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1.
Endodoncia (Madr.) ; 38(2): 14-19, oct. 2020. ilus
Artículo en Español | IBECS | ID: ibc-198455

RESUMEN

INTRODUCCIÓN: Un ferrule de 2 mm a 3600 asegura la supervivencia a largo plazo del diente restaurado. Sin embargo, existen situaciones clínicas donde el ferrule es insuficiente. Existen básicamente 3 opciones de tratamiento para la obtención de ferrule sin invadir el espacio biológico: el alargamiento de corona quirúrgico, la extrusión ortodóntica rápida y la extrusión quirúrgica. CASO CLÍNICO: EL presente caso clínico describe la restauración de un premolar inferior sin ferrule por medio de la extrusión quirúrgica, el retratamiento de conductos, y la colocación de poste y corona. CONCLUSIÓN: La extrusión quirúrgica permite, de manera altamente predecible restaurar dientes sin ferrule con raíces largas y periodontalmente sanos, sin comprometer los tejidos periodontales ni necesidad de aparatología ortodóntica


INTRODUCTION: A 2-mm ferrule over 3600 ensures a long-term survival of the restored tooth. However, there are clinical situations in which ferrule is insufficient. Thus, there are 3 treatment options to obtain ferrule without invading the biological width: surgical crown lengthening, rapid orthodontic extrusion and surgical extrusion. CLINICAL CASE: The present clinical case describes the restoration of a lower premolar without ferrule by means of surgical extrusion, root canal re-treatment, and post and crown. CONCLUSION: Surgical extrusion allows predictably the restoration of long, periodontally healthy teeth with no ferrule, without compromising the periodontal tissues or the need for orthodontic appliances


Asunto(s)
Humanos , Femenino , Persona de Mediana Edad , Extrusión Ortodóncica/métodos , Obturación del Conducto Radicular/métodos , Alargamiento de Corona/métodos , Técnica de Perno Muñón , Restauración Dental Permanente/métodos , Resultado del Tratamiento , Porcelana Dental/uso terapéutico
2.
Endodoncia (Madr.) ; 38(2): 20-25, oct. 2020. ilus
Artículo en Español | IBECS | ID: ibc-198456

RESUMEN

INTRODUCCIÓN: El primer molar superior se caracteriza por tener 3 raíces y cuatro conductos radiculares. La presencia de cuatro raíces es un hallazgo inusual, pocas veces reportado en la literatura. CASO CLÍNICO: Acude a la consulta un paciente caucásico con pulpititis irreversible del 2.6. Se decide iniciar el trata-miento de conductos, pero dada la diferente morfología radicular visible radiográficamente, se realiza una CBCT previa. En el corte axial, se aprecian 4 raíces, con ápices totalmente independientes. Además, la raíz mesiovestibular presenta un único conducto y forma redondeada. Con la ayuda del microscopio se realiza una apertura inusual y se localizan los cuatro conductos. Finalizadas la instrumentación, irrigación y obturación, se recubre el acceso cameral con composite, para la posterior realización de una incrustación, capaz de sellar la caries cervical y restaurar los puntos de contacto. En el control 2 años posterior, el paciente está totalmente asintomático y la restauración demuestra su funcionalidad y estética. CONCLUSIÓN: Las anomalías anatómicas pueden presentar-se en cualquier diente. Encontrar un primer molar superior con más de tres raíces es un hallazgo muy extraño, pero gracias a la ayuda de la radiología tridimensional, se pudo visualizar y tratar de forma adecuada. Ante cualquier imagen radiográfica donde no se pueda apreciar con claridad la anatomía dental a tratar, debemos realizar varias proyecciones radiográficas o una CBCT para poder conocer la morfología real a la que nos enfrentamos


