose basis I mentum = 1.19 ratio eye external corner I buccal commissureDoutoradoProtese DentalDoutor em Clínica Odontológic

Antimicrobial capacity of Aloe vera and propolis dentifrice against Streptococcus mutans strains in toothbrushes: an in vitro study

OBJECTIVES: This study evaluated in vitro the efficiency of Aloe vera and propolis dentifrice on reducing the contamination of toothbrush bristles by a standard strain of Streptococcus mutans (ATCC 25175; SM), after toothbrushing. MATERIAL AND METHODS: Fifteen sterile toothbrushes were randomly divided into 5 toothbrushing groups: I (negative control): without dentifrice; II: with fluoridated dentifrice; III: with triclosan and gantrez dentifrice; IV (positive control): without dentifrice and irrigation with 10 mL of 0.12% chlorhexidine gluconate; V: with Aloe vera and propolis dentifrice. In each group, 1 sterile bovine tooth was brushed for 1 min, where the toothbrush bristles were contaminated with 25 µL of SM. After toothbrushing, the bristles were stored in individual test tubes with 3 mL of BHI under anaerobiosis of 37°C for 48 h. Then, they were seeded with sterile swab in triplicate in the Mitis salivarius - Bacitracin culture medium. The samples were kept under anaerobiosis of 37°C for 48 h. Scores were used to count the number of colony forming units (cfu). The results were submitted to the Mann-Whitney statistical test at 5% significance level. RESULTS: There was statistically significant difference (p<0.05) for the reduction of bristle contamination comparing groups II, III, IV and V to group I. CONCLUSIONS: It may be stated that after toothbrushing, the Aloe vera and propolis dentifrice reduced the contamination of toothbrush bristles by SM, without differentiation from the other chemical agents used