Thesis (Ph. D.)--University of Michigan, 1979. / Includes bibliographical references (leaves 298-309).

Proefschrift--Rijsuniversiteit te Groningen, 1979. / Thesis statement on title page in Dutch. Summary in Dutch. Bibliography: p. 126-146.

The importance of oral hygiene in the life of each person is irreplaceable and correct performance of oral hygiene has its significance in socio-economic position of each person. I set the goal of assessing the level of oral hygiene in a group of patients from the town of České Budějovice and surroundings in my work. I selected the quantitative research method with the help of questionnaires as the working method of my research work. The goal of my thesis was to assess the level of oral hygiene and also to assess the patients{\crq} approaches to this issue in relationship to their achieved level of education. I confirmed with my investigation that the level of education has influence on performance of oral hygiene; it has further influence on the awareness of the citizens with regard to the attitude to their oral health and on the assessment of their oral health in relationship to their current job and further on the relationship of oral hygiene and the level of life style and position in the society.

Objetivo: o objetivo deste estudo foi avaliar as condições de saúde bucal e a ocorrência de anomalias dentárias em crianças tratadas para leucemia linfoblástica aguda (LLA) no Serviço de Oncologia Pediátrica (SOP) do Hospital de Clínicas de Porto Alegre (HCPA), comparadas com um grupo crianças saudáveis. Amostra: foram selecionadas 56 crianças com diagnóstico de LLA e analisadas as presenças de anomalias dentárias e os índices CPO-D (cariado, perdido, obturado-dente), IPV (índice de placa visível), ISG (índice de sangramento gengival) e fluxo salivar. As crianças tratadas apresentaram uma média de idade, na época do diagnóstico da LLA, de 5,3 ± 2,6, e 11,8 ± 4,2 na avaliação, sendo 32 masculinos e 24 femininos. Os pacientes tratados para LLA foram divididos em três grupos: crianças tratadas somente com quimioterapia, com quimio e radioterapia, e com quimio, radio e transplante de medula óssea. Resultados: os resultados revelaram 80,4% de anomalias dentárias nas crianças tratadas, ou seja, 45 destas apresentaram pelo menos uma alteração, e o grupo de pacientes tratados com quimio, radio e submetidos ao transplante de medula óssea foi o que revelou a maior média de anormalidades dentárias por indivíduo (15,37 ± 15,03), não ocorrendo diferença estatística entre os gêneros. As crianças tratadas para LLA obtiveram CPO-D de 1,9 ± 4,0, ISG de 26,5%, IPV de 72,0%, e índice de fluxo salivar médio de 0,19 mL/min criança. Já o grupo de crianças sadias apresentou CPO-D de 1,52 ± 3,5, ISG de 11,1%, IPV de 53,8% e índice de fluxo salivar médio de 0,27 mL/min. Conclusão: o tratamento para a cura da LLA provoca um aumento significativo no número de anomalias dentárias, sendo mais freqüente nos pacientes menores de cinco anos de idade, principalmente nos pacientes submetidos a quimio e radioterapia associadas ao transplante de medula óssea, o que requer, por parte do cirurgião-dentista, intervenções clínicas diferenciadas e cuidadosas nestes pacientes, tendo-se em vista também os índices aumentados de ISG e IPV. As alterações sofridas pelas glândulas salivares durante o tratamento não são permanentes sob o aspecto do fluxo salivar, que retorna à normalidade. A orientação e o acompanhamento adequados destes pacientes por parte da equipe de saúde bucal podem mantê-los com o índice de CPO-D dentro dos padrões preconizados pela Organização Mundial de Saúde. / Objective: the objective of this research was to evaluate oral health conditions and the occurrence of dental anomalies in children treated for acute lymphoblastic leukemia (ALL) in the Pediatric Oncology Service at Hospital de Clínicas de Porto Alegre (HCPA), in comparison to a healthy children group. Sample: 56 children diagnosed with ALL were selected and the occurrence of dental anomalies and the rates DMF-T (decayed, missing, filled-tooth), RVDP (rate of visible dental plaque), RGB (rate of gingival bleeding) and salivary flow were analyzed. The treated children at the time of the diagnostic for ALL were in the average age of 5,3 ± 2,6, and 11,8 ± 4,2 at the evaluation, with 32 male and 24 female. The patients treated for ALL were divided in three groups: children only treated with chemotherapy, with chemotherapy and radiotherapy, and with chemotherapy, radiotherapy and bone marrow transplant. Results: the results showed 80,4% of dental anomalies in treated children, it means that 45 children had at least one disorder, and the group of patients treated with chemotherapy, radiotherapy and who underwent a bone marrow transplant showed the highest average of dental anomalies per person (15,37 ± 15,03), with no statistic difference concerning gender. The children treated for ALL had DMF-T of 1,9 ± 4,0, RGB of 26,5%, RVDP of 72,0%, and average salivary flow of 0,19 mL/min child. But the healthy children group showed DMF-T of 1,52 ± 3,5, RGB of 11,1%, RVDP of 53,8% and average salivary flow of 0,27 mL/min. Conclusion: the treatment to cure ALL causes a significant increasing in the cases of dental anomalies, mainly in patients under chemotherapy and radiotherapy associated to bone marrow transplant, what requires from the oral surgeon, careful and specific clinical interventions, also considering the increased rates of RGB and RVDP. The disorders in the salivary glands during the treatment are not permanent in what concerns the salivary flow, that becomes normal again. The adequate orientation and care of these patients by the oral health team can keep their DMF-T rates in the patterns ruled by the World Health Organization.

