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As drogas utilizadas para prevenção de convulsões podem impactar na movimentação dentária durante o tratamento ortodôntico. O objetivo deste estudo foi avaliar a influência de drogas anticonvulsivantes no tratamento ortodôntico. O desenho deste estudo é uma revisão narrativa da literatura onde uma busca eletrônica foi realizada sem restrição de idioma e data em três bases de dados (PubMed via MEDLINE, SCOPUS e BVS). Foram utilizados os seguintes termos para o PubMed e BVS: anticonvulsants drugs AND orthodontic movement e para o SCOPUS: anticonvulsants AND drugs AND orthodontic AND movement. Uma pesquisa complementar foi realizada nas referências bibliográficas dos estudos incluídos. Os artigos indicaram que o uso de medicação anticonvulsivante favorece o desenvolvimento de hiperplasias gengivais, xerostomia e alterações no metabolismo ósseo que modulam a taxa de movimentação ortodôntica. Dentro das limitações desta revisão, concluiu-se que não há contraindicações para tratamento ortodôntico em pacientes utilizando anticonvulsivantes, no entanto os ortodontistas devem estar cientes dos potenciais efeitos adversos advindos do uso desses medicamentos para que possam adotar medidas para mitigar esses riscos.

Drugs used to prevent seizures can have an impact on tooth movement during orthodontic treatment. This study aimed to evaluate the influence of anticonvulsant medications on orthodontic treatment. The design of this study is a narrative literature review in which an electronic search was carried out without language or date restriction in three databases (PubMed/MEDLINE, SCOPUS, and BVS). The following terms were used for PubMed and BVS: anticonvulsants drugs AND orthodontic movement and SCOPUS: anticonvulsants AND drugs AND orthodontic AND movement. A complementary search was carried out on the bibliographical references of the included studies. The articles indicated that using anticonvulsant medication favors the development of gingival hyperplasia, xerostomia, and alterations in bone metabolism that modulate the rate of orthodontic movement. Within the limitations of this review, it was concluded that there is no contraindication for orthodontic treatment in patients using anticonvulsants. However, orthodontists should be aware of the potential adverse effects arising from the use of these drugs so that they can adopt measures to minimize these risks.

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This study aimed to describe the changes produced on the occlusal plane (OP), the mandibular position and the dentoalveolar compensations of patients with distalization of the maxillary/mandibular arch assisted by mini-screws (MS). A descriptive case-series study was performed using the digital lateral cephalograms (DLC) of nine patients who underwent orthodontic treatment and required the use of MS for a complete distalization of the maxillary/mandibular arch. Records were collected at three different times (T1-T2-T3) and digitally analyzed (variables: Skeletal diagnosis; maxillary occlusal plane; position of the maxilla/mandible; and dentoalveolar changes of the distalization arch tracing the longitudinal axis of incisors/molars regarding the palatal/mandibular plane). Findings show that the OP varied from T1-T2-T3 in all cases, indicating its stepping or flattening. ODI, APDI, SNA, SNB, and ANB changed minimally in all cases, without variations in the mandibular position or in the skeletal diagnosis. Dentoalveolar measurements also showed differences between T1-T2-T3. In summary, conventional orthodontic treatment modified the OP during the first phase of treatment. Moreover, the distalization mechanics with MS changed the OP and produced dentoalveolar changes, mainly in the inclination of incisors and molars. Other measures considered in the study did not change substantially.

