Comparison of two methods of visual magnification for removal of adhesive flash during bracket placement using two types of orthodontic bonding agents

ABSTRACT Objective: This study aimed to evaluate the effectiveness of two methods of visual magnification (operating microscope and light head magnifying glass) for removal of composite flash around orthodontic metal brackets. Material and Methods: Brackets were bonded in the center of the clinical crown of sixty well-preserved human premolars. Half of the sample was bonded with conventional Transbond XT (3M Unitek TM, USA), whereas the other half was bonded with Transbond TM Plus Color Change (3M Unitek TM, USA). For each type of composite, the choice of method to remove the flash was determined by randomly distributing the teeth into the following subgroups: A (removal by naked eye, n = 10), B (removal with the aid of light head magnifying glass, under 4x magnification, n = 10), and C (removal with the aid of an operating microscope, under 40x magnification, n = 10). Brackets were debonded and teeth taken to a scanning electron microscope (SS-x-550, Shimadzu, Japan) for visualization of their buccal surface. Quantification of composite flash was performed with Image Pro Plus software, and values were compared by Kruskal-Wallis test and Dunn’s post-hoc test at 5% significance level. Results: Removal of pigmented orthodontic adhesive with the aid of light head magnifying glass proved, in general, to be advantageous in comparison to all other methods. Conclusion: There was no advantage in using Transbond TM Plus Color Change alone. Further studies are necessary to draw a more definitive conclusion in regards to the benefits of using an operating microscope.

RESUMO Objetivo: este estudo teve o objetivo de avaliar a eficácia de dois métodos de magnificação visual (microscópio cirúrgico e lupa de pala) para remoção da resina residual em torno de braquetes ortodônticos metálicos. Material e Métodos: os braquetes foram colados no centro da coroa clínica de 60 pré-molares humanos bem preservados. Metade da amostra foi colada com Transbond XT convencional (3M UnitekTM, EUA), enquanto a outra metade foi colada com TransbondTM Plus Color Change (3M-UnitekTM, EUA). Para cada tipo de resina, a escolha do método para remover o resíduo foi determinada por meio da distribuição aleatória dos dentes nos seguintes subgrupos: A (remoção a olho nu, n = 10), B (remoção com a ajuda de lupa de pala, sob uma ampliação de 4x, n = 10) e C (remoção com auxílio de um microscópio cirúrgico, sob uma ampliação de 40x, n = 10). Os braquetes foram descolados e os dentes, levados a um microscópio eletrônico de varredura (SS-X-550, Shimadzu, Japão) para visualização de sua superfície vestibular. A quantificação da resina residual foi realizada por meio do software Image Pro Plus, onde os valores foram comparados utilizando-se o teste de Kruskal-Wallis e o teste post-hoc de Dunn, ao nível de significância de 5%. Resultados: a remoção da resina ortodôntica pigmentada com o auxílio da lente de aumento de pala provou, em geral, ser mais vantajosa, em comparação aos outros métodos testados. Conclusão: não houve vantagem em se usar a TransbondTM Plus Color Change sozinha. Estudos adicionais são necessários para se chegar a uma conclusão definitiva sobre os benefícios da utilização de microscópio cirúrgico.

Comparison of two methods of visual magnification for removal of adhesive flash during bracket placement using two types of orthodontic bonding agents.

OBJECTIVE:: This study aimed to evaluate the effectiveness of two methods of visual magnification (operating microscope and light head magnifying glass) for removal of composite flash around orthodontic metal brackets. MATERIAL AND METHODS:: Brackets were bonded in the center of the clinical crown of sixty well-preserved human premolars. Half of the sample was bonded with conventional Transbond XT (3M Unitek TM, USA), whereas the other half was bonded with Transbond TM Plus Color Change (3M Unitek TM, USA). For each type of composite, the choice of method to remove the flash was determined by randomly distributing the teeth into the following subgroups: A (removal by naked eye, n = 10), B (removal with the aid of light head magnifying glass, under 4x magnification, n = 10), and C (removal with the aid of an operating microscope, under 40x magnification, n = 10). Brackets were debonded and teeth taken to a scanning electron microscope (SS-x-550, Shimadzu, Japan) for visualization of their buccal surface. Quantification of composite flash was performed with Image Pro Plus software, and values were compared by Kruskal-Wallis test and Dunn's post-hoc test at 5% significance level. RESULTS:: Removal of pigmented orthodontic adhesive with the aid of light head magnifying glass proved, in general, to be advantageous in comparison to all other methods. CONCLUSION:: There was no advantage in using Transbond TM Plus Color Change alone. Further studies are necessary to draw a more definitive conclusion in regards to the benefits of using an operating microscope.

