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1.
Prim Dent J ; 10(1): 20-27, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33722131

RESUMO

Examining the nature of stress distribution within the intact tooth can aid in understanding how natural tooth structures are able to resist mechanical forces during masticatory function. Identification of potential fractures in teeth on clinical examination is essential for correct diagnosis, particularly if there is pulpal involvement. This discussion will consider the different types of fracture, their identification and management. This paper will highlight management of tooth fractures, including identifying prognostic indicators, which are largely dependent on the extent of the fracture within the tooth structure.


Assuntos
Síndrome de Dente Quebrado , Fraturas dos Dentes , Síndrome de Dente Quebrado/diagnóstico , Síndrome de Dente Quebrado/terapia , Humanos , Prognóstico , Tratamento do Canal Radicular , Fraturas dos Dentes/diagnóstico , Fraturas dos Dentes/terapia
3.
Am J Orthod Dentofacial Orthop ; 159(2): 234-245, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33546828

RESUMO

Autotransplantation of a mature premolar in adults can be a treatment of choice for tooth replacement when combined with well-planned orthodontic treatment. This case report describes the successful treatment of a 39-year-old patient with severe crowding and a hopelessly fractured tooth on the maxillary left side. Maxillary dental crowding was relieved by extraction of a premolar on the right side, and this extracted tooth was autotransplanted to replace the fractured tooth. A mandibular incisor was extracted to correct anterior crossbite. The total treatment period was 20 months. The treatment results showed a good long-term prognosis after transplantation of a mature premolar with normal surrounding alveolar bone level for over 6 years of follow-up. Occlusion and periodontal health were excellent in the long term.


Assuntos
Fraturas dos Dentes , Adulto , Dente Pré-Molar/cirurgia , Humanos , Incisivo , Mandíbula , Maxila , Fraturas dos Dentes/diagnóstico por imagem , Fraturas dos Dentes/cirurgia , Transplante Autólogo
5.
J Adhes Dent ; 23(1): 67-75, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33512117

RESUMO

PURPOSE: To investigate the fatigue performance and stress distribution of endodontically treated maxillary premolars with occlusal (O), mesio-occlusal (MO), or mesio-occluso-distal (MOD) cavities filled directly with bulk-fill composite. Materials and Methods: Besides the intact teeth (control group), sixty sound maxillary first premolars, standardized by size and morphology, were subjected to root canal treatment and randomly allocated to three groups throughout cavity preparations (O/MO/MOD). All cavities were restored with a bulk-fill composite (Tetric N-Ceram Bulk fill) and universal adhesive (Tetric N-Bond Universal) using etch-and-rinse mode. Half of the specimens of each group underwent 20,000 thermocycles (5°C-55°C). All specimens were subjected to a 50-N load perpendicular to their buccal bevels on the palatal cusps for 1,200,000 cycles. The survival curve and fracture mode were analyzed by log-rank and Fisher's exact tests, respectively. Finite element analysis (FEA) was conducted to simulate the working condition of premolars with O/MO/MOD cavities. The von Mises stress and the first principal stress were calculated for three FEA models. Results: Premolars with O cavity restorations exhibited better stress distributions than did those with MO and MOD cavity restorations. Compared to the intact premolars, no significant difference was detected in the fatigue performance of O/MO/MOD restorations, regardless of whether they underwent thermocycling. Only one specimen presented unrestorable fracture, while the rest of the fractured premolars were restorable. Conclusion: The cavity design of endodontic premolars restored with a bulk-fill composite has no influence on the stress distribution or fatigue survival, with a biomechanical performance similar to that of an intact tooth.