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PURPOSE: This two-arm parallel randomized controlled trial aimed to evaluate and compare periodontal changes due to rapid maxillary expansion (RME) using tooth-bone-borne and tooth-borne devices in growing patients via clinical examinations and cone-beam computed tomography (CBCT). MATERIALS AND METHODS: Forty-two eligible patients (aged 11-14 years; transverse maxillary deficiency, posterior crossbite) were screened and divided into two groups based on the treatment received (randomization was performed using computer-generated numeric sequences): hybrid hyrax tooth-bone-borne group (TBB) and hyrax tooth-borne group (TB). The primary outcome was the change in cortical bone thickness (by CBCT). In addition, the clinical attachment level (CAL), gingival recession, and bleeding were assessed. Both examinations were performed before and 3 months after the activation phase. Intergroup comparisons were performed using analysis of covariance (ANCOVA; P < 0.05). RESULTS: Twenty-one patients (12 girls and 9 boys; mean initial age, 13.3 years) were included in the TBB group and 21 (5 girls and 16 boys; mean initial age, 13.2 years) were included in the TB group. The TB group exhibited a decrease in buccal bone thickness in the first premolars and first molars at all three evaluated levels. Specifically, tooth 14 at 3 mm from the enamel-cement junction showed a significant width reduction (0.7 mm; p < 0.001), accompanied by a notable increase in palatal cortical thickness at 6 mm of enamel-cement junction (1.13 mm; p < 0.001). CONCLUSIONS: RME resulted in buccal bone thickness reduction at the first premolar with hyrax treatment. In the molar region, both devices resulted in cortical bone alterations that were less pronounced in the TBB group.

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One of the biggest controversies in current orthodontics is determining the appliance to use, since today patients seek better results in shorter times, in addition to putting aesthetics first. OBJECTIVE: compare the benefits and disadvantages that arise when using fixed orthodontic appliances and transparent aligners. MATERIALS AND METHODS: An investigation and compilation of specialized bibliographic information on the topic was carried out in scientific search engines such as PubMed, SciElo and Web of Science between the years 1991 to 2023, focused on research work related to the effects of the use of orthodontic appliances. fixed compared to clear aligners. RESULTS: The review was carried out based on 53 articles found that met the selection criteria. CONCLUSION: Fixed orthodontic appliances are better in complex cases, they are more precise and less likely to relapse; Transparent aligners are more aesthetic, hygiene is more affective and the bone density of the mandibular condyle decreases.

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OBJECTIVES: To investigate artefacts produced by different orthodontic brackets and wires in cone-beam computed tomography (CBCT) scans. MATERIALS AND METHODS: Two dental arches were made using extracted human teeth and plaster. Three pairs of acetate plates containing different brackets - metallic, ceramic, and self-ligating ceramic with NiTi clip - along with a control plate (i.e., without brackets) were prepared. Wire changes (NiTi and steel) were made during CBCT acquisitions, performed with a fixed exposure protocol. Axial slices were selected for mean gray values and standard deviation measurement in three regions of interest (buccal, lingual, and tooth). Noise and contrast-to-noise ratio (CNR) were calculated and compared among the different brackets and wires by ANOVA with a significance level of 5%. RESULTS: Overall, the buccal and tooth region were mostly affected by the metallic and self-ligating brackets, showing higher noise, and lower CNR (p < 0.05). On the other hand, less impact of ceramic brackets in the image quality was observed (p ≥ 0.05). The lingual region did not show expressive differences among the brackets and wire combinations (p ≥ 0.05). The presence of wire associated with the brackets did not worsen image quality (p ≥ 0.05). CONCLUSIONS: In conclusion, metallic and self-ligating brackets have greater artefact expression than ceramic brackets. The wire did not influence image quality. CLINICAL RELEVANCE: One should pay attention to the type of brackets when requesting a CBCT scan during treatment, as metallic and self-ligating brackets may express greater artefacts than ceramic brackets.

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The aim of this study was to evaluate the effectiveness of motivational interviewing on improving oral hygiene behavior in patients with fixed orthodontics appliances. A parallel-group randomized clinical trial was conducted with 45 patients of the Orthodontic Clinic of Unibe's Postgraduate Unit. A computer-generated list of numbers created with SPSS V21.0 was used to randomly allocate participants into the experimental or the control group. Monthly oral hygiene instructions and an oral hygiene kit from GUM® with special orthodontic hygiene tools were given to the participants. Furthermore, the experimental group underwent motivational interviewing sessions facilitated by a periodontist who received training from two expert psychologists. These psychologists also provided supervision to the interviewer, ensuring the accurate implementation of the intervention. Simplified Oral Hygiene Index (SOHI), Gingival Index (GI), Periodontal Probing Depth (PPD) and Bleeding on Probing (BoP) were recorded at baseline, three and six months after the beginning of the study. The participant and the evaluator (another periodontist who recorded the data) were masked. Repeated-measures mixed- model analysis of variance and chi-squared test were conducted. Mean SOHI, GI, PPD and BoP scores did not differ significantly across the three time points (baseline, three and six months). Nevertheless, a significant interaction on SOHI scores (F (2, 58) = 3.463, p = .038, h2 = .052) was found between the sessions and the treatment conditions (experimental vs control group) at the third and sixth month. Motivational interviewing plus oral hygiene instructions appears to maintain a better control of dental biofilm and calculus in comparison with conventional oral hygiene instructions alone.

