Caries of the pits and fissures of permanent teeth continues to be a problem for children. Newly erupted permanent molars are particularly at risk. Oral hygiene measures have been shown to be able to reduce the incidence of caries. The aim of this study was to compare the caries preventive effects of a professional tooth cleaning and oral health education programme (test) with a standard preventive programme (comparison), comprising selective fissure sealing and application of topical fluorides on newly erupted first permanent molars. School Dental Service clinics of the Health Department of Western Australia, in Perth, were assigned to test (4)or comparison (4) clinics. Schoolchildren, mean age 6.3 plus or minus 0.3 (s) yr with, sound, newly erupted first permanent molars were included in the study (n=404; 207 test; 197 control).Children were examined after twelve and twenty-four months by an examiner who was 'blind' to the test or control status of the children. After twelve months, 186 test and 163 control children were examined, and after twenty-four months, 179 test and 156 control children were examined. Three hundred and twenty children were examined in both years. After twenty-four months, 32 children in test and 31 children in control developed caries of the first permanent molars, the estimated risk ratio was 0.90 (95% CI 0.58, 1.41); and children in the test group had an average DFT score of 0.30 plus or minus 0.75 compared with 0.30 plus or minus 0.70 DFT in the control group (t-test, p=0.96). The results suggest that, after two years, there was no statistically significant difference between the caries preventive effects of a professional tooth cleaning and oral health education programme and a programme based on selective fissure sealing and application of topical fluorides.Baseline deciduous caries experience, presence of hypomineralised first ++ / permanent molars and frequency of toothbrushing were statistically significant factors in predicting molar caries. Using baseline deciduous caries experience as a screening criterion to predict permanent molar caries, sensitivity of 0.67 and specificity 0.61 were obtained at a cutpoint of 1 dmfs. Sensitivity and specificity values were maximised at 0.72 by using a combined baseline dmfs and hypomineralisation as screening criteria. Cost-effectiveness analysis indicated an incremental cost-effectiveness ratio of $40/child/year. The test programme was more costly and produced similar outcomes and does not warrant adoption on economic grounds.

<p>A well designed metal-based removable partial denture (MBRPD) is a cost-effective and a conservative method of rehabilitating a partially edentulous mouth. The MBRPD demands that the abbutment tooth provides support and/or retention while the abutment tooth, in turn, expects the MBRPD to transmit the forces axially and to be passive when fully seated. For vertical forces to be transmitted axially, occlusal rest seats have to be prepared on the abutment teeth to receive a cast metal rest of the MBRPD. The&nbsp / objective of this study was to compare occlusal rest seat preparations for metal-based removable partial dentures (MBPRD) prepared by dental students at the UWC Oral Health centres, to the corresponding cast metal rests and to determine action taken in response to discovered discrepancies between the rest seat preparation depth and the cast metal occlusal rset thickness.</p>

Thesis (M. Sc.)--University of Alberta, 1996. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M. Sc.)--University of Alberta, 1996. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Made available in DSpace on 2014-06-11T19:28:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-02-01Bitstream added on 2014-06-13T20:58:45Z : No. of bitstreams: 1 becker_ab_me_arafo.pdf: 784680 bytes, checksum: 4ca0146d3f12e8e45571df6e8dde9abf (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo deste estudo foi comparar o efeito das placas estabilizadora rígida (PER), resiliente (PR) e não oclusiva (PNO) junto com o aconselhamento (esclarecimento da natureza benigna do problema, posição postural de repouso e mastigação bilateral simultânea) em pacientes com DTMs de origem muscular, durante 90 dias. Para tal utilizou-se uma amostra de 42 pacientes de ambos os sexos, faixa etária dos 18 aos 65 