Abstract: This study aimed to describe the morphometric relationship of root canal orifices on the pulp floor in the presence/absence of mesiobuccal second canal (MB2) in the maxillary first molars and other aspects of its internal anatomy. Sixty-two maxillary first molars were scanned by micro-CT. The presence of the MB2 canal was verified. The distance between the center points of the MB1, MB2, distobuccal (DB), and palatal (P) canal orifices on the pulp floor were measured (MB1-MB2, MB1-DB, MB2-DB, MB1-P, and DB-P). The MB1-P to DB-P ratio was calculated. The distances between the anatomic apex and the MB1 and MB2 apical foramina were measured. The length of the band-shaped isthmus was also measured. Student's t-test was applied to verify the association between the presence of an MB2 canal, the interorifice distances, and the ratio of the MB1-P to DB-P distance (α = 5%). The MB2 canal was present in 43 roots (69.35%). Statistics showed significant differences when MB2 was present for the largest MB1-P distance (p < 0.05) and higher values for the MB1-P to DB-P ratio (p < 0.05). A band-shaped isthmus was detected in 25.8% of MB roots. The mean distance from the apical foramen to the isthmus floor ranged from 1.74 for MB1 canals to 1.42 for MB2 canals. Canal orifice distances on the pulp floor may predict the presence of MB2 canals. There was a high incidence of isthmus, accessory canals, and apical delta in the critical apical zone in MB roots of maxillary first molars.

Abstract To compare the shaping ability of different single-file systems in the preparation of mesial curved canals of mandibular molars using micro-CT technology. Fifteen mesial roots of mandibular molars with two independent and curved canals (n = 30) were selected, scanned at a resolution of 26.7 μm anatomically matched, and distributed into three groups (n = 10), according to the preparation system: WaveOne 25.08, Reciproc 25.08, and OneShape 25.06. A final micro-CT scanning was performed, data sets were registered with their respective counterparts, and compared regarding the three-dimensional (volume, surface area, and structure model index - SMI) and two-dimensional (perimeter, area, roundness, major and minor diameters) parameters, as well as, canal transportation, using ANOVA and post hoc Tukey tests (α = 5%). Overall, no difference was observed between groups regarding area, perimeter, volume, surface area, and canal transportation (p > 0.05). Within group, no canal transportation was significantly higherobserved in the apical third (0.10 ± 0.05 mm) compared to coronal (0.08±0.040 mm) and middle (0.07 ± 0.03 mm) thirds (p < 0.05). Structure model index (SMI) was statistically higher after preparation with OneShape instrument (0.36 ± 0.26) compared to other systems (p < 0.05). Within the parameters of this study, similar shaping ability was observed in the preparation of mesial curved root canals of mandibular molars with Reciproc, OneShape and WaveOne systems.

Abstract Objective: To evaluate the sealing capacity and retention of apical barriers made with mineral trioxide aggregate (MTA) and Portland cement (PC). Material and Methods: Fifty-six bovine incisors were sectioned 8 mm above and 12 mm below the cement-enamel junction. The root canal was enlarged with a diamond drill to create a standard 2.5 mm diameter opening. Apical sheets of 5 mm thickness were placed using white MTA-Angelus or white PC. Fifteen samples of each material were exposed to human saliva in a dual chamber apparatus and casting was evaluated at 30 days. Samples without apical barriers and fully sealed samples were used as positive and negative controls (n = 3), respectively. Data were analyzed by Fisher's exact test (p<0.05) after 3 periods: 1 to 10 days (P1); days 11 to 20 (P2); and days 21 to 30 (P3). Then, three 1 mm thick sections were obtained at the apical level of other root samples of each material (n = 10) and the push-out test was performed Results: The leakage rates in P1, P2 and P3 were 60%, 73.3% and 100% for the MTA; and 73.3%, 86.7% and 100% for CP, with no significant difference between materials, regardless of the period analyzed. There were no significant differences between the bond strengths for both cements (p>0.05) Conclusion: Mineral trioxide aggregate and Portland cement apical barriers presented similar sealing ability and bond strength values.

Abstract The aim of this study was to evaluate the influence of radiation therapy on root canal sealer push-out bond strength (BS) to dentin and the sealer/dentin interface after different final irrigation solutions (NaOCl, EDTA, and chitosan). Sixty-four maxillary canines were distributed into two groups (n=30): non-irradiated and irradiated with 60 Gy. Canals were prepared with Reciproc-R50 and subdivided (n=10) for final irrigation (NaOCl, EDTA, chitosan) and filled. Three dentin slices were obtained from each root third. The first slice of each third was selected for BS evaluation, and the failure mode was determined by stereomicroscopy. SEM analysis of the sealer-dentin interface was performed in the remaining slices. Two-way ANOVA and Tukey's tests (α=0.05) were used. Lower BS (P<0.0001) was obtained after irradiation (2.07±0.79 MPa), regardless of the final irrigation solution used. The NaOCl group (P<0.001) had the lowest BS in the irradiated (1.68±0.72) and non-irradiated (2.39±0.89) groups, whereas the EDTA (irradiated: 2.14±0.77 and non-irradiated: 3.92±1.54) and chitosan (irradiated: 2.37±0.73 and non-irradiated: 3.51±1.47) groups demonstrated a higher BS (P<0.05). The highest values were observed in the coronal third (3.17±1.38) when compared to the middle (2.74±1.36) and apical ones (2.09±0.97)(P<0.0001). There were more cohesive failures and more gaps in irradiated specimens, regardless of the final solution. The present study showed that radiation was associated with a decrease in BS, regardless of the final solution used, whereas chitosan increased BS in teeth subjected to radiation therapy.