El objetivo de este trabajo fue evaluar la efectividad de las entrevistas motivacionales para mejorar el comportamiento de higiene oral en pacientes con aparatos ortodóncicos fijos. Se llevó a cabo un ensayo clínico aleatorizado de grupos paralelos con 45 pacientes de la Clínica de Ortodoncia de la Unidad de Posgrado de Unibe. Se utilizó una lista de números generada por computadora con SPSS V21.0 para asignar aleatoriamente a los participantes al grupo experimental o de control. Se les proporcionó a los participantes instrucciones mensuales de higiene oral y un kit de higiene oral de GUM® con utensilios de higiene especiales para ortodoncia. Además, el grupo experimental recibió sesiones de entrevista motivacional facilitadas por un periodoncista capacitado por dos psicólogas expertas. Estas psicólogas también supervisaron al entrevistador, asegurando la implementación precisa de la intervención. Se registró el Índice Simplificado de Higiene Oral (IHO-S), el Índice Gingival (IG), la Profundidad de Sondaje Periodontal (PS) y el Sangrado al Sondaje (SS) al inicio, a los tres y seis meses después del inicio del estudio. Tanto el participante como el evaluador (otro periodoncista que registró los datos) estaban enmascarados. Se realizaron análisis de varianza de medidas repetidas con modelo mixto y pruebas de chi-cuadrado. Las puntuaciones medias del IHO-S, IG, PS y SS no difirieron significativamente en los tres momentos (inicio, tres y seis meses). Sin embargo, se encontró una interacción significativa en las puntuaciones del IHO-S (F (2, 58) = 3.463, p = .038, h2 = .052) entre las sesiones y las condiciones de tratamiento (grupo experimental vs grupo de control) en el tercer y sexto mes. Las entrevistas motivacionales junto con las instrucciones de higiene oral parecen mantener un mejor control de la biopelícula dental y el cálculo en comparación con las instrucciones convencionales de higiene oral por sí solas.

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Objective: This pilot study concerned evaluation of the success of predicted dental changes in patients presenting with Class I malocclusions who were submitted to treatment aligners, using the superimposition. Methods: The digital models were superimposed and analyzed using 3DSlicer 5.0 software. Treatment and predicted changes regarding horizontal and vertical linear displacements, mesiodistal rotations, and incisor buccolingual tipping were quantified. The success rates were calculated by dividing the mean treatment change amount by the predicted change amount. Results: Lower-incisor intrusion was the most accurate of the predicted vertical displacements (86.96 %), and buccal expansion of upper canines (99.32 %) and mesial translation of the lower incisors (98.57 %) were the most accurate horizontal linear displacements. The predicted rotation was achieved with the highest accuracy for lower incisors (75.69 %). Incisor buccolingual tipping success rates ranged between 45.78 % and 69.31 %. Low accuracy of predicted changes was found for upper-molar extrusion (10.23 %) and constriction (8.91 %). However, minimal corrections in these directions were planned. Conclusions: Dental changes for all regions of maxillary and mandibular arches could be evaluated. High success rates were observed for most of the movements planned for ClearCorrect aligner therapy.

