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1.
Am J Orthod Dentofacial Orthop ; 157(3): 313-319, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32115109

RESUMO

INTRODUCTION: The objective of this study was to evaluate the characteristics of force degradation of latex elastics of 10 kinds of elastics over 48 hours, both in vivo and in vitro. METHODS: For the in vivo study, 10 different kinds of elastics were randomly chosen for investigation: 1/8-inch (2 oz); 1/8-inch (3.5 oz); 3/16-inch (2 oz); 3/16-inch (3.5 oz); 1/4-inch (2 oz); 1/4-inch (3.5 oz); 5/16-inch (2 oz); 5/16-inch (3.5 oz); 3/8-inch (2 oz); and 3/8-inch (3.5 oz). Ten volunteers (aged 22-24 years) were selected to wear personalized clear retainers, which were made to hold the elastics in the mouth and stretched to a specific length. Control samples of 1/4-inch (2 oz) and 1/4-inch (3.5 oz) latex elastics were stretched to the same length and held in dry air conditions (temperature = 25°C) and in artificial saliva (temperature = 37°C, pH = 6.7). Force value and percentage of force degradation were estimated 10 times over a 48-hour period in both the in vivo and in vitro groups. A 1-way ANOVA and t test were used to identify statistical significance (P <0.05). RESULTS: The force degradation of the latex elastic in vivo is greater than in vitro. In the in vivo groups, during the first hour, the extension rate of all elastics decreased sharply about 13.16%-18.79%, then the rate of force degradation declined. The degradation of initial force was about 29.35%-39.94% after 48 hours. The extension range of 2.0-oz elastics reduced less than that of the 3.5-oz elastics in vivo. At the same time, with the same initial force, elastics with larger inner diameters decreased more slowly than the smaller elastics (P <0.05). CONCLUSIONS: The force degradation of latex elastic in vivo is much greater than that in both air and artificial saliva. In vivo, the force value of the orthodontic latex elastics decreased sharply in the first hour. The larger the inner diameter and smaller the setting force value were, the slower the force decay.


Assuntos
Látex , Aparelhos Ortodônticos , Análise do Estresse Dentário , Elasticidade , Humanos , Teste de Materiais , Estresse Mecânico , Adulto Jovem
2.
Am J Orthod Dentofacial Orthop ; 157(3): 329-339, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32115111

RESUMO

INTRODUCTION: The purpose of this study was to comparatively evaluate the effects of Twin-block (TB) appliance and sagittal-guidance Twin-block (SGTB) appliance on alveolar bone around mandibular incisors in growing patients with Class II Division 1 malocclusion, using cone-beam computed tomography. METHODS: The sample consisted of 25 growing patients with Class II Division 1 malocclusion (14 boys and 11 girls, mean age 11.92 ± 1.62 years) and was randomly distributed into the TB group (n = 13) and the SGTB group (n = 12). The treatment duration was 11.56 ± 1.73 months. Pretreatment (T1) and posttreatment (T2) cone-beam computed tomography scans were taken in both groups. Height, thickness at apex level, and volume of the alveolar bone around mandibular left central incisors were measured respectively on labial and lingual side, using Mimics software (version 19.0; Materialise, Leuven, Belgium). Based on the stable structures, 3-dimensional (3D) registrations of T1 and T2 models were taken to measure the sagittal displacement of incisors. Intragroup comparisons were evaluated by paired-samples t tests and Wilcoxon tests. Independent-samples t tests and Mann-Whitney U tests were used for intergroup comparisons. RESULTS: In both groups, alveolar bone height and volume on the labial side of the incisors significantly decreased after treatment (P <0.05). Lingual alveolar bone height, lingual and total alveolar bone volume, labial, lingual and total alveolar bone thickness showed no significant difference between T1 and T2 (P >0.05). In both groups the incisors tipped labially and drifted to the labial side. Compared with the TB group, less labial alveolar bone loss, less incisor proclination and crown edge drift were found in the SGTB group (P <0.05). CONCLUSIONS: Labial alveolar bone loss around mandibular incisors was observed after both types of appliances treatment in growing patients with Class II Division 1 malocclusion. Less labial alveolar bone loss, less incisor proclination, and crown edge drift were found in the SGTB group than in the TB group during treatment.