Can shielded brackets reduce mucosa alteration and increase comfort perception in orthodontic patients in the first 3 days of treatment? A single-blind randomized controlled trial.

INTRODUCTION: Orthodontic patients can experience pain and discomfort on the oral mucosa from trauma caused by friction with the brackets and the wires. In this split-mouth design, single-blind randomized controlled trial, we aimed to investigate whether brackets with a self-snapping customized plastic shield would induce less mucosa alteration and discomfort than those without the shield. METHODS: The overall sample comprised 42 patients (22 female, 20 male) from a government-funded orthodontic practice, with a mean age of 16.7 years. Eligibility criteria included, among others, no history of mouth ulcers or systemic diseases. Customized shields for the maxillary and mandibular brackets were fabricated and inserted on one side of the mouth. The null hypothesis was that bracket shielding would have no advantage. The primary outcomes were mucosal and discomfort assessments. As the secondary outcome, the numbers of spontaneous detachments of the shields were reported. Treatment allocation was mainly implemented using a random number table for selection of the intervention side. Only the raters in charge of assessing the oral mucosa were blinded to the side of the mouth where the shields had been placed. The mucosa was assessed by 3 calibrated raters at the following time points: immediately before bracket placement (baseline assessment, T0), 3 days after delivering the shields (direct assessment of intervention, T1), and 4 days after removal of the shields (indirect assessment of intervention, T2). The raters used a newly devised yardstick in which the higher the score, the more severe the alteration. Discomfort was assessed at T1 and T2 using a visual analog scale. The Mann-Whitney U test was performed at the 5% level of significance. RESULTS: Of 60 patients, 42 were eligible, and 35 were randomly selected to have one side of the mouth receive the intervention. Two patients discontinued the intervention at T1, and 5 stopped at T2. Seven additional patients were recruited and completed all time points. Thus, 42 patients participated at T0, 40 at T1, and 35 at T2. Thirty-five patients participated at all time points. At T1, no statistically significant difference in terms of mucosa alteration was observed between the 2 sides (median of all differences [MD], 0.0; 95% CI, 0.0-1.0; P = 0.11). The same occurred at T2 (MD, 0.0; 95% CI, 0.0-0.0; P = 1.00). The comfort level was statistically higher at T1 on the shielded side (MD, 14.0; 95% CI, 1.0-36.0; P = 0.04), whereas no difference was observed at T2 (MD, 0.0; 95% CI, 0.0-1.0, P = 0.81). No serious harm was observed. CONCLUSIONS: The customized bracket shields were effective in reducing discomfort during the first 3 days of orthodontic treatment despite no significant difference in terms of visible mucosa alteration. REGISTRATION: This trial was not registered. PROTOCOL: The protocol was not published before trial commencement. FUNDING: Expenses for the fabrication of the shields were covered by the main author (L.P.B.P.). Orthodontic materials were from the Center for Dental Specialties in Cajazeiras, Brazil.

O efeito da alteração da inclinação da posição natural da cabeça em 7º sobre medidas cefalométricas / The effect of altering the natural head position in 7º on cephalometric measurements

O objetivo do presente estudo foi avaliar as alterações das medidas angulares e lineares mais comumente utilizadas em cefalometria, quando a posição natural da cabeça (PNC) é modificada durante a tomada da telerradiografia em norma lateral (acréscimo e decréscimo de 7° em relação à PNC). Para tanto, foram analisadas 90 telerradiografias de 30 pacientes do sexo feminino (média de idade de 22,7 anos). Em cada paciente, foram obtidas três telerradiografias em um único momento: PNC, PNC acrescida de 7° e PNC com decréscimo de 7°. Os resultados apontaram alterações significativas para as medidas SN.VER, HF.VER e ângulo Z, porém, não foram observadas diferenças estatisticamente significantes para as demais grandezas: SNA, SNB, ANB, PP.GoGn, 1.PP, IMPA, 1.1, SN.GoGn, FMA, SN.PP, S-N, ENA-ENP, Co-Gn, Co-Go e Go-Gn. Sendo assim, concluiu-se que a inclinação da cabeça do paciente, dada pelo acréscimo ou decréscimo de 7° em relação à PNC, não apresenta interferência para as medidas cefalométricas aqui estudadas, salvo aquelas que levam em consideração a linha vertical verdadeira para sua construção...

