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A lesão de reabsorção dentária consiste em um processo patológico que acomete elementos dentários permanentes, principalmente de animais adultos e idosos, e sua expressão na espécie canina vem aumentando. Etiologias diversas e não esclarecidas, associada ao subdiagnóstico por falta da realização de exames radiográficos na rotina e profissionais não especializados na área odontológica, tem permitido que injúrias na estrutura externa e interna do dente sofram processo reabsortivo por células clásticas. Frequentemente se confunde com a doença periodontal ou a ela está associada. O diagnóstico baseia-se nos achados clínicos e na radiografia intraoral. O tratamento depende do estágio da doença, sendo a exodontia a opção que devolve a qualidade de vida natural ao animal no longo prazo. O presente relato tem como objetivo descrever o caso de um cão da raça Dachshund, com seis anos de idade, inteiro, com queixa de halitose, disfagia, ptialismo, anorexia, desidratação, perda de peso, letargia, meneios de cabeça e espirros, e ao exame de imagem apresentava diversas lesões de reabsortivas, cujo tratamento periodontal promoveu remissão de todos os sinais clínicos e bem-estar ao paciente.

Tooth resorption injury consists of a pathological process that affects permanent dental elements, especially in adult and elderly animals, and its expression in the canine species has been increasing. Several and unclear etiologies, associated with underdiagnosis due to lack of routine radiographic examinations and professionals not specialized in the dental area, have allowed injuries to the external and internal structure of the tooth to undergo a resorptive process by cells clastic. It is often confused with or associated with periodontal disease. Diagnosis is based on clinical findings and intraoral radiography. The treatment depends on the stage of the disease, and tooth extraction is the option that returns the natural quality of life to the animal in the long term. The present report aims to describe the case of a six-year-old Dachshund dog, whole, complaining of halitosis, dysphagia, ptyalism, anorexia, dehydration, weight loss, lethargy, head sneezing and sneezing, and the imaging exam presented several resorptive lesions, whose periodontal treatment promoted remission of all clinical signs and well-being to the patient.

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INTRODUCTION: The treatment of impacted and transposed teeth is a challenge for clinical practice. A precise assessment of the relative position of the transposed tooth could lessen the risks of adverse effects, such as root resorption and periodontal problems. DESCRIPTION OF THE CASE: An 18-year-old patient went to the Orthodontic Department of the Federal University of Juiz de Fora, Brazil for a re-evaluation of the orthodontic treatment to which she had been receiving since the age of 12. Attempted traction of an impacted maxillary canine resulted in root resorption, marked mobility and alteration in the position of adjacent teeth as well as loss of alveolar bone in the anterior region of the maxilla. This tooth was not only partially transposed, but it also had ankylosis, external and internal tooth resorption, which indicated the need for tooth extraction. A change was made to the treatment plan, with the extraction of the canine, bone graft and mesial movement of the posterior teeth. RESULTS: All the spaces were closed at the end of treatment, with normal overbite and overjet. At the follow-up, the teeth position, the shape of dental arches, disocclusion guides and dental occlusion were preserved. The bone graft in the maxilla showed height and mineral density stability. CONCLUSION: The presence of the maxillary permanent canines in the dental arch is important for both aesthetics and a functional occlusion. However, despite the importance of their maintenance in the arch, it is well advised that each case be analysed individually.

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ABSTRACT Caries is a multifactorial disease due to the imbalance of the de/re-mineralization process. Complementary radiographic examinations are able to detect hidden caries. The purpose of this short communication was to investigate the radiolucent image suggestive of hidden caries in lower third molar. The extraction of the tooth, decalcification, inclusion and preparation were performed for histological analysis of the lesion. Histological findings revealed a pre-eruptive resorption, and the etiological factors of this coronary resorption were undefined. The professional should be aware of the occurrences of these lesions to early diagnose and propose appropriate treatment to avoid future complications to the patient.

RESUMO A cárie é conceituada como uma doença multifatorial condicionada ao desequilíbrio no processo de desmineralização e remineralização das estruturas dentárias. O propósito desse trabalho foi investigar a imagem radiolúcida sugestiva de cárie oculta em terceiro molar. Foi realizado a exodontia do elemento dentário, descalcificação e confecção de lâminas para posterior estudo histológico da lesão. O achado histológico conclui-se tratar de uma reabsorção pré-eruptiva. O profissional deve estar atento às ocorrências dessas lesões para diagnosticar precocemente e propor o tratamento adequado, evitando complicações futuras ao paciente.