Abstract This study evaluates the influence of root dentin treatment with NaOCl alone and combined with EDTA, with and without ultrasound activation, on the push-out bond strength (BS) of fiber-reinforced posts in weakened roots, cemented with RelyX or Panavia. The root canals of 42 maxillary canines were instrumented with Reciproc and 2.5% NaOCl. In the coronal 12mm of all canals, experimental weakening of the roots was produced by reducing dentin thickness with 2.44mm diameter diamond burs. The roots were assigned to 3 groups (n = 14) according to root dentin treatment: 2.5% NaOCl; 2.5% NaOCl + 17% EDTA; and 2.5% NaOCl + 17% EDTA, with solutions agitated using passive ultrasonic irrigation. After cementation of the fiber-reinforced posts the roots were divided in thirds. The first slice of each third was used for the push-out BS test, the second slice for confocal laser scanning microscopy and dentin microhardness (Knoop) analysis. Data were analysed by a two-way ANOVA and Tukey test (a = 0.05). NaOCl + EDTA provided highest BS values than NaOCl (p < 0.0001). Specimens cemented with Panavia presented significantly higher BS than those with RelyX in the three root thirds (p < 0.0001). The highest BS values occurred in the cervical third (p < 0.001). Ultrasound-activated NaOCl + EDTA promoted the greatest reduction in dentin microhardness, followed by NaOCl/EDTA and NaOCl. Ultrasonic activation of NaOCl and EDTA reduced root dentin microhardness, but did not improve the push-out BS of resin-based cements. Panavia presented higher BS than RelyX. RelyX was not influenced by the root dentin treatment protocols.

Abstract The aim of the present study was to evaluate the bond strength (BS) of root canal fillings to root dentin using the reciprocating file-matched single-cone or lateral compaction techniques with resin-based and calcium-silicate-based sealers. Maxillary canine roots were prepared and filled using one of the following approaches: Reciproc R40 file and R40 single cone, WaveOne Large file and Large single cone, or ProTaper up to F4 file with lateral compaction. The root filling was performed using AH Plus, Epiphany SE or MTA Fillapex (n = 10). Three 1-mm-thick slices were obtained from each third of each root. Two slices were subjected to a push-out test, and the other slices were prepared for scanning electron microscopy (SEM) to examine the dentin-sealer interface. Data (in MPa) from the push-out tests were analyzed using a two-way ANOVA and Tukey’s test (p < 0.05). Failure modes (adhesive, cohesive or mixed) were evaluated at ×25 magnification. The single-cone techniques resulted in lower BS values than the lateral compaction technique. For lateral compaction, AH Plus and Epiphany SE showed the highest and lowest BS values, respectively. Slight differences were observed between sealers when the single-cone techniques were used. A tendency to reduce the BS toward the apical third was observed. Adhesive failures were predominant for all experimental conditions. A closer adaption of the filling material on the root dentin was observed for the AH Plus and lateral compaction techniques. The Reciproc and WaveOne techniques were associated with lower BS values than the lateral compaction technique. However, the effect of the root canal filling technique appears to be sealer-dependent.

Abstract This study evaluated the effect of mineral trioxide aggregate (MTA) on the retention of fiber posts in repaired root canal perforations. Ten-millimeter post spaces were prepared in 60 endodontically treated bovine incisors. Root perforations were created in half of the root canals in the cervical area prior to being filled with white MTA-Angelus. Fiber posts were luted into the root canals with two self-adhesive (RelyX Unicem or Set) or self-etching (Panavia F) resin cements. The posts were submitted to a pull-out test, and the data were submitted to two-way ANOVA and Tukey’s post hoc tests (α = 0.05). The fiber posts exhibited reduced retention in MTA-repaired root canal perforations, regardless of the type of resin cement that was used (p < 0.001). Self-adhesive resin cements provided higher bond strength values than Panavia F, while no difference was observed between RelyX Unicem and Set (p > 0.05). The presence of MTA in repaired root perforations negatively affected post retention. In addition, self-adhesive cements seemed to be the best option to lute fiber posts within a root canal in these cases.

Objective: This study evaluated apical transportation associated with ProTaper® Universal Fl, F2 and F3 rotary files in curved canais prepared by undergraduate students. Material and Methods: Twenty mesial roots of mandibular molars with curvatures ranging between 25° and 35° were selected. Mesiobuccal canals were instrumented by twenty students with the ProTaper® system (Dentsply-Maillefer, Ballaigues, Switzerland) according to the manufacturer's instructions. Pre-fiaring was performed with Sl and SX files. A #15 K-file was inserted into the root canal up to the working length (WL), and an initial digital radiograph was taken in a buccolingual direction (baseline). Afterwards, the S1, S2, F1, F2, and F3 files were employed up to the WL. Other radiographies were taken in the same orientation of the baseline after the use of the Fl, F2, and F3 files, with each file inserted into the root canal. The radiographic images were overlapped, and the Image J software was used to measure the distance between the rotary files' ends and the #15 K-file's end, characterizing the apical transportation. Data were analyzed by Repeated Measure ANOVA and by the SNK post hoc test (P<0.05). Results: It was verified that file size affected apical transportation significantly (P<0.001). The F3 file showed higher apical transportation than Fl and F2, while between these last files there was no difference. Conclusion: The undergraduate students produced lower apical transportation in curved canals when they did not use the F3 rotary file.