The aim of the present study was to assess the alterations in angular and linear cephalometric measurements when modifying the natural head position (NHP) inclination to +7 or -7 degrees. Ninety cephalometric radiographs of 30 female patients (average of 22.7 years old) were obtained as follows: NHP, with +7 degrees and with -7 degrees. Statistically significant differences were observed for measurements SN.VER, HF.VER and Z angle. No influence was observed on all other measurements: SNA, SNB, ANB, PP.GoGn, 1. PP, IMPA, 1.1, SN.GoGn, FMA, SN.PP, S-N, ENA-ENP, Co-Gn, Co-Go and Go-Gn. It was concluded that tipping the head towards +7 or -7 degrees in relation to NHP has no interference to cephalometric measurements studied here, except those which use the true vertical line for its construction...

Longitudinal stability of rapid and slow maxillary expansion

OBJECTIVE: The aim of this retrospective study was to compare the longitudinal stability of two types of posterior crossbite correction: rapid maxillary expansion (RME) and slow maxillary expansion (SME). METHODS: Study casts of 90 adolescent patients were assessed for interdental width changes at three different periods: pretreatment (T1), post-treatment (T2) and at least, five years post-retention (T3). Three groups of 30 patients were established according to the treatment received to correct posterior crossbite: Group A (RME), group B (SME) and group C (control- Edgewise therapy only). After crossbite correction, all patients received fixed edgewise orthodontic appliances. Paired t-tests and one-way ANOVA were used to identify significant intra and intergroup changes, respectively (P < 0.05). RESULTS: Except for intercanine distance, all widths increased in groups A and B from T1 to T2. In the long-term, the amount of relapse was not different for groups A and B, except for 3-3 widths which showed greater decrease in group A. However, the percentage of clinically relapsed cases of posterior crossbite was similar for rapid and slow maxillary expansion. CONCLUSION: Rapid and slow maxillary expansion showed similar stability in the long-term. .

OBJETIVO: o objetivo desse estudo retrospectivo foi comparar a estabilidade em longo prazo em dois tipos de correção da mordida cruzada posterior, sendo a expansão rápida (ERM) e a expansão lenta da maxila (ELM). MÉTODOS: modelos de estudos de 90 pacientes adolescentes foram avaliados quanto às alterações na largura interdentária em três diferentes tempos: pré-tratamento (T1), pós-tratamento (T2) e pelo menos cinco anos pós-contenção (T3). Três grupos de 30 pacientes foram definidos de acordo com o tratamento realizado para a correção da mordida cruzada posterior: Grupo A (ERM), grupo B (ELM) e grupo C (controle - apenas tratamento com técnica Edgewise). Após correção da mordida cruzada, todos pacientes receberam aparelhos ortodônticos fixos corretivos Edgewise. Teste t pareado e análise de variância a um critério (ANOVA) foram realizados para identificar alterações significantes intra- e intergrupos, respectivamente (p < 0,05). RESULTADOS: exceto para a distância intercaninos, todas as larguras aumentaram nos grupos A e B de T1 para T2. Em longo prazo, a quantidade de recidiva não foi diferente para os grupos A e B, exceto para a largura 3-3, que apresentou uma maior diminuição no grupo A. Clinicamente, entretanto, a porcentagem de casos com recidivas da mordida cruzada posterior foi semelhante para expansões rápida e lenta da maxila. CONCLUSÃO: Expansões rápida e lenta da maxila apresentaram estabilidades semelhantes em longo prazo. .

Comparison of friction produced by two types of orthodontic bracket protectors.

INTRODUCTION: Fixed orthodontic appliances have been regarded as a common causative factor of oral lesions. To manage soft tissue discomfort, most orthodontists recommend using a small amount of utility wax over the brackets in order to alleviate trauma. This in vitro study aimed at evaluating friction generated by two types of bracket protectors (customized acetate protector [CAP] and temporary resin protector [TRP]) during the initial stages of orthodontic treatment. METHODS: An experimental model (test unit) was used to assess friction. In order to measure the friction produced in each test, the model was attached to a mechanical testing machine which simulated maxillary canines alignment. Intergroup comparison was carried out by one-way ANOVA with level of significance set at 5%. RESULTS: The friction presented by the TRP group was statistically higher than that of the control group at 6 mm. It was also higher than in the control and CAP groups in terms of maximum friction. CONCLUSIONS: The customized acetate protector (CAP) demonstrated not to interfere in friction between the wire and the orthodontic bracket slot.

