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1.
Rev. Ciênc. Méd. Biol. (Impr.) ; 20(2): 240-244, set 29, 2021. fig, tab
Article in Portuguese | LILACS | ID: biblio-1354433

ABSTRACT

Introdução: a detecção da reabsorção da raiz dentária é realizada por meio de exames de imagens, pois frequentemente não apresenta sinal e sintoma clínicos. Dentre os exames de imagem disponíveis, o exame radiográfico periapical, é indicado para diagnóstico, prognóstico e acompanhamento da reabsorção radicular. Objetivo: o estudo tem como objetivo investigar a relação de diferentes resoluções espaciais com o diagnóstico de reabsorção radicular. Metodologia: foram realizados desgastes simulando reabsorção externa no terço apical e vestibular de 15 (quinze) incisivos inferiores, radiografados em crânio seco, antes e depois do desgaste. A técnica radiográfica foi realizada utilizando o sistema VistaScan (Durr Dental, Bietigheim-Bissingen, Germany), aparelho CS 2200 (Carestream Dental LLC, Atlanta-GA, USA) usando tempo de exposição de 0,15 segundos e escaneadas sob diferentes protocolos de resolução espacial, a saber, 20 pares de linhas por milímetro (pl/mm) e 40 pl/mm. Posteriormente dois avaliadores experientes fizeram análises das referidas imagens sem conhecimento prévio da resolução de escaneamento. Resultados: 75% das radiografias realizadas com 20 pl/mm foram classificadas como excelentes pelos avaliadores, contra 33% com 40 pl/mm, estatisticamente significativa. Discussão: ao avaliar a reabsorção radicular, obteve-se uma acurácia diagnóstica igual para os dois protocolos sem distinção, estatisticamente significativa, entre localização ou profundidade. Conclusão: tendo em vista que para os examinadores imagens com 20 pl/mm foram satisfatórias, com percentual de qualidade maior quando comparado a imagens obtidas com 40 pl/ mm, este estudo indica o emprego de imagens com 20 pl/mm para avaliação inicial de suspeita de reabsorções nas raízes dentárias.


Introduction: the detection of tooth root resorption is carried out by means of imaging tests, as it often does not present a clinical sign and symptom. Among the imaging tests available, the periapical radiographic examination is indicated for diagnosis, prognosis and monitoring of root resorption. Objective: the study aims to investigate the relationship of different spatial resolutions in the diagnosis of root resorption. Methods: Artificial external root resorptions were simulated using burs by drilling to the entire depth in different locations at the apical and buccal thirds of 15 (fifteen) lower incisors were worn, radiographed on a dry skull, before and after wear. The radiographic technique was performed using the VistaScan system (Durr Dental, Bietigheim-Bissingen, Germany), CS 2200 device (Carestream Dental LLC, Atlanta-GA, USA) using an exposure time of 0.15 seconds and scanned under different resolutions protocols, namely, 20 pairs of lines per millimeters (pl/mm) and 40 pl/mm. Subsequently, two experienced evaluators performed analyzes of these images without prior knowledge of the scanning resolution. Results: seventy-five percent of the radiographs taken at 20 pl/mm were rated as excellent by the evaluators, against 33% at 40 pl/mm, a statistically significant difference. Discussion: When assessing root resorption, a similar diagnostic accuracy was obtained for the two protocols without a statistically significant distinction between location or depth. Conclusions: Considering that for examiners images with 20 pl/mm were satisfactory, with a percentage of quality greater than 40 pl/mm, this study indicates the use of 20 pl/mm for initial evaluation of suspected root resorption.


Subject(s)
Humans , Root Resorption , Tooth Root , Diagnostic Imaging , Radiography, Dental, Digital , Research , Dimensional Measurement Accuracy , Incisor
2.
Rev. Asoc. Odontol. Argent ; 109(2): 91-99, ago. 2021. ilus
Article in Spanish | LILACS | ID: biblio-1348398

ABSTRACT

Objetivo: Describir el tratamiento endodóncico de cuatro casos clínicos de reabsorción radicular desarrollada durante o tras un tratamiento ortodóncico. Casos clínicos: Después de la preparación y la desinfección de los conductos radiculares, estos fueron obturados por un tiempo prudencial con una medicación intraconducto de hidróxido de calcio, que luego fue reemplazada por MTA. Luego de un período de entre uno y cuatro años, según el caso, los tratamientos fueron evaluados clínica y radiográficamente. Los dientes que debieron ser extraídos fueron analizados histológicamente. Según la evolución clínica y radiográfica de los casos presentados, el uso inicial de hidróxido de calcio y su posterior reemplazo por MTA parecería ser un protocolo adecuado para completar el proceso de reparación de los tejidos apicales y perirradiculares en casos de reabsorciones radiculares provocadas por fuerzas ortodóncicas excesivas. Las enfermedades sistémicas deben ser tenidas en cuenta para la elección de la terapéutica (AU)


Aim: To describe the endodontic treatment of four clinical cases of permanent teeth suffering root resorption during or after orthodontic treatment. Clinical cases: Four clinical cases of permanent teeth with root resorption were endodontically treated. After the root canals were prepared and disinfected, they were medicated with calcium hydroxide. After an appropriate observation period, the canals were finally filled with MTA. The treatment outcomes were clinically and radiographically assessed at an interval between one to four years according to the clinical case. The histological findings of teeth that required extraction was also described. Our clinical and radiographic observations suggest that a temporary filling with calcium hydroxide and further obturation with MTA can provide a favorable intracanal environment for apical and periradicular tissue reparation. The clinician needs a full medical history to be aware of the systemic diseases in patients with root resorption that will be of importance for the proper selection of treatment (AU)