O objetivo deste estudo foi avaliar a resistência adesiva por meio do teste de microtração (µTBS) entre dois substratos (esmalte e dentina) considerando dois fatores em estudo: Tipo de resina [metacrilato (Filtek Supreme) ou silorano (Filtek LS)] e tempo de envelhecimento (24 horas ou 3 meses). Vinte molares humanos foram selecionados e divididos em dois grupos (n=10) considerando dois substratos dentários, esmalte e dentina. O esmalte e a dentina de cada dente foram divididos em duas metades, por meio de uma lamínula. Cada dente foi restaurado usando ambas as resinas testadas, seguindo instruções do fabricante. As amostras foram seccionadas, resultando em quatro palitos para cada tipo de resina. Metade dos palitos foi testada após 24h e o restante após três meses. O ensaio de microtração (µTBS) foi conduzido numa velocidade de 0,05 mm/s. Os dados foram analisados usando three-way ANOVA e teste de Tukey HSD (α= 0,05). Diferença significante foi encontrada para o fator resina e substratos (p<0,05), porém não houve influência do tempo de envelhecimento e interações entre fatores estudados. A resina à base de metacrilato apresentou maior resistência adesiva do que a silorano. A adesão em esmalte foi significativamente maior do que em dentina, independente da resina e do tempo de envelhecimento. Três meses de armazenamento não foram suficientes para causar degradação da interação adesiva, para ambas as resinas compostas, no esmalte e na dentina.

The aim of this study was to evaluate the microtensile bond strength (µTBS) of two substrates (enamel and dentin) considering two study factors: type of composite resin [methacrylate-based (Filtek Supreme) or silorane-based (Filtek LS)] and aging time (24 h or 3 months). Twenty human molars were selected and divided into 2 groups (n=10) considering two dental substrates, enamel or dentin. The enamel and dentin of each tooth was divided into two halves separated by a glass plate. Each tooth was restored using both tested composite resins following the manufacturer's instructions. The samples were sectioned, producing 4 sticks for each composite resin. Half of them were tested after 24 h and half after 3 months. µTBS testing was carried out at 0.05 mm/s. Data were analyzed by three-way ANOVA and Tukey's HSD tests at α=0.05. Significant differences between composite resins and substrates were found (p<0.05), but no statistically significant difference was found for aging time and interactions among study factors. The methacrylate-based resin showed higher µTBS than the silorane-based resin. The µTBS for enamel was significantly higher than for dentin, irrespective of the composite resin and storage time. Three months of storage was not sufficient time to cause degradation of the bonding interaction of either of the composite resins to enamel and dentin.

OBJETIVO: Estimou-se a prevalência e investigaram-se os fatores associados à vacinação contra hepatite B e os motivos para não vacinação entre cirurgiões-dentistas. MÉTODOS: Os dados foram coletados por meio de um questionário semiestruturado autoaplicável. Participaram cirurgiões-dentistas inscritos no Conselho Regional de Odontologia de Minas Gerais, subseção Montes Claros, que residiam e trabalhavam em clínicas odontológicas ou consultórios, com ou sem vínculo empregatício, no serviço privado ou público, em Montes Claros, MG. As variáveis associadas à vacinação contra hepatite B foram investigadas por meio de regressão logística não condicional. RESULTADOS: Foram identificados 333 trabalhadores elegíveis, 297 (89,2%) participaram e 283 responderam à questão sobre vacinação; destes, 258 (91,2%) realizaram o esquema vacinal de três doses e 25 (8,8%) não vacinaram ou não completaram o esquema vacinal, relatando como principal motivo a falta de informação (48%). As variáveis associadas com relato de vacinação, após ajuste para todas as outras, foram: consumo de tabaco (OR = 2,50; IC95% = 1,22-7,13), consumo de bebidas alcoólicas (OR = 2,99; IC95% = 1,16-7,74), satisfação com a profissão (OR = 4,62; IC95% = 1,50-8,25) e conhecimento sobre protocolo pós-exposição ocupacional (OR = 4,28; IC95% = 1,63-9,26). CONCLUSÕES: Verificou-se alta prevalência de vacinação completa, sendo maior entre os não fumantes, os que não consumiam bebidas alcoólicas, os mais satisfeitos com a profissão e os que conheciam um protocolo pós-exposição ocupacional. O estudo sugere que os comportamentos negligentes com a própria saúde se repetem. Há necessidade de campanhas educativas sobre a transmissão da hepatite B, contribuindo para o controle e erradicação dessa grave infecção.