Comparison of friction produced by two types of orthodontic bracket protectors

INTRODUCTION: Fixed orthodontic appliances have been regarded as a common causative factor of oral lesions. To manage soft tissue discomfort, most orthodontists recommend using a small amount of utility wax over the brackets in order to alleviate trauma. This in vitro study aimed at evaluating friction generated by two types of bracket protectors (customized acetate protector [CAP] and temporary resin protector [TRP]) during the initial stages of orthodontic treatment. METHODS: An experimental model (test unit) was used to assess friction. In order to measure the friction produced in each test, the model was attached to a mechanical testing machine which simulated maxillary canines alignment. Intergroup comparison was carried out by one-way ANOVA with level of significance set at 5%. RESULTS: The friction presented by the TRP group was statistically higher than that of the control group at 6 mm. It was also higher than in the control and CAP groups in terms of maximum friction. CONCLUSION: The customized acetate protector (CAP) demonstrated not to interfere in friction between the wire and the orthodontic bracket slot. .

INTRODUÇÃO: o aparelho ortodôntico fixo é considerado um fator causador de traumas na mucosa bucal. Com o intuito de controlar o desconforto no tecido mole, diversos ortodontistas recomendam a utilização de uma pequena quantidade de cera utilidade sobre os braquetes como forma de proteção. Esse estudo teve como objetivo avaliar, in vitro, o atrito gerado por dois tipos de protetores de braquetes (protetor de acetato e de resina - PPA e PRT) durante os estágios iniciais do tratamento ortodôntico. MÉTODOS: o atrito gerado pelos protetores no fio ortodôntico foi avaliado em unidades de teste de modelos experimentais. Esses modelos foram ligados a uma máquina de ensaios mecânicos que simulava o alinhamento do canino superior. A comparação intergrupos foi realizada pela ANOVA, com nível de significância de 5%. RESULTADOS: a fricção apresentada pelo grupo PRT foi estatisticamente maior do que a do grupo controle ao nível de 6mm. Para o atrito máximo, a média do grupo PRT foi estatisticamente maior do que a dos grupos controle e PPA. CONCLUSÃO: o protetor de acetato demonstrou não interferir no atrito entre o fio e a ranhura do braquete ortodôntico. .

Longitudinal stability of rapid and slow maxillary expansion.

OBJECTIVE: The aim of this retrospective study was to compare the longitudinal stability of two types of posterior crossbite correction: rapid maxillary expansion (RME) and slow maxillary expansion (SME). METHODS: Study casts of 90 adolescent patients were assessed for interdental width changes at three different periods: pretreatment (T1), post-treatment (T2) and at least, five years post-retention (T3). Three groups of 30 patients were established according to the treatment received to correct posterior crossbite: Group A (RME), group B (SME) and group C (control- Edgewise therapy only). After crossbite correction, all patients received fixed edgewise orthodontic appliances. Paired t-tests and one-way ANOVA were used to identify significant intra and intergroup changes, respectively (P < 0.05). RESULTS: Except for intercanine distance, all widths increased in groups A and B from T1 to T2. In the long-term, the amount of relapse was not different for groups A and B, except for 3-3 widths which showed greater decrease in group A. However, the percentage of clinically relapsed cases of posterior crossbite was similar for rapid and slow maxillary expansion. CONCLUSION: Rapid and slow maxillary expansion showed similar stability in the long-term.

A glimpse into the curricular format of comprehensive care clinics in Brazilian dental schools.

OBJECTIVE: This study aimed to describe some curricular aspects of comprehensive dental care clinics in Brazil. MATERIALS AND METHODS: An email survey was sent to all academic affairs deans of Brazilian undergraduate dental programmes. It contained questions regarding the (1) curricular format and (2) characteristics of comprehensive dental care clinics. RESULTS: Sixty-seven dental schools agreed to participate. It was observed that curricular changes have contributed to modify the structure of these clinics in 88.1% of the schools surveyed. The main alteration was related to an increase in credit hours and offer of this type of care at different levels of the dental curriculum. In 95.5% of the schools, clinical procedures were prioritized according to level of complexity. Inter-disciplinarity (37.3%) and teaching innovation (58.2%) were frequent challenges in the process of change. Progress in combining teaching and clinical services was reported by 50.8% of schools. In 32.8%, clinical procedures were still being performed intra-murally. CONCLUSIONS: Changes in the curriculum of Brazilian comprehensive dental care clinics were observed by this survey.