The main objective of this diploma thesis is to describe an awareness and level of oral hygiene of children of Romany ethnic group and subsequently optimize the care of oral cavity leading to the reduction in frequency of hanging apparatus illnesses. The other target of this thesis is a preparation of educational program that would motivate children to correct and regular dental hygiene. The thesis deals with history and characteristic of Romany ethnic group, issues of Romany children and low-threshold centre for children and youth in Český Krumlov. It also informs on periodontal diseases of oral cavity, tooth decay pathogenesis and subsequent prevention and therapy of tooth decay. The practical part is focused on awareness of Romany children of oral hygiene using a questionnaire method. Five main hypothesises were defined and subsequently verified by qualitative method, specifically by anonymous questionnaire investigation done at three subjects. Following the questionnaires evaluation, which was done by Microsoft Excel graphs, a verification of the defined hypothesises was done using a chi-test. An educational program developed for my bachelor thesis was also used in this part. The educational program was subsequently extended and training was done. Further to the education, the dental hygiene awareness of Romany children was improved by 27 %. The thesis is a theoretical instruction for practical mastering of oral cavity care and dental hygiene for each individual how tries to improve his dental health.

Made available in DSpace on 2014-06-11T19:33:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-08-21Bitstream added on 2014-06-13T21:05:40Z : No. of bitstreams: 1 takahashi_k_dr_araca.pdf: 943873 bytes, checksum: 127f2cdb210faeb29eb4458267958eb5 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo do presente estudo foi avaliar a microbiota bucal de mães, e pares de crianças, atendidas no programa educativo-preventivo da Bebê Clínica da Faculdade de Odontologia de Araçatuba-UNESP, nas faixas etárias de 6, 12, 18 e 24 meses, relacionando-a com a dieta, higiene bucal, presença ou não de dentes, prevalência de cárie e condição gengival. Após exame clínico e levantamento da dieta alimentar das crianças, foi realizada coleta dos espécimes de saliva, biofilme nas faixas etárias determinadas, que foram transferidos para frascos contendo meio de transporte VMGA III, submetidos a diluições seriadas em VMGA I, seguido de inoculação em meios de cultura adequados e incubação em diferentes condições redox e períodos de tempo. Além disso, a identificação dos isolados foi também realizada através de amplificação do DNA por PCR, após armazenamento dos espécimes em água ultra pura, e os níveis salivares de estreptococos do grupo mutans foram avaliados por real-time PCR. Nas faixas etárias avaliadas, não se observou correlação entre prevalência de patógenos orais e tipo de hábitos de dieta e higiene oral, sendo esta relacionada ao número de dentes irrompidos, principalmente com relação à prevalência de cocos cariogênicos e suas populações. Os microrganismos mais freqüentemente detectados aos 6 meses, pertenciam ao gênero Actinomyces, Campylobacter rectus, e à espécie Fusobacterium nucleatum. De maneira geral, aos 6 meses, a colonização da cavidade bucal dos bebês, por esses microrganismos, era transitória, por vezes não sendo observados em coletas subseqüentes. Aos 12 meses, observou-se uma elevação na prevalência de Actinomyces sp., Fusobacterium nucleatum e Streptococcus sobrinus. Nesta faixa etária, a presença de Eikenella corrodens foi... / The purpose of this study was to evaluate oral microorganisms of 50 infants and their mothers, in the ages of 6, 12, 18 and 24 months, integrants of Baby-Clinic’s preventive program (Dental School of Aracatuba- UNESP). This factor was related to diet, oral hygiene habits, presence of teeth, prevalence of caries and periodontal conditions. After clinical exam, saliva and oral biofilm were collected and stored for culture and PCR process. Salivary levels of Streptococcus mutans were measured by Real time PCR. In the ages of the infants examined, after statistical analysis, it could