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BACKGROUND: This study aims to compare the impact of pain on quality of life and patient satisfaction during treatment with aligners. METHODS: Ninety-four subjects in active treatment were invited to answer self-reported questions concerning pain severity and duration, occurrence of other signs and symptoms, and level of satisfaction with their treatment. Also, the OHIP-14 questionnaire was applied to assess patients' OHRQoL. RESULTS: Ninety-four patients (49 women and 45 men) answered the survey. Pain duration of 1-3 days was reported by 69.1% of patients (n = 60). For those who reported pain (n = 84), it was considered mild severity by 42.9% and moderate by 52.4%. Almost sixty-four percent of the sample were very satisfied with the aligner's aesthetics (n = 60) and forty-nine percent were satisfied with treatment in general (n = 46). Mean OHIP-14 score was 3.36 ± 2.54. OHRQoL was significantly associated with pain severity, whereas patients who reported having experienced moderate pain presented a significantly higher mean OHIP-14 score than those who reported having experienced mild pain (3.92 ± 1.93 and 2.69 ± 2.83, respectively; p = 0.036). The "psychological discomfort" OHIP-14's domain was the most influenced by the level of pain. CONCLUSION: Pain severity significantly influenced OHRQoL, in adult patients under treatment with clear aligners. However, high levels of patient satisfaction were reported, regardless of pain duration or severity.

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OBJECTIVE: To evaluate the efficacy of microchips and 3D microsensors in the measurement of orthodontic forces. METHODS: Through September 2023, comprehensive searches were conducted on PubMed/MEDLINE, SCOPUS and SCIELO without restrictions. RESULTS: After removing duplicate entries and applying the eligibility criteria, 23 studies were included for analysis. All the studies were conducted in vitro, and slightly more than half of them were centred on evaluating orthodontic forces exerted by aligners. Eight utilized microchips as measurement tools, while the remaining studies made use of 3D microsensors for their assessments. In the context of fixed appliances, key findings included a high level of agreement in 3-dimensional orthodontic force detection between simulation results and actual applied forces. Incorporating critical force-moment combinations during smart bracket calibration reduced measurement errors for most components. Translational tooth movement revealed a moment-to-force ratio, aligning with the bracket's centre of resistance. The primary findings in relation to aligners revealed several significant factors affecting the forces exerted by them. Notably, the foil thickness and staging were found to have a considerable impact on these forces, with optimal force transmission occurring at a layer height of 150 µm. Furthermore, the type of material used in 3D-printing aligners influenced the force levels, with attachments proving effective in generating extrusive forces. Deliberate adjustments in aligner thickness were observed to alter the forces and moments generated. CONCLUSIONS: Microchips and 3D sensors provide precise and quantitative measurements of orthodontic forces in in vitro studies, enabling accurate monitoring and control of tooth movement.

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BACKGROUND: This single-centered randomized controlled clinical trial aimed to evaluate the effectiveness of micro-osteoperforations (MOPs) in accelerating the orthodontic retraction of maxillary incisors. METHODS: Forty-two patients aged 16-40 were recruited and randomly assigned into two groups, one which underwent MOPs (MOPG) in the buccal and palatal region of all maxillary incisors immediately before the start of retraction and one which did not (CG). Eligibility criteria included the orthodontic need for maxillary first premolars extraction and space closure in two phases. The primary outcome of the study consisted of measuring the rate of space closure and, consequently, the rate of incisors' retraction using digital model superimposition 14 days later and monthly thereafter for the next 4 months. The secondary outcomes included measuring anchorage loss, central incisors' inclination, and root length shortening, analyzed using cone beam computed tomography scans acquired before retraction and 4 months after retraction. Randomization was performed using QuickCalcs software. While clinical blinding was not possible, the image's examinator was blinded. RESULTS: Twenty-one patients were randomly assigned to each group. However, due to various reasons, a total of 37 patients (17 male and 20 female) were analyzed (mean age: 24.3 ± 8.1 years in the MOPG; 22.2 ± 4.2 years in the CG) during the trial. No statistically significant difference was found between the MOPG and the CG regarding the incisors' retraction measured at different time points at the incisal border (14 days, 0.4 mm vs. 0.5 mm; 1 month, 0.79 mm vs. 0.77 mm; 2 months, 1.47 mm vs. 1.41 mm; 3 months, 2.09 mm vs. 1.88 mm; 4 months, 2.62 mm vs. 2.29 mm) and at the cervical level (14 days, 0.28 mm vs. 0.30 mm; 1 month, 0.41 mm vs. 0.32 mm; 2 months, 0.89 mm vs. 0.61 mm; 3 months, 1.36 mm vs. 1.10 mm; 4 months, 1.73 mm vs. 1.39 mm). Similarly, no statistically significant differences were detected in the space closure, anchorage loss, central incisors' inclination, and radicular length between groups. No adverse effect was observed during the trial. CONCLUSIONS: MOPs did not accelerate the retraction of the maxillary incisors, nor were they associated with greater incisor inclination or root resorption. Trial registration ClinicalTrials.gov NCT03089996. Registered 24 March 2017- https://clinicaltrials.gov/ct2/show/NCT03089996 .