Subject(s)
Humans , Male , Child , Adolescent , Orthodontics, Corrective/adverse effects , Root Canal Filling Materials , Root Resorption , Calcium Hydroxide , Periapical Tissue , Wound Healing/physiology , Clinical Protocols , Treatment Outcome , Tooth, Nonvital/diagnostic imaging
3.
Rev. Odontol. Araçatuba (Impr.) ; 42(2): 9-17, maio-ago. 2021. ilus
Article in Portuguese | LILACS, BBO | ID: biblio-1252898

ABSTRACT

As reabsorções radiculares são classificadas em interna e externa e um correto diagnóstico é fundamental para o sucesso no tratamento e é de suma importância que a resolução clínica seja feita precocemente para que se tenha um prognóstico clínico favorável. Reabsorção interna não é comum em dentes permanentes, e seu processo se caracteriza por um aumento do canal radicular de forma oval. O presente estudo teve como objetivos demonstrar e descrever através de um relato de prontuário o tratamento de reabsorção radicular interna de incisivos superiores permanentes. Através da seleção de uma paciente pela disciplina de Triagem da clínica odontológica do Centro Universitário da Serra Gaúcha, a qual apresentou alterações radiográficas compatíveis com reabsorção radicular interna inflamatória na região de dois incisivos superiores permanentes, com lesão periapical estabelecida em ambos, concluiu-se o tratamento para então gerar este estudo do tipo retrospectivo observacional. A reabsorção quando não tratada pode avançar e envolver estruturas além do tecido conjuntivo inflamado e a lesão pode avançar em direção apical. Após estabelecido o diagnóstico, iniciou-se os tratamentos endodônticos dos elementos utilizando hidróxido de cálcio como medicação intracanal, após as trocas de medicações as reabsorções foram controladas e então, as obturações dos canais foram realizadas, buscando um preenchimento adequado para o caso. A reabsorção radicular interna inflamatória causa danos irreversíveis, mas seu processo foi controlado através de terapia endodôntica. Este desempenho é considerado uma patologia, e pode comprometer qualquer extensão da raiz, é comum que os casos permaneçam assintomáticos, portanto, deve ser tratado o mais breve possível assim que descobertos para evitar sua progressão, e consequentemente danos maiores(AU)


Root resorption is classified as either internal or external, and a correct diagnosis is essential for successful treatment. Internal resorption is not common in permanent teeth, and its process is characterized by an enlarged oval root canal. The present study aims to demonstrate and describe, through a medical record, the treatment of internal root resorption of permanent upper incisors. A patient was selected from the Triage Course of the Dental Clinic (Centro Universitário da Serra Gaúcha) who presented radiographic changes associated with inflammatory internal root resorption in two permanente upper incisors, with a periapical lesion established in both and a treatment was then carried out in order to generate this retrospective observational study. Resorption when left untreated can progress and involve structures beyond the inflamed connective tissue and the lesion can advance in the apical direction. After the diagnosis was confirmed, endodontic treatments were initiated using calcium hydroxide as an intracanal medication. After changing the medication, the resorption was controlled and then the canal fillings were performed, seeking an adequate filling for the case. Inflammatory internal root resorption causes irreversible damage, but its process has been controlled through endodontic therapy. This performance is considered a pathology, and can compromise any extension of the root, it is common for the cases to remain asymptomatic, therefore, it should be treated as soon as it's discovered to prevent its progression, and consequently greater damage(AU)


Subject(s)
Humans , Female , Adult , Root Canal Therapy , Root Resorption , Root Resorption/therapy , Incisor , Calcium Hydroxide , Dentition, Permanent , Tooth, Nonvital , Dental Pulp Cavity
4.
Rev. Fac. Odontol. (B.Aires) ; 36(84): 55-61, 2021. ilus, tab
Article in Spanish | LILACS | ID: biblio-1367788

ABSTRACT

El objetivo fue evaluar radiográficamente las alteraciones dentarias en piezas sometidas a fuerzas ortodóncicas. Se analizaron 2871 piezas dentarias por observación radiográfica pre y post tratamiento. Variables registradas: sexo, edad, tipo de alteración, pieza dentaria y grado de reabsorción. Se calcularon intervalos de confianza 95% por método score de Wilson. Se utilizó prueba de bondad de ajuste Chi cuadrado, comparando frecuencias observadas con frecuencias esperadas bajo independencia. Se utilizó prueba de diferencia de proporciones, estadístico de Fisher y prueba Chi-cuadrado de asociación. Se concluyó que las alteraciones dentarias post tratamiento de ortodoncia son frecuentes y se originan en factores biológicos y mecánicos. La mayor tasa de prevalencia son las reabsorciones radiculares. Es responsabilidad del ortodoncista conocer todos los factores de riesgo con el fin de prevenirlas o detenerlas a tiempo (AU)


Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Middle Aged , Root Resorption/etiology , Orthodontic Appliances, Fixed/adverse effects , Argentina , Chi-Square Distribution , Cross-Sectional Studies , Risk Factors , Dental Pulp Calcification/epidemiology , Age and Sex Distribution
5.
Article in English | LILACS, BBO | ID: biblio-1250441