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Abstract Objective: To compare the accuracy of periapical radiography (PR) and cone-beam computed tomography (CBCT) for the detection of external apical root resorption (EARR) due to root canal contamination. Material and Methods: Dog's teeth with experimentally induced root resorption due to root canal contamination underwent or not root canal treatment (n=62). True positives (TP), false positives (FP), true negatives (TN), and false negatives (FN) in PR and CBCT diagnoses were determined using histopathologic findings as the gold standard. Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and diagnostic accuracy (TP + TN) in the diagnosis of EARR were calculated. Data were compared using chi-squared test (α=0.05). Results: EARR was detected in 35% of roots by PR, in 47% by CBCT, and in 50% of the roots by microscopy (p=0.03 PR versus microscopy; p=0.67 CBCT versus microscopy). Overall, CBCT produced more accurate diagnoses than PR (p=0.008). PR and CBCT allowed the identification of large resorption in 100% of the cases and showed the same accuracy. However, for small resorptions, PR showed an accuracy of 0.83, whereas CBCT showed an accuracy of 0.96 (p=0.003). Conclusion: Cone-beam computed tomography showed higher accuracy in detecting external apical root resorption of endodontic origin.

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Abstract: The understanding of the biological mechanisms involved in root resorption in deciduous teeth is important to the future development of preventive measures and treatments of this condition. The aim of the present study was to compare the expression and immunostaining of iNOS, MMP-9, OPG and RANKL in the periodontal ligament (PDL) of deciduous teeth with physiologic root resorption (GI), inflammatory pathological root resorption (GII) and permanent teeth (GIII), the negative control. Teeth in GI (n = 10), GII (n = 10) and (GIII) (n = 10) were submitted to immunohistochemical analysis to determine the expression of iNOS, MMP-9, OPG, and RANKL. The immunostaining was analysed by optical density. Statistical analysis included one-way ANOVA, followed by Student-Newman-Keuls post hoc test (p < 0.05). The results showed that iNOS, MMP-9 and RANKL expression in the PDL was higher in GII compared to GI and GIII (p < 0.05). Moreover, RANKL expression was higher in GI compared to GIII (p < 0.001), while OPG immunolabelling was lower in GII compared to GI and GIII (p < 0.001). The PDL of deciduous teeth bearing inflammatory processed exhibited upregulation of resorption-associated factors as well as enzymes related to tissue degradation which, in turn explains the exacerbation and greater susceptibility of those teeth to root resorption process.

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External cervical resorption (ECR) is a pathology that is difficult to diagnose early, and because it is often confused with root decay, it can be treated inadequately and even result in tooth loss. Currently, treatment does not have a defined protocol, being widely varied in the literature. This article proposes that cases of ECR should be treated individually, following different criteria, based on aspects related to the patient and the tooth involved. Furthermore, this work illustrates, through a case report, how a patient can present unique characteristics that require treatment to be case-dependent and should be discussed among a multidisciplinary team.

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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.

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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.

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ABSTRACT Endodontically treated teeth may be moved, as endodontic treatment is not a contraindication for orthodontic treatment. Apical periodontal repair begins when the periapical or pulp lesion has completely resolved. This may happen immediately after treatment if the filling material causes little or no irritation of periapical tissues, and particularly if the material is fully contained within the canal. When it leaks, a foreign body granuloma forms and persists for some months or indefinitely, depending on the composition of the filling material. Materials containing calcium hydroxide with no resin components undergo phagocytosis and disappear in some months, as macrophages gradually remove them. Materials containing resins, silicone, ionomers, zinc oxide-eugenol, bioceramics or gutta-percha remain in the site and induce the formation of foreign body granulomas. Although this does not preclude tooth movement, patients should be followed up every three months using periapical images to control the position of the material in relation to the tooth apex. "Pseudo" overfilling may be avoided if permanent filling is delayed until the time when orthodontic treatment is completed.