Assuntos
Perda do Osso Alveolar , Má Oclusão de Angle Classe II , Aparelhos Ortodônticos , Adolescente , Cefalometria , Criança , Tomografia Computadorizada de Feixe Cônico , Feminino , Humanos , Incisivo , Masculino , Má Oclusão de Angle Classe II/diagnóstico por imagem , Má Oclusão de Angle Classe II/terapia , Mandíbula , Coroa do Dente
3.
Am J Orthod Dentofacial Orthop ; 157(3): 385-391, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32115117

RESUMO

INTRODUCTION: Orthodontic patients are at an increased risk for developing caries. Dental caries is a biofilm-mediated disease, with mutans streptococci (MS) as the primary etiologic bacterial group. It has been suggested that persister cells (PCs), a subset of cells within the biofilm, contribute to the chronic infectious nature of dental caries. PC formation can be induced by environmental stressors such as orthodontic treatment. The aim of this study was to quantify MS, aerobic and facultative anaerobe bacterial PC proportions from plaque samples during the initial stage of orthodontic treatment. This study is the first to analyze the role of PCs in a population of patients highly susceptible to caries, that is, patients undergoing orthodontic treatment. METHODS: Plaque samples were collected from 17 participants (11 males and 6 females; age range: 11-18 years) before and 1 month after insertion of fixed orthodontic appliances. Percentages of MS and PCs were determined with selective media and a classical persister microbial assay, respectively. RESULTS: There was a statistically significant decrease in %MS (P = 0.039) but no statistically significant difference in %PCs (P = 0.939) after 1 month of orthodontic appliance placement. CONCLUSION: Our study illustrated the technical feasibility of analysis of PCs in plaque samples of patients during orthodontic treatment and revealed that PC formation during orthodontic treatment is highly variable across individuals.


Assuntos
Cárie Dentária , Placa Dentária , Aparelhos Ortodônticos Fixos , Streptococcus mutans , Adolescente , Criança , Cárie Dentária/microbiologia , Feminino , Humanos , Masculino , Aparelhos Ortodônticos , Aparelhos Ortodônticos Fixos/microbiologia , Saliva , Streptococcus mutans/isolamento & purificação
4.
Quintessence Int ; 51(4): 304-308, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32128526

RESUMO

This paper describes an alternative computer-aided design/computer-aided manufacturing (CAD/CAM) technique for the creation of a combined prosthetic restoration with orthodontic appliance (PROA). This concept allows the use of orthodontic appliances such as brackets, attachments, or any other type of appliance over different types of prosthetic restorations. The PROA concept aims to mitigate problems associated with performing restorative treatment when orthodontic treatment is necessary. This proposed concept provides the clinicians with proper control and planning of the interdisciplinary treatment that will lead to the final tooth shape, form, and proportions while performing orthodontic tooth movements.


Assuntos
Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Projeto Auxiliado por Computador , Técnicas de Movimentação Dentária
5.
Am J Orthod Dentofacial Orthop ; 157(2): 172-177, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32005468

RESUMO

INTRODUCTION: The aim of this study was to evaluate the impact of being overweight or obese while wearing orthodontic fixed appliances on the prevalence of gingivitis in adolescents. METHODS: A total of 334 adolescents, aged between 12 and 18 years, were recruited from 3 public schools in Cuiabá, Brazil. Participants were divided in dichotomized categories of body mass index (BMI) (under and normal weight or overweight and obesity) and fixed orthodontic appliance usage (yes or no). Gingival inflammation was evaluated by Löe & Silness index. Socioeconomic status was determined by the criteria of the Brazilian Association of Research Companies, and sugar consumption was assessed by a questionnaire of dietary habits. The statistical analysis was performed with P <0.05 considered significant. RESULTS: In a multivariate linear regression model, gingivitis was directly related to BMI (%) variation and orthodontic appliance use. In addition, excess weight seemed to be 2 times more relevant in predicting gingivitis than orthodontic fixed appliance usage. A strong positive correlation was observed between BMI (%) variation and gingival index (ρ = 0.97, P <0.001). CONCLUSIONS: Orthodontic fixed appliance usage and excess weight were associated with increased gingivitis in adolescents; BMI (%) variation was the most significant predictor of gingival inflammation.