ABSTRACT

ABSTRACT Objective: To assess the relationship of ɑ and ß angles of maxillary impacted canines with maxillary lateral incisor root resorption. Material and Methods: For this, 40 patients (between 11 and 45 years) with impacted maxillary canines presenting to a private orthodontic clinic were evaluated.20% of the cases were male and 80% were female. The ɑ and ß angles were measured on panoramic radiographs to determine the angulation of impacted canine. CBCT scans had been taken by ProMax 3D CBCT system were used to examine lateral root reorption. The relationship between the size of ɑ and ß angles of impacted maxillary canines and root resorption in the adjacent maxillary lateral incisor was analyzed using SPSS version 22. Results: The mean size of ɑ and ß angles had no significant correlation with the presence/absence, location, or severity of root resorption in the adjacent lateral incisor or the buccolingual position of impacted canine. The ɑ and ß angles in impacted maxillary canines cannot be used to determine the incidence or severity of root resorption in the adjacent lateral incisor. Conclusion: No significant association between ɑ and ß angles and incidence or severity of root resorption in the adjacent lateral incisor was found.


Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Orthodontics, Interceptive , Root Resorption , Tooth, Impacted/diagnosis , Cone-Beam Computed Tomography/instrumentation , Incisor , Tooth, Unerupted , Radiography, Panoramic/instrumentation , Chi-Square Distribution , Cross-Sectional Studies/methods , Data Interpretation, Statistical , Statistics, Nonparametric , Cuspid , Iran
6.
Article in English | LILACS, BBO | ID: biblio-1250442

ABSTRACT

ABSTRACT Objective: To reconnoiter the IL-1A (-889) and IL-1RN (+2018) gene polymorphisms and their association with EARR. Material and Methods: The Science Direct, PubMed and Scopus databases were comprehensively searched by two independent reviewers. In addition, the bibliographies of all relevant publications and textbooks were searched manually. A meta-analysis was performed using data available up to May 9, 2020. Results: A total of 13 and 9 publications were selected for the systematic review and meta-analysis, respectively for both IL-1A and IL-1RN genes. Odds ratio (OR) was used to evaluate the association of the gene polymorphism and the risk of EARR. The risk of EARR was estimated using the overall OR from the published studies. No association was found for IL-1A gene for the risk of EARR. However, the dominant and co-dominant models of IL-1RN gene polymorphism were associated with the risk of EARR. Conclusion: More studies are warranted to determine the relationship between IL-1A and IL-1RN gene polymorphisms and EARR for a clearer understanding of their interactions.


Subject(s)
Orthodontics , Polymorphism, Genetic/immunology , Root Resorption , Genetic Heterogeneity , Interleukin 1 Receptor Antagonist Protein , Odds Ratio , Prospective Studies , Data Interpretation, Statistical , Interleukin-1 , Malaysia
7.
Braz. oral res. (Online) ; 35: e065, 2021. tab, graf
Article in English | LILACS, BBO | ID: biblio-1249364

ABSTRACT

Abstract: Maxillary and mandibular incisors have increased risk for severe orthodontically induced inflammatory root resorption. A patient-related risk factor is aberrant root morphology. This study aimed to assess the frequency of detection of different root morphologies in anterior teeth using dental panoramic tomography (DPT) and long cone periapical radiographs (LCPAs). A retrospective cross-sectional design was used to assess a sample of 50 consecutive pre-treatment radiographic records of patients from a specialist orthodontic practice in Adelaide, Australia. A reference guide was developed that included three previously unreported morphologies: pipette and bent, bent and pointed, bent and blunt. Two trained and calibrated assessors examined each record against the inclusion criteria, then independently assessed each anterior tooth from DPTs and LCPAs to detect the type of root morphology present. Data were analysed using the chi-square statistical test. Radiographic records for 48 patients (48 DPTs and 161 LCPAs) were eligible, with 355 and 426 teeth on DPTs and LCPAs, respectively, included for assessment. Normal root morphology (119 teeth) was commonly observed in DPTs, while bent (154 teeth) was frequently observed using LCPAs. Mandibular incisors often had normal morphology in DPTs but bent in LCPAs. Bent was the most common morphology in maxillary lateral incisors using DPT and LCPAs, although maxillary centrals were mostly normal in DPTs but pointed in LCPAs. Differences using the two image acquisition methods were highly significant (p < 0.01). Aberrant root morphologies are more easily detected in anterior teeth using LCPAs compared to DPTs.


Subject(s)
Humans , Root Resorption/diagnostic imaging , Tooth Root/diagnostic imaging , Radiography, Panoramic , Cross-Sectional Studies , Retrospective Studies , Maxilla
8.
Article in English | WPRIM | ID: wpr-878407

ABSTRACT

OBJECTIVES@#This study aimed to assess the influence of different types of rapid maxillary expansion on root resorption (RR).@*METHODS@#Literature searches were carried out electronically in five English and two Chinese databases. Randomized controlled trials (RCTs), controlled clinical trials (CCTs), cohort studies, and case-control studies were included. The data were extracted by three authors. The risk of bias in the RCTs and nonrandomized studies were assessed in accordance with corresponding scales.@*RESULTS@#Among the 400 articles identified, seven were included for the final analysis. Three studies were graded as high value of evidence, while two and another two studies were graded as moderate value and low value, respectively. According to the available evidence, the tooth-borne maxillary expansion caused more obvious RR of anchorage teeth than the bone-borne one. In addition, the Haas-type palatal acrylic pads could not effectively reduce the degree of RR. The difference in the design of the retainer between the tooth-borne maxillary expansion (the use of a band or wire framework to connect the anchorage tooth) did not cause the difference in the incidence and degree of RR.@*CONCLUSIONS@#Clinical evidence suggested that bone-borne maxillary expansion may decrease the amount of RR, while the amounts of resorption did not significantly differ between Haas and Hyrax and between different retainer types of Hyrax.


