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1.
Prog Orthod ; 25(1): 19, 2024 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-38797777

RESUMO

BACKGROUND: Skeletal anterior open bite (SAOB) represents one of the most complex and challenging malocclusions in orthodontics. Orthodontic treatment supported by miniplates enable to reduce the need for orthognathic surgery. Transverse dimension may be affected by intrusion biomechanics. This study aims to assess transverse bone alterations in patients with SAOB who underwent orthodontic treatment with absolute anchorage using four miniplates. METHODS: A total of 32 patients of both sexes, with an average age of 33.8 years, diagnosed with SAOB and treated orthodontically with four miniplates (one in each hemiarch), were selected for this study. Tomographic examinations were performed before (T1) and after (T2) orthodontic treatment. Linear measurements (width of the maxillary base, maxillary alveolar, maxillary root, maxillary dental cusp, mandibular alveolar) and angular measurements (maxillary intermolar angle) were assessed in these images. The Shapiro-Wilks normality tests were applied to verify data distribution, and the paired t-test was used to compare the initial and final measures obtained. RESULTS: Among the evaluated parameters, the maxillary alveolar width, maxillary dental cusp width, mandibular alveolar cusp width, and intermolar angle showed statistically significant differences between T1 and T2 (p < 0.05). However, maxillary base and maxillary root widths showed no significant difference (p > 0.05). CONCLUSIONS: Intrusion and distalization with miniplates in SAOB therapy may lead to significant expansive changes, due to molars cusps width and buccal inclination increase restricted at the alveolar level.


Assuntos
Placas Ósseas , Mandíbula , Mordida Aberta , Procedimentos de Ancoragem Ortodôntica , Humanos , Procedimentos de Ancoragem Ortodôntica/instrumentação , Procedimentos de Ancoragem Ortodôntica/métodos , Masculino , Feminino , Mordida Aberta/terapia , Mordida Aberta/diagnóstico por imagem , Adulto , Mandíbula/diagnóstico por imagem , Maxila/diagnóstico por imagem , Cefalometria , Processo Alveolar/diagnóstico por imagem , Técnicas de Movimentação Dentária/instrumentação , Técnicas de Movimentação Dentária/métodos , Tomografia Computadorizada por Raios X/métodos , Adulto Jovem , Desenho de Aparelho Ortodôntico
2.
Dental Press J Orthod ; 27(5): e22ins5, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36629629

RESUMO

INTRODUCTION: In clinical practice, submerged roots are found with high frequency, and their presence can change the planning of dental movements and implant placement. OBJECTIVES: To provide explanations of possible developments in the area involved, according to the evolutionary stage of the process, at the time of diagnosis. DISCUSSION: After atrophy of the periodontal ligament and epithelial remnants of Malassez, ankylosis of the bone with the submerged root occurs, and initiates a process of replacement resorption. Until this process reaches the most advanced stage, this area represents an increased "bone" density, and if some care is not taken, this can generate resorption problems in the tooth to be moved. Whereas implants can be placed, despite the presence of the submerged root, irrespective of the stage of evolution. CONCLUSION: It is natural for the onset of alveolodental ankylosis and tooth replacement resorption to occur in submerged roots, and its stage of evolution will be decisive in the approach to be adopted in clinical planning.


Assuntos
Implantes Dentários , Anquilose Dental , Reabsorção de Dente , Humanos , Raiz Dentária , Ligamento Periodontal
3.
Am J Orthod Dentofacial Orthop ; 162(5): 656-667, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-35948464

RESUMO

INTRODUCTION: Multiple force vector applications may be indicated when an arch segment or en masse intrusion is needed. This finite element method study aimed to evaluate the total deform the stress yielded in the bone and the miniplate when forces with different directions and magnitudes were applied. METHODS: First, the prototyped skull model was fabricated on the basis of computed tomography (CT) scans. On this model, the miniplate was fixed, and orthodontic appliances were attached. Then, a 3-dimensional finite element model was constructed by reproducing the characteristics of the physical model. Seven situations were investigated, which diverged in the point of force application, the direction and the number of force vectors, and the force magnitudes. RESULTS: When the force was applied at 1 point, similar behavior could be observed concerning the deformation and the stress in the miniplate, the maxilla, and the screw holes. Most deformation and stress appeared in the transmucosal arm below the step bend and at the force application point. The angled vectors (-45° and 30°) presented smaller values concerning the vertical vectors. Similar or better performances could be observed when the forces were simultaneously applied at the 2 points. CONCLUSIONS: The newly designed miniplate showed similar or improved performances when multiple vectors were applied at the 2 points simultaneously compared with the force applied at 1 point. This newly designed miniplate may present improved performance in a clinical situation when multiple forces are demanded.