Assuntos
Fraturas dos Dentes , Dente não Vital , Dente Pré-Molar , Resinas Compostas , Preparo da Cavidade Dentária , Restauração Dentária Permanente , Análise do Estresse Dentário , Humanos
6.
BMJ Case Rep ; 14(1)2021 Jan 28.
Artigo em Inglês | MEDLINE | ID: mdl-33509889

RESUMO

Electronic cigarettes (also known as e-cigarettes or electronic nicotine delivery systems) were invented in China in 2003 then introduced to the British market in 2007. They remain popular among the public and are deemed to be effective in reducing tobacco smoking (the UK being one of the first countries to embrace them in a harm reduction policy). However, reports in the media of e-cigarettes exploding are of concern, considering the potential functional and psychological impairment that lifelong disfigurement will cause, especially given their uptake among people of any age. We present a case of this rare, but dramatic, effect of e-cigarette use as a warning to the public.


Assuntos
Queimaduras/etiologia , Sistemas Eletrônicos de Liberação de Nicotina , Explosões , Fraturas Cominutivas/etiologia , Fraturas Maxilares/etiologia , Fraturas dos Dentes/etiologia , Fraturas Cominutivas/diagnóstico por imagem , Humanos , Imageamento Tridimensional , Masculino , Fraturas Maxilares/diagnóstico por imagem , Traumatismos Maxilofaciais/diagnóstico por imagem , Traumatismos Maxilofaciais/etiologia , Mucosa Bucal/lesões , Tomografia Computadorizada por Raios X , Fraturas dos Dentes/diagnóstico por imagem , Traumatismos Dentários/diagnóstico por imagem , Traumatismos Dentários/etiologia , Raiz Dentária/lesões , Adulto Jovem
7.
Spec Care Dentist ; 41(2): 195-201, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33333586

RESUMO

AIM: To assess and compare the prevalence of dental trauma in a population of 9- to 16-year-old children with partially impaired vision and sighted children of Jodhpur city, Rajasthan State in India. METHODS: In this cross-sectional study, 121 children with partial impairment of vision were compared with a control group of 356 sighted children for traumatic injuries to the permanent dentition. Children in both the group were aged between 9 and 16 years and residing in a residential school. The survey was carried out using Ellis and Davy's classification of tooth fracture. Data were analyzed using descriptive statistical analysis, and the Chi-square test was used to compare different variables with P < .05. RESULTS: The overall prevalence rates of traumatic dental injury (TDI) in the visually impaired and sighted groups were 24.79% and 9.39%, respectively (P = .000). Enamel fracture was the most common type of injury, and the maxillary central incisor was most frequently involved in both the groups. Children with overjet >3 mm sustained TDI more frequently in visually impaired children. TDI was higher in children with overjet ≤3 mm in sighted groups (P = .000). In both the groups children with inadequate lip coverage had higher occurrence of TDI (P = .000). CONCLUSION: Dental trauma appeared to be more frequent in visually impaired compared to sighted children. The unmet treatment need for children with TDI was very high.


Assuntos
Sobremordida , Fraturas dos Dentes , Traumatismos Dentários , Adolescente , Criança , Estudos Transversais , Humanos , Índia/epidemiologia , Prevalência , Instituições Acadêmicas , Fraturas dos Dentes/epidemiologia , Traumatismos Dentários/epidemiologia
8.
J Am Dent Assoc ; 152(2): 146-156, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33358237

RESUMO

BACKGROUND: The authors of this practice-based study estimated the risk of experiencing tooth fractures and crack progression over 3 years and correlated baseline patient-, tooth-, and crack-level characteristics with these outcomes. METHODS: Two-hundred-and-nine National Dental Practice-Based Research Network dentists enrolled a convenience sample of 2,601 participants with a cracked vital posterior tooth that had been examined for at least 1 recall visit over 3 years. Data were collected at the patient, tooth, and crack levels at baseline, annual follow-up visits, and any interim visits. Associations between these characteristics and the subsequent same-tooth fractures and crack progression were quantified. RESULTS: Of the 2,601 teeth with a crack or cracks at baseline, 78 (3.0%; 95% confidence interval, 2.4% to 3.7%) subsequently developed a fracture. Of the 1,889 patients untreated before year 1, 232 (12.3%; 95% confidence interval, 10.9% to 13.8%) had some type of crack progression. Baseline tooth-level characteristics associated with tooth fracture were the tooth was maxillary and had a wear facet through enamel and a crack was detectable with an explorer, on the facial surface, and in a horizontal direction. Crack progression was associated with males and teeth with multiple cracks at baseline; teeth with a baseline facial crack were less likely to show crack progression. There was no commonality between characteristics associated with tooth fracture and those associated with crack progression. CONCLUSIONS: Development of tooth fractures and crack progression over 3 years were rare occurrences. Specific characteristics were associated with the development of tooth fracture and crack progression, although none were common to both. PRACTICAL IMPLICATIONS: This information can aid dentists in assessing factors that place posterior cracked teeth at risk of experiencing adverse outcomes.