anos, com queixa de dor nos músculos mastigatórios (masséter, temporal e/ou pterigóideo lateral) há mais de 6 meses. Foram excluídos pacientes portadores de doenças sistêmicas. Os pacientes foram distribuídos aleatoriamente em um dos três grupos. Este estudo foi duplo cego sendo que as reavaliações foram realizadas por um examinador não consciente ao grupo ao qual o paciente pertencia e a entrega e ajustes das placas foram feitos por outro examinador. A avaliação subjetiva da dor foi realizada por meio do índice de severidade dos sintomas (ISS-mod.) com escores de intensidade, freqüência e duração da dor. A análise estatística mostrou que as 3 placas foram capazes de reduzir o ISS-mod. de maneira similar (teste de Kruskal-Wallis) entre os períodos inicial e final, de forma estatisticamente significante (PER p=0,001) (PR p=0,000) (PNO p=0,000), entretanto não houveram diferenças entre os diferentes grupos (p=0,165). Para a avaliação objetiva foram realizados exame de palpação e mensurações do grau de abertura bucal e dos movimentos excursivos (lateralidade e protrusão). Houve aumento do grau da abertura bucal e da amplitude dos movimentos excursivos, porém este aumento não foi estatisticamente significante entre os períodos inicial e final (90 dias) do estudo nem entre os diferentes grupos. O exame de palpação muscular mostrou diferenças entre os grupos para o músculo masséter D, sendo que esta diferença... / The aim of this study was to compare for a 90-day period the therapy with hard (HS), soft (SS) and placebo occlusal (PS) splints in conjunction to advising (jaw rest position and chewing both side), for temoromandibular disorders (TMD) patients. For this purpose, it were selected 42 patients, both genders, ranging in age from 18 to 65, with a chief complaint of pain in the masticatory muscles (masseter, temporalis, and/or lateral pterygoid) for at least 6 months. Subjects were excluded if they presented any systemic disease. This was a double blind study and patients were randomly assigned to 1 of the 3 experimental therapy groups. The modified symptom severity index (SSI) assessed the general subjective severity of pain and included the intensity, duration, and frequency of the chief complaint at the baseline and the final period treatment. Statistical analysis of the data (ANOVA at a 0.01 confidence level) showed that the 3 appliances were able to reduce the modified SSI in a similar way (HS P = 0.001; SS P = 0.001; PS P = 0.001), however no differences were found among the three groups (P = 0.16). The clinical examination included tenderness to palpation, measurement of maximum pain-free opening and measurement of excursive mandibular movements at the baseline and the final treatment period. There was no significant difference among the treatment responses of the three groups in terms of an increase in maximum pain-free opening (P>0.01) and mandibular movements (P>0.01). Tenderness to palpation of the masticatory muscles showed significant reduction between groups for masseter right side, this difference being significant between the groups HS and SS (P =0,0017) and the groups HS and PS (P =0,0067). The difference between the groups SS and PS was not significant (P =6718). The results of the present study suggested that over ...(Complete abstract, click electronic access below)

Four groups of equids, "Anchitheriinae," Merychippine-grade Equinae, Hipparionini, and Equini, coexisted in the middle Miocene, and only the Equini remains after 16 million years of evolution and extinction. Each group is distinct in its occlusal enamel pattern. These patterns have been compared qualitatively but rarely quantitatively. The processes controlling the evolution of these occlusal patterns have not been thoroughly investigated with respect to phylogeny, tooth position, and climate through geologic time. I investigated two methods of quantitative analysis, Occlusal Enamel Index for shape and fractal dimensionality for complexity. I used analyses of variance and an analysis of co-variance to test hypotheses of process. Results suggest that enamel shape was controlled by phylogeny, tooth position, and climate. The lower taxonomic levels are shown to have a strong effect on complexity, suggesting behavior is driving complexity rather than overarching phylogenetic constraint.