4.
Dental Press J Orthod ; 27(3): e22ins3, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35792793

RESUMO

INTRODUCTION: Induced tooth-bone movement occurs by a synchronicity of dental and bone phenomena, thanks to the osteocytic network, which is a three-dimensional network that controls the bone shape or design. OBJECTIVE: To describe the tooth-bone movement induced by enhanced anchorage, divided into three distinct moments: zero, start and stop. QUESTION: From this description, the main question arises: with the use of mini-implants/miniplates, what changes in the biology of induced tooth-bone movement? The answer is: nothing changes, either biologically or microscopically. CONCLUSION: This technique optimizes the treatment time, and the range of therapeutic possibilities is broadened, thanks to the synchronicity of phenomena - which remain the same, in all teeth and bones, yet in a synchronized manner. Bone anchorage represents synchronicity in induced tooth-bone movement.


Assuntos
Procedimentos de Ancoragem Ortodôntica , Técnicas de Movimentação Dentária , Biologia , Osso e Ossos , Humanos , Procedimentos de Ancoragem Ortodôntica/métodos , Osteócitos , Técnicas de Movimentação Dentária/métodos
5.
J. health sci. (Londrina) ; 24(3): 167-172, 20220711.
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1412657

RESUMO

The objective of this study was to evaluate the tooth crown inclination in maxillary and mandibular arches in Class III malocclusion individuals, to identify the presence and magnitude of compensation. The study was conducted on 46 plaster casts of individuals with Class III malocclusion, of both genders (25 males and 21 females), with mean age 21 years and 1 month, with indication for compensatory orthodontic treatment. The dental casts models were scanned and the tooth crown inclinations were measured and compared with standard values by the independent t test. All tests considered a significance level of 5% (p<0.05). According to the results there was extensive variation in tooth inclination in Class III malocclusions. Values distribution for incisors highlighted the significant concentration of maxillary incisors in the area of positive values, compared with a very expressive concentration of mandibular incisors in the area of negative values. Compared with normal standards, in Class III malocclusions, the maxillary posterior teeth exhibited smaller palatal inclination than normal, while the mandibular incisors and second molars presented greater lingual inclination. It was concluded that the analysis of inclinations of all crowns of both dental arches in Class III malocclusions, compared with normal standards, evidenced the presence of natural compensation for maxillary posterior teeth, with reduced palatal inclination, as well as increased lingual inclination in mandibular incisors. The parameters of compensation naturally present in Class III malocclusions described, especially in lower incisors, would help clinicians when compensatory treatment is considered. (AU)


O objetivo deste estudo foi avaliar a inclinação das coroas dentárias nas arcadas superior e inferior em indivíduos com má oclusão de Classe III, para identificar a presença e a magnitude da compensação. O estudo foi realizado em 46 modelos de gesso de indivíduos com má oclusão de Classe III, de ambos os sexos (25 homens e 21 mulheres), com média de idade de 21 anos e 1 mês, com indicação de tratamento ortodôntico compensatório. Os modelos de gesso foram digitalizados e as inclinações da coroa dos dentes foram medidas e comparadas com os valores de normalidade pelo teste t independente. Todos os testes estatísticos adotaram um nível de significância de 5% (p <0,05). De acordo com os resultados, houve grande variação na inclinação dentária nas más oclusões de Classe III. A distribuição dos valores para os incisivos destacou a concentração significativa de incisivos superiores na área de valores positivos, em comparação com uma concentração muito expressiva de incisivos inferiores na área de valores negativos. Comparados aos padrões de normalidade, nas más oclusões de Classe III, os dentes posteriores superiores exibiram inclinação palatina menor que o normal, enquanto os incisivos e segundos molares inferiores apresentaram inclinação lingual maior. Concluiu-se que a análise das inclinações de todas as coroas de ambas as arcadas dentárias nas más oclusões de Classe III, comparadas aos padrões de normalidade, evidenciou a presença de compensação natural para os dentes posteriores superiores, com diminuição da inclinação palatina, bem como aumento da inclinação lingual dos incisivos inferiores. Os parâmetros de compensação naturalmente presentes nas más oclusões de Classe III descritos, especialmente nos incisivos inferiores, podem auxiliar o clínico quando o tratamento compensatório é considerado. (AU)