INTRODUCTION: The upper first molar is characterized by having three roots and four root canals. The presence of four roots is an unusual finding, rarely reported in the literature. CLINICA CASE: A caucasian patient with irreversible pulpititis of 2.6 comes to the dental clinic. It was decided to start the root canal treatment, but due to the different root morphology visible radiographically, a previous CBCT was performed. In the axial section, 4 roots are seen, with completely independent apexes. Furthermore, the mesiovestibular root has a single canal and a rounded shape. With the help of the microscope, an unusual opening is made and the four canals are located. After the instrumentation, irrigation and obturation are completed, the cameral access is covered with composite, for the subsequent inlay, capable of sealing cervical caries and restoring the contact points. In the control 2 years later, the patient is completely asymptomatic and the restoration demonstrates its functionality and aesthetics. CONCLUSIONS: Anatomic anomalies occur in any tooth. Finding an upper first molar with more than three roots is a very strange finding, but thanks to the help of three-dimensional radiology, it was able to be properly visualized and treated. Before any radiographic image where the dental anatomy to be treated cannot be clearly seen, we must carry out several radiographic projections or a CBCT to be able to know the real morphology that we are facing


Asunto(s)
Humanos , Masculino , Adulto , Tratamiento del Conducto Radicular/métodos , Diente Molar/cirugía , Restauración Dental Permanente/métodos , Radiografía Dental , Raíz del Diente/diagnóstico por imagen , Tomografía Computarizada de Haz Cónico , Resultado del Tratamiento
3.
Cient. dent. (Ed. impr.) ; 17(2): 115-120, mayo-ago. 2020. ilus, tab
Artículo en Español | IBECS | ID: ibc-195099

RESUMEN

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


Asunto(s)
Humanos , Preparación de la Cavidad Dental/métodos , Fracturas de los Dientes/etiología , Fracturas de los Dientes/terapia , Diente Premolar/lesiones , Preparación del Conducto Radicular/instrumentación , Materiales de Obturación del Conducto Radicular/uso terapéutico , Restauración Dental Permanente/métodos , Análisis de Varianza , Irrigantes del Conducto Radicular/uso terapéutico
4.
Niger J Clin Pract ; 23(6): 798-804, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32525114

RESUMEN

Aims: The aim of this study was to evaluation the treatment success of the short post technique (mushroom restoration) using a composite resin in severely decayed primary anterior teeth after 6, 12, and 18 months after treatment. Methods: Eighteen children aged 3-5 years with severely decayed primary maxillary anterior teeth (60 anterior maxillary primary teeth in total) were included. Patients were treated under general anesthesia (GA). After pulpectomy, a "mushroom shape" was formed in the root canals for the purpose of retention, and the root canals were filled with zinc oxide-eugenol (ZOE), and the teeth were restored with composite resin. The status of treatment was evaluated clinically and radiographically for periapical radiolucency, pathological root resorption, marginal fracture, and loss of restoration for each treated tooth. All findings were recorded. Results: As a result of the evaluation criteria, the success rates at 6, 12 and 18 months were 86%, 80%, and 71%, respectively. None of the teeth showed apical radiolucency or pathological root resorption at the end of the 18th month period. Conclusion: The short-post (mushroom restorations) technique is a clinically acceptable alternative method for restoration of severely decayed primary teeth. This study supports the feasibility of treatment with this technique for pediatric patients treated under GA.


Asunto(s)
Restauración Dental Permanente/métodos , Técnica de Perno Muñón , Pulpectomía/métodos , Materiales de Obturación del Conducto Radicular/uso terapéutico , Diente Primario/cirugía , Cemento de Óxido de Zinc-Eugenol/uso terapéutico , Anestesia General , Preescolar , Resinas Compuestas/química , Caries Dental/complicaciones , Preparación de la Cavidad Dental , Extravasación de Materiales Terapéuticos y Diagnósticos/complicaciones , Femenino , Humanos , Masculino , Maxilar , Pulpectomía/efectos adversos , Resorción Radicular , Traumatismos de los Dientes/complicaciones , Resultado del Tratamiento
5.
West Afr J Med ; 37(3): 253-259, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32476119