Orientador: Francisco Guedes Pereira de Alencar Junior / Banca: Gerson Bonfante / Banca: Renata Garcia Fonseca / Resumo: O objetivo deste estudo foi comparar o efeito das placas estabilizadora rígida (PER), resiliente (PR) e não oclusiva (PNO) junto com o aconselhamento (esclarecimento da natureza benigna do problema, posição postural de repouso e mastigação bilateral simultânea) em pacientes com DTMs de origem muscular, durante 90 dias. Para tal utilizou-se uma amostra de 42 pacientes de ambos os sexos, faixa etária dos 18 aos 65 anos, com queixa de dor nos músculos mastigatórios (masséter, temporal e/ou pterigóideo lateral) há mais de 6 meses. Foram excluídos pacientes portadores de doenças sistêmicas. Os pacientes foram distribuídos aleatoriamente em um dos três grupos. Este estudo foi duplo cego sendo que as reavaliações foram realizadas por um examinador não consciente ao grupo ao qual o paciente pertencia e a entrega e ajustes das placas foram feitos por outro examinador. A avaliação subjetiva da dor foi realizada por meio do índice de severidade dos sintomas (ISS-mod.) com escores de intensidade, freqüência e duração da dor. A análise estatística mostrou que as 3 placas foram capazes de reduzir o ISS-mod. de maneira similar (teste de Kruskal-Wallis) entre os períodos inicial e final, de forma estatisticamente significante (PER p=0,001) (PR p=0,000) (PNO p=0,000), entretanto não houveram diferenças entre os diferentes grupos (p=0,165). Para a avaliação objetiva foram realizados exame de palpação e mensurações do grau de abertura bucal e dos movimentos excursivos (lateralidade e protrusão). Houve aumento do grau da abertura bucal e da amplitude dos movimentos excursivos, porém este aumento não foi estatisticamente significante entre os períodos inicial e final (90 dias) do estudo nem entre os diferentes grupos. O exame de palpação muscular mostrou diferenças entre os grupos para o músculo masséter D, sendo que esta diferença ...(Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The aim of this study was to compare for a 90-day period the therapy with hard (HS), soft (SS) and placebo occlusal (PS) splints in conjunction to advising (jaw rest position and chewing both side), for temoromandibular disorders (TMD) patients. For this purpose, it were selected 42 patients, both genders, ranging in age from 18 to 65, with a chief complaint of pain in the masticatory muscles (masseter, temporalis, and/or lateral pterygoid) for at least 6 months. Subjects were excluded if they presented any systemic disease. This was a double blind study and patients were randomly assigned to 1 of the 3 experimental therapy groups. The modified symptom severity index (SSI) assessed the general subjective severity of pain and included the intensity, duration, and frequency of the chief complaint at the baseline and the final period treatment. Statistical analysis of the data (ANOVA at a 0.01 confidence level) showed that the 3 appliances were able to reduce the modified SSI in a similar way (HS P = 0.001; SS P = 0.001; PS P = 0.001), however no differences were found among the three groups (P = 0.16). The clinical examination included tenderness to palpation, measurement of maximum pain-free opening and measurement of excursive mandibular movements at the baseline and the final treatment period. There was no significant difference among the treatment responses of the three groups in terms of an increase in maximum pain-free opening (P>0.01) and mandibular movements (P>0.01). Tenderness to palpation of the masticatory muscles showed significant reduction between groups for masseter right side, this difference being significant between the groups HS and SS (P =0,0017) and the groups HS and PS (P =0,0067). The difference between the groups SS and PS was not significant (P =6718). The results of the present study suggested that over ...(Complete abstract, click electronic access below) / Mestre

