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1.
Rev. Asoc. Odontol. Argent ; 110(3): 1101233, sept.-dic. 2022. ilus
Article in Spanish | LILACS | ID: biblio-1425918

ABSTRACT

Objetivo: La reabsorción dentinaria interna es un pro- ceso causado por la actividad odontoclástica asociada princi- palmente a la inflamación pulpar crónica y/o traumatismos, y se caracteriza por la pérdida progresiva de tejido dentinario y la posible invasión al cemento. El presente informe describe el diagnóstico y tratamiento de un molar inferior que presentó un cuadro sintomático de reabsorción dentinaria interna. Caso clínico: Un paciente de 38 años fue derivado a la consulta por presentar una zona de reabsorción interna en un segundo molar inferior. Durante el examen clínico y ra- diográfico se tomó una radiografía preoperatoria periapical con radiovisiógrafo en la que se observó la presencia de un área compatible con el diagnóstico de reabsorción dentinaria interna, el que fue posteriormente confirmado por medio de una tomografía computada de haz cónico. La imagen de la lesión se presentó como una zona radiolúcida deformante de bordes nítidos, localizada a nivel de la cámara pulpar. El tra- tamiento consistió en la extirpación de la pulpa coronaria y de la instrumentación, desinfección y obturación de los conduc- tos radiculares y la cavidad de acceso. En el control clínico y radiográfico realizado luego de 3 años se observó que el paciente estaba asintomático y las estructuras perirradiculares se encontraban dentro de los límites normales. La observación histológica del material removido de la cámara pulpar reveló la presencia de un tejido granulomatoso con numerosos vasos sanguíneos y escasos focos micro hemorrágicos. Hasta el momento, el tratamiento endodóntico es el pro- cedimiento indicado para el tratamiento de la reabsorción dentinaria interna. Se destaca la importancia de la tomografía computada de haz cónico para el diagnóstico y tratamiento temprano de las reabsorciones dentinarias internas a efectos de contar con un pronóstico favorable (AU)


Aim: Internal dentine resorption is aprocess caused by odontoclastic activity, mainly associated with chronic pulpal inflammation and/or trauma, and it'scharacterized by a pro- gressive loss of dentine tissue and the possible invasion of the cementum. This report describes the diagnosis and treatment of a lower molar that presented a symptomatic case of inter- nal dentine resorption. Clinical case: A 38-years old patient was referred to the office because of presenting an area of internal resorption in a lower second molar. During clinical and radiographic exam- ination, a periapical preoperative radiograph with radiovisio- graph was taken, in which the presence of an area compatible with the diagnosis of internal dentine resorption was observed, which was later confirmed by a cone-beam computed tomog- raphy.The image of the lesion was presented as a deforming radiolucent area with sharp edges, located at pulp chamber level. Treatment consisted of the removal of the coronary pulp and the instrumentation, disinfection and filling of the root ca- nals and the access cavity. In the clinical and radiographic control carried out 3 years after procedure, it was observed that the patient was asymptomatic and the periradicular struc- tures were within normal limits. The histological observation of the removed material from the pulp chamber revealed the presence of a granulomatous tissue with numerous blood ves- sels and scarce micro hemorrhagic focus. Until now, the endodontic treatment is the indicated pro- cedure to treat internal dentine resorption. It is necessary to highlight the importance of the cone-beam computerized to- mography for the early diagnosis and treatment of internal dentine resorptions in order to have a favorable outlook (AU)


Subject(s)
Humans , Male , Adult , Root Resorption/therapy , Root Resorption/diagnostic imaging , Tooth Crown/physiopathology , Root Canal Therapy/methods , Follow-Up Studies , Dental Pulp Diseases/complications , Cone-Beam Computed Tomography/methods , Molar/physiopathology
2.
Int. j. morphol ; 40(5): 1321-1327, 2022. ilus, tab
Article in English | LILACS | ID: biblio-1405275

ABSTRACT

SUMMARY: temporary mandibular molars in panoramic radiographs of pediatric patients with unilateral posterior crossbite (UPCB). This cross-sectional and retrospective study analyzed 114 orthopantomograms of patients between 6 - 9 years of age with unilateral posterior crossbite diagnosis. The first and second mandibular molars were analyzed. Their root resorption stage was typified, and the root lengths were measured; to later compare the data obtained depending on the malocclusion side. 86.4 % of molars showed a linear resorption pattern, and atypical resorption prevalence in patients with UPCB was 13.5 %. The total length average of the first molars on the side of the malocclusion was 8.20 mm, while the contralateral exhibited a mean of 9.29 mm. Lastly, the second molars had a mean length of 11.12 mm in crossbite side and 12.30 mm in the normal occlusion side. UPCB could affect physiological resorption by observing a resorption alteration in those mandibular molars located on the malocclusion side.