RESUMEN

BACKGROUND: Stainless steel crown (SSC) restoration is one of the restorative treatment options in the management of carious primary molars. The Hall technique is a biologic method of managing carious primary teeth by sealing in the caries with SSCs without the routine local anaesthesia and tooth preparations. The objectives of this study was to compare the treatment assessments of the conventional stainless steel crown restoration with Hall technique using subjects' discomfort during treatments and parents' treatment perception, treatment acceptability and satisfaction with the treatment. METHODS: The study was a comparative analytical study involving the placement of 25 SSC restorations using the conventional method and 25 SSC restorations using the Hall technique in 25 subjects aged 3-8 years with a pair or pairs of unrestored enamel or dentinal carious primary molars matched for tooth type, dental arch and extent of caries. Discomfort during the placements of the SSCs was assessed by the subjects while treatment perception, acceptability and satisfaction were assessed by the parents with the use of questionnaires. RESULTS: There was statistically significant difference (p-value 0.00001) between the conventional method and the Hall technique for the discomfort outcomes. There was no statistically significant difference for treatment perception (p=0.73), acceptability (0.72) and satisfaction (0.60). CONCLUSION: The Hall Technique compared favourably well with the conventional method in treatment perception, acceptability and satisfaction but it gave higher level of discomfort in some of the subjects. The Hall Technique appears to be a good method for managing dental caries in primary molar teeth especially in a resource challenged environment where electricity and access to care are contending issues.


Asunto(s)
Coronas , Atención Dental para Niños/métodos , Caries Dental/terapia , Restauración Dental Permanente/métodos , Cementos de Resina/uso terapéutico , Acero Inoxidable , Niño , Preescolar , Aleaciones Dentales , Humanos , Diente Molar/patología , Diente Primario/patología , Resultado del Tratamiento
6.
J Appl Oral Sci ; 28: e20190544, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32348440

RESUMEN

Objective To evaluate the influence of three levels of dental structure loss on stress distribution and bite load in root canal-treated young molar teeth that were filled with bulk-fill resin composite, using finite element analysis (FEA) to predict clinical failure. Methodology Three first mandibular molars with extensive caries lesions were selected in teenager patients. The habitual occlusion bite force was measured using gnathodynamometer before and after endodontic/restoration procedures. The recorded bite forces were used as input for patient-specific FEA models, generated from cone-beam computed tomographic (CT) scans of the teeth before and after treatment. Loads were simulated using the contact loading of the antagonist molars selected based on the CT scans and clinical evaluation. Pre and post treatment bite forces (N) in the 3 patients were 30.1/136.6, 34.3/133.4, and 47.9/124.1. Results Bite force increased 260% (from 36.7±11.6 to 131.9±17.8 N) after endodontic and direct restoration. Before endodontic intervention, the stress concentration was located in coronal tooth structure; after rehabilitation, the stresses were located in root dentin, regardless of the level of tooth structure loss. The bite force used on molar teeth after pulp removal during endodontic treatment resulted in high stress concentrations in weakened tooth areas and at the furcation. Conclusion Extensive caries negatively affected the bite force. After pulp removal and endodontic treatment, stress and strain concentrations were higher in the weakened dental structure. Root canal treatment associated with direct resin composite restorative procedure could restore the stress-strain conditions in permanent young molar teeth.


Asunto(s)
Fuerza de la Mordida , Resinas Compuestas/química , Resinas Compuestas/uso terapéutico , Restauración Dental Permanente/métodos , Diente Molar , Diente no Vital/terapia , Niño , Fuerza Compresiva , Tomografía Computarizada de Haz Cónico , Análisis del Estrés Dental , Módulo de Elasticidad , Análisis de Elementos Finitos , Humanos , Modelación Específica para el Paciente , Valores de Referencia , Reproducibilidad de los Resultados , Resistencia a la Tracción , Diente no Vital/diagnóstico por imagen , Resultado del Tratamiento
7.
Niger J Clin Pract ; 23(4): 489-497, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32246655

RESUMEN

Objective: This prospective study aimed to evaluate the clinical performance of different restorative materials in primary molars with class II carious lesions. Materials and Methods: A total of 160 class II carious lesions (with radiographic involvement of the outer half of dentin) in 30 patients were randomly divided into four groups and restored with a glass ionomer restorative system (Equia™), two different bulk-fill composites (Sonicfill™ and X-tra fil™), and a nanohybrid composite (Filtek Z550™). The restorations were clinically and radiographically evaluated at the baseline, and 3, 6, and 12 months according to the modified United States Public Health Service criteria. Statistical analyses were performed using Pearson's Chi-square and McNemar tests. Results: After 1 year, 134 restorations were evaluated in 26 patients. Equia was statistically less successful than the other restorative materials in marginal adaptation and retention criteria (P < 0.05). However, no material was found to be superior to the others over the study period in marginal discoloration, color matching, secondary caries, anatomical form, and postoperative sensitivity (P > 0.05). Conclusion: The bulk-fill and conventional composites exhibited good clinical performance, and Equia exhibited minor changes over the 1-year trial period.