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OBJECTIVE: To compare the anterior crowding correction after sequential use of the first 5 aligners between two aligner exchange protocols (7 and 14 days) in mature adult patients. MATERIALS AND METHODS: Thirty-six patients over 35 years who received orthodontic treatment with Invisalign® were randomly allocated to two different aligner replacement sequence protocols: Group 1: exchange every 7 days (n = 18); and Group 2: exchange every 14 days (n = 18). All patients were scanned with iTero Element 5D® (Align Technology) in two treatment times: at pre-treatment (T1) and after using the first five aligners (T2). Little's Irregularity Index (LII) and arch widths were evaluated with OrthoCAD software. Intra and intergroup comparisons were performed with the dependent and independent t-tests. The results were considered significant for P < .05. RESULTS: Thirty-five patients completed the study. Both groups' maxillary and mandibular Irregularity Indexesi were significantly lower at T2. There was no significant difference in inter-canine, inter-premolar, and intermolar distances. G2 (14 days) presented a greater decrease in mandibular irregularity than G1 (7 days). CONCLUSION: Both exchange protocols (7 and 14 days) effectively correct anterior crowding in the initial phase of orthodontic treatment with aligners in mature adult patients. However, the 14-day exchange protocol provided a greater correction in mandibular anterior crowding in the evaluated period than the 7-day exchange protocol.

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OBJECTIVE: To evaluate the knowledge and preference of patients treated at a Dental School in Jaraguá do Sul, Brazil, about using aligners and the reasons for choosing this device as a treatment option. DESIGN: A cross-sectional study. PARTICIPANTS: A total of 82 participants aged 18-45 years recruited at a screening clinic. METHODS: A questionnaire was completed in person using a tablet with digital forms. RESULTS: Almost half of the participants (49%) knew about aligners; 40% were aged 18-24 years, and 77% were female. When observing the images of the types of orthodontic appliances, the aligners had an acceptance rate of 80%. Among the reasons that led to the preference for choosing aligners, 68% cited aesthetics and 42% comfort. CONCLUSION: Recently, clear aligners have become a popular choice for orthodontic treatment, particularly among adults. Despite their popularity and effectiveness, many patients still need more information about aligner treatment. Over half of the respondents did not know what orthodontic aligners were. Younger participants had more knowledge about aligners than older participants. Patients still need more knowledge about the types of appliances available for orthodontic treatment. When presented with images of the kinds of devices available, almost 80% of participants showed greater satisfaction with aligners.

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OBJECTIVE: This study aims to utilize the finite element method (FEM) to compare the dentoalveolar and mandibular effects associated with anterior mandibular repositioning using AdvanSync® (ADV) and Twin Block (TB). METHODS: A patient with Class II skeletal malocclusion and mandibular retrognathism was selected. A TB appliance was subsequently applied. Computed Tomography (CT) scans were acquired at the beginning of treatment (T1) and 8 months later (T2). Concurrently, a numerical TB model was validated through FEM simulations, which were compared with the T2 results. The ADV appliance was virtually simulated to evaluate stress and deformation on the condyle, symphysis, first lower molar and lower central incisors. RESULTS: Both simulations demonstrated significant mandibular advancement. However, ADV led to less incisor proclination and more molar intrusion compared to TB. ADV exhibited increased stress in the lower molar area, while TB had higher stress in the lower incisor region. Stress and deformations in the condyle and mandibular symphysis were similar in both simulations, with the highest stress observed at the condylar neck and the lowest at the upper pole of the condylar head. CONCLUSIONS: Both appliances achieved similar levels of mandibular advancement, with greater proclination of the lower central incisors and more widespread distribution of stress and molar intrusion when using ADV compared to TB.