RESUMEN: El trabajo de este estudio se realizó en molares mandibulares temporales en radiografías panorámicas de pacientes pediátricos con mordida cruzada posterior unilateral (MCPU). Este estudio transversal y retrospectivo analizó 114 ortopantomografías de pacientes entre 6 - 9 años de edad con diagnóstico de mordida cruzada posterior unilateral. Se analizaron los primeros y segundos molares mandibulares. Se tipificó su estado de reabsorción radicular y se midió la longitud de las raíces; para luego comparar los datos obtenidos según el lado de la maloclusión. El 86,4 % de los molares mostró un patrón de reabsorción lineal y la prevalencia de reabsorción atípica en pacientes con MCPU fue del 13,5 %. El promedio de longitud total de los primeros molares del lado de la maloclusión fue de 8,20 mm, mientras que el contralateral exhibió una media de 9,29 mm. Por último, los segundos molares tenían una longitud media de 11,12 mm en el lado de mordida cruzada y de 12,30 mm en el lado de oclusión normal. La MCPU podría afectar la reabsorción fisiológica al observar una alteración de la reabsorción en aquellos molares mandibulares ubicados en el lado de la maloclusión.


Subject(s)
Humans , Male , Female , Child , Root Resorption/diagnostic imaging , Tooth, Deciduous/diagnostic imaging , Malocclusion/diagnostic imaging , Radiography, Panoramic , Cross-Sectional Studies , Retrospective Studies , Age and Sex Distribution , Molar/anatomy & histology , Molar/diagnostic imaging
3.
Pesqui. bras. odontopediatria clín. integr ; 22: e210163, 2022. tab, graf
Article in English | LILACS, BBO | ID: biblio-1386815

ABSTRACT

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.


Subject(s)
Animals , Dogs , Periapical Periodontitis/diagnostic imaging , Root Resorption/diagnostic imaging , Radiography, Dental/instrumentation , Cone-Beam Computed Tomography/instrumentation , Dimensional Measurement Accuracy , Chi-Square Distribution , Dental Pulp Cavity
4.
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
5.
Dental press j. orthod. (Impr.) ; 26(3): e2119389, 2021. tab, graf
Article in English | LILACS, BBO | ID: biblio-1286216

ABSTRACT

ABSTRACT Objective: The current study investigated the correlation between pulpal sensitivity to the electric pulp tester (EPT) and external apical root resorption (EARR) in four types of maxillary anterior teeth of fixed orthodontic treatment patients. Methods: In this prospective cohort study, 232 anterior teeth of 58 patients (mean age 18.96 ± 6.13 years) treated with fixed orthodontic treatment were examined. The EPT readings were recorded at twelve time points immediately before archwire insertion. Root resorption of four maxillary incisors were measured by means of parallel periapical radiographs at three time intervals (six months interval from the start) through design-to-purpose software to optimize data collection. A multiple linear regression model and Pearson correlation coefficient were used to assess the association of EPT values and observed EARR (p< 0.05). Results: The highest level of EPT measurement was recorded at initial visit, and then there was a decreasing trend in EPT level during treatment for the next six and twelve months. There was another increasing trend after six months till the finishing time of the treatment. There was a significant correlation between changes in root length and time of recording the root length (p< 0.001). There was significant positive correlation between changes in EPT level and amount of observed root resorption (p< 0.001). Conclusion: The relative decrease in electric pulp test level could be a diagnostic sign of root resorption during orthodontic treatment. Further studies with longer follow up are needed to confirm the current results.