Asunto(s)
Resinas Acrílicas , Resinas Compuestas/uso terapéutico , Restauración Dental Permanente/métodos , Cementos de Ionómero Vitreo/uso terapéutico , Dióxido de Silicio , Adaptación Fisiológica , Biometría , Niño , Color , Adaptación Marginal Dental , Materiales Dentales , Dentina , Femenino , Estudios de Seguimiento , Humanos , Masculino , Diente Molar , Periodo Posoperatorio , Estudios Prospectivos , Diente Primario , Resultado del Tratamiento
8.
Niger J Clin Pract ; 23(3): 434-436, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32134047

RESUMEN

In today's dentistry, with the development of adhesive techniques and the improvement of resin-based materials, invasive restorative treatments have been replaced by minimally invasive or noninvasive restorative procedures. Fiber-reinforced adhesive bridges are minimal-invasive or noninvasive restorations that can be applied for definitive restoration in single tooth loss or short spans, where teeth or implant-supported fixed partial prosthesis cannot be applied. This case series describes the rehabilitation of three patients with anterior single tooth loss using the direct fiber-reinforced adhesive bridge. In all patients, esthetic and functional deficiencies in the missing tooth regions were solved with this minimally invasive technique, which is both cost-effective and conservative of tooth structures. During the three-year follow-up of these cases, there was neither fracture nor decementation in the restorations. Also, no caries or sensitivity was noted in the support teeth.


Asunto(s)
Resinas Compuestas , Restauración Dental Permanente/métodos , Dentadura Parcial , Pérdida de Diente/cirugía , Humanos , Procedimientos Quirúrgicos Mínimamente Invasivos , Diente Artificial
10.
Artículo en Inglés | MEDLINE | ID: mdl-32093253

RESUMEN

Stainless steel crowns are the most popular restoration technique for young permanent first molars treated endodontically. However, these restorations are not aesthetically appealing and need to be replaced. Endocrowns constitute a reliable approach for restoring severely damaged molars and premolars. Intraoral scanners (IOSs) are well tolerated by children and are easily and quickly implemented. We present an innovative treatment approach for endodontically treated teeth in children, using a digital workflow with IOS and computer-aided design/computer-assisted manufacturing (CAD/CAM) fabrication of the restoration. The protocol involves a thorough diagnostic phase and comprehensive treatment planning. Among the factors to be considered are the child's behavior, the parents' cooperation and compliance, and initial preparation including inhalation sedation, effective local anaesthesia and the use of a rubber dam. Full attention should be given to 1-2 mm of ferruling by the endocrown, which should be appropriately prepared to accommodate endocrowns for molars. IOSs include scanning of the prepared tooth and its antagonist, and scanning of the bite. CAD-CAM preparation of the restoration is followed by restoration bonding and follow up. Digital workflow should be considered in the treatment of endodontically treated molars since the high accuracy of the scanning enables definitive restoration in young patients.


Asunto(s)
Diseño Asistido por Computadora , Coronas , Restauración Dental Permanente/métodos , Diente no Vital , Flujo de Trabajo , Niño , Humanos , Diente Molar
11.
Niger J Clin Pract ; 23(2): 165-171, 2020 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-32031090

RESUMEN

Aims: The aim of this study is to evaluate the effect of the diode laser used for dentin sensitivity on the clinical success of non-carious cervical lesion (NCCL) restorations restored with different adhesive systems. Methods: 20 NCCLs were restorated with Universal Single Bond (Self Etch) (3M, USA) and Grandio (Voco, Germany), 20 NCCLs were restorated with Universal Single Bond (Total Etch) and Grandio. After diode laser application, 20 NCCLs were restorated with Universal Single Bond and Grandio, 20 NCCLs were restorated with Universal Single Bond (Total Etch) and Grandio. The restorations were clinical evaluated by two examiners at baseline, for 6 and 18 months using modified United States Public Health Service (USPHS) Criteria. Chi-square test was used for statistical analyse. Results: The lowest rates of retention was found in the Group 1. There was no statistically significant difference among the groups in marginal discoloration, marginal integrity, sensitivity (P > 0.05). Conclusion: Diode laser application prior to the restoration of teeth with NCCL don't reduce the retention rate of restorations, may reduce hypersensitivity and may affect the success of restoration. However, further laboratory and clinical studies are required.