6.
J Stomatol Oral Maxillofac Surg ; 123(5): 498-504, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35577305

RESUMO

INTRODUCTION: The gummy smile is perceived in 10% of the population aged 20 to 30 years old, and it causes an aesthetic imbalance in the smile. This study investigated the existence of differences in the aesthetic perception of the smile after correcting the gummy smile using two different techniques: orthognathic surgery for maxillary impaction and miniplate-aided orthodontic impaction. METHODS: Photographs of 16 Long Face Pattern female patients were evaluated by 56 oral and maxillofacial surgeons, 56 orthodontists, and 56 laypeople before and after the treatment with one of the two techniques. These photographs were standardized using the Photoshop program, randomly organized, and then presented to the evaluators via the Google Meeting® application in the PowerPoint® program. To evaluate the attractiveness of the smile, the Visual Analogue Scale (VAS) was used. To analyze the intra and inter-examiner concordances, Spearman's correlation and Kendall's concordance tests were used, respectively. For intergroup comparison, the Friedman test was used, with a 5% significance level. RESULTS: For all three groups of evaluators, the post-treatment evaluation results were superior to the results before the treatment: surgeons and orthodontists assigned higher scores for surgical cases and laypeople for orthodontic cases. CONCLUSION: From a clinical point of view, there was no difference between the results of both techniques with regard to the aesthetic perception of smiles. A gingival exposure ranging from zero to two millimeters was considered the most aesthetic for all evaluators.


Assuntos
Cirurgia Ortognática , Sorriso , Adulto , Atitude do Pessoal de Saúde , Atitude Frente a Saúde , Estética Dentária , Feminino , Gengiva/cirurgia , Humanos , Incisivo , Percepção , Adulto Jovem
7.
Dental Press J Orthod ; 27(1): e22ins1, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35416866

RESUMO

JUSTIFICATION: Canines represent corners in the dental arch, and are important features in facial esthetics, as they support the upper lip, wing of the nose, and influence the nasolabial fold and the appearance of facial aging. In the laterality movements, the canines guidance coordinate the opening and closing of the teeth, saving the TMJ from sudden movements. DISCUSSION: As a result of the lack of eruption or the inadequate positioning of the maxillary canine, the loss of the laterality guide may occur, which will then occur in the maxillary lateral incisor, inducing lesions of "occlusal trauma", such as inflammatory root resorption. Likewise, without well positioned canines, there may be premature aging and change in facial esthetics. CONCLUSION: In order to avoid problems with eruption and positioning of the maxillary canines, early diagnosis is made by analyzing their position and their relationship with the other teeth, and in the three-dimensional context of the maxilla, between 8-10 years of age. Preventive measures can create bone space and direction so that the maxillary canines can occupy their position in the dental arch.


Assuntos
Oclusão Dentária Traumática , Reabsorção da Raiz , Erupção Ectópica de Dente , Traumatismos Dentários , Dente Impactado , Dente Canino , Oclusão Dentária Traumática/patologia , Humanos , Incisivo/patologia , Maxila , Reabsorção da Raiz/etiologia , Reabsorção da Raiz/patologia , Reabsorção da Raiz/prevenção & controle
8.
J Stomatol Oral Maxillofac Surg ; 123(5): 546-550, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-34813966