Assuntos
Síndrome de Dente Quebrado , Fraturas dos Dentes , Dente , Esmalte Dentário , Humanos , Masculino , Fraturas dos Dentes/epidemiologia , Fraturas dos Dentes/etiologia
9.
Dent Traumatol ; 37(1): 4-16, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33350579

RESUMO

The life and professional contributions to dental traumatology of Dr. Jens Ove Andreasen are described in terms of his research, writing, teaching, and leadership.


Assuntos
Avulsão Dentária , Fraturas dos Dentes , Traumatismos Dentários , Traumatologia , Humanos , Traumatismos Dentários/terapia , Reimplante Dentário
10.
Rev. Asoc. Odontol. Argent ; 108(3): 153-156, dic. 2020. ilus
Artigo em Espanhol | LILACS | ID: biblio-1147976

RESUMO

La alta incidencia de fracturas dentarias producidas a distancia del tratamiento endodóntico ha llevado a desarrollar cambios en los procedimientos operatorios, con el objeto de conservar la mayor cantidad de estructura dentaria durante la terapia de conductos radiculares. En relación con esta idea, el sistema TruNatomy trabaja sobre el concepto de endodoncia mínimamente invasiva. Una zona altamente sensible a ser considerada es el área pericervical, delimitada 4 mm por encima y 4 mm por debajo de la cresta ósea. El objetivo del presente informe es analizar las propiedades y las características técnicas del sistema de instrumentación Tru- Natomy y los cambios conceptuales que su utilización implica (AU)


The high incidence of dental fractures in the long-term after endodontic treatment has led to analyzed how to change the endodontic procedures to preserve the dental structure during root canal therapy. The TruNatomy system was developed based on the concept of Minimally Invasive Endodontics. A highly sensitive zone to be considered is the pericervical area, restricted to 4 mm above and 4 mm below the bone crest. The objective of this report is to analyze the properties and technical characteristics of the TruNatomy instrumentation system and the changes in the concepts in the clinical treatment procedures as a result of its use (AU)


Assuntos
Fraturas dos Dentes/prevenção & controle , Preparo de Canal Radicular/instrumentação , Instrumentos Odontológicos , Procedimentos Cirúrgicos Minimamente Invasivos , Colo do Dente
11.
J Indian Soc Pedod Prev Dent ; 38(3): 253-258, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33004723

RESUMO

Background: In cases where there is an extensive loss of crown structure, these treatments require intracanal posts placement for retention as occlusal forces make the tooth structure weak and prone to fracture. Thus, restoration of primary anterior teeth, followed by post placement and cementation with pediatric zirconia crowns helps withstand masticatory forces to a greater extent. Aim: This in vitro study evaluates the compressive strength of two different post systems in the primary anterior teeth, restored with pediatric zirconia crowns. Materials and Methods: The present study was an in vitro, experimental, comparative study, with a study sample selected using a convenience sampling method. Forty-five primary anterior teeth were obturated and restored with enhanced omega-shaped loop and reinforced glass-fiber posts were cemented with pediatric zirconia crowns. The compressive strength and the type of fracture were evaluated for each group. Results: This study demonstrated that the glass-fiber posts had a higher compressive strength, although omega-shaped posts showed a higher presence of favorable fracture. Conclusion: Retentive omega-shaped loops and reinforced glass-fiber posts were both capable of withstanding high fracture loads. The addition of cemented pediatric zirconia crown on decayed primary anterior teeth restored with post systems helped withstand the load to a greater extent.