Subject(s)
Case-Control Studies , Humans , Maxilla , Palatal Expansion Technique , Palate , Root Resorption , Tooth
9.
Article in English | WPRIM | ID: wpr-888697

ABSTRACT

Nowadays, orthodontic treatment has become increasingly popular. However, the biological mechanisms of orthodontic tooth movement (OTM) have not been fully elucidated. We were aiming to summarize the evidences regarding the mechanisms of OTM. Firstly, we introduced the research models as a basis for further discussion of mechanisms. Secondly, we proposed a new hypothesis regarding the primary roles of periodontal ligament cells (PDLCs) and osteocytes involved in OTM mechanisms and summarized the biomechanical and biological responses of the periodontium in OTM through four steps, basically in OTM temporal sequences, as follows: (1) Extracellular mechanobiology of periodontium: biological, mechanical, and material changes of acellular components in periodontium under orthodontic forces were introduced. (2) Cell strain: the sensing, transduction, and regulation of mechanical stimuli in PDLCs and osteocytes. (3) Cell activation and differentiation: the activation and differentiation mechanisms of osteoblast and osteoclast, the force-induced sterile inflammation, and the communication networks consisting of sensors and effectors. (4) Tissue remodeling: the remodeling of bone and periodontal ligament (PDL) in the compression side and tension side responding to mechanical stimuli and root resorption. Lastly, we talked about the clinical implications of the updated OTM mechanisms, regarding optimal orthodontic force (OOF), acceleration of OTM, and prevention of root resorption.


Subject(s)
Humans , Osteoblasts , Osteoclasts , Periodontal Ligament , Periodontium , Root Resorption , Tooth Movement Techniques
10.
Rev. cient. odontol ; 8(3): e037, sept.-dic. 2020.
Article in English | LILACS | ID: biblio-1253443

ABSTRACT

External root resorption (ERR) is a highly prevalent, multifactorial problem frequently associated with orthodontic treatment. Treatment is complex due to the lack of solid knowledge regarding predisposing factors, systematic management for diagnosis and follow-up protocols or the fundamental theoretical bases of adequate imaging tools for each situation.This review describes the indications of the use of cone beam computed tomography (CBCT) and the factors related to its development and the characteristics of the techniques used in the diagnosis and monitoring of ERR in orthodontics. We compared the advantages and disadvantages of CBCT based on the risk/benefits. Methods: We have reviewed and summarized the information and the risk factors available on ERR in orthodontics and the use of CBCT in the diagnosis and follow-up of ERR with the aim of developing a management protocol. Likewise, CBCT is compared with other imaging techniques frequently used in ERR. The articles reviewed in this study coincide in terms of the advantages of precision of CBCT in the detection and linear and volumetric measurement of ERR associated with orthodontics over two-dimensional techniques. However, CBCT cannot completely replace other imaging techniques since its effectiveness is not significantly greater in cases with moderate ERR compromise. The use of CBCT should be optimized following specific criteria for its application. (AU)


La reabsorción radicular externa (RRE) es un problema frecuentemente asociado con el tratamiento de ortodoncia, de alta prevalencia, multifactorial y de considerable complejidad cuando se carece de conocimiento sólido respecto de los factores predisponentes, el manejo sistemático para el diagnóstico y el protocolo de seguimiento, además de bases teóricas fundamentales en cuanto a herramientas imagenológicas adecuadas para cada situación.El presente estudio tiene como objetivo describir las indicaciones para el uso de la tomografía computarizada de haz cónico (TCHC) para el diagnóstico y el seguimiento de la RRE asociada a ortodoncia, considerando factores informados en la literatura que intervienen en su desarrollo y en las características de las técnicas imagenológicas utilizadas, comparando sus ventajas y desventajas fundamentadas en el valor de riesgo/beneficio. La información descrita sobre RRE asociada a ortodoncia, factores de riesgo y uso de TCHC para el diagnóstico y seguimiento sugerido en la literatura se revisó y resumió para ser orientada hacia un protocolo de manejo. Asimismo, se realizaron comparaciones con otras técnicas imagenológicas frecuentemente utilizadas con el mismo propósito. Los artículos revisados en este estudio concuerdan en cuanto a las ventajas de precisión en la detección y en la medición lineal y volumétrica de la RRE asociada a ortodoncia, respecto de las técnicas bidimensionales; sin embargo, ya que las diferencias en términos de modificación del plan de tratamiento como consecuencia del hallazgo resultan ser poco significativas en situaciones de compromiso moderado. El uso de la TCHC debe optimizarse siguiendo criterios específicos para su aplicación. (AU)


Subject(s)
Humans , Orthodontics , Root Resorption , Root Resorption/diagnostic imaging , Cone-Beam Computed Tomography , Review Literature as Topic
11.
Dental press j. orthod. (Impr.) ; 25(6): 49-58, Nov.-Dec. 2020. tab, graf
Article in English | LILACS, BBO | ID: biblio-1154049

ABSTRACT

ABSTRACT Introduction: Invasive cervical resorption (ICR) is a relatively rare type of ERR (External Root Resorption), in which a localized resorption begins in the cervical area of the tooth, below the epithelial junction and above the ridge crest. Objective: Describe the clinical case of an 11-year-old boy with no dental trauma history, presenting moderate crowding and ectopic eruption of the maxillary right central incisor. He had been undergoing orthodontic treatment elsewhere, and his family was dissatisfied with the results. Description: A new treatment was indicated, which included rapid maxillary expansion followed by extraction of four premolars. During routine panoramic evaluation, a radiolucid image was detected and a periapical radiograph was requested. At this point, an ICR of the maxillary right central incisor was found. The treatment was cautiously finalized and despite the use of light forces, central incisor was severally compromised by ICR and was therefore extracted. Conclusion: This clinical example discusses the importance of routine radiographs for the early diagnoses of ICR.