RESUMO Os dentes tratados endodonticamente podem ser movimentados, e não representam contraindicação para o tratamento ortodôntico. O reparo periodontal apical se inicia a partir do momento em que a causa da lesão pulpar e/ou periapical é eliminada. Isso ocorre de maneira imediata se o material obturador for pouco ou nada agressivo aos tecidos periapicais, especialmente se estiver limitado ao canal. Quando extravasado, haverá a formação de granuloma do tipo corpo estranho por alguns meses ou permanentemente, dependendo da composição do material obturador. Os materiais à base de hidróxido de cálcio sem componentes resinosos são fagocitáveis e, em alguns meses, desaparecem do local, pois os macrófagos irão gradativamente removê-los. Os materiais à base de resina, silicone, ionômero, óxido de zinco e eugenol, biocerâmicos e guta-percha permanecerão no local, induzindo granulomas periapicais do tipo corpo estranho, o que não inviabiliza a movimentação dentária, mas devem ser acompanhados a cada três meses com imagens periapicais, para um controle de sua relação espacial com o ápice dentário. A "pseudossobreobturação" pode ser evitada se a obturação definitiva for postergada para quando o tratamento ortodôntico terminar.

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ABSTRACT The replacement of natural teeth that have extreme external apical root resorption, induced by orthodontic treatment, with osseointegrated implants is not justifiable biologically or clinically. These teeth should be preserved and keep their normal functions, as there is no greater mobility, pain or color change. They may undergo usual procedures, such as bleaching, restorations with veneers and other esthetic procedures that may be necessary along life. The pulp of these teeth is normal. If mobility of a tooth with extreme resorption is identified, the cause of mobility should be investigated, as it is not associated with resorption, not even at advanced stages. Tooth mobility may be associated with recent removal of orthodontic appliance, occlusal trauma, chronic inflammatory periodontal disease, or even severe cervical bone loss. In such cases, the cause of mobility should be eliminated and possible sequelae should be corrected, because these, and not root resorption, may actually require retention.

RESUMO A troca de dentes naturais com reabsorções inflamatórias externas apicais extremas, induzidas ortodonticamente, por implantes osseointegráveis não se justifica, biológica ou clinicamente. Esses dentes devem ser mantidos, cumprindo suas funções normais, pois não apresentam aumento de mobilidade, nem dor ou alteração de cor, podendo ser submetidos a procedimentos comuns, como clareamento, facetas e outras abordagens estéticas necessárias ao longo da vida. A polpa desses dentes é normal. Se os dentes com reabsorção extrema se apresentarem com mobilidade, deve-se buscar a causa dessa mobilidade, que não está associada à reabsorção, mesmo quando avançada. A mobilidade dentária deve estar relacionada com a recente remoção do aparelho ortodôntico, trauma oclusal, doença periodontal inflamatória crônica ou, ainda, com perda óssea cervical severa. Nesses casos, para eliminar a mobilidade, deve-se eliminar a causa e corrigir as sequelas, que - essas sim - podem necessitar de contenção, mas não pela reabsorção radicular.

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ABSTRACT Knife-edge or blunt root resorptions characterize ameloblastomas and are pathognomonic for this tumor, because they differentiate ameloblastomas from simple bone cysts, odontogenic keratocysts and nasopalatine duct cysts, which do not lead to resorption of involved teeth. Despite the very high frequency and importance of these characteristics for a differential diagnosis, a microscopic examination should also be conducted before defining the diagnosis and the treatment plan for these cases. This paper describes a six-step hypothesis to explain the mechanism by which ameloblastomas promote the characteristic root resorptions found in association with these benign epithelial tumors, which have a fibrous capsule formed by islands and epithelial cords that mimic the dental lamina, invade neighboring tissues and release mediators (IL-1, EGF) of tooth and root resorption. This hypothesis may be one more explanation for the tooth resorptions sometimes found in orthodontic records, and may help differentiate the root resorptions that are specific to the orthodontic practice.

RESUMO As reabsorções radiculares "em plano" ou "em corte" são características do ameloblastoma e foram consideradas patognomônicas dessa lesão, diferenciando-o do cisto ósseo simples, queratocisto odontogênico e do cisto nasopalatino - nos quais elas estão ausentes, nos dentes envolvidos. Apesar dessa frequência elevadíssima e importante no diagnóstico diferencial, não se pode dispensar o exame microscópico, para um diagnóstico definitivo, no planejamento terapêutico do caso. Elaborou-se uma hipótese com seis passos para explicar o mecanismo pelo qual o ameloblastoma promove essa típica reabsorção radicular peculiar da lesão: ser uma neoplasia epitelial benigna sem cápsula fibrosa, formada por ilhotas e cordões epiteliais que imitam a lâmina dentária e invadem os tecidos vizinhos, liberando mediadores (IL-1, EGF) da reabsorção óssea e dentária. Essa hipótese ajuda a explicar mais uma das causas de reabsorções dentárias que podem estar presentes nas análises das documentações ortodônticas, ajudando a diferenciar as reabsorções radiculares próprias da prática ortodôntica.