Asunto(s)
Adhesivos/farmacología , Resinas Compuestas , Grabado Dental , Restauración Dental Permanente/métodos , Láseres de Semiconductores/uso terapéutico , Cuello del Diente , Adulto , Bisfenol A Glicidil Metacrilato , Adaptación Marginal Dental , Sensibilidad de la Dentina , Recubrimientos Dentinarios , Femenino , Estudios de Seguimiento , Humanos , Láseres de Semiconductores/efectos adversos , Masculino , Persona de Mediana Edad
12.
Forensic Sci Int ; 308: 110166, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32004996

RESUMEN

Conducting research in the field of forensic sciences with methodologies that simulate situations found in the day-to-day practice of a given field of expertise is relevant insofar as this approach can produce results that are as close as possible to reality. In this context, the present study provided situations based on burial in a mangrove environment to estimate the changes in the mechanical properties (Knoop microhardness, roughness and color) of dental restorations utilizing silver amalgam, composite resin and glass ionomer cement over the time of burial. The silver amalgam showed a significant increase in surface roughness and a reduction in Knoop microhardness. Composite resin showed a statistically significant increase in color variation, and the glass ionomer cement showed significant increases in color variation and Knoop microhardness. These results allowed us to conclude that teeth restored with silver amalgam, composite resin and glass ionomer cement submitted to burial in mangrove environments produce different changes in surface roughness, Knoop microhardness and color properties depending on the time of burial to which the victims were submitted. These proprieties could help the forensic sciences to estimate time intervals for burial in mangrove environments.


Asunto(s)
Resinas Compuestas/análisis , Amalgama Dental/análisis , Restauración Dental Permanente/métodos , Cementos de Ionómero Vitreo/análisis , Incisivo/química , Propiedades de Superficie , Animales , Brasil , Entierro , Bovinos , Color , Odontología Forense , Cambios Post Mortem , Humedales
13.
Microsc Res Tech ; 83(5): 472-480, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-31909532

RESUMEN

Few studies performed a microstructural analysis of dental restorations to evaluate fatigue impact under various tensions, because of a lack of analytical equipment. In this study, the fatigue of restorative materials was evaluated using the force tester's fatigue method at 0.30, 0.3, 0.40, and 0.45 N. The fatigue effect analysis of tooth restorations was performed with each sample by randomly dividing the sequence into grades 0-4 and the evaluators were blinded to the test results. The evaluation methods involved visual and stereoscopic approaches, and used synchrotron radiation (SR). The evaluation facilitated the observation of microscopic cracks in the material using SR. The initiation of cracks was attributed to air bubbles, invisible to the naked eye or under the microscope. The fatigue effect analysis using SR enabled closer observations compared with other types of evaluation. We expect that this strategy will provide a basis for the study of physical and mechanical properties of dental materials.


Asunto(s)
Materiales Dentales/efectos de la radiación , Restauración Dental Permanente/métodos , Fenómenos Mecánicos/efectos de la radiación , Sincrotrones , Materiales Dentales/análisis , Ensayo de Materiales , Microscopía
14.
Mymensingh Med J ; 29(1): 228-233, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31915363

RESUMEN

Reattachment of a fractured fragment to the remaining tooth is challenging but one of the best treatment protocols in regards to aesthetics, function as well as patients acceptance. If the original tooth fragment is retained following fracture, the natural tooth structures can be reattached using adhesive protocols to ensure reliable strength, durability and aesthetics. This case report will discuss a 13 years old boy with a complicated crown-root fracture of maxillary right central incisor tooth. The procedure used to repair the fracture regarding this case including flap surgery with endodontic treatment. The root canal was filled with a root canal sealer and gutta-percha. After root canal obturation, fragment was reattached with an adhesive tooth reattachment technique. After 6 months evaluation, clinical and radiographic examinations showed a stable re-attachment, good aesthetic and healthy periodontium.