Orientador: Alexandre Brait Landulpho / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-11T08:50:28Z (GMT). No. of bitstreams: 1 Vedana_Leonardo_M.pdf: 860292 bytes, checksum: cbeda2c9e71e9f5e1171bac210c12073 (MD5) Previous issue date: 2008 / Resumo: Este estudo teve como objetivo investigar o comportamento da atividade eletromiográfica durante a função mastigatória, em pacientes portadores de alterações funcionais do sistema estomatognático, submetidos à terapia por meio de aparelhos interoclusais planos. Para a realização das avaliações eletromiográficas foi utilizado o sistema de diagnóstico computadorizado K6 - I DIAGNOSTIC SYSTEM (Myo-Tronics, Inc.; Tukwila, W.A.; USA). Foram examinados e tratados vinte voluntários, com idade entre 18 e 53 anos, de ambos os sexos. As avaliações eletromiográficas para a verificação da atividade elétrica dos músculos masseter e temporal fascículo anterior, foram realizadas antes do tratamento e após 90, 120, e 150 dias de utilização dos aparelhos interoclusais planos, sendo que estes aparelhos receberam modificações nos dias 90 (guia em canino) e 120 (guia em grupo) respectivamente. Os dados coletados de cada fase do estudo foram submetidos a uma análise estatística através de um modelo de egressão linear simples. Após análise dos resultados obtidos, não se observou diferenças estatisticamente significativas para as três fases do estudo (p>0,05), porém pode-se observar que a atividade eletromiográfica dos músculos masseter e temporal anterior, tenderam ao equilíbrio bilateral no decorrer do tratamento / Abstract: This study investigated through computerized electromyography (EMG) the effectiveness of interocclusal appliances ín assessing patients with functional changes in the stomatognathic system. Twenty volunteers, aged 18-53 years, both genders, presenting with signs and symptoms of functional changes ín the stomatognathic system, were examined and treated. Electrical activity of the masseter and anterior temporalis muscles was measured and recorded before treatment and 90, 120, and 150 days postoperatively. Appliances were modified at day 90 (Canine guidance) and 120 (group guidance). Data were statistically analyzed using a simple linear regression mode!. A bilateral balance during treatment was obseryed for the EMG activity. of the masseter and anterior temporalis, under masticatory function; however; no statistically significant difference was observed. / Mestrado / Protese Dental / Doutor em Clínica Odontológica

Objetivo: avaliar a relação entre o tipo facial e as variações da inclinação do Plano Oclusal e do ângulo ANB em indivíduos com oclusão normal. Material e Método: a amostra foi composta por 98 telerradiografias em norma lateral de 98 indivíduos (47 homens e 51 mulheres) com idade média de 15,2 anos (desvio padrão de 1,4 anos), com oclusão normal e perfil harmonioso. As radiografias foram digitalizadas em escala 1:1 eo programa Nemoceph (Nemotec® - Espanha), foi usado para a análise cefalométrica, que incluiu as cinco variáveis que segundo Ricketts definem o padrão facial, a relação sagital (SNA, SNB, ANB, N.S.Ba, SN.Go-Me, ANB individualizado, AP-BP e Wits)e ainclinação do Plano Oclusal (PLO.Linha S-N, PLO.PF, PLO.PP, PLO.XiPm e PLO.PM). Os dados foram analisados estatisticamente com um nível de significância de 5%. Resultados: acomposição dos tipos faciais foi: 11% dólicofaciais, 39% mesofaciais e 50% braquifaciais. Os valores médios e intervalo de confiança de 95% das variáveis que avaliaram a inclinação do plano oclusal, para os tipos faciais dólico, meso e braqui foramrespectivamente: PLO.SN: 21,7° (± 2,14°), 17,0° (± 1,10°) e 15,1° (± 1,43°); PLO.PF: 13,5° (±1,77)°, 10° (SD 1,01°) and 8,1° (± 1,25°); PLO.PP: 12,2° (±1,99°), 9.1° (± 1,31°) e 8,1° (± 