Assuntos
Gengivite , Aparelhos Ortodônticos , Adolescente , Brasil/epidemiologia , Criança , Gengiva , Gengivite/epidemiologia , Gengivite/prevenção & controle , Humanos , Aparelhos Ortodônticos Fixos
6.
J Orthod ; 47(1): 47-54, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32009494

RESUMO

OBJECTIVE: To compare young people's experiences of wearing a range of orthodontic appliances. DESIGN: A cross-sectional, qualitative study with purposive sampling. SETTING: UK dental teaching hospital. PARTICIPANTS: Twenty-six orthodontic patients aged 11-17 years. METHODS: Patients participated in in-depth semi-structured interviews. All interviews were transcribed verbatim and analysed thematically. RESULTS: Young people reported physical, practical and emotional impacts from their appliances. Despite these reported impacts, participants described 'getting used' to and, therefore, not being bothered by their appliance. Framework analysis of the data identified a multi-dimensional social process of managing everyday life with an appliance. This involves addressing the 'dys-appearance' of the body through physically adapting to an appliance. This process also includes psychological approaches, drawing on social networks, developing strategies and situating experiences in a longer-term context. Engaging in this process allowed young people to address the physical, practical and emotional impacts of their appliances. CONCLUSION: This qualitative research has identified how young people manage everyday life with an appliance. Understanding this process will help orthodontists to support their patients.


Assuntos
Aparelhos Ortodônticos Funcionais , Aparelhos Ortodônticos Removíveis , Adolescente , Criança , Estudos Transversais , Emoções , Humanos , Aparelhos Ortodônticos , Aparelhos Ortodônticos Fixos , Contenções Ortodônticas , Pesquisa Qualitativa
7.
Head Face Med ; 16(1): 2, 2020 Feb 18.
Artigo em Inglês | MEDLINE | ID: mdl-32070379

RESUMO

BACKGROUND: Manufacturers of orthodontic aligners suggest that users remove appliances every time they consume solid foods or any drink (except water). This is to avoid a color change within the clear thermoplastic material of which they are made. However, limited quantitative evidence exists to guide users and practitioners in this regard. Herein, we evaluated the color stability of the polymer forming three different American brands of aligners and the stain-removal potential of two cleansers to provide such guidelines. METHODS: The removable appliances (300 specimens, 100 per brand) were exposed to different staining agents common in a regular diet (coffee, black tea, red wine, cola) or to a control solution in vitro over 12 h or 7 days. The three brands evaluated were Invisalign®, ClearCorrect® and Minor Tooth Movement®. These were then cleaned by using either Invisalign® cleaning crystals or the Cordless Sonic Cleaner combined with a Retainer Brite® tablet. The CIELAB color space approach was used to compare color changes (ΔE) in aligners before immersion (T0), after a 12-h exposure (T1), after a 7-day exposure (T2) and after cleaning (T3). Statistical methods (Levene's test, ANOVA, Brunner-Langer model, Tukey's range test and t-test) were used to identify interactions between the brands themselves or between the brands and the cleaning methods. Statistical analyses were performed at the .05 significance level. RESULTS: A 12-h or 7-day exposure to instant coffee or red wine significantly colored the Invisalign® aligners compared to the two other brands. Black tea created an important extrinsic color change for all three brands after 7 days. Clinically, both cleaning methods showed a better efficacy in removing stains from black tea compared to other staining agents. CONCLUSIONS: The Invisalign® aligners were more prone to pigmentation than the ClearCorrect® or the Minor Tooth Movement® devices after an exposure to coffee or red wine. Black tea caused important stains on the surface of the three tested brands. Both cleansing methods performed similarly.