be observed that no correlation was found between presence of oral pathogens and diet and hygiene habits, otherwise, this correlation could be seen with increase of erupted teeth. Most frequent microorganisms found in oral flora of infants at six months were Actinomyces, Campylobacter rectus and Fusobacterium nucleatum. Microorganisms observed at one period, could not be found in the other, suggesting that it was not a resident flora. At 12 months, data revealed increase in prevalence of Actinomyces sp., Fusobacterium nucleatum e S. sobrinus. In this age, the presence of Eikenella corrodens was significant. At 18 months, significant increase in the population of Actinomyces sp., Eikenella corrodens, Fusobacterium nucleatum, Streptococcus mutans e S. sobrinus was found. At 24 months, oral microflora was similar to the anterior but Streptococcus mutans and S. sobrinus, had an increase of population. Positive correlation between microorganisms found in mouth of mother and children in all periods was observed. For this reason, educative and preventive measures, which aim control of oral biofilm, must be priority, and made associated with attendance of the infants, as mothers are main transmissive ways to their children. Besides, the control of oral biofilm, as eruption... (Complete abstract click electronic access below)

Made available in DSpace on 2014-06-11T19:33:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-10-10Bitstream added on 2014-06-13T18:45:14Z : No. of bitstreams: 1 gomes_sc_dr_arafo.pdf: 850712 bytes, checksum: fa6f8a08cc10e339a029c7d3240d7c5f (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / No presente estudo foi avaliado o efeito do controle de placa bacteriana supragengival sobre parâmetros clínicos e microbiológicos subgengivais, comparando-o em pacientes nunca fumantes (NFU) e fumantes (F). Durante esse ensaio clínico (6 meses), 25 pacientes, de cada grupo, foram examinados clinicamente, por um examinador calibrado, no momento inicial (I) e aos 30, 90 e 180 (exame final F) dias. 45 desses indivíduos contribuíram com amostras para cálculo do volume de fluido e avaliação microbiológica. As médias do percentual de sítios com IPV, ISG e SS e as médias da PS e PI (em milímetros), do volume de fluido (æl) e as médias do número de bactérias totais (Eubactéria, Eu), Porphyromonas gingivalis (Pg), Peptostreptococcus micros (Pm), Dialister pneumosintes (Dp), Actinobacillus actinomycetemcomitans (Aa) foram geradas para o indivíduo e, posteriormente, para os grupos. Dados do exame inicial e final foram comparados (teste Wald, p=0.05). Foi observado que o efeito do controle de placa bacteriano supragengival contribuiu para a redução significante de IPV (NFU- I: 91,1 e F: 8,7; FU- I: 88,5 e F: 6,4), ISG (NFU- I: 83,8 e F: 2,2; FU- I: 76,1 e F: 0,3), SS (NFU- I: 95,0 e F: 21,6; FU- I: 94,4 e F: 25,3), PS (NFU- I: 3,7 e F: 2,6; FU- I: 3,9 e F: 2,8), PI (NFU- I: 3,4 e 3.0; FU- I: 4., e F: 3,7), volume de fluido (NFU- I: 0,59 e F: 0,23; FU- I: 036 e F- 0,16) e número de Eubactérias (NFU- I: 1,09x105; F: 2,3x101; FU- I: 1,9x105; F: 1,9x101); Pg (NFU- I: 1,07x103; F: 7,0x101; FU- I: 1,4x103; F: 9,4x101); Pm (NFU- I: 2,1x105; F: 0,3x105; FU- I: 6,8x105; F: 0,5x105); Aa (NFU- I: 2,5x101; F: 1,0x101; FU- I: 1,7x101; F: 0,76x101) e Dp (NFU- I: 3,7x101; F: 0,72x101; FU- I: 9,6x101; F: 0,83x101). Ao final do estudo, pacientes fumantes apresentaram menor ISG e volume de fluido, maior PI e menor número de baterias totais.... / The present study aimed to investigate the effect of a supragingival plaque control regiment and to compare this effect between never smokers (NS) and smokers (S) periodontitis patients. During the 6 months experimental period 50 patients, 25 in each group, were clinically examined by a singular calibrated examiner in the baseline (I), 30, 90 and 180 days (F). 