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OBJECTIVE: The aim of this study is to assess the microbial contamination of three different brands of esthetic elastomeric ligatures. MATERIALS AND METHODS: Different brands of esthetic ligatures (Unistick Pearl [American Orthodontics, Sheboygan, WI, USA], Power Sticks Pearl [Ortho Technology, Tampa, FL, USA], and Ease [Obscure, 3M Unitek, Monrovia, CA, USA]) were randomly assigned to permanent canines of 25 patients (aged 11-18 years) undergoing corrective orthodontic treatment. After 30 days, the ligatures were removed, processed, and the biofilm composition was analyzed by checkerboard DNA-DNA hybridization for 40 bacterial species. The microbiological data were analyzed using a nonparametric mixed model. RESULTS: The ligatures presented intense microbial contamination after 30 days, but no statistically significant differences were observed among the three groups (p > 0.05). The levels of the evaluated individual species and proportions of the microbial complexes showed no statistically significant differences among the ligature groups (p > 0.05). CONCLUSIONS: Esthetic elastomeric ligatures became multicolonized by several bacterial species after 30 days of exposure to the oral cavity. However, no relevant differences were observed among the biofilm composition formed on the different ligature brands.

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Este trabalho visou relatar o caso clínico de um paciente padrão III com mordida cruzada anterior, através de um tratamento compensatório com o uso de bráquetes que geram torques resistentes nos incisivos. O paciente JPCN, 42 anos, leucoderma, gênero masculino, procurou a clínica ortodôntica com a queixa principal de mordida cruzada anterior. Na análise extrabucal, observou-se a presença de padrão horizontal, simetria facial, maxila deficiente, ângulo nasolabial fechado, presença de selamento labial passivo e perfil côncavo com o lábio inferior à frente do superior. A prescrição utilizada foi a biofuncional, apresentado 0° de torque nos incisivos superiores e 10° nos incisivos inferiores. Foram realizados o alinhamento e nivelamento, mecânica de acentuação da curva de Spee no arco superior e reversão no arco inferior simultaneamente aos elásticos intermaxilares. Ao final do tratamento, foram observados correção da relação anteroposterior e intercuspidação dentária, trespasse horizontal e vertical normais, linhas médias coincidentes e selamento labial passivo. Concluiu-se que a utilização de torques resistentes nos incisivos gerados pelo uso de bráquetes da técnica biofuncional foi eficiente para manter uma boa inclinação desses dentes durante a correção damá oclusão de Classe III com o uso de elásticos intermaxilares (AU)

This study aimed to report the clinical case of a patient with pattern III with anterior crossbite, through a compensatory treatment with the use of brackets that generate resistant torques in the incisors. Patient JPCN, 42 years old, caucasian, male, came to the orthodontic clinic with the main complaint of anterior crossbite. In the extraoral analysis, it was observed the presence of a horizontal pattern, facial symmetry, deficient maxilla, closed nasolabial angle, presence of passive lip seal, and concave profile with the lower lip in front of the upper. The prescription used was the biofunctional, with 0° of torque on the upper incisors and 10° on the lower incisors. Alignment and leveling, orthodontic mechanics of Spee curve accentuation in the maxillary arch and reversal in the mandibular arch were performed simultaneously with intermaxillary elastics. At the end of the treatment, Class III correction, correction of the anteroposterior relationship and dental intercuspation, normal overbite and overjet, coinci-dent midlines and passive lip seal were observed. It was concluded that the use of resistant torques on the incisors promoted by the use of biofunctional technique brackets was efficient to maintain a good inclination of these teeth during the correction of Class III malocclusion with the use of intermaxillary elastics (AU)