RESUMO

OBJECTIVE: To evaluate, by means of cone beam computed tomography (CBCT), the volume change of maxillary sinuses in patients that underwent orthodontic maxillary posterior en masse intrusion anchored with miniplates. MATERIALS AND METHODS: The sample consisted of pretreatment (T1) and posttreatment (T2) CBCT scans obtained from 14 patients (4 male and 10 female), with a mean age of 32.4 years, that underwent orthodontic maxillary posterior en masse intrusion anchored with miniplates in the zygomatic crest. The mean treatment duration was 20 months and the mean intrusion movement was 2.4 mm. Maxillary sinus volume was measured by means of the software ITK SNAP (version 3.8.0) in T1 and T2 CBCT scans. The changes in sinuses volume were calculated by T1-T2 values. Data were analyzed statistically with Wilcoxon test at 5% of level of significance and the method error was analyzed with Wilcoxon test, intraclass correlation and Dahlberg's formula. RESULTS: The mean difference (T1-T2) was -242.85 mm³ (p = 0.396) for the right sinus and -32.5 mm³ (p = 0.875) for the left sinus. A slight increase in the volume of the sinuses was shown although these results were not statistically significant. CONCLUSION: The orthodontic maxillary posterior en masse intrusion anchored with miniplates did not influence significantly the maxillary sinus volume.


Assuntos
Seio Maxilar , Tomografia Computadorizada de Feixe Cônico Espiral , Adulto , Tomografia Computadorizada de Feixe Cônico/métodos , Feminino , Humanos , Masculino , Maxila/diagnóstico por imagem , Maxila/cirurgia , Seio Maxilar/diagnóstico por imagem , Seio Maxilar/cirurgia , Estudos Retrospectivos
9.
Dental press j. orthod. (Impr.) ; 27(5): e22ins5, 2022. graf
Artigo em Inglês | LILACS-Express | LILACS, BBO - Odontologia | ID: biblio-1421342

RESUMO

ABSTRACT Introduction: In clinical practice, submerged roots are found with high frequency, and their presence can change the planning of dental movements and implant placement. Objectives: To provide explanations of possible developments in the area involved, according to the evolutionary stage of the process, at the time of diagnosis. Discussion: After atrophy of the periodontal ligament and epithelial remnants of Malassez, ankylosis of the bone with the submerged root occurs, and initiates a process of replacement resorption. Until this process reaches the most advanced stage, this area represents an increased "bone" density, and if some care is not taken, this can generate resorption problems in the tooth to be moved. Whereas implants can be placed, despite the presence of the submerged root, irrespective of the stage of evolution. Conclusion: It is natural for the onset of alveolodental ankylosis and tooth replacement resorption to occur in submerged roots, and its stage of evolution will be decisive in the approach to be adopted in clinical planning.


RESUMO Introdução: A frequência, na prática clínica, das raízes submersas é elevada, e sua presença pode modificar o planejamento de movimentações osteodentárias e da instalação de implantes. Objetivo: Apresentar as explicações das possíveis evoluções na área envolvida, de acordo com o estágio evolutivo do processo, no momento do diagnóstico. Discussão: Depois da atrofia do ligamento periodontal e dos restos epiteliais de Malassez, o osso anquilosa-se com a raiz submersa, e se inicia a reabsorção por substituição. Até se chegar ao estágio mais avançado, essa área representa uma densidade "óssea" aumentada, o que pode gerar problemas reabsortivos no dente a ser movimentado, caso alguns cuidados não sejam tomados. Por outro lado, os implantes podem ser aplicados, apesar da presença da raiz submersa, independentemente da fase evolutiva. Conclusão: É natural que, em raízes submersas, se instale a anquilose alveolodentária e a reabsorção dentária por substituição, e o seu estágio evolutivo será determinante na conduta a ser adotada no planejamento clínico.

10.
Dental press j. orthod. (Impr.) ; 27(3): e22ins3, 2022. graf
Artigo em Inglês | LILACS-Express | LILACS, BBO - Odontologia | ID: biblio-1384694

RESUMO

ABSTRACT Introduction: Induced tooth-bone movement occurs by a synchronicity of dental and bone phenomena, thanks to the osteocytic network, which is a three-dimensional network that controls the bone shape or design. Objective: To describe the tooth-bone movement induced by enhanced anchorage, divided into three distinct moments: zero, start and stop. Question: From this description, the main question arises: with the use of mini-implants/miniplates, what changes in the biology of induced tooth-bone movement? The answer is: nothing changes, either biologically or microscopically. Conclusion: This technique optimizes the treatment time, and the range of therapeutic possibilities is broadened, thanks to the synchronicity of phenomena - which remain the same, in all teeth and bones, yet in a synchronized manner. Bone anchorage represents synchronicity in induced tooth-bone movement.