RESUMO Objetivo: O presente estudo investigou a correlação entre a sensibilidade pulpar ao teste pulpar elétrico (TPE) e a reabsorção radicular apical externa (RRAE) nos quatro dentes anteriores superiores de pacientes em tratamento ortodôntico com aparelho fixo. Métodos: Nesse estudo de coorte prospectivo, foram avaliados 232 dentes anteriores de 58 pacientes (idade média 18,96 ± 6,13 anos) tratados com aparelho ortodôntico fixo. As leituras do TPE foram registradas em doze tempos de avaliação, imediatamente antes da inserção dos arcos. As reabsorções radiculares dos quatro incisivos superiores foram aferidas por meio da média das radiografias periapicais, em três intervalos de tempo (em intervalos de seis meses desde o início) por um software desenvolvido para essa finalidade, com o intuito de otimizar a coleta de dados. Para aferir a associação entre os valores de TPE e as RRAE observadas (p< 0,05), foram utilizados o modelo de regressão linear múltiplo e o coeficiente de correlação de Pearson. Resultados: O nível mais alto das medidas do TPE foi registrado na primeira visita e, daí em diante, houve uma tendência de diminuição no nível do TPE durante o tratamento, nos seis a doze meses seguintes. Houve, também, outra tendência de aumento após os seis meses até o término do tratamento, além de uma correlação significativa entre as mudanças no comprimento radicular e o tempo de registro do comprimento radicular (p< 0,001), bem como uma correlação positiva significativa entre as mudanças no nível do TPE e a quantidade de reabsorção radicular observada (p< 0,001). Conclusão: Uma diminuição relativa no nível de sensibilidade ao teste pulpar elétrico pode ser um sinal diagnóstico de reabsorção radicular durante o tratamento ortodôntico. Estudos futuros com acompanhamentos mais longos são necessários para confirmar os presentes resultados.


Subject(s)
Humans , Adolescent , Adult , Young Adult , Root Resorption/etiology , Root Resorption/diagnostic imaging , Prospective Studies , Dental Pulp/diagnostic imaging , Incisor/diagnostic imaging , Maxilla/diagnostic imaging
6.
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
7.
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
8.
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
9.
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
10.
Acta odontol. latinoam ; 33(1): 14-21, June 2020. graf
Article in English | LILACS | ID: biblio-1130727

ABSTRACT

ABSTRACT The aim of this study was to evaluate the influence of spatial resolution (line pairs per millimetre - lp/mm) on the diagnosis of simulated external root resorption (ERR) in multirooted teeth by using digital periapical radiography. Forty human mandibular molars (80 roots) were used. The roots were divided into the following groups (n = 10): control without root filling (WORF), control with root filling (WRF), small ERRWORF, small ERRWRF, moderate ERRWORF, moderate ERRWRF, extensive ERRWORF and extensive ERRWRF. Four digital radiographs (phosphor storage plates - PSP system) were taken of each tooth in three angulations. The PSPs were scanned with 10, 20, 25 and 40 lp/mm. All images were assessed by three endodontists who used a fivepoint scale for presence and absence of ERR and classified its location (cervical, middle or apical third). ROC curves and oneway ANOVA were performed (p < 0.01). Diagnosis of ERR in nonrootfilled teeth showed higher values of sensitivity for 20 lp/mm and higher values of both specificity and accuracy for 40 lp/mm. In rootfilled teeth, sensitivity and accuracy were higher for 25 lp/mm and spatial resolution had no influence on specificity. The best resolution for diagnosis of small and extensive ERR was 25 lp/mm, whereas for moderate ERR, it was 40 lp/mm. Cervical ERR was the most difficult to diagnose, regardless of the spatial resolution. Higher spatial resolutions have improved the radiographic diagnosis of simulated ERR in multirooted teeth and this should be considered when performing digital radiographs.