Assuntos
Café , Colorimetria , Aparelhos Ortodônticos , Teste de Materiais , Espectrofotometria , Coloração e Rotulagem
8.
Am J Orthod Dentofacial Orthop ; 157(1): 49-58, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31901280

RESUMO

INTRODUCTION: The design of the orthodontic bracket or appliance is 1 of the most important factors for creating retentive areas for biofilm formation. In orthodontics, this would be the first study to compare the microbial level changes in 3 different types of orthodontic appliances using checkerboard DNA-DNA hybridization technique. The purpose of this study was to evaluate and compare the extent of appearance of orange and red microbial complexes in patients undergoing orthodontic treatment using aligners, conventional metallic fixed labial appliances, and lingual fixed appliances. METHODS: A total of 60 patients, of which 20 patients were undergoing treatment with aligners, 20 patients with labial fixed appliances, and 20 patients with lingual fixed appliances, were included in our study. After 30 days, debonded brackets and rinsed aligners were stored and processed for analysis with checkerboard DNA-DNA hybridization. RESULTS: Most bacterial species showed moderate counts, with the exception of Treponema denticola, which showed a higher count in all 3 types of appliances. Fusobacterium nucleatum, Porphyromonas gingivalis, and T denticola were present in a higher percentage in the lingual appliance. Fusobacterium periodontium and Prevotella intermedia were present in a higher percentage in the labial fixed appliance. Campylobacter rectus, Tannerella forsythia, and Prevotella melaninogenica counts were moderate in all 3 appliances, with the first 2 microbes showing slightly higher counts in aligners. The association between all the microorganisms were statistically insignificant, with the exception of F nucleatum, which showed a strong statistically significant association in all 3 types of appliances. CONCLUSIONS: The microbial contamination in metallic brackets was higher than that of aligners, when used for a month. Lingual fixed appliances showed more microbial contamination than labial fixed appliances followed by aligners.


Assuntos
Aparelhos Ortodônticos , DNA , Humanos , Porphyromonas gingivalis , Prevotella intermedia
9.
J Orofac Orthop ; 81(1): 41-51, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31792608

RESUMO

OBJECTIVES: The aim of this retrospective study is to compare external apical root resorption (EARR) after labial and lingual fixed orthodontic treatment, as detected with panoramic radiographs. MATERIALS AND METHODS: Sixty subjects were divided into two groups according to the treatment type: lingual (30 patients) and labial (30 patients) fixed orthodontic treatment. Panoramic radiographs which were obtained at the beginning of treatment (T0) and at the end of the treatment (T1) were evaluated. The maxillary and mandibular central and lateral incisors, as well as canine crown and root lengths were measured for T0 and T1. Crown to root ratios were used to determine EARR. Data were evaluated using analysis of variance and χ2 analysis. RESULTS: In all, 5 patients (16.7%) in the lingual group and 7 patients (23.3%) in the labial group had a minimum of one tooth with severe EARR, while 9 patients (30%) in the lingual group and 14 patients (46.7%) in the labial group had no EARR. A total of 26 teeth (7.2%) in the lingual group and 34 teeth (9.4%) in the labial group developed severe EARR; however, 184 teeth (51.1%) in the lingual group and 202 teeth (56.1%) in the labial group did not reveal any EARR. No statistically significant difference was found for the resorption rates between the treatment groups (p > 0.05). Although not statistically significant, there was a higher percentage of severe EARR in the mandible within the labial group. CONCLUSIONS: Both lingual and labial orthodontic techniques showed statistically similar root resorption rates. EARR is a multifactorial issue and individual predispositions must also be taken into consideration.


Assuntos
Reabsorção da Raiz , Humanos , Incisivo , Aparelhos Ortodônticos , Aparelhos Ortodônticos Fixos , Radiografia Panorâmica , Estudos Retrospectivos
10.
Oral Maxillofac Surg Clin North Am ; 32(1): 83-88, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31685346

RESUMO

Patients and orthodontists seek to reduce treatment time in braces. Rapid canine retraction through dentoalveolar distraction osteogenesis is one of several treatment approaches to reduce treatment in braces. This article provides an overview of technique of dentoalveolar distraction osteogenesis to accomplish rapid canine retraction and associated outcomes. When this treatment protocol is implemented well, rapid canine retraction is achieved predictably with minimal side effects. Although current evidence suggests that adverse sequelae, such as root resorptions and pulp devitalization, are rare, prospective clinical studies that are adequately powered and documenting long-term follow-up of these outcomes are lacking.