45 individuals contributed with GCF and microbiological sampling. Mean values of the percentage of sites VPI+, MBI+, BOP, the PPD and CAL measurements (mm), GCF volume (æl) and number of the Eubacteria (Eu); Porphyromonas gingivalis (Pg), Peptostreptococcus micros (Pm), Dialister pneumosintes (Dp), Actinobacillus actinomycetemcomitans (Aa), were calculated for the individual to compose the groups means. Data from baseline and final examinations were compared (test Wald p=0.05). It could be observed that a supragingival plaque control significantly contributed to VPI NSI: 91.1 and F: 8.7; S- I: 88.5 e F: 6.4), MBI (NS- I: 83.8 e F: 2.2; S- I: 76.1 e F: 0.3), BOP (NS- I: 95.0 e F: 21.6; S- I: 94.4 e F: 25.3), PPD (NS- I: 3.7 e F: 2.6; SI: 3.9 e F: 2.8); CAL (NS- I: 3.4 e 3.0; S- I: 4.3 e F: 3.7), GCF (NS- I: 0.59e F: 0.23; S- I: 0.36 e F: 0.16) and number of Tb (NS- I: 1.09x105; F: 2.3x101; S- I: 1.9x105; F: 1.9x101); Pg (NS- I: 1.07x103; F: 7.0x101; S- I: 1.4x103; F: 9.4x101); Pm (NS- I: 2.1x105; F: 0.3x105; S- I: 6.8x105; F: 0.5x105); Aa (NS- I: 2.5x101; F: 1.0x101; S- I: 1.7x101; F: 0.76x101) and Dp (NS- I: 3.7x101; F: 0.72x101; S- I: 9.6x101; F: 0.83x101) reductions. At the end, smokers presented less marginal bleeding, CAL, GCF volume and lower numbers of Eubacteria then never smokers. It can be concluded that both never smokers and smokers periodontitis patients can benefit from a supragingival plaque control regimen, even though 30 smokers presented less marginal bleeding and less number of Eubacteria at the end.

Objetivo: o objetivo deste estudo foi avaliar as condições de saúde bucal e a ocorrência de anomalias dentárias em crianças tratadas para leucemia linfoblástica aguda (LLA) no Serviço de Oncologia Pediátrica (SOP) do Hospital de Clínicas de Porto Alegre (HCPA), comparadas com um grupo crianças saudáveis. Amostra: foram selecionadas 56 crianças com diagnóstico de LLA e analisadas as presenças de anomalias dentárias e os índices CPO-D (cariado, perdido, obturado-dente), IPV (índice de placa visível), ISG (índice de sangramento gengival) e fluxo salivar. As crianças tratadas apresentaram uma média de idade, na época do diagnóstico da LLA, de 5,3 ± 2,6, e 11,8 ± 4,2 na avaliação, sendo 32 masculinos e 24 femininos. Os pacientes tratados para LLA foram divididos em três grupos: crianças tratadas somente com quimioterapia, com quimio e radioterapia, e com quimio, radio e transplante de medula óssea. Resultados: os resultados revelaram 80,4% de anomalias dentárias nas crianças tratadas, ou seja, 45 destas apresentaram pelo menos uma alteração, e o grupo de pacientes tratados com quimio, radio e submetidos ao transplante de medula óssea foi o que revelou a maior média de anormalidades dentárias por indivíduo (15,37 ± 15,03), não ocorrendo diferença estatística entre os gêneros. As crianças tratadas para LLA obtiveram CPO-D de 1,9 ± 4,0, ISG de 26,5%, IPV de 72,0%, e índice de fluxo salivar médio de 0,19 mL/min criança. Já o grupo de crianças sadias apresentou CPO-D de 1,52 ± 3,5, ISG de 11,1%, IPV de 53,8% e índice de fluxo salivar médio de 0,27 mL/min. Conclusão: o tratamento para a cura da LLA provoca um aumento significativo no número de anomalias dentárias, sendo mais freqüente nos pacientes menores de cinco anos de idade, principalmente nos pacientes submetidos a quimio e radioterapia associadas ao transplante de medula óssea, o que requer, por parte do cirurgião-dentista, intervenções clínicas diferenciadas e cuidadosas nestes pacientes, tendo-se em vista também os índices aumentados de ISG e IPV. As alterações sofridas pelas glândulas salivares durante o tratamento não são permanentes sob o aspecto do fluxo salivar, que retorna à normalidade. A orientação e o acompanhamento adequados destes pacientes por parte da equipe de saúde bucal podem mantê-los com o índice de CPO-D dentro dos padrões preconizados pela Organização Mundial de Saúde. / Objective: the objective of this research was to evaluate oral health conditions and the occurrence of dental anomalies in children treated for acute lymphoblastic leukemia (ALL) in the Pediatric Oncology Service at Hospital de Clínicas de Porto Alegre (HCPA), in comparison to a healthy children group. Sample: 56 children diagnosed with ALL were selected and the occurrence of dental anomalies and the rates DMF-T (decayed, missing, filled-tooth), RVDP (rate of visible dental plaque), RGB (rate of gingival bleeding) and salivary flow were analyzed. The treated children at the time of