RESUMO Introdução: A reabsorção cervical invasiva (RCI) é um tipo relativamente raro de reabsorção radicular externa (RRE), no qual uma reabsorção localizada começa na região cervical do dente, abaixo da junção epitelial e acima da crista marginal. Objetivo: Descrever o caso clínico de um menino com 11 anos de idade, sem histórico de trauma dentário, apresentando apinhamento moderado e erupção ectópica do incisivo central superior. Ele realizava tratamento ortodôntico em outro local, mas sua família estava insatisfeita com os resultados. Descrição: Foi iniciado um novo tratamento, que incluiu a expansão rápida da maxila, seguida pela extração de quatro pré-molares. Durante a avaliação de rotina da radiografia panorâmica, uma imagem radiolúcida foi detectada, e uma radiografia periapical da região foi solicitada, sendo encontrada uma RCI no incisivo central superior direito. O tratamento foi finalizado com cautela e, apesar do uso de forças leves, o incisivo central estava seriamente comprometido pela RCI e, portanto, precisou ser extraído. Conclusão: Esse exemplo clínico discute a importância das radiografias de rotina para o diagnóstico precoce da RCI.


Subject(s)
Humans , Male , Child , Root Resorption , Incisor , Root Resorption/etiology , Root Resorption/diagnostic imaging , Bicuspid , Cuspid , Incisor/diagnostic imaging , Maxilla/diagnostic imaging
12.
Int. j. med. surg. sci. (Print) ; 7(4): 1-8, dic. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1151808

ABSTRACT

La reabsorción radicular interna es infrecuente en dentición permanente, la mayoría de los casos se observan en dientes anteriores, su etiología no está del todo clara, es por esto que el tratamiento para este tipo de lesiones es la endodoncia. Se presenta el caso de una paciente sexo femenino, 38 años de edad, sin antecedes médicos relevantes, derivada para evaluación de diente 2.2 con mal pronóstico. El diagnóstico es de absceso apical agudo, pieza con reabsorción interna y lesión apical. Se realiza endodoncia con cementos biocerámicos y aplicación de láser terapéutico de 808 nm de longitud de onda, con parámetros específicos para acelerar la reparación del tejido óseo. La terapia de fotobiomodulación con láser de baja potencia parece ser útil como coadyuvante en el proceso de reparación ósea en piezas con lesión apical y reabsorción interna tratadas endodónticamente.


Internal root resorption is infrequent in permanent dentition, most cases are observed in anterior teeth, its etiology is not entirely clear, which is why the treatment for this type of lesion is endodontics.We present the case of a 38-year-old female patient, without relevant medical history, referred for evaluation of tooth 2.2 with a poor prognosis. Diagnosis Acute apical abscess, tooth with internal resorption and apical lesion. Endodontics are performed with bioceramic cements and the application of a 808 nm wavelength therapeutic laser, with specific parameters to accelerate bone tissue repair.Low-level laser photobiomodulation therapy appears to be useful as an adjunct in the bone repair process in endodontically treated teeth with apical lesion and internal resorption.


Subject(s)
Humans , Female , Adult , Root Resorption/radiotherapy , Low-Level Light Therapy , Endodontics , Radiography, Dental
13.
Rev. cuba. estomatol ; 57(4): e3076, Oct.-Dec. 2020. tab
Article in Portuguese | LILACS, CUMED | ID: biblio-1144450

ABSTRACT

Resumo Introdução: Os pinos de fibra de vidro têm sido amplamente utilizados na reconstrução de elementos com perda excessiva de estrutura dentária. Objetivo: Avaliar a força de adesão de pinos de fibra de vidro após diferentes tratamentos radiculares em diferentes regiões (terço cervical, médio e apical) da dentina radicular. Métodos: Este é um estudo experimental in vitro. Quarenta dentes bovinos foram selecionados, preparados e distribuídos em quatro grupos de acordo com o tratamento de superfície utilizado: adesivo (1), agente quelante (2), ácido poliacrílico (3), não tratado (4). A cimentação dos pinos de fibra de vidro foi realizada com cimento resinosante autocondicionante. Após vinte dias, cada raiz foi cortada em três fatias (um milímetro de espessura) obtidas de três regiões. A resistência de união de cada seção foi determinada usando um teste de resistência da junta de encaixe. Os dados de resistência à flexão (MPa) foram analisados pelos testes ANOVA e Tukey (α = 0,05). Resultados: Na porção cervical, o grupo com tratamento prévio com ácido poliacrílico apresentou menor resistência ao cisalhamento por extrusão (push-out) do que o grupo sem tratamento prévio. O grupo com aplicação do sistema adesivo (28,89 ± 6,64 MPa) e o grupo com tratamento prévio com EDTA (21,58 ± 6,39 MPa) não apresentaram diferenças estatisticamente significantes em relação ao grupo sem tratamento prévio (grupo controle) no terço cervical. Nas porções média e apical, o grupo tratado com adesivo FGM Ambar apresentou maiores valores de ligação em comparação com os outros grupos. Conclusão: A aplicação prévia do adesivo aumentou a resistência de união nos terços médio e apical, em comparação aos outros grupos, podendo ter um efeito benéfico no sucesso clínico do tratamento restaurador(AU)