Assuntos
Procedimentos Cirúrgicos Bucais/métodos , Procedimentos de Ancoragem Ortodôntica , Desenho de Aparelho Ortodôntico , Osteogênese por Distração/métodos , Osteotomia/métodos , Técnicas de Movimentação Dentária/métodos , Humanos , Maxila , Procedimentos de Ancoragem Ortodôntica/efeitos adversos , Procedimentos de Ancoragem Ortodôntica/instrumentação , Aparelhos Ortodônticos , Procedimentos Cirúrgicos Ortognáticos , Estudos Prospectivos , Resultado do Tratamento
11.
Georgian Med News ; (295): 48-51, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31804198

RESUMO

Despite the rapid emergence of new devices in the practice of the orthodontist, the topical issue is not only to identify the effectiveness of the use of the proposed methods, but also to justify their economic component. The purpose of the work is to study the economic feasibility of applying the generally accepted and proposed methods during the treatment of sagittal bite anomalies. To assess the economic effect of the proposed technology, a comparison was made between the time spent by the orthodontist and the dental technician when applying the proposed and generally accepted methodology. 130 time tables were analyzed and the time of manufacture and correction of 130 orthodontic appliances was evaluated: 72 elastopozitioners, 36 activators function of the Frenkel and 22 activators of Andrezen-Goipl. As a result of the evaluation of chronometric tables with data on the use of laboratory and clinical time, when using the proposed and conventional devices, it was found that the consumption of time of a dental technician in the manufacture of elastopozitioners is 25 minutes more compared to the process of manufacturing functional double-jaw apparatus (activator Andresen-Goypl and the Frenkl's function regulator). However, from the point of view of saving the clinical time, that is, the time of the orthodontist, elastopozitioners is much more advantageous to use, since they do not need correction. Thus, in the process of assessing the possible economic effectiveness of the proposed methodology, it was found that by introducing individual myofunctional devices, elastopozitioners, into orthodontic practice, it is possible to increase the productivity of the dentist orthodontist almost 10 times.


Assuntos
Aparelhos Ortodônticos , Oclusão Dentária , Humanos , Aparelhos Ortodônticos/economia
12.
Shanghai Kou Qiang Yi Xue ; 28(4): 439-444, 2019 Aug.
Artigo em Chinês | MEDLINE | ID: mdl-31792490

RESUMO

PURPOSE: To evaluate the influence of removable thermoplastic appliances and fixed appliances on periodontal status. METHODS: Cochrane library, PubMed, EMBASE, CBM, CNKI, VIP, Wanfang Database were searched from the date of inception to 2017.10.16,to find clinical trials about removable thermoplastic appliances and fixed appliances on periodontal status. The quality of the included studies was assessed by two reviewers independently, and meta analysis was performed using RevMan5.3. RESULTS: Totally 11 studies including 543 patients were identified. The results of meta analysis showed there were significant difference in PLI and SPD at 3 months and PLI and GI at 6 months between removable thermoplastic appliances and fixed appliances, and no significant difference was observed in GI at 3 months and SPD at 6 months between the two groups. CONCLUSIONS: In the early orthodontic treatment, removable thermoplastic appliances has better effect than the fixed appliance on periodontal health.


Assuntos
Aparelhos Ortodônticos Fixos , Aparelhos Ortodônticos , Humanos
13.
Am J Orthod Dentofacial Orthop ; 156(6): 735-744, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31784007

RESUMO

INTRODUCTION: In this pilot study, we aimed to determine qualitative and quantitative microbiological changes after the implementation of orthodontic appliances. METHODS: A total of 10 healthy patients aged 12-15 years were recruited who needed to undergo orthodontic treatment with buccal fixed appliances. Gingival conditions were assessed by the Gingival Index, Periodontal Screening Index, and Sulcus Bleeding Index. Microbiological samples were collected before and 1 week after the start of therapy at premolars and molars of the right upper quadrant. Bacterial species were identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. RESULTS: The total number of bacteria increased. Six bacterial species were identified that are involved in the development of caries and other infectious processes. The bacteria selectively adapted more efficiently to the new oral milieu compared with the general oral microbial background. There was a significant increase in Streptococcus spp at the premolars and molars. In all individuals, symptoms of inflammation and gingivitis were detected as a response to the bacterial challenge. CONCLUSIONS: Orthodontic treatment induces significant changes in the oral microbial flora associated with gingivitis and an enhanced risk for cariogenic reactions within the first days of orthodontic treatment. To prevent or reduce infectious side effects, oral hygiene instructions and control of patients are necessary before and during the beginning of the therapy.