the diagnostic for ALL were in the average age of 5,3 ± 2,6, and 11,8 ± 4,2 at the evaluation, with 32 male and 24 female. The patients treated for ALL were divided in three groups: children only treated with chemotherapy, with chemotherapy and radiotherapy, and with chemotherapy, radiotherapy and bone marrow transplant. Results: the results showed 80,4% of dental anomalies in treated children, it means that 45 children had at least one disorder, and the group of patients treated with chemotherapy, radiotherapy and who underwent a bone marrow transplant showed the highest average of dental anomalies per person (15,37 ± 15,03), with no statistic difference concerning gender. The children treated for ALL had DMF-T of 1,9 ± 4,0, RGB of 26,5%, RVDP of 72,0%, and average salivary flow of 0,19 mL/min child. But the healthy children group showed DMF-T of 1,52 ± 3,5, RGB of 11,1%, RVDP of 53,8% and average salivary flow of 0,27 mL/min. Conclusion: the treatment to cure ALL causes a significant increasing in the cases of dental anomalies, mainly in patients under chemotherapy and radiotherapy associated to bone marrow transplant, what requires from the oral surgeon, careful and specific clinical interventions, also considering the increased rates of RGB and RVDP. The disorders in the salivary glands during the treatment are not permanent in what concerns the salivary flow, that becomes normal again. The adequate orientation and care of these patients by the oral health team can keep their DMF-T rates in the patterns ruled by the World Health Organization.

Bakgrund: MI är en metod för rådgivning och för att hjälpa individen att hitta och bibehålla motivation till förändrat beteende. På senare år har metoden börjat användas även inom tandvården. Syfte: Syftet med studien var att genom en litteraturöversikt sammanställa effekten av MI på parodontala sjukdomar och karies hos barn, ungdomar och vuxna. Metod: Studien består av en litteraturöversikt där vetenskapliga artiklar har tagits fram genom sökningar i databaserna PUBMED, DOSS, Medline, Psychinfo och CINAHL som sedan granskats och sammanställts. Sjutton artiklar har utvalts utifrån de inklusion/exklusion kriterier som fanns. De studierna som blev inkluderade i resultatet har blivit granskade med hjälp av en mall för att kunna identifiera studiernas värde för litteraturstudien. Resultat: De utvalda artiklarna var från Frankrike, Kanada, Kina, Tyskland, Iran, Indien, Serbien, Spanien, Sverige och USA. Ungefär hälften av artiklarna påvisade ett positivt resultat för patienter som genomgått MI-samtal i kombination med vanlig behandling jämfört med kontrollgrupper. Den andra hälften såg inga dylika resultat. Slutsats: Metoden tycks ha effekt i vissa sammanhang men inte i andra. En faktor som inte visade någon påverkan på effektiviteten av MI var patienternas ålder. Ytterligare forskning krävs för att fastställa vilka faktorer som påverkar resultatet vid användning av MI inom tandvården. / Background: MI is a method for counseling and for helping individuals find and maintain motivation for change of behavior. In later years the method has also seen some use in dental care.   Aim: To study the effect of MI on parodontal diseases and caries in children, adolescents and adults.   Method: The study design was a literature review where scientific articles were gathered by searching through databases like for example PUBMED, DOSS, Medline, Psychinfo and CINAHL and then scrutinized and summarized. Seventeen articles were selected according to existing inclusion-/exclusion criteria. The included studies were reviewed with a modified review template to present studies of strong/moderate value.     Result: The selected articles were from Canada, China, France, Germany, Iran, India, Serbia, Spain, Sweden and USA. About 50% of the articles indicated a positive result for patients who undertook MI-sessions in combination with regular treatment, compared to control groups. The other half could see no such results.   Conclusion: The method seems to have effect in some instances but not in others. A factor that showed no alteration of MI effectiveness was the patients’ age. Further research is required to determine what factors might influence the outcome of using MI in dental care.