Assuntos
Técnica para Retentor Intrarradicular , Fraturas dos Dentes , Criança , Força Compressiva , Coroas , Humanos , Zircônio
12.
Rev. Cient. CRO-RJ (Online) ; 5(1): 87-91, Jan.-Apr. 2020.
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1139982

RESUMO

The management of fractured permanent teeth due to dental trauma in young patients is a challenge that requires an efficient approach. Objective: Describe a conservative and multidisciplinary treatment of a case of dental trauma in a 13 years-old boy. Case report: At clinical examination was verified enamel and dentin fracture in the left upper central incisor and a fracture with pulp exposure in the right upper lateral incisor, with subgingival extension of its margin at lingual surface, and no swelling or tooth displacement was observed. At radiographic evaluation, no pulp or periradicular disturbances were verified. It was proposed the surgical lengthening of the clinical crown of the right upper lateral incisor for later performing endodontic treatment. It was decided to make direct composite resin restorations in both fractured teeth, instead of doing a prosthetic treatment in the affected lateral incisor, such as the placement of a full ceramic crown, in an attempt to perform a less invasive treatment, mainly due to the age of the patient. At a two years follow-up visit was observed the maintenance of the health of periapical tissues and the absence of clinical alterations. Conclusion: The restorations were kept in good conditions and aesthetics was considered satisfactory by professionals, patient and parents.


Introdução: O manejo de dentes permanentes fraturados por traumatismo dentário em pacientes jovens é desafiador e requer uma abordagem eficiente. Objetivo: Descrever o tratamento conservador e multidisciplinar em um caso de traumatismo dentário de um menino de 13 anos de idade. Relato do caso: Ao exame clínico foi verificada uma fratura de esmalte e dentina no incisivo central superior esquerdo e uma fratura complicada no incisivo lateral superior direito, com extensão subgengival da margem na face palatina, e não foram observados edema ou deslocamento dentário. Ao exame radiográfico, não foram verificadas alterações pulpares ou perirradiculares. Foi proposta realização de aumento da coroa clínica do incisivo lateral superior direito para posterior realização do tratamento endodôntico. Para os dois dentes traumatizados foi proposta a realização de restauração direta com resina composta, proporcionando um tratamento menos invasivo ao incisivo lateral superior direito, ao invés de submetê-lo a um tratamento protético, como a colocação de uma coroa total cerâmica, principalmente devido à pouca idade do paciente. Na visita de dois anos de acompanhamento, observou-se a manutenção da saúde dos tecidos periapicais e ausência de alterações clínicas. Conclusão: As restaurações se mantiveram em boas condições e a estética foi considerada satisfatória pelos profissionais, paciente e pais.


Assuntos
Traumatismos Dentários , Dentição Permanente , Doenças Dentárias , Fraturas dos Dentes , Doenças Estomatognáticas , Adolescente , Tratamento Conservador , Incisivo
13.
Oral Maxillofac Surg Clin North Am ; 32(4): 631-638, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32891536

RESUMO

Dental trauma and injuries to the dentition are difficult to treat because the treatment goals serve to restore esthetics and function. The oral and maxillofacial surgeon is often called on to coordinate the efforts of rehabilitation after a dentoalveolar injury. A comprehensive understanding of the ideal treatments and use of endodontic, orthodontic, periodontal, and pediatric dental colleagues leads to the best possible results with regards to a restoration of form and function. This article provides a succinct review of the oral and maxillofacial surgeon's treatment in dentoalveolar trauma. Epidemiology, treatment, and preventative measures are discussed in this article.