OBJECTIVE: We calculated the prevalence and studied the factors associated with hepatitis B vaccination. Reasons for non-vaccination among dentists were investigated. METHODS: A cross-sectional study was performed in Montes Claros, Minas Gerais, from 2007 to 2008, to assess hepatitis B vaccination among practicing dental surgeons. Variables were evaluated using a previously tested structured questionnaire. Data underwent descriptive analysis. Non-conditional logistic regression was used to determine the variables associated with hepatitis B vaccination (p < 0.05). RESULTS: There were 333 subjects eligible for the study, 297 (89.2%) participated, and 283 answered the question about vaccination; of these, 258 (91.2%) completed the three-dose schedule vaccination and 25 (8.8%) were not vaccinated or did not complete the vaccination schedule. Lack of information (48%) was stated as the main reason for not being vaccinated. Variables associated with vaccination were: tobacco use (OR = 2.50; IC95% = 1.22-7.13), alcohol consumption (OR = 2.99; IC95% = 1.16-7.74), satisfaction with the profession (OR = 4.62; IC95% = 1.50-8.25) and knowledge on the post-exposure management protocol (OR = 4.28; IC95% = 1.63-9.26). CONCLUSIONS: We found a high prevalence of complete vaccination among dentists in Montes Claros. It is higher among professionals who do not use tobacco and alcohol, are more satisfied with their profession and know the protocol after occupational exposure. The study suggests that the lack of information is the main reason for not being vaccinated.

OBJETIVO: Estimou-se a prevalência e investigaram-se os fatores associados à vacinação contra hepatite B e os motivos para não vacinação entre cirurgiões-dentistas. MÉTODOS: Os dados foram coletados por meio de um questionário semiestruturado autoaplicável. Participaram cirurgiões-dentistas inscritos no Conselho Regional de Odontologia de Minas Gerais, subseção Montes Claros, que residiam e trabalhavam em clínicas odontológicas ou consultórios, com ou sem vínculo empregatício, no serviço privado ou público, em Montes Claros, MG. As variáveis associadas à vacinação contra hepatite B foram investigadas por meio de regressão logística não condicional. RESULTADOS: Foram identificados 333 trabalhadores elegíveis, 297 (89,2%) participaram e 283 responderam à questão sobre vacinação; destes, 258 (91,2%) realizaram o esquema vacinal de três doses e 25 (8,8%) não vacinaram ou não completaram o esquema vacinal, relatando como principal motivo a falta de informação (48%). As variáveis associadas com relato de vacinação, após ajuste para todas as outras, foram: consumo de tabaco (OR = 2,50; IC95% = 1,22-7,13), consumo de bebidas alcoólicas (OR = 2,99; IC95% = 1,16-7,74), satisfação com a profissão (OR = 4,62; IC95% = 1,50-8,25) e conhecimento sobre protocolo pós-exposição ocupacional (OR = 4,28; IC95% = 1,63-9,26). CONCLUSÕES: Verificou-se alta prevalência de vacinação completa, sendo maior entre os não fumantes, os que não consumiam bebidas alcoólicas, os mais satisfeitos com a profissão e os que conheciam um protocolo pós-exposição ocupacional. O estudo sugere que os comportamentos negligentes com a própria saúde se repetem. Há necessidade de campanhas educativas sobre a transmissão da hepatite B, contribuindo para o controle e erradicação dessa grave infecção.

OBJECTIVE: We calculated the prevalence and studied the factors associated with hepatitis B vaccination. Reasons for non-vaccination among dentists were investigated. METHODS: A cross-sectional study was performed in Montes Claros, Minas Gerais, from 2007 to 2008, to assess hepatitis B vaccination among practicing dental surgeons. Variables were evaluated using a previously tested structured questionnaire. Data underwent descriptive analysis. Non-conditional logistic regression was used to determine the variables associated with hepatitis B vaccination (p < 0.05). RESULTS: There were 333 subjects eligible for the study, 297 (89.2%) participated, and 283 answered the question about vaccination; of these, 258 (91.2%) completed the three-dose schedule vaccination and 25 (8.8%) were not vaccinated or did not complete the vaccination schedule. Lack of information (48%) was stated as the main reason for not being vaccinated. Variables associated with vaccination were: tobacco use (OR = 2.50; IC95% = 1.22-7.13), alcohol consumption (OR = 2.99; IC95% = 1.16-7.74), satisfaction with the profession (OR = 4.62; IC95% = 1.50-8.25) and knowledge on the post-exposure management protocol (OR = 4.28; IC95% = 1.63-9.26). CONCLUSIONS: We found a high prevalence of complete vaccination among dentists in Montes Claros. It is higher among professionals who do not use tobacco and alcohol, are more satisfied with their profession and know the protocol after occupational exposure. The study suggests that the lack of information is the main reason for not being vaccinated.

OBJETIVO: Identificar os fatores associados à autopercepção da saúde bucal entre idosos brasileiros. MÉTODOS: Utilizaram-se dados do Projeto SB Brasil, realizado em 20022003. Foi examinada e entrevistada amostra probabilística de 5.349 idosos de 65 a 74 anos agrupados em dentados e edentados. A variável dependente foi autopercepção da condição de saúde bucal e as independentes foram: local de moradia, características individuais, comportamentos relacionados à saúde, condições objetivas de saúde e condições subjetivas relacionadas à saúde. Foram conduzidas análises descritivas e análises de regressão linear múltipla hierárquica. RESULTADOS: Nos dois grupos a autopercepção da saúde bucal foi considerada positiva, apesar das precárias condições de saúde bucal entre os idosos. No modelo final, o local de moradia e as características individuais pouco contribuíram para explicar a variabilidade da autopercepção. Entre dentados, o uso de serviços odontológicos esteve associado ao desfecho, e as condições objetivas e subjetivas se mostraram associadas nos dois grupos. Entre dentados e edentados, o R² para o ambiente externo foi de 0,00; com o acréscimo das características individuais, respectivamente, 0,05 e 0,02; incluindo o comportamento relacionado à saúde, 0,06 e 0,03; acrescentando as condições objetivas de saúde, 0,11 e 0,04; adicionando as condições subjetivas relacionadas à saúde foram 0,50 e 0,43. Foi possível explicar 50% da variabilidade da autopercepção entre dentados e 43% entre edentados. CONCLUSÕES: Os principais fatores associados à autopercepção da saúde bucal como positiva nos dois grupos foram a autopercepção da aparência como ótima seguida pela autopercepção da mastigação como positiva. O terceiro fator associado, entre dentados, foi o relato de nenhuma necessidade de tratamento odontológico e, entre edentados, a autopercepção da fala.