Desempenho de escolares com dislexia: programas de intervenção metalinguístico e de leitura / Performance of students with dyslexia in intervention programs: metalinguistics and reading

A dislexia é um distúrbio específico de aprendizagem de origem neurológica, resultante de um déficit no componente fonológico da linguagem. Este estudo visou verificar o desempenho de escolares com dislexia em programa de intervenção fonológica, programa de leitura e programa de intervenção fonológica e leitura em escolares com dislexia. Participaram deste estudo 60 disléxicos distribuídos em: GI (dez escolares com dislexia submetidos e dez escolares com dislexia não submetidos ao programa de intervenção fonológica), GII (dez escolares com dislexia submetidos e dez escolares com dislexia não submetidos ao programa de leitura), GIII (dez escolares com dislexia submetidos e dez escolares com dislexia não submetidos ao programa de intervenção fonológica e leitura). Foi realizado o programa de intervenção fonológica e leitura em três etapas: pré-testagem, treino, pós-testagem. Os resultados revelaram diferenças estatisticamente significantes entre os dois momentos de avaliação, revelando melhora nas habilidades cognitivo-linguísticas em situação de pós-testagem comparando-se a pré-testagem, demonstrando a eficácia dos três programas para escolares com dislexia. Concluiu-se que houve uma melhora do desempenho dos escolares com dislexia submetidos aos programas de intervenção, evidenciando a necessidade da instrução fonológica no contexto da alfabetização, pois isso auxiliaria os escolares a desenvolverem habilidades cognitivo-linguísticas para a aprendizagem da base alfabética do sistema de escrita do português brasileiro.

Dyslexia is specific learning disabilities, of neurological origin, resulted from a phonological deficit of language. This study aims to verify the performance of students with dyslexia in phonological intervention program, reading program, and phonological and reading remediation program in students with dyslexia. The participants of this study were 60 students who were divided as follows: GI (ten students with dyslexia submitted to phonological remediation program and ten students with dyslexia not submitted to phonological remediation program), GII (ten students with dyslexia submitted to reading program and ten students with dyslexia not submitted to reading program), GIII (ten students with dyslexia submitted to phonological and reading program and ten students with dyslexia not submitted to phonological and reading program). The phonological and reading remediation was applied in three phases: pretest, training, post-testing. The results showed significant statistical difference between two evaluation moments, revealed better performance in the cognitive-linguistic skills in post-test situation comparing to the pretest, showing the efficacy of the three remediation programs for students with dyslexia. The better performance of the students with dyslexia submitted to the remediation programs shows the necessity of phonological instruction or phonological instruction with reading to be offered in the literacy context, once this will help students to develop cognitive-linguistic skills to learn the alphabetic basis of the Brazilian Portuguese writing system.

Desempenho de escolares com dislexia: programas de intervenção metalinguístico e de leitura / Performance of students with dyslexia in intervention programs: metalinguistics and reading

A dislexia é um distúrbio específico de aprendizagem de origem neurológica, resultante de um déficit no componente fonológico da linguagem. Este estudo visou verificar o desempenho de escolares com dislexia em programa de intervenção fonológica, programa de leitura e programa de intervenção fonológica e leitura em escolares com dislexia. Participaram deste estudo 60 disléxicos distribuídos em: GI (dez escolares com dislexia submetidos e dez escolares com dislexia não submetidos ao programa de intervenção fonológica), GII (dez escolares com dislexia submetidos e dez escolares com dislexia não submetidos ao programa de leitura), GIII (dez escolares com dislexia submetidos e dez escolares com dislexia não submetidos ao programa de intervenção fonológica e leitura). Foi realizado o programa de intervenção fonológica e leitura em três etapas: pré-testagem, treino, pós-testagem. Os resultados revelaram diferenças estatisticamente significantes entre os dois momentos de avaliação, revelando melhora nas habilidades cognitivo-linguísticas em situação de pós-testagem comparando-se a pré-testagem, demonstrando a eficácia dos três programas para escolares com dislexia. Concluiu-se que houve uma melhora do desempenho dos escolares com dislexia submetidos aos programas de intervenção, evidenciando a necessidade da instrução fonológica no contexto da alfabetização, pois isso auxiliaria os escolares a desenvolverem habilidades cognitivo-linguísticas para a aprendizagem da base alfabética do sistema de escrita do português brasileiro.