Assuntos
Fraturas dos Dentes , Criança , Estética Dentária , Humanos
14.
Artigo em Inglês | MEDLINE | ID: mdl-32867387

RESUMO

In this retrospective study, we identified risk factors for tooth loss in patients undergoing mid-long-term maintenance therapy. We surveyed 674 maintenance patients for ≥5 years after active treatment who visited a dental clinic between January 2015 and December 2016. Of these, 265 were men (mean age 54.6 ± 8.0 years old) and 409 were women (mean age 54.0 ± 7.9 years old). Study variables included patient compliance, sex, number of teeth lost, cause of tooth loss (dental caries, periodontal disease, root fracture, others, vital or non-vital teeth), age at start of maintenance, number of remaining teeth at start of maintenance, smoking, use of salivary secretion inhibitors, presence of diabetes mellitus, condition of periodontal bone loss, and use of a removable denture. Most lost teeth were non-vital teeth (91.7% of all cases) and the most common cause of tooth loss was tooth fracture (62.1% of all cases). A statistically significant risk factors for tooth loss was number of remaining teeth at the start of maintenance (p = 0.003).


Assuntos
Cárie Dentária , Doenças Periodontais , Fraturas dos Dentes , Perda de Dente , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco , Perda de Dente/epidemiologia
15.
Rev. esp. cir. oral maxilofac ; 42(3): 127-131, jul.-sept. 2020. ilus
Artigo em Espanhol | IBECS | ID: ibc-196628

RESUMO

OBJETIVOS: Evaluar la estabilidad de osteosíntesis transmucosas, en casos de fracturas conminutas dentoalveolares, evitando la desperiostización de los fragmentos, para así mantener la vascularización de estos, favoreciendo la regeneración y pronóstico de las piezas dentarias y los segmentos óseos. MATERIALES Y MÉTODOS: Se realizó osteosíntesis transmucosa con placas de perfil delgado (0,5 y 0,7 mm dePuy Synthes - Matrix Midface Kit) para la reducción de fracturas de procesos alveolares en 3 localizaciones de 2 pacientes que en asociación presentaban fracturas faciales complejas tratadas con reducción abierta y fijación interna convencional. Además se instalaron férulas con alambres de acero de 0,5 mm en los dientes involucrados. RESULTADOS: Se logró una correcta reducción, corrección y fijación de los fragmentos y la conservación de dientes involucrados en las 3 localizaciones, observable tanto clínicamente como en las tomografías computarizadas a los 3 y 7 meses. Además, se retiraron las placas de osteosíntesis de forma ambulatoria y mediante anestesia local. CONCLUSIONES: La estabilización y fijación con placas transmucosas favorece la consolidación de los segmentos afectados sin afectar el aporte vascular. Sin embargo, este método puede considerarse una medida de asistencia a la reducción abierta con fijación interna, que sigue siendo la medida de primera elección


OBJECTIVES: To assess the stability of transmucosal osteosynthesis in cases of comminuted dentoalveolar fractures, avoiding the deperiostization of fragments to maintain their vascularization, favoring the regeneration and prognosis of dental pieces and bone segments. MATERIALS AND METHODS: Transmucosal osteosynthesis with low-profile plates (0.5 and 0.7 mm of Puy Synthes - Matrix Midface Kit) was performed to reduce fractures of alveolar processes in 3 locations of 2 patients, who in association had complex facial fractures treated with open reduction and conventional internal fixation. Furthermore, splints with 0.5 mm steel wires were installed on the teeth involved. RESULTS: A correct reduction, correction, and fixation of the fragments and the preservation of teeth involved in the 3 locations, observable both clinically and in CT scans at 3 and 7 months was achieved. Besides, the osteosynthesis plates were removed on an outpatient basis and by local anesthesia. CONCLUSIONS: Stabilization and fixation with transmucosal plates favors the consolidation of the affected segments without affecting the vascular supply. However, this method can be considered an open reduction assistance measure with internal fixation, which remains the first-choice measure


Assuntos
Humanos , Fraturas dos Dentes/cirurgia , Fixação Interna de Fraturas/métodos , Placas Ósseas , Traumatismos Faciais/cirurgia , Resultado do Tratamento
16.
J Hist Dent ; 68(2): 68-70, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32852268

RESUMO

Historically, many teeth that had been traumatized resulted in extractions and replacements with a fixed partial denture (bridge). However, in rare situations some clinicians provided creative approaches to tooth retention much like what is done today, 125 years later.