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Com a diversificação das prescrições existentes, a correta escolha de acordo com a necessidade individual de cada má oclusão pode ser importante para estabelecer maior controle biomecânico durante o tratamento ortodôntico. Este estudo teve como objetivo avaliar o tratamento ortodôntico com a versatilidade na associação de diferentes prescrições em um relato de caso clínico e determinar se existe alguma relação com a dimensão vertical, transversal e o perímetro de arco que podem contribuir com a estabilidade e longevidade do tratamento ortodôntico. A prescrição, quando corretamente indicada, tem impacto no controle do movimento dentário para estabelecer oclusão, estética e estabilidade adequadas. Concluiu-se que o surgimento de novas prescrições tende a favorecer ao máximo a abrangência de mais pacientes no tratamento ortodôntico (AU)

With the diversification of existing bracket prescriptions, the correct choice according to the individual needs of each malocclusion is essential to establish greater biomechanical control during orthodontic treatment. This study aimed to evaluate orthodontic treatment with the versatility in association of different prescriptions in a clinical case report and to determine whether there is any relationship with the vertical dimension, transverse dimension, and arch perimeter that can contribute to the stability and longevity of the orthodontic treatment. The prescription, when correctly indicated, has an impact on the control of tooth movement to establish proper occlusion, esthetics, and stability. It was concluded that the emergence of new prescriptions favors the maximum coverage of more patients in orthodontic treatment. (AU)

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A cada ano que passa a procura por tratamentos ortodônticos está mais frequente, e isso se dá pelo fato da valorização do sorriso e da estética facial estar cada vez mais perceptível perante a sociedade. As modalidades de tratamento são diversas, e com o avanço da tecnologia, estão cada vez mais modernas, confortáveis e objetivas para suprir a necessidade do paciente. Dentre elas, podemos citar a aparatologia ortodôntica fixa que é o sistema mais antigo e os alinhadores estéticos que são os aparelhos mais modernos na ortodontia digital. Esse estudo tem como objetivo relatar dois casos clínicos e revisar a literatura científica existente acerca do tratamento ortodôntico utilizando aparelhos fixos comparados aos alinhadores removíveis, evidenciando suas vantagens e desvantagens, indicações e limitações (AU)

With each passing year the search for orthodontic treatments is more frequent, and this is due to the fact that the appreciation of smile and facial aesthetics is increasingly noticeable before society. The treatment modalities are diverse, and with the advancement of technology, are increasingly modern, comfortable, and objective in view of the needs of the patient. Among them, we can mention the fixed orthodontic aparatology, which is the oldest system, and the aesthetic aligners that are the most modern devices in the face of digital orthodontics. This study aims to report clinical cases and review the existing scientific literature on orthodontic treatment using fixed devices compared to removable aligners, evidencing its advantages and disadvantages indications, and limitations.(AU)

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Este estudo objetivou determinar o efeito do armazenamento em longo prazo nas características mecânicas dos elásticos intermaxilares e o período apropriado para substituição no uso clínico. 270 elásticos (135 látex e 135 sintéticos), 3/16" médio, foram submetidos a testes de tração uniaxial com estiramento de 200% até 600% dos seus diâmetros internos. Os elásticos foram divididos nos grupos "Como Recebidos" (CR, n = 15); armazenados em refrigerador por 3 anos (n = 60), e armazenados à temperatura ambiente por 3 anos (n = 60). Os grupos de elásticos armazenados foram subdivididos em 4 subgrupos (n = 15 cada): sem estiramento prévio (SEP); estiramento prévio simulando o ambiente intraoral por 24 horas (EP24h), 48 horas (EP48h) e 72 horas (EP72h). Quanto aos elásticos de látex, as forças expressadas pelo grupo SEP, independente da temperatura de armazenamento, permaneceram similares às forças do grupo CR. Elásticos armazenados em temperatura ambiente de SEP até EP72h perderam aproximadamente 25 gF (p = 0.001), enquanto os refrigerados perderam em média 10 gF (p = 0.05). Sobre os elásticos sintéticos, o grupo SEP, independente da temperatura de armazenamento, ganhou, em média, 50 gF (p = 0.001) em comparação ao grupo CR. Os armazenados em temperatura ambiente, desde SEP até EP72h, perderam em média 30 gF (p = 0.001), enquanto os refrigerados perderam aproximadamente 50 gF (p = 0.001). Concluiu-se que os elásticos ortodônticos armazenados em longo prazo em suas embalagens originais expressam forças maiores do que os elásticos novos, e ao usar clinicamente elásticos armazenados a longo prazo, as substituições podem ser feitas a cada 72 horas sem perda da eficiência mecânica (AU)