OBJECTIVE: To identify factors associated with self-perceived oral health among Brazilian elderly individuals. METHODS: Data from the Projeto SB Brasil (Brazilian Oral Health Project), conducted in 2002-2003, were used. A probabilistic sample of 5,349 elderly individuals, aged between 65 and 74 years, was analyzed, interviewed and subsequently grouped into dentate and edentate individuals. The dependent variable was self-perceived oral health condition, while independent variables were as follows: place of residence, individual characteristics, health-related behavior, objective health conditions and subjective health conditions. Descriptive and hierarchical multiple linear regression analyses were performed. RESULTS: In both groups, self-perceived oral health was considered positive, despite the poor oral health conditions found among the elderly. In the final model, place of residence and individual characteristics contributed little to explain the variability of self-perception. The use of dental services was associated with the outcome in dentate individuals, while objective and subjective conditions were associated in both groups. Among dentate and edentate individuals, R² for the external environment was 0.00; with the inclusion of individual characteristics, 0.05 and 0.02, respectively; with the inclusion of health-related behavior, 0.06 and 0.03, respectively; with the inclusion of objective health conditions, 0.11 and 0.04 respectively; and with the inclusion of subjective health conditions, 0.50 and 0.43, respectively. It was possible to explain 50% of the variability of self-perception in dentate individuals, and 43% in edentate ones. CONCLUSIONS: The main factors associated with self-perceived oral health in both groups were excellent self-perceived appearance, followed by positive self-perceived mastication. The third associated factor was reporting no need for dental treatment in dentate individuals, and self-perceived speech in edentate ones.

OBJETIVO: Identificar los factores asociados a la autopercepción de la salud bucal entre ancianos brasileños. MÉTODOS: Se utilizaron datos del Proyecto SB Brasil, realizado en 2002-2003. Fue examinada y entrevistada muestra probabilística de 5.349 ancianos de 65 a 74 años agrupados en dentados y edentados. La variable dependiente fue autopercepción de la condición de salud bucal y las independientes fueron: lugar de residencia, características individuales, comportamientos relacionados con la salud, condiciones objetivas de salud y condiciones subjetivas relacionadas con la salud. Fueron conducidas análisis descriptivos y análisis de regresión linear múltiple jerárquica. RESULTADOS: En los dos grupos la autopercepción de la salud fue considerada positiva, a pesar de precarias condiciones de salud bucal entre los ancianos. En el modelo final, el lugar de residencia y las características individuales poco contribuyeron para explicar la variabilidad de la autopercepción. Entre dentados, el uso de servicios odontológicos estuvieron asociados al resultado y las condiciones objetivas y subjetivas se muestran asociadas en los dos grupos. Entre dentados y edentados, el R2 para el ambiente externo, fue de 0,00; adicionando las características individuales, respectivamente, 0,05 y 0,02; incluyendo el comportamiento relacionado con la salud, 0,06 y 0,03; considerando además las condiciones objetivas de salud, 0,11 y 0,04; adicionando las condiciones subjetivas relacionadas con la salud fueron 0,50 y 0,43. Fue posible explicar 50% de la variabilidad de la autopercepción, entre dentados y 43% entre edentados. CONCLUSIONES: Los factores asociados a la autopercepción de la salud bucal en los dos grupos fueron la autopercepción de la apariencia como óptima seguida por la autopercepción de la masticación positiva. El tercer factor asociado, entre dentados, fue el relato de ninguna necesidad de tratamiento odontológico y entre edentados la autopercepción del habla.

OBJETIVO: Identificar os fatores associados à autopercepção da saúde bucal entre idosos brasileiros. MÉTODOS: Utilizaram-se dados do Projeto SB Brasil, realizado em 20022003. Foi examinada e entrevistada amostra probabilística de 5.349 idosos de 65 a 74 anos agrupados em dentados e edentados. A variável dependente foi autopercepção da condição de saúde bucal e as independentes foram: local de moradia, características individuais, comportamentos relacionados à saúde, condições objetivas de saúde e condições subjetivas relacionadas à saúde. Foram conduzidas análises descritivas e análises de regressão linear múltipla hierárquica. RESULTADOS: Nos dois grupos a autopercepção da saúde bucal foi considerada positiva, apesar das precárias condições de saúde bucal entre os idosos. No modelo final, o local de moradia e as características individuais pouco contribuíram para explicar a variabilidade da autopercepção. Entre dentados, o uso de serviços odontológicos esteve associado ao desfecho, e as condições objetivas e subjetivas se mostraram associadas nos dois grupos. Entre dentados e edentados, o R² para o ambiente externo foi de 0,00; com o acréscimo das características individuais, respectivamente, 0,05 e 0,02; incluindo o comportamento relacionado à saúde, 0,06 e 0,03; acrescentando as condições objetivas de saúde, 0,11 e 0,04; adicionando as condições subjetivas relacionadas à saúde foram 0,50 e 0,43. Foi possível explicar 50% da variabilidade da autopercepção entre dentados e 43% entre edentados. CONCLUSÕES: Os principais fatores associados à autopercepção da saúde bucal como positiva nos dois grupos foram a autopercepção da aparência como ótima seguida pela autopercepção da mastigação como positiva. O terceiro fator associado, entre dentados, foi o relato de nenhuma necessidade de tratamento odontológico e, entre edentados, a autopercepção da fala.