Dyslexia is specific learning disabilities, of neurological origin, resulted from a phonological deficit of language. This study aims to verify the performance of students with dyslexia in phonological intervention program, reading program, and phonological and reading remediation program in students with dyslexia. The participants of this study were 60 students who were divided as follows: GI (ten students with dyslexia submitted to phonological remediation program and ten students with dyslexia not submitted to phonological remediation program), GII (ten students with dyslexia submitted to reading program and ten students with dyslexia not submitted to reading program), GIII (ten students with dyslexia submitted to phonological and reading program and ten students with dyslexia not submitted to phonological and reading program). The phonological and reading remediation was applied in three phases: pretest, training, post-testing. The results showed significant statistical difference between two evaluation moments, revealed better performance in the cognitive-linguistic skills in post-test situation comparing to the pretest, showing the efficacy of the three remediation programs for students with dyslexia. The better performance of the students with dyslexia submitted to the remediation programs shows the necessity of phonological instruction or phonological instruction with reading to be offered in the literacy context, once this will help students to develop cognitive-linguistic skills to learn the alphabetic basis of the Brazilian Portuguese writing system.

Visual-motor perception in students with attention deficit with hyperactivity disorder.

PURPOSE: The aim of this study was to characterize and to compare the visual-motor perception of students with Attention Deficit with Hyperactivity Disorder (ADHD) with students with good academic performance. METHODS: Forty students from 2nd to 5th grades of an elementary public school, male gender (100%), aged between 7 and 10 years and 8 months old participated, divided into: GI (20 students with ADHD) and GII (20 students with good academic performance), paired according to age, schooling and gender with GI. The students were submitted to Developmental Test of Visual Perception (DTVP-2). RESULTS: The students of GI presented low performance in spatial position and visual closure (reduced motor) and inferior age equivalent in reduced motor perception, when compared to GII. CONCLUSION: The difficulties in visual-motor perception presented by students of GI cannot be attributed to a primary deficit, but to a secondary phenomenon of inattention that interferes directly in their visual-motor performance.

Improvement of the orthodontic bracket bond strength with pre-heated composite restoratives.

AIM: This study aimed to evaluate the effect of pre-heated composite restoratives on the shear bond strength (SBS) of orthodontic brackets. METHODS: The following materials were tested: a microhybrid composite restorative (Filtek Z250), two nanofilled composite restoratives (Filtek Z350 and NT Premium), a nanohybrid composite restorative (Brilliant) and a conventional orthodontic adhesive (Transbond XT). All materials were stored for 1 h in the incubator either at 25°C (room temperature simulation) or 60°C before bonding 100 orthodontic brackets on bovine lower incisors (n = 10). One Coat Bond SL and Transbond XT were used to bond the composite restoratives and the Transbond XT adhesive paste, respectively. After storage in distilled water for 24 h, the brackets were subjected to SBS test at a speed of 0.5 mm/min until bracket debonding. The Adhesive Remnant Index (ARI) was assigned to the fractured specimens. Data were analyzed using the one-way ANOVA and the Tukey post-hoc test (p < 0.05). The Kruskal-Wallis test was used to compare ARI scores between the groups (p < 0.05). RESULTS: There was no statistically significant difference between the materials at room temperature. Samples bonded with pre-heated materials showed a statistically higher SBS than those bonded with room temperature materials. Samples bonded with the pre-heated orthodontic adhesive showed the highest SBS among all the pre-heated materials. All preheated composite restoratives produced an SBS mean higher than that of Transbond XT stored at room temperature. CONCLUSION: The use of pre-heated composite restoratives and orthodontic adhesives might be an alternative approach to bond orthodontic brackets.

Percepção viso-motora de escolares com Transtorno do Déficit de Atenção com Hiperatividade / Visual-motor perception in students with Attention Deficit with Hyperactivity Disorder

OBJETIVO: Caracterizar e comparar as habilidades de percepção viso-motoras de escolares com Transtorno do Déficit de Atenção com Hiperatividade (TDAH) com escolares com bom desempenho acadêmico. MÉTODOS: Participaram deste estudo 40 escolares na faixa etária de 7 anos a 10 anos e 8 meses, do 2º ao 5º ano do Ensino Fundamental de escolas públicas, divididos em GI (20 escolares com diagnóstico interdisciplinar de TDAH) do gênero masculino (100%) e GII (20 escolares com bom desempenho escolar), pareados com o GI em idade, escolaridade e gênero. Os escolares foram submetidos ao Teste Evolutivo de Percepção Visual (DTVP-2). RESULTADOS: Os escolares de GI apresentaram desempenho inferior na função de posição no espaço e closura visual (motricidade reduzida) e equivalente de idade inferior para percepção de motricidade reduzida em relação ao GII. CONCLUSÃO: As dificuldades em percepção viso-motora apresentadas pelos escolares de GI podem ser atribuídas não a um déficit primário, mas a um fenômeno secundário à desatenção que interfere de forma direta em seu desempenho de percepção viso-motora.