RESUMO O objetivo deste estudo foi avaliar a influência do número de pares de linhas em radiografia intraoral digital, na precisão da detecção de reabsorção radicular externa. Quarenta molares inferiores (n=80 raízes) foram submetidos ao preparo químico mecânico e em então, metade da amostra foi obturada. Em seguida, as raízes dos dentes foram aleatoriamente divididas de acordo com o tamanho da reabsorção radicular a ser simulada e com a presença e ausência de tratamento endodôntico. As RRE foram realizadas com brocas esféricas diamantadas de tamanhos 1/2, 1, 2. Executouse radiografias digitais por meio do sistema de aquisição semidireto com a utilização de placas de fósforo fotoestimuladas (PSP). Em cada dente, incidências orto, mésio e distorradial foram repetidas quatro vezes, para que pudessem ser digitalizadas com resoluções de 10, 20, 25, 40 pl/mm. Após análise, verificouse que dentes obturados apresentaram menores valores de sensibilidade com 10, 20 e 25 pl/mm e maiores valores de especificidade e acurácia para as mesmas resoluções. Dentes sem obturação registraram maiores valores de sensibilidade para resolução 20 e menor para 40; no entanto, a especificidade e a acurácia, foram maiores com 40 e menores em 10. Em RRE pequena, as resoluções 10 e 25 pl/mm foram respecti vamente menos e mais acuradas; RRE média, foi maior com 40 pl/mm e RRE grandes foram melhores identificadas com 25. Correlacionando acertos no diagnóstico com localização das RRE, verificouse que o terço cervical apresentouse menos detectável. Concluiuse que resolução espacial influenciou a detecção de RRE simuladas em radiografias periapicais digitais.


Subject(s)
Humans , Root Resorption/diagnostic imaging , Radiography, Dental, Digital/methods , Molar/diagnostic imaging , Root Canal Obturation , Cone-Beam Computed Tomography
11.
Dental press j. orthod. (Impr.) ; 24(1): 27-33, Jan.-Feb. 2019. graf
Article in English | LILACS | ID: biblio-989691

ABSTRACT

ABSTRACT Despite the explanations about the mechanisms and reasons why dental follicles of unerupted maxillary canines do not cause root resorption in neighboring teeth, questions remain about the time expected for this event and the lack of protocols for preventive clinical management, which may serve as insights for further studies. Here, these mechanisms are correlated with imaging findings of CT scans and 3D reconstructions of a typical clinical case.


RESUMO Apesar das explicações dos mecanismos e dos porquês os folículos pericoronários dos caninos superiores não irrompidos podem reabsorver as raízes dos dentes vizinhos, questiona-se a inexistência de previsibilidade do tempo em que isso ocorre e a ausência de protocolos de condutas clínicas preventivas, como insights para novas pesquisas. Correlaciona-se, também, esses mecanismos com os aspectos imaginológicos de cortes tomográficos e reconstruções 3D de um caso clínico característico.


Subject(s)
Humans , Root Resorption/diagnostic imaging , Tooth Eruption, Ectopic , Tomography, X-Ray Computed , Dental Sac
12.
Dental press j. orthod. (Impr.) ; 23(6): 56-63, Nov.-Dec. 2018. tab, graf
Article in English | LILACS | ID: biblio-975032

ABSTRACT

ABSTRACT Objective: The objective of this study was to assess the external apical root resorption (EARR) of the maxillary posterior teeth after intrusion with miniscrews. Methods: Fifteen patients (13 females and 2 males) with age ranging from 14.5 to 22 years (mean 18.1 ±2.03 years) were selected to participate in this study. All patients presented with anterior open bite of 3 mm or more. An intrusion force of 300 g was applied on each side to intrude the maxillary posterior teeth. Cone beam computed tomography (CBCT) scans were taken pretreatment and post-intrusion and were analyzed to evaluate the EARR. Results: The maxillary posterior teeth were intruded in average 2.79 ± 0.46 mm (p< 0.001) in 5.1 ± 1.3 months, and all examined roots showed statistically significant EARR (p< 0.05) with an average of 0.55 mm, except the distobuccal root of the left first permanent molars and both the palatal and buccal roots of left first premolars, which showed no statistically significant changes. Conclusions: The evaluated teeth presented statistically significant EARR, but clinically, due to the small magnitude, it was not considered significant. Moreover, the CBCT provided a good visualization of all roots in all three planes, and it was effective in detecting minimal degrees of EARR.