OBJECTIVE: To identify factors associated with self-perceived oral health among Brazilian elderly individuals. METHODS: Data from the Projeto SB Brasil (Brazilian Oral Health Project), conducted in 2002-2003, were used. A probabilistic sample of 5,349 elderly individuals, aged between 65 and 74 years, was analyzed, interviewed and subsequently grouped into dentate and edentate individuals. The dependent variable was self-perceived oral health condition, while independent variables were as follows: place of residence, individual characteristics, health-related behavior, objective health conditions and subjective health conditions. Descriptive and hierarchical multiple linear regression analyses were performed. RESULTS: In both groups, self-perceived oral health was considered positive, despite the poor oral health conditions found among the elderly. In the final model, place of residence and individual characteristics contributed little to explain the variability of self-perception. The use of dental services was associated with the outcome in dentate individuals, while objective and subjective conditions were associated in both groups. Among dentate and edentate individuals, R² for the external environment was 0.00; with the inclusion of individual characteristics, 0.05 and 0.02, respectively; with the inclusion of health-related behavior, 0.06 and 0.03, respectively; with the inclusion of objective health conditions, 0.11 and 0.04 respectively; and with the inclusion of subjective health conditions, 0.50 and 0.43, respectively. It was possible to explain 50% of the variability of self-perception in dentate individuals, and 43% in edentate ones. CONCLUSIONS: The main factors associated with self-perceived oral health in both groups were excellent self-perceived appearance, followed by positive self-perceived mastication. The third associated factor was reporting no need for dental treatment in dentate individuals, and self-perceived speech in edentate ones.

OBJETIVO: Identificar los factores asociados a la autopercepción de la salud bucal entre ancianos brasileños. MÉTODOS: Se utilizaron datos del Proyecto SB Brasil, realizado en 2002-2003. Fue examinada y entrevistada muestra probabilística de 5.349 ancianos de 65 a 74 años agrupados en dentados y edentados. La variable dependiente fue autopercepción de la condición de salud bucal y las independientes fueron: lugar de residencia, características individuales, comportamientos relacionados con la salud, condiciones objetivas de salud y condiciones subjetivas relacionadas con la salud. Fueron conducidas análisis descriptivos y análisis de regresión linear múltiple jerárquica. RESULTADOS: En los dos grupos la autopercepción de la salud fue considerada positiva, a pesar de precarias condiciones de salud bucal entre los ancianos. En el modelo final, el lugar de residencia y las características individuales poco contribuyeron para explicar la variabilidad de la autopercepción. Entre dentados, el uso de servicios odontológicos estuvieron asociados al resultado y las condiciones objetivas y subjetivas se muestran asociadas en los dos grupos. Entre dentados y edentados, el R2 para el ambiente externo, fue de 0,00; adicionando las características individuales, respectivamente, 0,05 y 0,02; incluyendo el comportamiento relacionado con la salud, 0,06 y 0,03; considerando además las condiciones objetivas de salud, 0,11 y 0,04; adicionando las condiciones subjetivas relacionadas con la salud fueron 0,50 y 0,43. Fue posible explicar 50% de la variabilidad de la autopercepción, entre dentados y 43% entre edentados. CONCLUSIONES: Los factores asociados a la autopercepción de la salud bucal en los dos grupos fueron la autopercepción de la apariencia como óptima seguida por la autopercepción de la masticación positiva. El tercer factor asociado, entre dentados, fue el relato de ninguna necesidad de tratamiento odontológico y entre edentados la autopercepción del habla.

OBJETIVO: Analisar a adesão a protocolo pós-exposição ocupacional a acidentes e os fatores relacionados à adesão entre cirurgiões-dentistas. MÉTODOS: Estudo transversal realizado em Montes Claros, MG, de 2007 a 2008, com cirurgiões-dentistas em atividade clínica com relato de ocorrência de acidentes com instrumentos perfurocortantes no seu exercício profissional. As variáveis referentes à caracterização do dentista, condições de trabalho dos dentistas, caracterização da clientela atendida, características dos acidentes com instrumentos perfurocortantes sofridos pelos dentistas e condutas pós-acidentes foram avaliadas por meio de um questionário estruturado, previamente testado. Os dados foram submetidos à análise descritiva e ao teste qui-quadrado (p < 0,05). RESULTADOS: Um total de 241 dentistas (89,2%) respondeu ao questionário. A adesão ao protocolo pós-exposição ocupacional foi relatada por 51,5%. A maioria dos profissionais relatou a detecção de sangue no momento do acidente. As brocas foram os instrumentos mais envolvidos nos acidentes e o dedo a parte do corpo mais acometida. Verificou-se maior prevalência de adesão ao protocolo pós-exposição entre aqueles com maior renda mensal (OR = 2,42, IC 95%: 1,03;5,71), atualização nos últimos dois anos (OR = 2,16, IC 95%: 1,09;4,27) e que realizavam pausa por jornada de quatro horas (OR = 1,23, IC 95%: 1,23;4,92). Os cirurgiões-dentistas que atendiam crianças (OR = 0,50, IC 95%: 0,27;0,93) e indivíduos de classe socioeconômica média, média alta e alta (OR = 0,54, IC 95%: 0,31;0,95) apresentaram menor prevalência de adesão ao protocolo pós-exposição ocupacional. A freqüência de adesão a um protocolo pós-exposição foi significativamente maior entre os indivíduos que seguiam as condutas descritas em protocolos pós-exposição. CONCLUSÕES: Há baixa adesão ao protocolo pós-exposição ocupacional entre os dentistas, influenciada pelo conhecimento e renda mensal dos profissionais, pela realização de pausas, grupo etário e classe socioeconômica da clientela atendida.