PURPOSE: The aim of this study was to characterize and to compare the visual-motor perception of students with Attention Deficit with Hyperactivity Disorder (ADHD) with students with good academic performance. METHODS: Forty students from 2nd to 5th grades of an elementary public school, male gender (100%), aged between 7 and 10 years and 8 months old participated, divided into: GI (20 students with ADHD) and GII (20 students with good academic performance), paired according to age, schooling and gender with GI. The students were submitted to Developmental Test of Visual Perception (DTVP-2). RESULTS: The students of GI presented low performance in spatial position and visual closure (reduced motor) and inferior age equivalent in reduced motor perception, when compared to GII. CONCLUSION: The difficulties in visual-motor perception presented by students of GI cannot be attributed to a primary deficit, but to a secondary phenomenon of inattention that interferes directly in their visual-motor performance.

Desempenho em consciência fonológica, nomeação rápida, leitura e escrita em escolares com dislexia secundária a retardo mental e com bom desempenho acadêmico / Performance in phonological awareness, rapid naming, reading and writing in students with secondary dyslexia to mental retardation and with good academic performance

OBJETIVOS: caracterizar o desempenho em provas de consciência fonológica, de nomeação rápida e de leitura e escrita em escolares com dislexia secundária a retardo mental e com bom desempenho acadêmico. MÉTODO: participaram deste estudo 20 escolares da 1ª a 4ª séries do ensino fundamental da rede pública municipal da cidade de Marília-SP, com faixa etária de 8 a 12 anos de idade, de ambos os sexos, divididos em GI (10 escolares com o diagnóstico interdisciplinar de dislexia secundária a retardo mental leve) e GII (10 escolares com bom desempenho acadêmico, pareados segundo sexo e faixa etária com o GI). Os escolares foram submetidos à Prova de Consciência Fonológica, à Prova de Leitura e Escrita e à Prova de Nomeação Automatizada Rápida. RESULTADOS: houve diferença significante em relação ao desempenho dos escolares nas provas silábicas e fonêmicas, na prova de leitura e escrita e na prova de nomeção rápida; os escolares de GII apresentaram melhor desempenho que os escolares de GI. CONCLUSÃO: houve relação entre os achados de velocidade de nomeação, leitura oral e escrita sob ditado, sendo relacionados ao déficit fonológico, à característica cognitivo-linguística do GI e à interferência da falta de instrução direta da correspondência grafofonêmica em situação de atividades acadêmicas para ambos os grupos.

PURPOSE: to characterize the performance in phonological awareness, rapid naming, reading and writing in students with developmental dyslexia secondary to mental retardation and good readers. METHOD: 20 students from first to fourth grade of a public school of Marília - SP, both genders, from to 8 to 12-year old took part in this study, divided into GI (10 students with interdisciplinary diagnosis of dyslexia, secondary to mild mental retardation) and GII (10 studentswith good academic development according to gender, age and grade level). The students were submitted to the Phonological Awareness Test, the Test of Reading and Writing and Rapid Automated Naming. RESULTS: there were significant differences regarding the performance of students in the syllabic and phonemic tasks, reading and writing, Rapid Automated Naming, with better performance of the students of GII than GI. CONCLUSION: there was a relationship among the findings of naming speed, oral reading and writing under dictation, which were related with the phonological deficit, cognitive-linguistic characteristic of GI and the interference and the lack of direct instruction of their spelling correspondence in a situation of academic activities for both groups.

Randomized clinical controlled trial on the effectiveness of conventional and orthodontic manual toothbrushes

The objective of this study was to compare the effectiveness of two manual toothbrushes (conventional and orthodontic). The following clinical parameters were used: VPI (visible plaque index) and GBI (gingival bleeding index). Patients, 64 total (30 males and 34 females), in the permanent dentition, with a mean age of 17.8 years, were randomly selected from a practice specializing in orthodontics. Each participant received audio-visual instructions on oral hygiene as well as a kit of materials containing two manual toothbrushes (orthodontic and conventional). Each toothbrush was randomly allocated to one side of the mouth (split-mouth design) and used for a period of approximately 4 weeks. The VPI and GBI were measured by a single calibrated examiner before (T0) and after (T1) the implementation of interventions. The Mann-Whitney test was used to compare the VPI values between the groups, and the Student t-test for independent samples was used to compare GBI values. The level of significance was set at 5%. No statistically significant difference was observed between the groups at T0 for both VPI and GBI, and at T1 for the GBI. The manual orthodontic toothbrush produced a statistically lower VPI (P < 0.05) at T1, but this did not seem to be of clinical importance.