RESUMO Objetivo: o objetivo desse estudo foi verificar a existência de reabsorção radicular apical externa (RRAE) em dentes posterossuperiores após intrusão ancorada em mini-implantes. Métodos: quinze pacientes (13 mulheres e 2 homens) com a idade variando entre 14,5 e 22 anos (média de 18,1 ± 2,03 anos) foram selecionados para participar desse estudo. Todos os pacientes possuíam mordida aberta anterior de 3mm ou mais. Uma força de 300 gramas foi aplicada em cada lado para intruir os dentes posterossuperiores. Tomografias computadorizadas de feixe cônico (TCFC), adquiridas antes do tratamento e após a intrusão, foram comparadas para se avaliar a RRAE. Resultados: os dentes posterossuperiores foram intruídos em média 2,70 ± 0,46 mm (p< 0,001) em 5,1 ± 1,3 meses, e todas as raízes examinadas mostraram RRAE estatisticamente significativa (p< 0,05), com média de 0,55 mm, exceto pela raiz distovestibular dos primeiros molares permanentes esquerdos, e pelas raízes palatina e vestibular dos primeiros pré-molares esquerdos, que não apresentaram mudanças estatisticamente significativas. Conclusões: os dentes avaliados apresentaram RRAE estatisticamente significativa, a qual, porém, não foi considerada clinicamente significativa, devido à sua reduzida magnitude. Além disso, a TCFC possibilitou uma boa visualização de todas as raízes nos três planos espaciais, e foi eficaz para detecção de níveis mínimos de RRAE.


Subject(s)
Humans , Male , Female , Adolescent , Adult , Young Adult , Root Resorption/diagnostic imaging , Bone Screws/adverse effects , Imaging, Three-Dimensional/methods , Open Bite/therapy , Maxilla/pathology , Maxilla/diagnostic imaging , Root Resorption/pathology , Tooth Movement Techniques/adverse effects , Tooth Movement Techniques/instrumentation , Tooth Movement Techniques/methods , Tooth Resorption/pathology , Tooth Resorption/diagnostic imaging , Tooth Root/pathology , Tooth Root/diagnostic imaging , Bicuspid , Open Bite/diagnostic imaging , Dental Stress Analysis , Orthodontic Anchorage Procedures/adverse effects , Orthodontic Anchorage Procedures/instrumentation , Orthodontic Anchorage Procedures/methods , Cone-Beam Computed Tomography/methods , Molar/physiopathology
13.
Dental press j. orthod. (Impr.) ; 23(1): 24-36, Jan.-Feb. 2018. graf
Article in English | LILACS | ID: biblio-891125

ABSTRACT

ABSTRACT Dental arches areas with teeth presenting dentoalveolar ankylosis and replacement root resorption can be considered as presenting normal bone, in full physiological remodeling process; and osseointegrated implants can be successfully placed. Bone remodeling will promote osseointegration, regardless of presenting ankylosis and/or replacement root resorption. After 1 to 10 years, all dental tissues will have been replaced by bone. The site, angulation and ideal positioning in the space to place the implant should be dictated exclusively by the clinical convenience, associated with previous planning. One of the advantages of decoronation followed by dental implants placement in ankylosed teeth with replacement resorption is the maintenance of bone volume in the region, both vertical and horizontal. If possible, the buccal part of the root, even if thin, should be preserved in the preparation of the cavity for the implant, as this will maintain gingival tissues looking fully normal for long periods. In the selection of cases for decoronation, the absence of microbial contamination in the region - represented by chronic periapical lesions, presence of fistula, old unconsolidated root fractures and active advanced periodontal disease - is important. Such situations are contraindications to decoronation. However, the occurrence of dentoalveolar ankylosis and replacement resorption without contamination should neither change the planning for implant installation, nor the criteria for choosing the type and brand of dental implant to be used. Failure to decoronate and use dental implants has never been reported.