Asunto(s)
Recubrimiento Dental Adhesivo , Restauración Dental Permanente/métodos , Incisivo/lesiones , Fracturas de los Dientes/terapia , Adolescente , Resinas Compuestas , Humanos , Masculino , Maxilar , Fracturas de los Dientes/complicaciones , Resultado del Tratamiento
15.
Braz Oral Res ; 33: e125, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-31994598

RESUMEN

Atraumatic Restorative Treatment (ART) is one of the strategies used to control dental caries; it involves hand instruments for removal of carious tissue, and restorations using high-viscosity Glass Ionomer Cement (GIC). The present controlled clinical trial aimed to evaluate the performance of low-cost GIC indicated for ART in primary teeth, compared with high-viscosity GIC, after one year of follow-up. Two-to six-year-old children with dentin caries lesions on one or two surfaces of anterior and posterior teeth were selected. The children were randomly assigned to 2 groups according to the restorative material used: G1 (control) - Ketac Molar®; G2 (experimental) - Vitro Molar®. Treatments were performed in a school setting, following the guidelines of the ART. A total of 728 restorations were performed in 243 children. Descriptive analysis and Poisson regression were applied, with a significance level of p < 0.05. After 12 months, 559 (76.8%) restorations were re-evaluated. The success rate was evaluated by the prevalence ratio (PR), associated with restorations performed in primary second molars (PR = 1.21; 95%CI = 1.03-1.42), and with small (PR = 1.35; 95%CI = 1.14-1.60) or medium cavities (PR = 1.29; 95%CI = 1.08-1.55), using Ketac Molar® material (PR= 1.07; 95%CI = 1.01-1.15), considering p < 0.05. Small or medium restorations in primary second molars performed with high-viscosity GIC (Ketac Molar®) were more successful than restorations performed with low-cost GIC indicated for ART.


Asunto(s)
Tratamiento Restaurativo Atraumático Dental/métodos , Caries Dental/terapia , Cementos de Ionómero Vitreo/química , Niño , Preescolar , Índice CPO , Fracaso de la Restauración Dental , Restauración Dental Permanente/métodos , Femenino , Cementos de Ionómero Vitreo/uso terapéutico , Humanos , Masculino , Ensayo de Materiales , Distribución de Poisson , Factores de Tiempo , Diente Primario , Resultado del Tratamiento , Viscosidad
16.
J Appl Oral Sci ; 28: e20190042, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-31778443

RESUMEN

INTRODUCTION: Gap formation of composite resin restorations is a serious shortcoming in clinical practice. Polymerization shrinkage stress exceeds the tooth-restoration bond strength, and it causes bacterial infiltration within gaps between cavity walls and the restorative material. Thus, an intermediate liner application with a low elastic modulus has been advised to minimize polymerization shrinkage as well as gap formation. OBJECTIVE: The purpose of this in vitro study was to assess gap formation volume in premolars restored with different bulk-fill composites, with and without a resin-modified glass-ionomer cement (RMGIC) liner, using x-ray micro-computed tomography (micro-CT). METHODOLOGY: Sixty extracted human maxillary premolars were divided into six groups according to bucco-palatal dimensions (n=10). Standardized Class II mesio-occluso-distal cavities were prepared. G-Premio Bond (GC Corp., Japan) was applied in the selective-etch mode. Teeth were restored with high-viscosity (Filtek Bulk Fill, 3M ESPE, USA)-FB, sonic-activated (SonicFill 2, Kerr, USA)-SF and low viscosity (Estelite Bulk Fill Flow, Tokuyama, Japan)-EB bulk-fill composites, with and without a liner (Ionoseal, Voco GmbH, Germany)-L. The specimens were subjected to 10,000 thermocycles (5-55°C) and 50,000 simulated chewing cycles (100 N). Gap formation based on the volume of black spaces at the tooth-restoration interface was quantified in mm3 using micro-computed tomography (SkyScan, Belgium), and analyses were performed. Data were analyzed using repeated-measures ANOVA and the Bonferroni correction test (p < 0.05). RESULTS: The gap volume of all tested bulk-fill composites demonstrated that Group SF (1.581±0.773) had significantly higher values than Group EB (0.717±0.679). Regarding the use of a liner, a significant reduction in gap formation volume was observed only in Group SFL (0.927±0.630) compared with Group SF (1.581±0.773). CONCLUSION: It can be concluded that different types of bulk-fill composite resins affected gap formation volume. Low-viscosity bulk-fill composites exhibited better adaptation to cavity walls and less gap formation than did sonic-activated bulk-fill composites. The use of an RMGIC liner produced a significant reduction in gap formation volume for sonic-activated bulk-fill composites.