Randomized clinical controlled trial on the effectiveness of conventional and orthodontic manual toothbrushes.

The objective of this study was to compare the effectiveness of two manual toothbrushes (conventional and orthodontic). The following clinical parameters were used: VPI (visible plaque index) and GBI (gingival bleeding index). Patients, 64 total (30 males and 34 females), in the permanent dentition, with a mean age of 17.8 years, were randomly selected from a practice specializing in orthodontics. Each participant received audio-visual instructions on oral hygiene as well as a kit of materials containing two manual toothbrushes (orthodontic and conventional). Each toothbrush was randomly allocated to one side of the mouth (split-mouth design) and used for a period of approximately 4 weeks. The VPI and GBI were measured by a single calibrated examiner before (T0) and after (T1) the implementation of interventions. The Mann-Whitney test was used to compare the VPI values between the groups, and the Student t-test for independent samples was used to compare GBI values. The level of significance was set at 5%. No statistically significant difference was observed between the groups at T0 for both VPI and GBI, and at T1 for the GBI. The manual orthodontic toothbrush produced a statistically lower VPI (P < 0.05) at T1, but this did not seem to be of clinical importance.

A eficácia da ortopedia pré-cirúrgica em pacientes com fissuras de lábio e palato: uma revisão sistemática da literatura / The efficacy of presurgical orthopedics in patients with cleft lipt and palate: a systematic review of the literature

Introdução: com base em estudos em curto prazo, tem-se empregado a ortopedia pré-cirúrgica (OP) no tratamento de pacientes com fissuras de lábio e palato. A maioria dos trabalhos consiste no relato do alinhamento dos rebordos alveolares, algo que supostamente facilita os procedimentos cirúrgicos de reparo do lábio superior. Falta, no entanto, uma avaliação mais criteriosa do verdadeiro grau de evidência apresentado na literatura. Objetivos: o presente estudo pretende, por meio de uma revisão sistemática, avaliar a vantagem em longo prazo do emprego da ortopedia pré-cirúrgica para o tratamento de pacientes com fissuras de lábio e palato, uni ou bilaterais, completas ou incompletas. Métodos: a mesma estratégia de busca, contendo palavras-chave em português e em inglês, foi empregada nas bases de dados eletrônicas Bireme (Cochrane, SciELO, BBO e Lilacs), PubMed e Embase. Todos os anos foram considerados. Elegeu-se como critério de inclusão a relevância do tema abordado em cada trabalho e o tipo de estudo realizado. Somente ensaios clínicos controlados foram selecionados. A eliminação dos artigos irrelevantes foi realizada por dois examinadores independentes, previamente calibrados. A princípio, a eliminação se deu com base no título, seguida da eliminação por resumo e, finalmente, por texto na íntegra. Resultados: o grau de concordância interexaminadores (Kappa) foi de 0,99 (bom). Conclusão: restaram apenas 9 artigos dentro dos critérios considerados, sendo praticamente todos a favor da não utilização da OP, uma vez que os resultados em longo prazo não compensam o desgaste e os custos envolvidos, seja do ponto de vista oclusal ou da estética facial.

Rapid naming, reading and comprehension in students with learning difficulties.

PURPOSE: To compare and correlate the performance of students with learning difficulties in rapid naming, reading and comprehension. METHODS: Participants were 32 students from 4th grade of elementary school of both genders, with ages between 11 years and 4 months and 12 years and 7 months. The first and second oral reading of a text selected based on the indication of 4th grade teachers were conducted, as well as the first and second reading comprehension task composed by four questions presented right after the reading, to which students should answered orally, and the rapid naming task from the Test of Cognitive-Linguistic Performance, individual version. RESULTS: Differences were found between the first and the second comprehension scores, and between rapid naming, first and second reading. There was a strong correlation between comprehension and reading, suggesting that the performance in the first reading significantly influenced the performance in the second reading, which also occurred for comprehension. CONCLUSION: The delay in the activities of naming, reading and comprehension in the first evaluation provoked failures in the phoneme-grapheme conversion that may be enough to cause learning difficulties in reading.