Resumen Introducción: Los postes de fibra de vidrio se han utilizado ampliamente en la reconstrucción de elementos con pérdida excesiva de estructura dental. Objetivo: Evaluar la fuerza de adhesión de postes de fibra de vidrio después de distintos tratamientos de raíz en diferentes regiones (tercios cervical, medio y apical) de dentina de raíz. Métodos: Estudio experimental in vitro. Se seleccionaron cuarenta dientes bovinos, se prepararon y se distribuyeron en cuatro grupos de acuerdo con el tratamiento de superficie utilizado: (1) adhesivo, (2) agente quelante, (3) ácido poliacrílico, (4) sin tratar. La cementación de los postes de fibra de vidrio se realizó con cemento de resina autograbante. Después de 20 días, cada raíz se seccionó transversalmente en tres rodajas (1 mm de espesor) obtenidas de tres regiones. La resistencia a la unión de cada sección se determinó usando una prueba de resistencia al corte por extrusión (push-out). Los datos de resistencia a la flexión (MPa) se analizaron mediante pruebas ANOVA y Tukey (α = 0,05). Resultados: En la porción cervical, el grupo con tratamiento previo de ácido poliacrílico mostró menor resistencia que el grupo sin tratamiento previo. El grupo con aplicación del sistema adhesivo (28,89 ± 6,64 MPa) y el grupo con tratamiento previo de EDTA (21,58 ± 6,39 MPa) no presentaron diferencias estadísticamente significativas en comparación con el grupo sin tratamiento previo (grupo control) en el tercio cervical. En las porciones media y apical, el grupo tratado con adhesivo Ambar® de FGM Dental Group mostró valores más altos de unión en comparación con los otros grupos. Conclusión: La aplicación previa del adhesivo aumentó la fuerza de unión en los tercios medio y apical, en comparación con los otros grupos, puede tener un efecto beneficioso sobre el éxito clínico del tratamiento restaurador(AU)


ABSTRACT Introduction: Glass fiber posts have been widely used for the reconstruction of elements with excessive dental structure loss. Objective: Evaluate the bond strength of glass fiber posts after various root dentin treatments in different regions (cervical, middle and apical thirds). Methods: An experimental in vitro study was conducted. Forty bovine teeth were selected, prepared and distributed into four groups according to the surface treatment used: (1) adhesive, (2) chelating agent, (3) polyacrylic acid, (4) not treated. The glass fiber posts were cemented with self-etch resin cement. After 20 days, each root was sectioned crosswise into three slices (1 mm in thickness) obtained from three regions. Bond strength was determined in each section with a push-out bond strength test. Flexural strength data (MPa) were analyzed with ANOVA and Tukey's tests. Results: In the cervical portion, the group with previous polyacrylic acid treatment displayed lower push-out strength than the group without previous treatment. The group with application of the adhesive system (28.89 ± 6.64 MPa) and the group with previous EDTA treatment (21.58 ± 6.39 MPa) did not exhibit any statistically significant differences in comparison with the group without previous treatment (control group) in the cervical third. In the middle and apical portions, the group treated with the adhesive Ambar® of FGM Dental Group showed higher bond values in comparison with the other groups. Conclusion: Previous adhesive application increased bond strength in the middle and apical thirds in comparison with the other groups, and may thus have a beneficial effect on the clinical success of the restorative treatment(AU)


Subject(s)
Humans , Root Resorption/therapy , Root Canal Preparation/methods
14.
Rev. Asoc. Odontol. Argent ; 108(3): 104-112, dic. 2020. ilus, tab
Article in Spanish | LILACS | ID: biblio-1147587

ABSTRACT

Objetivo: Evaluar ex vivo, mediante reconstrucción tridimensional con tomografía computarizada de haz cónico, la presencia de vacíos, el volumen y la adaptación de la obturación a las paredes de conductos con reabsorciones dentinarias internas simuladas empleando gutapercha inyectable o cono único de gutapercha más sellador biocerámico. Materiales y métodos: Se utilizaron 10 incisivos centrales superiores humanos extraídos, en cada uno de los cuales se talló una reabsorción artificial para su obturación. La muestra fue sometida, de manera sucesiva, a dos condiciones experimentales diferentes: grupo 1, gutapercha inyectable con sistema EQ-V Master; grupo 2, cono de gutapercha más sellador biocerámico BioRoot RCS. Luego, se realizaron tomografías computarizadas de haz cónico y se hizo el estudio tridimensional. A continuación, se utilizó un programa para identificar los vacíos en la obturación y analizar cuantitativamente el volumen y la superficie cubierta por la obturación en los tercios coronario, medio (ampolla) y apical. Los datos fueron evaluados con la prueba de Wilcoxon (P<0,05). Resultados: El volumen de obturación y la superficie dentinaria en contacto con la obturación fueron similares para las dos técnicas empleadas. Las diferencias entre ambos grupos no fueron estadísticamente significativas (P>0,05). Conclusión: Aunque se observaron vacíos con ambas técnicas (en contacto con la superficie dentinaria cuando se empleó gutapercha inyectable, y en el interior de la obturación cuando se usó cono único de gutapercha más sellador BioRoot RCS), las dos rellenaron adecuadamente las reabsorciones simuladas (AU)