Assuntos
Fraturas dos Dentes , Coroas , Prótese Parcial Fixa , História do Século XIX , Humanos , Fraturas dos Dentes/história , Fraturas dos Dentes/terapia
17.
Biol Lett ; 16(8): 20200498, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32842897

RESUMO

Teeth of omnivores face a formidable evolutionary challenge: how to protect against fracture and abrasive wear caused by the wide variety of foods they process. It is hypothesized that this challenge is met in part by adaptations in enamel microstructure. The low-crowned teeth of humans and some other omnivorous mammals exhibit multiple fissures running longitudinally along the outer enamel walls, yet remain intact. It is proposed that inter-prism weakness and enamel property gradation act together to avert entry of these fissures into vulnerable inner tooth regions and, at the same time, confer wear resistance at the occlusal surface. A simple indentation experiment is employed to quantify crack paths and energetics in human enamel, and an extended-finite-element model to evaluate longitudinal crack growth histories. Consideration is given as to how tooth microstructure may have played a vital role in human evolution, and by extension to other omnivorous mammals.


Assuntos
Fraturas dos Dentes , Dente , Animais , Esmalte Dentário , Humanos
18.
Cient. dent. (Ed. impr.) ; 17(2): 115-120, mayo-ago. 2020. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-195099

RESUMO

INTRODUCCIÓN: el tratamiento de conductos produce cambios físico-químicos en la dentina y una pérdida estructural significativa para el diente, lo que lo hace más susceptible a la fractura. MATERIAL Y MÉTODOS: 64 premolares mandibulares fueron decoronados y divididos aleatoriamente en cuatro grupos (n = 16): grupo control (CG) no tratado, grupo instrumentado ProTaperGold® (PTG®) (25.08), grupo instrumentado ProTaperNext® (PTN®) (25.06) y grupo instrumentado WaveOne Gold PRIMARY® (WOG®) (25.07). Durante la instrumentación, se realizó la irrigación con NaOCl al 5,25% con una jeringa Monoject® y tras la instrumentación, las muestras se irrigaron con NaOCl, EDTA 17% y NaOCl activado sónicamente. Los conductos radiculares se obturaron utilizando el sistema B&L®, y posteriormente se colocaron en bloques de resina acrílica estandarizados para ser cargados con una fuerza vertical constan-te de 0,02 mm/s hasta que se produjo la fractura de la raíz, mediante una máquina de ensayo universal (ME-405/20, Servo-sis®). Las comparaciones entre grupos se analizaron con la prueba ANOVA.RESULTADOS: No hubo diferencias esta-dísticamente significativas (p > 0,05) entre el GC y los grupos instrumentados con PTN® y WOG®; tampoco entre los grupos PTN® y WOG®. Sin embargo, se obtuvieron diferencias estadísticamente significativas entre el grupo instrumentado con PTG® y el resto de los grupos, siendo el grupo PTG® el más susceptible a la frac-tura. CONCLUSIONES: El sistema PTG® fue el que más debilitó las raíces después de la instrumentación, en comparación con los sistemas WOG® y PTN®