Assuntos
Bactérias , Gengivite , Boca , Aparelhos Ortodônticos Fixos , Adolescente , Criança , Humanos , Boca/microbiologia , Aparelhos Ortodônticos , Índice Periodontal , Projetos Piloto
14.
Am J Orthod Dentofacial Orthop ; 156(6): 758-766, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31784009

RESUMO

INTRODUCTION: The objective of this study was to evaluate the extent to which different types of orthodontic appliances influence the hiring process of an individual applying for a customer service position. METHODS: A total of 7 images were created for 2 adult models: 1 male and 1 female. One image was produced without orthodontic appliances, and 6 simulated the use of orthodontic appliances, including a conventional metallic appliance with a gray elastic ligature, a conventional metallic appliance with blue elastic ligature, a conventional appliance with a transparent elastic ligature, a self-ligating metal appliance, a self-ligating esthetic appliance, and a clear aligner. A photo album was designed for each model and delivered, along with a questionnaire, to individuals in charge of job interviews and hiring. These evaluators included 236 individuals, divided into 4 groups according to age and gender: males between 18-35 years (M), males over 35 years (M > 35), females between 18-35 years (F), and females over 35 years (F > 35). The evaluators quantified the chance of hiring the models using a Visual Analogue Scale. The Mann-Whitney test was used to compare the evaluators according to gender and age. The Wilcoxon test was used to compare the models according to gender. The Kruskal-Wallis and Dunn post hoc tests were used to compare the appliances according to design. A 5% significance level was used for all tests. RESULTS: The clear aligner group showed the highest likelihood of being hired, followed by the group without orthodontic appliances, the groups with esthetic appliances (ie, conventional appliance with a transparent elastic ligature, and self-ligating esthetic appliance), and the groups with metallic appliances (ie, self-ligating metal appliance, conventional metallic appliance with gray elastic ligature, and conventional metallic appliance with blue elastic ligature). CONCLUSIONS: Assuming all other qualifications of the applicants are equivalent, the use of an orthodontic appliance may influence job interviews. The better the esthetics of the appliance, the higher the likelihood of the individual being hired.


Assuntos
Emprego , Desenho de Aparelho Ortodôntico , Braquetes Ortodônticos , Seleção de Pessoal , Adolescente , Adulto , Estética Dentária , Feminino , Humanos , Masculino , Aparelhos Ortodônticos , Adulto Jovem
15.
Rev. Soc. Odontol. La Plata ; 29(57): 21-24, dic. 2019. ilus
Artigo em Espanhol | LILACS | ID: biblio-1049932

RESUMO

La atresia o estrechez del maxilar superior es una patología que observamos frecuentemente en nuestra práctica diaria. Es importante el diagnóstico a una edad temprana, no solo para resolver ortopédicamente dicha patología, sino también prevenir una posible cirugía ortognática en la adultez. La expansión palatina rápida es un recurso terapéutico ortopédico para la corrección de la discrepancia transversal esqueletal del maxilar superior, que se manifiesta clínicamente como mordida invertida posterior. Existen diversos tipos de disyuntores y técnicas para su realización. La llegada del anclaje absoluto con los mini-implantes abrió puertas que revolucionan conceptos clásicos de expansión.