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Objetivo: este estudo reporta um caso clínico de reabsorção radicular interna em um dente com necrose pulpar que foi submetido ao tratamento endodôntico no qual, na fase de preparo químico-mecânico, foi utilizada uma técnica suplementar de irrigação com o instrumento XP-Endo Finisher. Métodos: após radiografia para diagnóstico e realização dos testes semiotécnicos, fez-se a instrumentação com sistema Protaper Universal, ativação da substância irrigadora utilizada (digluconato de clorexidina a 2%), com o sistema XP-Endo Finisher, remoção da smear layer, com EDTA a 17% ativada com o mesmo sistema, inserção de medicação intracanal Calen, com paramonoclorofenol, e selamento provisório da coroa dentária, com coltosol. Na segunda sessão, realizou-se a obturação utilizando a técnica de Schilder associada à técnica híbrida de Tagger. Conclusão: o sistema XP-Endo Finisher se mostrou eficaz como técnica suplementar de irrigação, capaz de favorecer a limpeza do sistema de canais radiculares (AU)..

Objective: This study presented a case of internal root resorption in a tooth with pulp necrosis that was submitted to endodontic treatment. In this treatment, an additional irrigation technique with a XP-Endo Finisher instrument was used during the chemical-mechanical preparation. Methods: After radiographic diagnostics and semi-technique tests, instrumentation was performed with Protaper universal system, activation of irrigation solutions, 2% chlorhexidine digluconate with the XP-Endo Finisher file, removal of the smear layer with EDTA 17% activated with the same system, intracanal medication Calen with paramonochlorophenol, temporary sealing of the tooth crown with Coltosol. In the second session, an obturation procedure was performed using the Schilder technique associated with the Tagger hybrid technique. Conclusions: The XP-Endo Finisher system was effective as supplementary irrigation technique and it facilitated the cleaning of the root canal system (AU).

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Introducción: Dentro del marco de su actividad profesional el estomatólogo se enfrenta a diversas afecciones como la reabsorción radicular interna, cuyos casos avanzados pueden complicar el pronóstico del tratamiento endodóntico, debido al debilitamiento de la estructura dental remanente y las posibles afectaciones periodontales. Debido a que la boca está localizada en uno de los puntos focales de la cara, cualquier alteración en la apariencia estética puede provocar implicaciones psicológicas que pueden ir desde una simple forma de esconder el defecto hasta la más grande introversión. Objetivo: Presentar un caso clínico de reabsorción dentaria interna resuelto con implante postextractivo de carga inmediata. Presentación de caso: Paciente femenina de 31 años con reabsorción dental interna de incisivo central superior. Se llevó a cabo un adecuado diagnóstico y plan de tratamiento del caso, colocándose un implante transalveolar cargado de forma inmediata y la rehabilitación definitiva metalcerámica una vez concluida la fase de osteointegración. Conclusiones: Se consiguió una rehabilitación estética, funcional y biomecánicamente estable a largo plazo, que coincide con las expectativas del paciente, lo cual demuestra que cuando se cumplan los requisitos adecuados y la planificación sea exhaustiva, la implantología ofrece el tratamiento más avanzado en casos en que es inminente la extracción dental(AU)

Introduction: In their daily professional practice dentists are faced with a variety of conditions. An example is internal root resorption, the advanced stage of which may complicate the prognosis of dental treatment, due to the weakening of the remnant dental structure and the potential appearance of periodontal disease. Because the mouth is located in one of the focal points of the face, any alteration of its esthetic appearance may result in psychological disorders ranging from a simple attempt to mask the defect to the greatest introversion. Objective: Present a clinical case of internal tooth resorption solved with a post-extraction immediate load implant. Case presentation: A female 31-year-old patient presents with internal tooth resorption of the maxillary central incisor. Appropriate diagnosis was performed and a treatment plan devised, consisting in immediate placement of a transalveolar implant and definitive metal-ceramic rehabilitation upon completion of the osseointegration stage. Conclusions: Stable long-term esthetic, functional and biomechanical rehabilitation was achieved which met the patient's expectations. This result shows that when the established requirements are complied with and exhaustive planning is performed, implantology offers the most advanced treatment when dental extraction is imminent(AU)