RESUMO Áreas dos maxilares com dentes em anquilose alveolodentária e reabsorção dentária por substituição podem ser consideradas como portadoras de osso normal, em pleno processo fisiológico contínuo de remodelação; e os implantes osseointegráveis podem ser aplicados com sucesso. A remodelação óssea promoverá sua osseointegração, independentemente de haver raízes em anquilose e/ou em reabsorção por substituição. Após 1 a 10 anos, todos os tecidos dentários terão sido substituídos por osso. O local, a angulação e o posicionamento ideal no espaço para se colocar o implante devem ser ditados pela conveniência clínica associada, exclusivamente, ao planejamento prévio. Uma das vantagens da decoronação com colocação imediata de implantes em dentes anquilosados e com reabsorção por substituição é a manutenção do volume ósseo na região, tanto vertical quanto horizontalmente. Se possível, deve-se preservar, na preparação da cavidade para o implante, a parte vestibular da raiz, mesmo que fina; isso deixará os tecidos gengivais com aspecto de plena normalidade por longos períodos. O importante na seleção de casos para a decoronação é a ausência de contaminação microbiana na região, representada por lesões periapicais crônicas, presença de fístula, fraturas radiculares antigas não consolidadas e doença periodontal avançada ativa. Essas situações são contraindicações para a decoronação. A ocorrência de anquilose alveolodentária e reabsorção por substituição sem contaminação não deve mudar o planejamento para instalação de implantes, nem mesmo os critérios de escolha do tipo e marca de implante dentário a ser utilizado. Nunca foi relatado fracasso na decoronação e uso de implantes dentários.


Subject(s)
Humans , Adolescent , Adult , Root Resorption/physiopathology , Osseointegration/physiology , Tooth Ankylosis/surgery , Dental Implantation, Endosseous , Root Resorption/diagnostic imaging , Radiography , Alveolar Bone Loss/etiology , Alveolar Bone Loss/physiopathology , Tooth Ankylosis/complications
14.
Odontoestomatol ; 19(29): 76-84, junio 2017.
Article in English, Spanish | LILACS | ID: biblio-848434

ABSTRACT

Antecedentes: Los estudios epidemiológicos clínicos no permiten saber la situación de la patología pulpar y periapical de origen endodóntico, información que puede ser obtenida con el análisis de radiografías panorámicas, para la prevención y la orientación en los servicios de salud oral. Objetivo: Determinar la frecuencia y las características de los hallazgos endodónticos en radiografías panorámicas digitales. Métodos: Se analizaron 1.500 panorámicas digitales, de pacientes mayores de 18 años, de las que se registraron el número de dientes en boca, número de dientes con tratamiento endodóntico y su estado, zona radiolúcida periapical, fractura, reabsorción, instrumentos fracturados, perforaciones, pulpolitos e hipercementosis. Resultados: 48 % de las radiografías presentaban por lo menos un hallazgo endodóntico. 39,5 % correspondían a tratamientos endodónticos, en un total de 1.594 dientes, de las cuales 52,7 % se encontraban subobturados, 44,9 % en buen estado y 2,5 % sobreobturados. El 69 % de los dientes obturados se encontraban en el maxilar superior. 275 (18,3 %) de las radiografías presentaron zona radiolúcida periapical. En el 4,4 % de las radiografías se encontró algún diente con reabsorción. Para ninguno de los hallazgos se encontraron diferencias entre hombres y mujeres. El tratamiento endodóntico y la presencia de zona radiolúcida periapical aumentan significativamente con la edad. Conclusión: la patología pulpar y del periápice tienen una alta prevalencia en la población estudiada y requieren mejores mecanismos para su prevención, siendo la incorrecta obturación de los conductos, una variable a tener en cuenta para evitar las lesiones apicales y mejorar el pronóstico del diente


Background: Clinical epidemiological studies do not allow us to know the status of pulp and periapical disease of endodontic origin, information that can be obtained analyzing panoramic radiographs, so as to provide prevention and counseling services in oral health. Objective: To determine the frequency and characteristics of endodontic findings in digital panoramic radiographs. Methods: We analyzed 1,500 digital panoramic radiographs of patients over 18. The following information was recorded: number of teeth in the mouth, number of teeth with endodontic treatment and condition, periapical radiolucent area, fracture, resorption, broken instruments, perforations, pulp stones and hypercementosis. Results: 48% of the radiographs showed at least one endodontic finding. 39.5% were endodontic treatments in a total of 1,594 teeth, of which 52.7% were underfilled, 44.9% were in good condition and 2.5% were overfilled. 69% of the filled teeth were in the upper jaw. 275 (18.3%) radiographs presented a periapical radiolucent area. 4.4% of the radiographs showed at least one tooth with resorption. No differences between men and women were detected for any of the findings. Endodontic treatment and the presence of a periapical radiolucent area increase significantly with age. Conclusion: Pulp and periapical disease has a high prevalence in the population studied and requires better prevention mechanisms. Inadequate filling of the canals is a variable to consider to avoid apical lesions, and to improve the prognosis of the tooth