Atresia or narrowing of the maxilla is a pathology that we frequently observe in our daily practice. It is important to diagnose at an early age, not only to solve orthopedically this pathology, but also to prevent a possible orthognathic surgery at an adult age. Rapid palatal expansion is an orthopedic therapeutic resource for the correction of the skeletal transverse discrepancy of the maxilla. This pathology manifests clinically as a posterior crossbite. There are different types of expanders and techniques for their realization. The arrival of the absolute anchorage with the mini-implants opened doors that revolutionized classic concepts of expansion


Assuntos
Humanos , Masculino , Criança , Aparelhos Ortodônticos , Implantes Dentários , Técnica de Expansão Palatina , Ortopedia , Arcada Osseodentária/anatomia & histologia
16.
Rev. Soc. Odontol. La Plata ; 29(57): 21-24, dic. 2019. ilus
Artigo em Espanhol | LILACS | ID: biblio-1051009

RESUMO

La atresia o estrechez del maxilar superior es una patología que observamos frecuentemente en nuestra práctica diaria. Es importante el diagnóstico a una edad temprana, no solo para resolver ortopédicamente dicha patología, sino también prevenir una posible cirugía ortognática en la adultez. La expansión palatina rápida es un recurso terapéutico ortopédico para la corrección de la discrepancia transversal esqueletal del maxilar superior, que se manifiesta clínicamente como mordida invertida posterior. Existen diversos tipos de disyuntores y técnicas para su realización. La llegada del anclaje absoluto con los mini-implantes abrió puertas que revolucionan conceptos clásicos de expansión (AU)


Atresia or narrowing of the maxilla is a pathology that we frequently observe in our daily practice. It is important to diagnose at an early age, not only to solve orthopedically this pathology, but also to prevent a possible orthognathic surgery at an adult age. Rapid palatal expansion is an orthopedic therapeutic resource for the correction of the skeletal transverse discrepancy of the maxilla. This pathology manifests clinically as a posterior crossbite. There are different types of expanders and techniques for their realization. The arrival of the absolute anchorage with the mini-implants opened doors that revolutionized classic concepts of expansion (AU)


Assuntos
Humanos , Masculino , Criança , Aparelhos Ortodônticos , Ortopedia , Implantes Dentários , Técnica de Expansão Palatina , Arcada Osseodentária/anatomia & histologia
17.
Am J Orthod Dentofacial Orthop ; 156(5): 633-640, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31677672

RESUMO

INTRODUCTION: Although the Invisalign system has been used widely in recent years, the influences of this treatment on the oral microbiome and whether or not this influence is different from that of fixed appliances is still unknown. In this study, we investigated the changes in the oral microbiome in patients treated with the Invisalign system or with fixed appliances. METHODS: Fifteen subjects were enrolled, comprising 5 fixed appliance patients, 5 Invisalign patient, and 5 healthy controls. Saliva samples were collected, and high-throughput pyrosequencing was performed based on the 16S rRNA gene. RESULTS: Both fixed and Invisalign orthodontic treatments resulted in dysbiosis of the oral microbiome. Firmicutes and TM7 at the phyla level and Neisseria at the genus level displayed statistically significant differences between the 2 orthodontic groups. The effect of these changes with microbiome on oral health was inconsistent. The inferred microbial function of the Invisalign group suggested this group was more predisposed to periodontal diseases. CONCLUSION: The influence of the Invisalign system on the oral microbiome was no better for oral health compared with fixed appliances. The convenience of maintaining oral hygiene rather than changes in the oral microbiome may be the underlying reason for the performance of the Invisalign system on oral health.


Assuntos
Microbiota , Aparelhos Ortodônticos Fixos , Aparelhos Ortodônticos Removíveis , Humanos , Boca/microbiologia , Higiene Bucal , Aparelhos Ortodônticos , RNA Ribossômico 16S
18.
Am J Orthod Dentofacial Orthop ; 156(5): 675-684, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31677676

RESUMO

Orthognathic surgery is necessary when a patient's major complaints include skeletal discrepancies that cannot be corrected with orthodontic treatment alone. Currently, orthognathic surgery can be performed through conventional and surgery-first approaches. Some advantages are attributed to the surgery-first approach, such as shortened treatment time and immediate esthetic improvement. The aim of this case report is to present the retreatment of a patient presenting with a skeletal Class III malocclusion, with maxillary retrusion and mandibular protrusion, who was successfully treated with the surgery-first approach and customized lingual appliances, combined with miniplate anchorage in the postoperative orthodontic treatment. The total orthodontic treatment time was 8 months.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Cirurgia Ortognática , Procedimentos Cirúrgicos Ortognáticos , Cefalometria , Estética Dentária , Humanos , Aparelhos Ortodônticos , Retratamento , Língua
19.
Niger J Clin Pract ; 22(11): 1530-1538, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31719274