RESUMO Introdução: A movimentação osseodentária induzida ocorre meio de uma sincronicidade de fenômenos dentários e ósseos, graças à rede osteocítica, uma rede tridimensional de controle do formato ou design ósseo. Objetivo: Descrever a movimentação osseodentária induzida com ancoragem ampliada, dividindo-a em três momentos distintos: zero, start e stop. Questionamento: Dessa descrição origina-se a principal pergunta: com o uso de mini-implantes/miniplacas, o que muda na biologia da movimentação osseodentária induzida? A resposta é: não muda nada, nem biologicamente, nem microscopicamente. Conclusão: O que se otimiza, com essa técnica, é o tempo de tratamento, e se amplia o leque de possibilidades terapêuticas, graças à sincronicidade dos fenômenos - que continuam sendo os mesmos, em todos os dentes e nos ossos, só que de forma sincronizada. A ancoragem óssea representa a sincronicidade na movimentação osseodentária induzida.

12.
Dental Press J Orthod ; 26(5): e21ins5, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-35640084

RESUMO

OBJECTIVE: Biologically explain some of the bone mechanisms involved in the intrusion, or intrusive effect, of teeth submitted to skeletal open bite correction using four miniplates. METHODS: The results of dental intrusion were measured and compared in 3D reconstructions of cone beam computed tomography scans taken before and after treatment of 20 patients with skeletal open bite, aged between 18 and 59 years. RESULTS: The results allow deducing that the compression and traction forces biologically promoted deformation or deflection of the osteocyte network that controls bone design, and these effects involved the external and internal surfaces of the bone, with the formation of new layers, including the cervical portion of the alveolar bone crest. This helps understanding how dental intrusion occurs in intrusive mechanics, whose forces are of inclination rather than intrusion. The root resorptions caused by the use of miniplates were insignificant, due to the more homogeneous distribution of forces in the several teeth simultaneously involved. CONCLUSION: Imaging studies in CT scans tend to capture in details the subperiosteal and endosteal phenomena of dental intrusion - before and after the application of intrusive mechanics -, in the form of a set of modifications called dental intrusion or intrusive effect .


Assuntos
Mordida Aberta , Procedimentos de Ancoragem Ortodôntica , Reabsorção da Raiz , Dente , Adolescente , Adulto , Humanos , Pessoa de Meia-Idade , Mordida Aberta/terapia , Procedimentos de Ancoragem Ortodôntica/métodos , Técnicas de Movimentação Dentária/métodos , Adulto Jovem
13.
J Craniomaxillofac Surg ; 49(2): 84-92, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33376041

RESUMO

OBJECTIVE: The aim of this retrospective and observational study was to compare the accuracy of two different virtual surgical planning (VSP) protocols, namely, the CASS method and the modified CASS method. MATERIALS AND METHODS: The patients underwent bimaxillary orthognathic surgery, planned using either the CASS method or the modified CASS method. Linear and angular discrepancies between the VSP outcome and postoperative outcome for both groups were compared for maxilla, mandible, and chin segments. Aside from the comparison between both groups, additional criteria were used to determine the accuracy of the protocol based on a linear and angular difference between planned and actual outcomes of less than 2 mm and 4°, respectively. The intergroup comparisons were performed by one-way ANOVA, with the level of significance set at 5%. RESULTS: A total of 21 patients, of both genders, were assigned into group I (n = 11), planned with the CASS method, and group II (n = 10), planned with the modified CASS method. Both the CASS and modified CASS methods presented similar accuracy with regard to linear differences for the maxilla, mandible, and chin segments, except for ΔX for the mandibular segment, where the modified CASS method showed slightly better accuracy. However, there was a statistically significant difference with regard to angular differences in the chin segment, with the CASS method shown to be the more accurate. Aside from Δpitch for the chin segment, no linear or angular differences exceeded 2 mm or 4°. CONCLUSION: Although statistically significant differences were found with regard to angular measurements in the chin segment, the accuracy of the modified CASS method for virtual planning can be considered as clinically equivalent, with a performance comparable to that of the CASS method.