Subject(s)
Root Canal Therapy/statistics & numerical data , Root Resorption/diagnostic imaging , Radiography, Panoramic
15.
Braz. dent. j ; 27(4): 476-480, July-Aug. 2016. graf
Article in English | LILACS | ID: lil-794622

ABSTRACT

Abstract This case report aimed to highlight the usefulness of cone beam computed tomography (CBCT) and its post-processing tools for the diagnosis, follow-up and treatment planning of invasive cervical resorption (ICR). A 16-year-old female patient was referred for periapical radiographic examination, which revealed an irregular but well demarcated radiolucency in the mandibular right central incisor. In addition, CBCT scanning was performed to distinguish between ICR and internal root resorption. After the diagnosis of ICR, the patient was advised to return shortly but did so only six years later. At that time, another CBCT scan was performed and CBCT registration and subtraction were done to document lesion progress. These imaging tools were able to show lesion progress and extent clearly and were fundamental for differential diagnosis and treatment decision.


Resumo Com este relato de caso clínico objetiva-se enfatizar a contribuição das ferramentas de pós-processamento aplicadas às imagens de tomografia computadorizada de feixe cônico (TCFC) no diagnóstico, acompanhamento e decisão do tratamento de reabsorção cervical invasiva (ICR). Paciente do sexo feminino, com 16 anos de idade foi encaminhada para realização de radiografia periapical e foi observada radiolucência irregular, na raiz do incisivo central inferior direito. A TCFC foi realizada no intuito de se obter diagnóstico diferencial entre ICR e reabsorção radicular interna. Após o diagnóstico de ICR, o paciente foi orientado a retornar em breve, mas o fez somente seis anos mais tarde. Fez-se assim outra tomografia e registro e subtração foram realizados para documentar a progressão da lesão. Essas ferramentas foram capazes de revelar claramente o progresso da lesão, sua real extensão e foram fundamentais para o diagnóstico diferencial e decisão de tratamento.


Subject(s)
Humans , Female , Adolescent , Cone-Beam Computed Tomography/methods , Root Resorption/pathology , Root Resorption/diagnostic imaging , Tooth Cervix/pathology
16.
Article in Portuguese | LILACS | ID: biblio-964470

ABSTRACT

A reabsorção radicular apical externa é uma patologia frequentemente encontrada em dentes permanentes. Realizouse uma revisão de literatura sobre esta patologia, do período de 1988 a 2012, no Portal CAPES, verificando métodos diagnósticos e fatores etiológicos relacionados à mesma. Concluiu-se que: o método radiográfico mais efetivo para detecção de reabsorções radiculares apicais externas são as tomografias computadorizadas por feixes cônicos, embora as mais indicadas sejam as periapicais, especialmente as digitais; os fatores genéticos demonstraram associação com o grau de reabsorção, enquanto o gênero e a idade não; deve-se observar os fatores etiológicos da reabsorção para determinar um adequado tratamento; todos os tratamentos ortodônticos levam à reabsorção radicular apical externa, que cessam com o término da mecanoterapia, o formato radicular e a presença de reabsorções prévias em exames radiográficos estão associados a um maior grau de reabsorção e devem ser observadas através de exames radiográficos.


External apical root resorption is a common pathology found in permanent teeth. This article presents a literature review from 1988 to 2012, searched in Portal CAPES, about the diagnostic methods and etiologic factors related with this pathology. The following conclusions were: the cone beam computed tomography is the most effective method to detect external apical root resorptions, although periapical radiographs are more indicated, of preference digital; genetic factors showed association with the degree of the resorption, while age and gender do not; etiologic factors should be observed to determine an adequate treatment; all orthodontic treatment lead to external apical root resorption, which stops with the end of the mechanotherapy, radicular form and the presence of previous resorptions in radiographies have an association with a higher degree of resorption and should be observed using radiographic exams.


Subject(s)
Humans , Root Resorption/diagnostic imaging , Tooth Resorption/diagnostic imaging , Radiography, Dental, Digital/instrumentation , Cone-Beam Computed Tomography/instrumentation
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