This paper aimed to determine the effect of long-term storage on latex and non-latex intermaxillary elastics, and the proper time between substitutions. 270 elastics (135 latex and 135 non-latex elastics), medium force and standard size of 3/16", underwent uniaxial tensile tests with increase from 200% to 600% of their inner diameter. Each type was divided into groups of as received elastics (AR - n = 15), 3 years stored under refrigeration (n=60), and e years stored at room temperature (n=60). The stored groups were divided into 4 subgroups (n = 15): no previous stretching (NPS), pre-stretched si mulating the intraoral environment during 24 hours (PS24h), 48 hours (PS48h), and 72 hours (PS72h). About the elastics of latex, the forces expressed by the NPS at room temperature remained equal to the AR, while the forces of the refrigerated NPS had increased ±70 gF on average (p = 0.001). PS24h to PS72h at room temperature showed loss of ±20 gF (p = 0.001) when compared to the NPS or to AR. Non-latex - NPS, regardless of the temperature of storage, increased forces ± 70gF (p = 0.001) when compared to the AR. Starting at PS24h to PS72h, it was seen an average loss of ± 40gF (p = 0.001) when compared to the NPS. All 3 years stored non-latex elastics forces increased ± 30gF (p = 0.01) when compared to the AR. It was concluded that orthodontic elastics long-term stored in their original packages shows higher average forces than new elastics, and the replacement, when using long-term stored could be every 72 hours (AU)

Assuntos

RESUMO

O objetivo do presente estudo é apresentar o caso de um paciente adulto com má oclusão de Classe II esquelética e síndrome da apneia obstrutiva do sono (SAOS), tratado com cirurgia ortognática de benefício antecipado. Paciente do sexo masculino, 46 anos de idade, Padrão II birretruso, má oclusão de Classe II bilateral e com diagnóstico de SAOS leve. O tratamento proposto foi a cirurgia ortognática de benefício antecipado com avanço bimaxilar para correção esquelética e aumento do espaço aéreo superior. Após a cirurgia, pode-se observar um satisfatório avanço maxilar e mandibular, melhora no perfil facial e correção da relação molar bilateral. Além disso, notou-se o aumento das vias aéreas superiores e consequente melhora da respiração e qualidade do sono. A cirurgia ortognática de benefício antecipado mostrou-se uma alternativa terapêutica eficaz para a correção esquelética e funcional. Um ganho estético e funcional foi obtido após o tratamento ortodôntico cirúrgico.(AU)

The aim of this study is to report the orthodontic treatment of a male adult patient with skeletal Class II malocclusion and obstructive sleep apnea (OSA), treated with surgery first approach. Male patient, 46 years old, Class II facial pattern, bilateral Class II malocclusion, and mild OSA. The treatment proposed was the surgery first approach with bimaxillary advancement to correct the skeletal discrepancy and to enlarge the upper airway. After surgery, a satisfactory maxillary and mandibular advancement, facial profile improvement, and correction of the molar relationship were observed. In addition, an increase in the upper airway dimension and improvement in the breathing and sleep quality were obtained. The surgery first approach was an effective treatment alternative to correct the functional and skeletal discrepancies. Esthetical and functional satisfactory changes were obtained after the combined orthodontic/surgical treatment.(AU)

Assuntos