Aim: Ex vivo, tridimensional evaluation with cone beam computed tomography (CBCT), of the presence of voids, the obturation volume and adaption to the root canal walls with simulated internal root resorption, using injected gutta-percha or bioceramic sealer with single gutta-percha cone. Materials and methods: Ten maxillary extracted central human incisors were used and artificial internal root resorption was created in each one. For the root canal obturation, each tooth was subjected to two different experimental conditions successively, conforming two matched groups: Group I: EQ-V Master injected thermo plasticized gutta-percha system. Group II: gutta- percha point plus BioRoot RCS bioceramic sealer. First, the root canals were filled with injected gutta-percha and then, with the bioceramic sealer. Then the teeth were scanned with CBCT and subsequently a digital three-dimensional reconstruction was performed. The presence of voids, obturation volumne and the dentin wall surface covered by the filling material was quantitative analyzed through a software; at the coronal, middle (blister) and apical thirds. The data was analyzed by using Wilcoxon test (P<0.05). Results: The filling material volume and the dentin wall surface covered by it, was similar in both root canal obturation techniques. There was no significant difference between both groups (P>0.05). Conclusion: Although voids were observed in both groups (when the injected thermo plasticized gutta-percha system was used the voids were at the external surface and when BioRoot RCS + gutta-percha cone was used the voids were into the filling material), the obturation of simulated root canal resorption cavities was similar with both obturation techniques (AU)


Subject(s)
Humans , Root Canal Filling Materials , Biocompatible Materials , Organically Modified Ceramics , Gutta-Percha , Root Resorption , Materials Testing , Statistical Analysis , Imaging, Three-Dimensional , Cone-Beam Computed Tomography
15.
Rev. Asoc. Odontol. Argent ; 108(3): 143-152, dic. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1147970

ABSTRACT

Las fuerzas ejercidas durante el tratamiento ortodóncico son consideradas un tipo particular de traumatismo dental. El movimiento ortodóncico de una pieza dentaria puede producir inflamación o necrosis pulpar y reabsorción radicular. Estos efectos colaterales indeseables son difíciles de tratar, especialmente cuando las fuerzas aplicadas son excesivas y no controladas. Diferentes estudios han evaluado el impacto de las fuerzas excesivas durante el movimiento dentario. Sin embargo, los resultados son confusos y contradictorios. La predisposición genética y la variabilidad biológica individual de los pacientes son factores importantes que deben ser tenidos en cuenta. Por eso es necesario contar con una historia clínica completa, utilizar imágenes 3D y realizar diferentes pruebas clínicoradiográficas con el fin de obtener información precisa acerca del diagnóstico, la indicación de tratamiento y el posible pronóstico a distancia. El objetivo de este artículo es realizar una revisión de la patología pulpar y la reabsorción radicular en relación con el tratamiento ortodóncico (AU)


Orthodontic forces are recognised as a particular type of dental trauma. During orthodontic tooth movement, the occurrence of pulp inflammation or necrosis and subsequent root resorption are undesirable side effects that are difficult to treat, especially when uncontrolled excessive forces are applied. Several studies have evaluated the impact of excessive forces during teeth movement. However their results are confused and contradictory. Genetic disposition and individual biological variability are important factors that must be always considered. Therefore, a complete clinical history, the use of 3D images along with different clinical and radiographic diagnostic methods are necessary to provide accurate diagnosis and prognosis of the treatment. The objective of this article is to review the possibility of pulp pathology and root resorption related to orthodontic treatment (AU)


Subject(s)
Root Resorption , Tooth Movement Techniques , Dental Pulp Diseases , Prognosis , Tooth Injuries , Dental Pulp Necrosis
16.
Dental press j. orthod. (Impr.) ; 25(5): 24-29, Sept.-Oct. 2020. tab, graf
Article in English | LILACS, BBO | ID: biblio-1133693

ABSTRACT

ABSTRACT Objective: The present study aimed at comparing the external lateral root resorption (ELRR) and external apical root resorption (EARR) between teeth moved through the atrophic edentulous ridge and those undergoing the usual orthodontic movement. Methods: Fifty-four premolars were evaluated, where 27 of them had been moved toward the edentulous ridge (Group 1) and 27 from the same patient, had not been translated, which comprised the control group (Group 2). ELRR was evaluated by 0-3 scores and EARR was evaluated by 0-4 scores, before and after movement. Measurements were compared by Kruskal-Wallis and Student-Newman-Keuls tests. Results: ELRR increased statistically only in the Group 1 (p< 0.05). After orthodontic treatment, it was observed that almost 56% (n = 15) of teeth in Group 1 presented scores 2 and 3, while Group 2 presented scores 2 and 3 in about 11% (n= 3) of the teeth. EARR increased in both groups after orthodontic movement, however, statistically analyses showed no significant differences between groups (p> 0.05). Conclusions: Orthodontic movement into the atrophic edentulous ridge is subject to a greater lateral external root resorption.