Assuntos
Cirurgia Ortognática , Procedimentos Cirúrgicos Ortognáticos , Cirurgia Assistida por Computador , Computadores , Feminino , Humanos , Imageamento Tridimensional , Masculino , Planejamento de Assistência ao Paciente , Estudos Retrospectivos
14.
Dental press j. orthod. (Impr.) ; 26(5): e21ins5, 2021. graf
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1345941

RESUMO

ABSTRACT Objective: Biologically explain some of the bone mechanisms involved in the intrusion, or intrusive effect, of teeth submitted to skeletal open bite correction using four miniplates. Methods: The results of dental intrusion were measured and compared in 3D reconstructions of cone beam computed tomography scans taken before and after treatment of 20 patients with skeletal open bite, aged between 18 and 59 years. Results: The results allow deducing that the compression and traction forces biologically promoted deformation or deflection of the osteocyte network that controls bone design, and these effects involved the external and internal surfaces of the bone, with the formation of new layers, including the cervical portion of the alveolar bone crest. This helps understanding how dental intrusion occurs in intrusive mechanics, whose forces are of inclination rather than intrusion. The root resorptions caused by the use of miniplates were insignificant, due to the more homogeneous distribution of forces in the several teeth simultaneously involved. Conclusion: Imaging studies in CT scans tend to capture in details the subperiosteal and endosteal phenomena of dental intrusion - before and after the application of intrusive mechanics -, in the form of a set of modifications called dental intrusion or intrusive effect .


RESUMO Objetivo: Explicar, biologicamente, alguns dos mecanismos ósseos envolvidos na intrusão, ou efeito intrusivo, de dentes submetidos à correção da mordida aberta esquelética por meio do uso de quatro miniplacas. Métodos: Foram mensurados, em reconstruções 3D de tomografias computadorizadas de feixe cônico, os resultados da intrusão dentária, comparando-se o antes e o depois em 20 pacientes com mordida aberta esquelética, com idades entre 18 e 59 anos. Resultados: Os resultados permitem deduzir que as forças de compressão e de tração promovem, biologicamente, deformação ou deflexão da rede osteocítica controladora do design ósseo, e esses efeitos envolvem as superfícies externas e internas do osso, com formação de novas camadas, incluindo a parte cervical da crista óssea alveolar. Isso ajuda a compreender como ocorre a intrusão dentária nas mecânicas intrusivas cujas forças são de inclinação, e não de intrusão. As reabsorções radiculares promovidas pelo uso de miniplacas são insignificantes, em função da distribuição mais homogênea das forças nos vários dentes simultaneamente envolvidos. Conclusão: Os estudos imagiológicos tendem a captar, nas tomografias, cada vez mais detalhadamente os fenômenos subperiosteais e endosteais da intrusão dentária nos pacientes - antes e depois da aplicação das mecânicas intrusivas -, na forma de um conjunto de modificações que se chama intrusão dentária ou efeito intrusivo.


Assuntos
Humanos , Adolescente , Adulto , Adulto Jovem , Reabsorção da Raiz , Dente , Mordida Aberta/terapia , Procedimentos de Ancoragem Ortodôntica/métodos , Técnicas de Movimentação Dentária/métodos , Pessoa de Meia-Idade
15.
Dental press j. orthod. (Impr.) ; 25(6): 19-25, Nov.-Dec. 2020. graf
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1154054

RESUMO

ABSTRACT Introduction: Teeth frequently fail to erupt and situations arise that prevent the canines from reaching the occlusal plane. Objective: Discourse about the three situations in which the canine does not reach the occlusal plane, and remains unerupted; and at the same time, point how to make a safe diagnosis of alveolodental ankylosis - one of the three causes -, based on tomography. Conclusions: Ankylosis occurs in impacted teeth by atrophy of the periodontal ligament, including the epithelial rests of Malassez. The tomographic signs of alveolodental ankylosis in unerupted canines are the interruption of hypodense periodontal space, discontinuity of the lamina dura and its continuity with the root surface, which gradually loses its regular shape.