RESUMO

Background: Bimaxillary protrusion is a common dentofacial condition associated with proclination of maxillary and mandibular incisors in relation to the dental and cranial bases resulting in soft tissue procumbency. The present retrospective study aimed to investigate dental and soft tissue profile changes using cephalometric analysis to evaluate bimaxillary protrusion patients after extraction of the first four premolars and subsequent retraction of the anterior teeth. Materials and Methods: Pre-treatment and post-treatment cephalometric radiographs of 46 Saudi patients (16 males and 30 females), 18-30 years of age with bimaxillary protrusion, were selected based on inclusion criteria. Dental and soft tissue landmarks were traced using the Dolphin® imaging software and statistically analyzed with SPSS® 21 software. Results: The upper and lower incisors retroclined by a mean value of 9.6° and 9.65°, respectively, and an average distance of 4.1 mm. The level of maxillary incisor exposure was reduced by approximately 1.1 mm after treatment. A mean increase of 6.6° in the nasolabial angle was also observed. Multiple regression analysis showed that retraction of both upper and lower incisors by 1 mm would result in a 0.44 mm retraction of the upper and lower lips. Conclusion: A statistically significant increase in the nasolabial angle and upper lip length was found in relation to upper and lower incisor retraction and retroclination. A significant reduction was also evident in the post treatment upper incisor exposure, facial convexity angle and mentolabial sulcus depth.


Assuntos
Cefalometria/métodos , Face/anatomia & histologia , Incisivo/anormalidades , Má Oclusão/terapia , Extração Dentária , Adolescente , Adulto , Dente Pré-Molar/cirurgia , Feminino , Humanos , Incisivo/diagnóstico por imagem , Lábio/anatomia & histologia , Masculino , Má Oclusão/etnologia , Maxila , Aparelhos Ortodônticos , Radiografia , Estudos Retrospectivos , Adulto Jovem
20.
Medicine (Baltimore) ; 98(43): e17325, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31651838

RESUMO

BACKGROUND: Pain stemming from the placement of elastomeric separators and the exchanging of wires and accessories is the greatest reason for abandoning orthodontic treatment. Indeed, discomfort related to treatment exerts a negative impact on quality of life due to the difficulty chewing and biting. This paper proposes a study to evaluate the analgesic effects of photomiobodulation (PBM) on individuals undergoing orthodontic treatment. METHODS: The sample will be composed of 72 individuals who receiving elastomeric separators on the mesial and distal faces of the maxillary first molars. The patients will be randomly allocated to 2 groups: an experimental group irradiated with low-level laser and a sham group submitted to simulated laser irradiation. Upon the placement of the separators, the experimental group will receive a single application of PBM on the mesial and distal cervical portion and apical third of the molars. Perceived pain will be analyzed after one hour using the visual analog scale in both groups. Samples will be taken of the gingival crevice with absorbent paper for 30 seconds for the analysis of cytokines using ELISA and the results of the 2 groups will be compared. The patients will sign a statement of informed consent. Statistical analysis will be performed with the Student's t test and analysis of variance (ANOVA). DISCUSSION: The expectation is that the patients in the irradiated group will have a lower perception of pain and lower quantity of cytokines compared to those in the sham group. The purpose of the study is to establish an effective method for PBM with the use of low-level infrared laser (Ga-Al-As with a wavelength of 808 nm and output power of 100 mW) for reductions in pain and inflammatory cytokines related to orthodontic treatment. TRIAL REGISTRATION: This protocol was registered in ClinicalTrial.gov, under number NCT03939988. It was first posted and last updated in May 6, 2019.


Assuntos
Elastômeros/efeitos adversos , Terapia com Luz de Baixa Intensidade/métodos , Aparelhos Ortodônticos/efeitos adversos , Dor Processual/terapia , Técnicas de Movimentação Dentária/efeitos adversos , Adolescente , Adulto , Análise de Variância , Feminino , Humanos , Masculino , Dente Molar , Medição da Dor , Dor Processual/etiologia , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do Tratamento , Adulto Jovem
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