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De acordo com a Associação Americana de Endodontistas (AAE), reabsorção dentinária é definida como uma condição fisiológica ou patológica resultante de perda de dentina, cemento e/ou osso. As reabsorções internas, quando detectadas precocemente, apresentam um bom prognóstico a longo prazo, sendo indicada a realização do tratamento endodôntico de forma imediata para limitar seu avanço. A área de reabsorção torna difícil a completa limpeza e obturação hermética do espaço do canal. O instrumento XP-Endo Finisher é indicado em protocolos finais de desinfecção, pois respeita a anatomia original do canal radicular e promove a limpeza de suas irregularidades. Neste sentido, o objetivo do presente trabalho é relatar o tratamento endodôntico em um incisivo central inferior com reabsorção dentinária interna, no qual o instrumento XP-Endo Finisher foi utilizado. Paciente PMS, gênero masculino, 78 anos, foi encaminhado para fazer o tratamento endodôntico no dente 41 que apresentava uma reabsorção dentinária interna e lesão periapical. O tratamento endodôntico incluiu a instrumentação do canal radicular com os instrumentos Reciproc, irrigação com NaOCl 2,5%, medicação com hidróxido de cálcio e ativação complementar com o instrumento XP-Endo Finisher. Após 1 ano de acompanhamento, verifica-se que o dente apresenta função mastigatória normal, estando o paciente assintomático. Radiograficamente, observa-se reparo ósseo periapical, indicando sucesso na terapia endodôntica adotada. A partir do presente relato de caso, concluiu-se que a utilização do instrumento XP-Endo Finisher é uma alternativa viável para complementar o preparo dos canais radiculares em dentes com reabsorção dentinária interna (AU).

According to the American Association of Endodontists (AAE), dentin resorption is defined as a physiological or pathological condition resulting from loss of dentin, cementum and/or bone. Internal resorptions, when detected early, present good long-term prognosis, and endodontic treatment is indicated immediately to limit its progress. The reabsorption area makes it difficult to complete root canal cleaning and hermetic sealing. The XP-Endo Finisher file is indicated for final disinfection protocols, since it respects root canal original anatomy and promotes cleaning of its irregularities. In this sense, the objective of the present study is to report the endodontic treatment in a lower central incisor with internal dentin resorption in which XP-Endo Finisher file was used. Patient PMS, male, 78 years old, was referred to perform endodontic treatment on tooth 41 that presented internal dentin resorption and periapical lesion. The endodontic treatment included root canal instrumentation with Reciproc files, irrigation with NaOCl 2.5%, calcium hydroxide medication, and complementary activation with the XP-Endo Finisher file. After 1-year follow-up, the tooth presented normal masticatory function, and the patient was asymptomatic. Radiographically, periapical bone repair was observed, indicating success in the adopted endodontic therapy. From the present case report, we may conclude that the use of the XP-Endo Finisher file is a viable alternative to complement root canals preparation in teeth with internal dentin resorption (AU).

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ABSTRACT Pre-eruptive intracoronal resorption (PIR) is a rare lesion that occurs within the dentin of the crown on unerupted teeth. The aim of this article is to report two rare cases of a PIR in impacted canine using cone beam computed tomography (CBCT). High resolution CBCT images (Prexion 3D) were indicated for evaluating of the non-erupted tooth, claiming no other related signs or previous historyto be considered. In the first case, the images revealed an impacted and mesioinclined superior canine. In the coronary portion, it was observed an irregular hypodense lesion, involving the dentin, enamel tissue, and communication with the external surface of the tooth. In the second case, the images showed an impacted superior canine in the vertical position. It also revealed a hypodense lesion with poorly defined limits envolving the dentin, which extends over the crown. In both cases, the tooth was not in contact with the adjacentlateral tooth. Therefore, PIR in impacted teeth is rare, which is frequently diagnosed through routine radiographs. Additionally, CBCT seems to be an invaluable tool for providing accurate information about the exact topography, relationships with adjacent structures, helping, therefore, on the appropriate treatment planning.