RESUMO Introdução: Muitas vezes, a erupção falha, e ocorrem situações que impedem que os caninos cheguem até o plano oclusal. Objetivos: Discorrer sobre quais as três situações nas quais o canino não chega até o plano oclusal, permanecendo não irrompido e, ao mesmo tempo, destacar como se diagnosticar com segurança uma dessas três causas, a anquilose alveolodentária, a partir da tomografia. Conclusões: A anquilose em dentes não irrompidos ocorre pela atrofia do ligamento periodontal, incluindo os Restos Epiteliais de Malassez. Os sinais tomográficos de uma anquilose alveolodentária em caninos não irrompidos são a interrupção do espaço periodontal hipodenso, a descontinuidade da lâmina dura e a sua continuidade com a superfície radicular, que, gradativamente, perde sua regularidade.


Assuntos
Humanos , Dente Impactado , Anquilose Dental , Dente Canino/diagnóstico por imagem , Ligamento Periodontal , Dente Impactado/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Anquilose Dental/diagnóstico por imagem
16.
Dental Press J Orthod ; 25(4): 16-22, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32965382

RESUMO

INTRODUCTION: When miniplates are used as anchoring for orthodontic mechanics for anterior open bite correction by retraction of anterior teeth and posterior teeth intrusion and retraction, orthodontically induced inflammatory external apical root resorption is clinically negligible. METHODS: A homogeneous sample of 32 patients was used, and the roots of the teeth were compared on CT scans performed before and after orthodontic treatment. RESULTS: The observed root resorption was minimal, and this can be explained by the uniform distribution of forces in several teeth, simultaneously, in the set of the dental arch and in the bone that supports the teeth. CONCLUSION: The most important thing to prevent root resorption in orthodontic practice, besides being concerned with the intensity of the applied forces, is to be careful with its distribution along the roots of each tooth, in the dental arch and in the bone that supports the teeth.


Assuntos
Mordida Aberta/diagnóstico por imagem , Mordida Aberta/terapia , Procedimentos de Ancoragem Ortodôntica , Reabsorção da Raiz/diagnóstico por imagem , Reabsorção da Raiz/etiologia , Reabsorção de Dente , Humanos , Técnicas de Movimentação Dentária/efeitos adversos
17.
Dental press j. orthod. (Impr.) ; 25(4): 16-22, July-Aug. 2020. graf
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1133678

RESUMO

ABSTRACT Introduction: When miniplates are used as anchoring for orthodontic mechanics for anterior open bite correction by retraction of anterior teeth and posterior teeth intrusion and retraction, orthodontically induced inflammatory external apical root resorption is clinically negligible. Methods: A homogeneous sample of 32 patients was used, and the roots of the teeth were compared on CT scans performed before and after orthodontic treatment. Results: The observed root resorption was minimal, and this can be explained by the uniform distribution of forces in several teeth, simultaneously, in the set of the dental arch and in the bone that supports the teeth. Conclusion: The most important thing to prevent root resorption in orthodontic practice, besides being concerned with the intensity of the applied forces, is to be careful with its distribution along the roots of each tooth, in the dental arch and in the bone that supports the teeth.


RESUMO Introdução: Quando são utilizadas miniplacas como ancoragem para a mecânica ortodôntica de correção da mordida aberta anterior por meio da retração dos dentes anteriores e intrusão e retração dos dentes posteriores, as reabsorções radiculares apicais externas inflamatórias induzidas ortodonticamente são clinicamente irrelevantes. Métodos: Usou-se uma amostra homogênea de 32 pacientes, e comparou-se as raízes dos dentes em tomografias realizadas antes e depois do tratamento ortodôntico. Resultados: As reabsorções radiculares observadas foram mínimas, e isso pode ser explicado pela distribuição uniforme das forças em vários dentes, simultaneamente, no conjunto da arcada dentária e no osso que suporta os dentes. Conclusão: O mais importante para se prevenir as reabsorções radiculares na prática ortodôntica, além de se preocupar com a intensidade das forças aplicadas, é tomar cuidado com a sua distribuição ao longo das raízes de cada dente, na arcada dentária e no osso que suporta os dentes.