RESUMO Objetivo: O presente estudo teve como objetivo comparar a reabsorção radicular lateral externa (RRLE) e a reabsorção radicular apical externa (RRAE) em dentes movimentados sobre o rebordo edêntulo atrófico e naqueles submetidos à movimentação ortodôntica usual. Métodos: Foram avaliados 54 pré-molares, sendo 27 deles movimentados em direção ao rebordo edêntulo (Grupo 1) e 27 (dos mesmos pacientes) não transladados, que compuseram o grupo controle (Grupo 2). A RRLE foi avaliada por meio de escores de 0 a 3, e a RRAE foi avaliada por meio de escores de 0 a 4, antes e depois do tratamento. As medidas foram comparadas por meio dos testes de Kruskal-Wallis e de Student-Newman-Keuls. Resultados: O escore da RRLE aumentou estatisticamente apenas no Grupo 1 (p< 0,05). Após o tratamento ortodôntico, observou-se que quase 56% (n = 15) dos dentes do Grupo 1 apresentaram escores 2 e 3, enquanto o Grupo 2 apresentou escores 2 e 3 em cerca de 11% (n = 3) dos dentes. O escore da RRAE aumentou em ambos os grupos após a movimentação ortodôntica; entretanto, as análises estatísticas não mostraram diferenças significativas entre os grupos (p> 0,05). Conclusões: Dentes submetidos à movimentação ortodôntica sobre rebordo edêntulo atrófico estão sujeitos a uma maior reabsorção radicular externa lateral.


Subject(s)
Humans , Root Resorption , Bicuspid , Root Resorption/etiology , Root Resorption/diagnostic imaging , Tooth Movement Techniques
17.
Dent. press endod ; 10(2): 73-78, maio-ago.2020. Ilus
Article in English | LILACS | ID: biblio-1344662

ABSTRACT

Introdução: Reabsorção radicular interna é a perda progressiva de dentina intrarradicular como resultado de atividades clásticas. Geralmente, mantém-se assintomática e é diagnosticada durante o exame radiográfico de rotina. O correto diagnóstico é de extrema importância para evitar a terapêutica inadequada, já que, em alguns casos, sua progressão pode resultar na perda do elemento dentário. Objetivo: O objetivo do presente trabalho é relatar um caso clínico de perfuração radicular causada por uma reabsorção interna inflamatória em incisivo central superior, em terço médio da raiz, com integridade do terço apical. Métodos: O tratamento foi realizado usando técnica de obturação com cones de guta-percha e cimento endodôntico à base de resina epóxi no terço apical e agregado trióxido mineral na área da reabsorção, com auxílio do microscópio operatório. Resultado: Após um período de três anos de acompanhamento clínico e radiográfico, pode-se confirmar o processo de reparo, demonstrando que é possível obter sucesso em casos de reabsorção perfurante. Conclusão: Mesmo em casos em que há comunicação da polpa dentária com tecidos periodontais, é possível salvar o elemento dentário com o diagnóstico preciso e tratamento correto.


Introduction: Internal root resorption is the progressive destruction of intraradicular dentin as a result of clastic activities. It is usually asymptomatic and discovered by chance on routine radiographic examinations. Is of vital importance to make a correct diagnosis so that the appropriate treatment can be provided because in some cases can result in destruction of the dental element. Objective: The aim of this study is to report a case of successful non-surgical management of perforating internal resorption in an maxillary central incisor, in the middle third of the root. Materials and Methods: The treatment was successfully performed with the aid of an operative microscope. The apical third was filled with guttapercha and epoxy-resin-based sealer and the perforation site it was repaired with mineral trioxide aggregate. Conclusion: Clinical findings and periapical radiographs show that the symptoms and signs ceased, and the results were satisfactory at 3-years follow-up with radiographic examination (AU).


Subject(s)
Root Canal Filling Materials , Root Resorption , Radiography, Dental , Dental Pulp , Root Canal Obturation , Therapeutics , Perforant Pathway
18.
Dental press j. orthod. (Impr.) ; 25(4): 16-22, July-Aug. 2020. graf
Article in English | LILACS, BBO | ID: biblio-1133678

ABSTRACT

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.


Subject(s)
Humans , Root Resorption/etiology , Root Resorption/diagnostic imaging , Tooth Resorption , Open Bite/therapy , Open Bite/diagnostic imaging , Orthodontic Anchorage Procedures , Tooth Movement Techniques/adverse effects
19.
Rev. cient. odontol ; 8(2): e021, mayo-ago. 2020. ilus
Article in Spanish | LIPECS, LILACS, LIPECS | ID: biblio-1119299

ABSTRACT

La reabsorción cervical externa es un proceso patológico con una etiología no comprendida en su totalidad. Los posibles factores predisponentes son el tratamiento de ortodoncia, los traumatismos, el blanqueamiento interno, el bruxismo, entre otros. El blanqueamiento interno es una forma efectiva y mínimamente invasiva de blanquear dientes no vitales, con un riesgo asociado con reabsorción, que al no ser tratado podría provocar incluso la pérdida dentaria. Este reporte de caso describe el manejo de dos incisivos superiores con reabsorciones cervicales externas, que tienen como antecedente tratamiento de conducto y blanqueamiento interno. (AU)


External cervical resorption is a pathological process, with an etiology that is not completely understood. Possible predisposing factors are orthodontic treatment, trauma, internal whitening, bruxism, etc. Internal whitening is an effective and minimally invasive method for the whitening non-vital teeth. This method is associated with a risk of resorption, which if not treated, can lead to tooth loss. This case report describes the management of two upper incisors with external cervical resorption, with a previous history of root canal treatment and internal whitening. (AU)


Subject(s)
Humans , Female , Adult , Root Resorption , Tooth Resorption , Tooth Bleaching Agents
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