1,21°); PLO.Xi-Pm: 20,5° (± 1,76°), 19,2° (± 0,96°) e 16,4° (± 1,12°); PLO.PM: 17,5° (± 2,02°), 15,3° (± 1,27°) e 12,1° (± 1,19°). Os valores médios das variáveis que avaliam a relação sagital maxilomandibular respectivamente foram: ANB: 3,8° (± 0,98°), 2,5° (± 0,62°) e1,3° (± 0,53°); distância AP-BP: 7,3mm (± 2,19mm), 3,4mm (± 0,94mm) e 1,9mm (± 0,78mm); ANB Individualizado: 4,7° (± 0,70°), 4,4° (± 0,43°) e 3,7° (± 0,39°); Wits: 1,8mm (± 1,27mm), -2,4mm (± 0,83mm) e -3,5mm (± 0,92mm). Conclusões: Tanto as variáveis que avaliam a inclinação do Plano Oclusal como as variáveis que avaliam a relação sagital maxilo-mandibular ANB e AP-BP, caracterizam-se diferencialmente segundo o tipo facial, observando-se um decréscimo dos valores do tipo dólicofacial para o braquifacial. / Objective: evaluate the relation between the facialtype and the inclination of the occlusal plane and ANB angle in individuals with normal occlusion.Material and Methods: the sample was composed of 98 radiographs, in lateral norm, of 98 individuals (47 men, 51 women), with an average age of 15.2 years (standard deviation of 1.4 years), normal occlusion and harmonic profile.The radiographs were digitalized in a 1:1 scale and the software Nemoceph (Nemotec® - Spain) was used for the cephalometric analysis, which included Rickettsfive variables thatdetermine the facial type, the saggital relation (SNA, SNB, ANB, N.S.Ba, SN.Go-Me, ANB individualized, AP-BP and Wits) and theinclination of the occlusal plane (OPL.S-N, OPL.PF, OPL.PP, OPL.XiPmand OPL.PM). The data was analyzed statistically with a significance level of 5%.Results: the composition of the sample by facial type was: 11% dolichofacial, 39% mesofacial e 50% braquifacial. The averagevalues and 95% confidence interval of the variables that measured the inclination of the occlusal plane, for the dolichofacial, mesofacial and braquifacialgroups were,respectively: OPL.SN: 21.7° (± 2.14°), 17.0° (± 1.10°) and 15.1° (± 1.43°); OPL.PF: 13.5° (±1.77)°, 10° (SD 1.01°) and 8.1° (± 1.25°); OPL.PP: 12.2° (± 1.99°), 9.1° (± 1.31°) and 8.1° (± 1.21°); OPL.Xi-Pm: 20.5° (± 1.76°), 19.2° (± 0.96°) and 16.4° (± 1.12°); OPL.PM: 17.5° (± 2.02°), 15.3° (± 1.27°) and 12.1° (± 1.19°). The average values and 95% confidence interval of the variables that measure the maxilar-mandibular saggital relation were respectively: ANB: 3.8° (± 0.98°), 2.5° (± 0.62°) and1.3° (± 0.53°);distance AP-BP: 7.3mm (± 2.19mm), 3.4mm (± 0.94mm)and 1.9mm (± 0.78mm); ANB Individualized: 4,7° (± 0.70°), 4.4° (± 0.43°) and 3.7° (± 0.39°); Wits: 1.8mm (± 1.27mm), -2.4mm (± 0.83mm)and -3.5mm (± 0.92mm). Conclusion: Both variables that measure the inclination of the occlusal plane and the variables that measure the ANB and AP-BP maxillomandibularsaggital relation have different characteristics according to the facial type, being observed a decrease in values from the dolichofacial type to the brachifacial type.

Magister Chirurgiae Dentium - MChD / A well designed metal-based removable partial denture (MBRPD) is a cost-effective and a conservative method of rehabilitating a partially edentulous mouth. The MBRPD demands that the abbutment tooth provides support and/or retention while the abutment tooth, in turn, expects the MBRPD to transmit the forces axially and to be passive when fully seated. For vertical forces to be transmitted axially, occlusal rest seats have to be prepared on the abutment teeth to receive a cast metal rest of the MBRPD. The&nbsp; objective of this study was to compare occlusal rest seat preparations for metal-based removable partial dentures (MBPRD) prepared by dental students at the UWC Oral Health centres, to the corresponding cast metal rests and to determine action taken in response to discovered discrepancies between the rest seat preparation depth and the cast metal occlusal rset thickness. / South Africa