RESUMO A reabsorção intra-coronária pré-eruptiva (RIP) é uma alteração rara que ocorre na coroa de dentes não erupcionados. O objetivo desse trabalho é documentar dois casos raros de RIP em caninos inclusos nas imagens de tomografia computadorizada de feixe cônico (TCFC). As imagens de TCFC de alta resolução (Prexion 3D) foram solicitadas cuja indicação era avaliação topográfica de dente não irrompido alegando nenhuma outra causa relacionada ou história pregressa a ser considerada. Caso 1: As imagens apresentaram o dente 23 incluso e mesioangulado. Na porção coronária observa-se imagens hipodensas irregulares abrangendo o tecido dentinário, esmalte e comunicação com a superfície externa do dente. Caso 2: As imagens apresentaram o dente 13 incluso em posição vertical.Imagem hipodensa e de limites pouco definidos, que se estende por quase toda coroa e acomete principalmente a dentina. Ambos os casos não apresentavam íntimo contato com o dente lateral adjacente. Portanto, pode concluir, que a reabsorção coronária de dentes totalmente inclusos é um achado raro de etiologia desconhecida, onde a TCFC é um instrumento de grande valia para fornecerinformações da exata topografia, relações com estruturas adjacentes, e auxílio para o correto planejamento do tratamento. Portanto, RIP em dentes impactados é raro, o que é frequentemente diagnosticado através de radiografias de rotina. Além disso, CBCT parece ser uma ferramenta inestimável para fornecer informações precisas sobre a topografia exata, relações com estruturas adjacentes,ajudando, portanto, no planejamento do tratamento adequado.

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Pre-eruptive intracoronal radiolucency (PECR) is characterized by the existence of a radiographic radiolucent area inside the coronal dentin prior to dental eruption. It is a rare clinical entity of unknown etiology, usually asymptomatic and diagnosed through routine radiographs. The aim of this article is to report the treatment of a PECR in an 8-year-old girl. Surgical procedure to expose the crown was conducted; upon tooth eruption, the radiolucent lesion was accessed and the tooth was restored. The case has an 18-month follow-up and emphasis on aspects linked to diagnosis and clinical approach was discussed. How to cite this article: Ilha MC, Kramer PF, Ferreira SH, Ruschel HC. Pre-eruptive Intracoronal Radiolucency in First Permanent Molar. Int J Clin Pediatr Dent 2018;11(2):151-154.

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OBJECTIVE: This study aimed to identify possible associations of the presence or absence of posttrauma sequelae with the factors inherent to the traumatized tooth and treatment. MATERIALS AND METHODS: This retrospective study was performed through the evaluation of records and radiographs of a center of reference for dental trauma between January 2008 and December 2014. The factors were analyzed and associated with posttrauma sequelae, such as pulp necrosis and root resorption. STATISTICAL ANALYSIS USED: A binomial logistic regression model was fit (P < 0.05). RESULTS: In luxations, it was possible to observe 37% pulp necrosis, 16% inflammatory root resorption, and 8% replacement resorption. The binomial logistic regression revealed that male gender (P = 0.0392, odds ratio [OR] = 2.79), avulsion injury (P = 0.0009, OR = 12.27), and elapsed time >16 days between the time of trauma to the beginning of the endodontic treatment (P = 0.0450, OR = 7.53) showed a greater chance of presenting a posttrauma complication. CONCLUSIONS: Gender, type of injury, stage of root development, and time after trauma until the beginning of the endodontic intervention were related to the appearance of sequelae.

RESUMO

ABSTRACT Pre-interruptive intracoronal resorption is a radiolucent lesion localized in dentin, immediately below the amelodentin junction of unerupted teeth. It is rare, asymptomatic, and of idiopathic etiology, generally diagnosed in routine radiographs or in those for orthodontic purposes. A conservative approach, with radiographic follow-up is the treatment recommended until the tooth erupts, and then the intervention is made. However, in cases with symptoms or progression of the lesion, surgical intervention is advisable. To report a case of pre-interruptive intracoronal resorption, with a conservative approach, showing the clinical and radiographic follow-up of this condition. The patient, a nine-year-old Caucasian girl, presented to the Dental Clinic for routine examination. An initial panoramic radiograph was requested, which showed an intracoronal radiolucence in tooth 45 that had not yet erupted. Clinical and radiographic follow-up was made until the affected tooth was completely established in the oral cavity. The treatment recommended for pre-interruptive intracoronal resorption is to have knowledge of the phenomenon, associate its probable etiology and radiographic aspect, as well as its prevalence, occurrence and treatment options, by considering a conservative approach when there are no symptoms.