INTRODUCTION: root canal treatment produces physicist-chemist changes in the dentine and a significant structural loss for the tooth what makes it more susceptible to fracture. MATERIAL AND METHODS: 64 mandibular premolar were decoronated and randomly divided into four groups (n = 16): control group (CG) non-treated, ProTaper Gold(TM) (PTG(TM)) instrumented group (25.08), ProTaper Next(TM) (PTN(TM)) instrumented group (25.06) and WaveOne Gold(TM) PRIMARY (WOG(TM)) instrumented group (25.07). While shaping, cleaning was done with NaOCl 5,25% using a Monoject(TM) syringe and after shaping, roots were irrigated with NaOCl, EDTA 17% and NaOCl sonically activated. Root canals were obturated using B&L(TM) system, embedded into standardized acrylic resin blocks and load with a constant vertical force of 0,02 mm/s until root fracture was produced using a universal testing machine (ME-405/20, Servosis(TM)). Comparisons among groups were analyzed with ANOVA test. RESULTS: There were no statistically significant differences (p > 0.05) between the CG and the groups instrumented with PTN(TM) and WOG(TM); neither among PTN(TM) and WOG(TM) groups. However, statistically significant differences were obtained between the group instrumented with PTG(TM) and the rest of the groups being PTG(TM) group the most susceptible to fracture. CONCLUSIONS: PTG(TM) system was the one that weakened more the roots after the instrumentation in comparison with the WOG(TM) and PTN(TM) systems


Assuntos
Humanos , Preparo da Cavidade Dentária/métodos , Fraturas dos Dentes/etiologia , Fraturas dos Dentes/terapia , Dente Pré-Molar/lesões , Preparo de Canal Radicular/instrumentação , Materiais Restauradores do Canal Radicular/uso terapêutico , Restauração Dentária Permanente/métodos , Análise de Variância , Irrigantes do Canal Radicular/uso terapêutico
19.
Int J Prosthodont ; 33(4): 457-464, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32639706

RESUMO

Cusp fractures occur frequently in endodontically treated teeth with large restorations and no cusp protection. These fractures often lead to challenging clinical decisions, such as whether to undertake complex restorative management or extraction of the affected teeth. This article reports the surgical and restorative management of two teeth with fractures exceeding the biologic width to juxtacrestal and subcrestal levels, respectively, and describes a new technique for such treatment.


Assuntos
Fraturas dos Dentes , Dente não Vital , Dente Pré-Molar , Resinas Compostas , Restauração Dentária Permanente , Humanos
20.
J Adhes Dent ; 22(4): 409-414, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32666067

RESUMO

PURPOSE: Immature teeth are characterized by short roots, thin root canal walls, and open apices, which makes them prone to fracture. The aim was to investigate whether fiber-post placement had an influence on the fracture resistance of endodontically treated immature teeth. MATERIALS AND METHODS: To simulate immature teeth, the apical third of 20 intact mandibular premolars was resected. After the access cavity was prepared, root canals and apices were enlarged. A 4-mm apical barrier was placed using calcium-silicate based material (Biodentine, Septodont). The teeth were then randomly assigned to two groups (n = 10). Root canals in group 1 were sealed using Acroseal (Septodont, France) and gutta-percha, followed by composite resin for the coronal restoration (Evetric, Ivoclar Vivadent). In group 2, fiber posts (FRC Postec Plus, Ivoclar Vivadent) were luted using self-adhesive composite cement (SpeedCEM Plus, Ivoclar Vivadent), followed by the same coronal restoration. The teeth were then subjected to fatigue and static load testing. RESULTS: The average loads (± SD) that led to tooth fracture were: 401.40 ± 296.83 N in group 1 and 636.20 ± 204.95 N in group 2. Unfavorable fractures were noted in 9 specimens from group 1 and in 7 specimens in group 2. No statistically significant difference in fracture resistance or fracture mode was found between the groups. CONCLUSION: Fiber-post placement had no significant influence on the fracture resistance of endodontically treated immature teeth.


Assuntos
Técnica para Retentor Intrarradicular , Fraturas dos Dentes , Dente não Vital , Dente Pré-Molar , Resinas Compostas , Análise do Estresse Dentário , Humanos , Teste de Materiais
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