OBJECTIVE: To analyze the compliance with occupational post-exposure protocol for accidents and factors associated with compliance among dental surgeons. METHODS: A cross-sectional study was performed in the municipality of Montes Claros, Southeastern Brazil, from 2007 to 2008, with accident reports from needles and sharp instruments among practicing dental surgeons. Variables describing the dentists' characteristics, work conditions, clients, injuries from needles and sharp instruments and post-accident actions were evaluated by means of a previously tested, structured questionnaire. The data underwent descriptive analysis and chi-square testing (p<0.05). RESULTS: A total of 241 dentists (89.2%) answered the questionnaire. Compliance with occupational post-exposure protocol was reported by 51.5%. The majority of the professionals reported seeing blood at the time of the accident. Burs were the instrument most often involved in accidents, and the finger was the most injured body part. Compliance with a post-exposure protocol was more prevalent among those with greater monthly income (OR=2.42; 95% CI=1.03;5.71), continuing education in the last two years (OR=2.16; 95% CI=1.09;4.27) and who took regular breaks every four hours (OR=1.23; 95% CI=1.23;4.92). Dental surgeons who attended to children (OR=0.50; 95%CI=0.27;0.93) and to individuals from the middle, middle-high and high socioeconomic classes (OR=0.54, 95% CI=0.31;0.95) showed less compliance with the occupational post-exposure protocol. The frequency of compliance to a post-exposure protocol was significantly greater among individuals who followed the actions described in post-exposure protocols. CONCLUSIONS: There is low compliance with occupational post-exposure protocols among dentists, which is influenced by the knowledge and monthly income of professionals, by taking regular breaks, by age group and the socioeconomic class of the clientele.

OBJETIVO: Analizar la adhesión a protocolo post exposición ocupacional a accidentes y los factores relacionados a la adhesión entre cirujanos dentistas. MÉTODOS: Estudio transversal realizado en Montes Claros, Sureste de Brasil, de 2007 a 2008, con cirujanos dentistas en actividad clínica con relato de ocurrencia de accidentes con instrumentos perfurocortantes en el ejercicio profesional. Las variables relacionadas con la caracterización del dentista, condiciones de trabajo de los dentistas, caracterización de la clientela atendida, características de los accidentes con instrumentos perfurocortantes sufridos por los dentistas y conductas post accidentes fueron evaluadas por medio de un cuestionario estructurado, previamente testado. Los datos fueron sometidos al análisis descriptivo y a la prueba de chi-cuadrado (p<0,05). RESULTADOS: Un total de 241 dentistas (89,2%) respondió el cuestionario. La adhesión al protocolo post exposición ocupacional fue relatada por 51,5%. La mayoría de los profesionales mencionó la detección de sangre en el momento del accidente. Las brocas fueron los instrumentos más involucrados en los accidentes y el dedo la parte del cuerpo más afectada. Se verificó mayor prevalencia de adhesión al protocolo post exposición entre aquellos con mayor renta mensual (OR=2,42, IC 95%: 1,03;5,71), actualización en los últimos dos años (OR=2,16, IC 95%: 1,09;4,27) y que realizaban pausa por jornada de cuatro horas (OR=1,23, IC 95%: 1,23;4,92). Los cirujanos dentistas que atendían niños (OR=0,50, IC 95%: 0,27;0,93) e individuos de clase socioeconómica media, media alta y alta (OR=0,54, IC 95%: 0,31;0,95) presentaron menor prevalencia de adhesión al protocolo post exposición ocupacional. La frecuencia de adhesión a un protocolo post exposición fue significativamente mayor entre los individuos que seguían las conductas descritas en protocolos post exposición. CONCLUSIONES: Hay baja adhesión al protocolo post exposición ocupacional entre los dentistas, influenciada por el conocimiento y renta mensual de los profesionales, por la realización de pausas, grupo de edad y clase socioeconómica de la clientela atendida.