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The objective of this randomized blind clinical trial was to evaluate, in individuals using the appropriate oral hygiene method, the frequency of plaque removal hygiene in the maintenance of gingival health. Eligible patients (maximum 15% of gingival bleeding) underwent a pre-experimental period in order to eliminate factors that could interfere with proper plaque control, and obtain gingival health (maximum 5% of gingival bleeding). Fifty-two patients were randomized into four groups according to the frequency of oral hygiene (every 12h, 24h, 48h or 72h). Plaque Index (PLI) and Gingival Index (GI) were evaluated by two trained and blinds examiners at baseline, 15 days and 30 days. The primary outcome was the increase of the mean GI, and the secondary outcomes was IPL changes, and mean percentage of sites with different GI scores throughout the experimental period. Three patients quit the study (one from the 12h group and two from the 48h group). Regarding the PLI, the 12h group showed no changes during the experimental period. The other groups showed a significant increase in the average PLI between baseline and 15 days, with the maintenance of average plaque levels at 30 days. In the 12h and 24h groups, no average GI alterations were observed. In the 48h and 72h groups, we observed an increase in the mean GI between baseline and 15 days, sustained at 30 days. When the same analysis was performed by categorizing the sites in free and proximal surfaces, the same model of plaque accumulation and inflammatory changes was observed. However, in the proximal surfaces, the GI and PLI mean were always higher than those observed in free surfaces. At the end of study, the mean percentage of sites presenting scores of 1 and 2 in the IG was significantly greater in the 48h and 72h groups compared to the 12h and 24h groups. We conclude that frequency of plaque removal of 12h and 24h are compatible with gingival health. Key-words: Gingivitis. Toothbrushing. Oral hygiene. / O objetivo deste ensaio clínico randomizado cego foi avaliar, em indivíduos com adequado método de higiene bucal, a frequência de remoção de placa para manter saúde gengival. Pacientes elegíveis (máximo 15% de sangramento gengival a sondagem) passaram por um período pré-experimental a fim de remover fatores que pudessem interferir no controle da placa, e alcançar saúde gengival (máximo 5% de sítios com sangramento gengival). Cinquenta e dois pacientes foram randomizados em quatro grupos de acordo com as frequências de higiene bucal: 12h, 24h, 48h, e 72h. Os índices de placa (IPl) e gengival (IG) foram avaliados no baseline, 15 e 30 dias por dois examinadores treinados e cegos quanto aos grupos experimentais. O desfecho primário foi o aumento da média de IG, e os secundários foram alterações no IPl, e porcentagens médias de sítios apresentando diferentes escores de IG ao longo do período experimental. Três indivíduos (um do grupo 12h, e dois do grupo 48h) não finalizaram o estudo. O grupo 12h manteve baixos escores médios de placa ao longo do período experimental. Os demais grupos apresentaram aumento significativo na média do IPl nos primeiros 15 dias. Após este período, os níveis de placa se mantiveram estáveis. No grupo de 12h e 24h nenhuma alteração na média do IG foi observada. Nos grupos de 48h e 72h, aumento da média do IG foi observado entre o baseline e 15 dias, mantendo-se em 30 dias. Quando a mesma análise foi realizada categorizando os sítios em faces livres e proximais, o mesmo modelo de acúmulo de placa e de alterações inflamatórias foi verificado. Contudo, nas faces proximais, as médias de IG e IPL foram sempre maiores do que as observadas nas faces livres para todos os grupos. O percentual médio de sítios apresentando escore 1 e 2 do IG foi significativamente maior nos grupos de 48h e 72h quando comparados aos de 12h e 24h no final do estudo. Nós concluímos que frequências de remoção de placa de 12h e 24h são compatíveis com saúde gengival. Palavras-chave: Gengivite. Escovação. Higiene bucal.