RESUMO A reabsorção intracoronária pré-eruptiva é uma lesão radiolúcida localizada na dentina, logo abaixo da junção amelo-detinária de dentes não irrompidos. É rara, assintomática e de etiologia idiopática, geralmente diagnosticada em exames radiográficos de rotina ou com fins ortodônticos. Uma abordagem conservadora com acompanhamento radiográfico é o tratamento recomendado até que o dente erupcione para ser feita a intervenção. Porém, em casos de sintomatologia ou progressão da lesão, aconselha-se a intervenção cirúrgica. Objetivo: Relatar o caso de reabsorção intracoronária pré-eruptiva, com uma abordagem conservadora mostrando a o acompanhamento clínico e radiográfico periódico desta condição. Paciente, sexo feminino, nove anos de idade, caucasiana, que compareceu a Clínica Odontológica para exame de rotina. Foi solicitada uma radiografia panorâmica inicial, sendo evidenciada uma radioluscência intracoronária no dente 45 ainda não erupcionado. Foi feito uma acompanhamento clínico e radiográfico até na total estabelecimento do dente acometido na cavidade oral. Conhecer a reabsorção intracoronária pré-eruptiva, associando sua provável etiologia e aspecto radiográfico, bem como sua prevalência e ocorrência e opções de tratamento, considerando uma abordagem conservadora, quando não houver sintomatologia, como tratamento recomendado.

RESUMO

Avulsão é uma injúria severa que causa danos ao tecido dentário e de suporte, e ocorre principalmente nos incisivos superiores. A anquilose, a reabsorção por substituição e a infra-oclusão são sequelas, frequentemente, detectadas após o reimplante de um dente avulsionado em condições não ideais. O objetivo deste trabalho foi descrever a conduta clínica frente a um incisivo central superior esquerdo (21) avulsionado, reimplantado e procurado atendimento após cinco dias. Menino de 8 anos procurou atendimento juntamente com sua mãe, no Centro Especializado de Traumatismo Dentário, após queda de bicicleta. O dente avulsionado foi armazenado a seco e o reimplante foi realizado 3 horas, após a avulsão. Iniciou-se o tratamento endodôntico 12 dias após o acidente e foram realizadas trocas mensais de medicação a base de hidróxido de cálcio durante 8 meses. Seis meses após o término da obturação do dente 21, observou-se aquilose alvéolo-dentária e reabsorção radicular por substituição. Devido ao crescimento ósseo do paciente, após dois anos e 6 meses do traumatismo, observou-se que o dente 21 estava em infra-oclusão. Optou-se pela restauração direta deste dente com resina composta, para deixar o sorriso mais agradável, esteticamente, e evitar a extração, mantendo o dente natural o maior tempo possível, para posteriormente em fase adulta ser submetido à exodontia e colocação de implante. Concluiu-se que de acordo com o prognóstico desfavorável o paciente teve a recuperação de sua autoestima, e o dente encontra-se em posição, função e esteticamente harmônico; e será preservado em estrutura óssea para posterior colocação de implante. (AU)

Tooth avulsion is a severe injury that causes damage to dental and support tissue, and occurs mainly in the upper incisors. Ankylosis, replacement resorption and often infraocclusion are detected sequelae after reimplantation of an avulsed tooth in less than ideal conditions. The aim of this study was to describe the clinical management facing a left maxillary central incisor (21) avulsed, replanted and sought treatment after 5 days. Eight-year-old boy sought treatment along with his mother in the Specialized Center of Dental Trauma after bicycle fall. The avulsed tooth was stored dry and reimplantation was performed 3 hours after avulsion. 12 days after the accident the endodontic treatment was initiated and monthly exchange medication was carried out with calcium hydroxide base during 8 months. Six months after the obturation of the tooth 21, there was ankylosis and root replacement resorption. Due to the patient's bone growth after 2 years and 6 months of injury, it was noticed that the tooth 21 was in infraocclusion. It was opted for the direct restoration of this tooth with composite resin, to make the most aesthetically pleasing smile and avoid extraction, keeping the natural tooth as long as possible, later in adulthood to be subjected to extraction and implant placement. It was concluded that in accordance with the unfavorable prognosis patients recovered their self-esteem, and the tooth is in position, function and aesthetically harmonious; and the bone structure will be preserved for later implant placement. (AU)