OBJETIVO: Analisar a adesão a protocolo pós-exposição ocupacional a acidentes e os fatores relacionados à adesão entre cirurgiões-dentistas. MÉTODOS: Estudo transversal realizado em Montes Claros, MG, de 2007 a 2008, com cirurgiões-dentistas em atividade clínica com relato de ocorrência de acidentes com instrumentos perfurocortantes no seu exercício profissional. As variáveis referentes à caracterização do dentista, condições de trabalho dos dentistas, caracterização da clientela atendida, características dos acidentes com instrumentos perfurocortantes sofridos pelos dentistas e condutas pós-acidentes foram avaliadas por meio de um questionário estruturado, previamente testado. Os dados foram submetidos à análise descritiva e ao teste qui-quadrado (p < 0,05). RESULTADOS: Um total de 241 dentistas (89,2%) respondeu ao questionário. A adesão ao protocolo pós-exposição ocupacional foi relatada por 51,5%. A maioria dos profissionais relatou a detecção de sangue no momento do acidente. As brocas foram os instrumentos mais envolvidos nos acidentes e o dedo a parte do corpo mais acometida. Verificou-se maior prevalência de adesão ao protocolo pós-exposição entre aqueles com maior renda mensal (OR = 2,42, IC 95%: 1,03;5,71), atualização nos últimos dois anos (OR = 2,16, IC 95%: 1,09;4,27) e que realizavam pausa por jornada de quatro horas (OR = 1,23, IC 95%: 1,23;4,92). Os cirurgiões-dentistas que atendiam crianças (OR = 0,50, IC 95%: 0,27;0,93) e indivíduos de classe socioeconômica média, média alta e alta (OR = 0,54, IC 95%: 0,31;0,95) apresentaram menor prevalência de adesão ao protocolo pós-exposição ocupacional. A freqüência de adesão a um protocolo pós-exposição foi significativamente maior entre os indivíduos que seguiam as condutas descritas em protocolos pós-exposição. CONCLUSÕES: Há baixa adesão ao protocolo pós-exposição ocupacional entre os dentistas, influenciada pelo conhecimento e renda mensal dos profissionais, pela realização de pausas, grupo etário e classe socioeconômica da clientela atendida.

OBJECTIVE: To analyze the compliance with occupational post-exposure protocol for accidents and factors associated with compliance among dental surgeons. METHODS: A cross-sectional study was performed in the municipality of Montes Claros, Southeastern Brazil, from 2007 to 2008, with accident reports from needles and sharp instruments among practicing dental surgeons. Variables describing the dentists' characteristics, work conditions, clients, injuries from needles and sharp instruments and post-accident actions were evaluated by means of a previously tested, structured questionnaire. The data underwent descriptive analysis and chi-square testing (p<0.05). RESULTS: A total of 241 dentists (89.2%) answered the questionnaire. Compliance with occupational post-exposure protocol was reported by 51.5%. The majority of the professionals reported seeing blood at the time of the accident. Burs were the instrument most often involved in accidents, and the finger was the most injured body part. Compliance with a post-exposure protocol was more prevalent among those with greater monthly income (OR=2.42; 95% CI=1.03;5.71), continuing education in the last two years (OR=2.16; 95% CI=1.09;4.27) and who took regular breaks every four hours (OR=1.23; 95% CI=1.23;4.92). Dental surgeons who attended to children (OR=0.50; 95%CI=0.27;0.93) and to individuals from the middle, middle-high and high socioeconomic classes (OR=0.54, 95% CI=0.31;0.95) showed less compliance with the occupational post-exposure protocol. The frequency of compliance to a post-exposure protocol was significantly greater among individuals who followed the actions described in post-exposure protocols. CONCLUSIONS: There is low compliance with occupational post-exposure protocols among dentists, which is influenced by the knowledge and monthly income of professionals, by taking regular breaks, by age group and the socioeconomic class of the clientele.

OBJETIVO: Analizar la adhesión a protocolo post exposición ocupacional a accidentes y los factores relacionados a la adhesión entre cirujanos dentistas. MÉTODOS: Estudio transversal realizado en Montes Claros, Sureste de Brasil, de 2007 a 2008, con cirujanos dentistas en actividad clínica con relato de ocurrencia de accidentes con instrumentos perfurocortantes en el ejercicio profesional. Las variables relacionadas con la caracterización del dentista, condiciones de trabajo de los dentistas, caracterización de la clientela atendida, características de los accidentes con instrumentos perfurocortantes sufridos por los dentistas y conductas post accidentes fueron evaluadas por medio de un cuestionario estructurado, previamente testado. Los datos fueron sometidos al análisis descriptivo y a la prueba de chi-cuadrado (p<0,05). RESULTADOS: Un total de 241 dentistas (89,2%) respondió el cuestionario. La adhesión al protocolo post exposición ocupacional fue relatada por 51,5%. La mayoría de los profesionales mencionó la detección de sangre en el momento del accidente. Las brocas fueron los instrumentos más involucrados en los accidentes y el dedo la parte del cuerpo más afectada. Se verificó mayor prevalencia de adhesión al protocolo post exposición entre aquellos con mayor renta mensual (OR=2,42, IC 95%: 1,03;5,71), actualización en los últimos dos años (OR=2,16, IC 95%: 1,09;4,27) y que realizaban pausa por jornada de cuatro horas (OR=1,23, IC 95%: 1,23;4,92). Los cirujanos dentistas que atendían niños (OR=0,50, IC 95%: 0,27;0,93) e individuos de clase socioeconómica media, media alta y alta (OR=0,54, IC 95%: 0,31;0,95) presentaron menor prevalencia de adhesión al protocolo post exposición ocupacional. La frecuencia de adhesión a un protocolo post exposición fue significativamente mayor entre los individuos que seguían las conductas descritas en protocolos post exposición. CONCLUSIONES: Hay baja adhesión al protocolo post exposición ocupacional entre los dentistas, influenciada por el conocimiento y renta mensual de los profesionales, por la realización de pausas, grupo de edad y clase socioeconómica de la clientela atendida.