Assuntos
Humanos , Reabsorção da Raiz/etiologia , Reabsorção da Raiz/diagnóstico por imagem , Reabsorção de Dente , Mordida Aberta/terapia , Mordida Aberta/diagnóstico por imagem , Procedimentos de Ancoragem Ortodôntica , Técnicas de Movimentação Dentária/efeitos adversos
18.
Dental Press J Orthod ; 25(6): 19-25, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33503120

RESUMO

INTRODUCTION: Teeth frequently fail to erupt and situations arise that prevent the canines from reaching the occlusal plane. OBJECTIVE: Discourse about the three situations in which the canine does not reach the occlusal plane, and remains unerupted; and at the same time, point how to make a safe diagnosis of alveolodental ankylosis - one of the three causes -, based on tomography. CONCLUSIONS: Ankylosis occurs in impacted teeth by atrophy of the periodontal ligament, including the epithelial rests of Malassez. The tomographic signs of alveolodental ankylosis in unerupted canines are the interruption of hypodense periodontal space, discontinuity of the lamina dura and its continuity with the root surface, which gradually loses its regular shape.


Assuntos
Anquilose Dental , Dente Impactado , Dente Canino/diagnóstico por imagem , Humanos , Ligamento Periodontal , Tomografia Computadorizada por Raios X , Anquilose Dental/diagnóstico por imagem , Dente Impactado/diagnóstico por imagem
19.
Dental press j. orthod. (Impr.) ; 24(6): 20-26, Nov.-Dec. 2019. graf
Artigo em Inglês | LILACS | ID: biblio-1056021

RESUMO

ABSTRACT The starting point for the treatment of unerupted teeth should consider the fact that, biologically, the pericoronal follicle maintains the ability to release EGF and other mediators responsible for eruption over time. The eruptive events may be guided and directed, so that teeth may occupy the space prepared to receive them in the dental arch, as showed in the case presented to evidence the following principle to be considered in these cases: "Regardless of the position of an unerupted tooth, it may be biologically directed to its place in the dental arch. The orthodontist should apply a mechanics to guide it and park it at its site."


RESUMO Os dentes não irrompidos devem ter como ponto de partida, para seu tratamento, o fato de que biologicamente o folículo pericoronário mantém ao longo do tempo a capacidade de liberar o EGF e outros mediadores responsáveis pela erupção. Pode-se guiar e direcionar os eventos eruptivos para que os dentes ocupem o seu espaço preparado para recebê-los na arcada dentária, como revela o caso apresentado para sedimentar o seguinte princípio a ser considerado para esses casos: "Independentemente da posição que um dente não irrompido se apresente, há como, biologicamente, direcioná-lo para o seu local na arcada dentária. Cabe ao ortodontista aplicar uma mecânica que o leve até o local e lá o estacione."


Assuntos
Humanos , Dente Impactado , Dente não Erupcionado , Erupção Dentária , Arco Dental , Ortodontistas
20.
Am J Orthod Dentofacial Orthop ; 155(6): 812-818, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31153501

RESUMO

OBJECTIVE: This study aimed to determine orthodontists' and layperson's perceptions about facial esthetics in a long face pattern sample. METHODS: The sample consisted of 64 frontal photographs of white Brazilian middle school students (9-15 years old), diagnosed as long faced through morphologic evaluation and confirmed by the facial index. A Likert-type scale was used to determine orthodontists' (22) and laypeople's (22) perceptions about facial esthetics. Chi-square and proportions tests were used for comparison between the examiners regarding the classification in each degree of esthetics, adopting a significance level of 5%. RESULTS: For orthodontists and laypeople, most of the subjects were considered to have acceptable appearance: 36.4% and 40.3%, respectively. Subjects whose appearance was classified as unpleasant constituted one-third of the sample: for orthodontists, 7.8% very unpleasant and 22.9% unpleasant, and 6.7% and 22.2%, respectively, for laypeople. The facial structures most cited as responsible for unpleasantness were the lack of lip sealing followed by incisor exposition. The increase of the lower third of the face for orthodontists and eyes for laypeople were the third most cited unpleasant characteristics. CONCLUSIONS: For the evaluators, two-thirds of the long face sample were considered to have an acceptable, pleasant, or very pleasant appearance. Laypeople's opinions aligned with the orthodontists', that one-third of long-face patients were considered to have an unpleasant appearance.


Assuntos
Estética , Face/anatomia & histologia , Adolescente , Brasil , Criança , Feminino , Humanos , Masculino , Fotografação , Sorriso
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