Asunto(s)
Resinas Compuestas/química , Preparación de la Cavidad Dental/métodos , Materiales Dentales/química , Restauración Dental Permanente/métodos , Imagenología Tridimensional/métodos , Polimerizacion , Análisis del Estrés Dental , Humanos , Técnicas In Vitro , Ensayo de Materiales , Cementos de Resina , Microtomografía por Rayos X
17.
Gen Dent ; 68(1): 30-35, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-31859659

RESUMEN

Occasionally, tooth fractures may demonstrate exaggerated pathologic root migration (PRM), often resulting in tooth loss. The early propagation of the root fracture may not be readily identifiable through clinical inspection and conventional radiographic imaging. Ultimately, increased root separation, isolated deep periodontal probing depth, and characteristic radiolucent changes may facilitate the diagnosis. This article describes 3 patients with unusual presentations of PRM in endodontically treated teeth restored with full-coverage crowns. One case illustrates the use of cone beam computed tomography for restorative assessment following root separation. Although it is efficacious to place crowns on most posterior endodontically treated teeth to maintain structural integrity, patients may remain at risk for catastrophic PRM and tooth loss. Timely extraction of teeth with hopeless PRM may minimize underlying bone resorption and the need for osseous regenerative procedures, ultimately improving the dental implant recipient site.


Asunto(s)
Restauración Dental Permanente/métodos , Fracturas de los Dientes , Raíz del Diente , Diente no Vital , Tomografía Computarizada de Haz Cónico , Coronas , Humanos , Fracturas de los Dientes/rehabilitación , Raíz del Diente/patología , Diente no Vital/rehabilitación
18.
Clin Oral Investig ; 24(3): 1321-1331, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-31297659

RESUMEN

OBJECTIVES: The purpose of this study was to evaluate the 2-year success of resin composite restorations in non-carious cervical lesions (NCCLs) using the direct or semi-direct techniques. MATERIALS AND METHODS: Thirty volunteers presenting with at least two NCCLs were included. Each participant received one restoration using the direct technique and the other using the semi-direct technique, totaling 60 restorations. Time for completing the treatment was computed. Assessments at baseline, 7 days, and 6, 12, and 24 months were performed using the modified United States Public Health Service criteria. Descriptive analysis was reported as a percentage of successful treatments. For inferential analysis, the Student t test was used to evaluate the differences between extension, depth, and time. The chi-square/Fisher tests were used to compare treatment success after each period (α = 0.05). The results were evaluated by using the Kaplan-Meier survival analysis. RESULTS: Differences were detected regarding mean ± standard deviation time, in which direct and semi-direct procedures were accomplished in 21.8 (± 14.5) and 35.3 (± 19.9) min, respectively. Of the 60 restorations placed, 7 failed in the direct group while 8 failed in the semi-direct group up to 2 years. No differences were detected between restorative protocols. The cumulative survival was 88.5% and 88.4% for the direct technique and semi-direct techniques after 24 months, respectively. CONCLUSION: The tested restorative protocols present similar results for NCCLs within the studied periods. CLINICAL RELEVANCE: The semi-direct technique exhibited clinical performance similar to direct technique for NCCL, demonstrating an alternative for restorations of these lesions.


Asunto(s)
Resinas Compuestas , Restauración Dental Permanente/métodos , Cuello del Diente/patología , Anciano , Adaptación Marginal Dental , Femenino , Humanos , Masculino , Persona de Mediana Edad
19.
J. appl. oral sci ; 28: e20190042, 2020. graf
Artículo en Inglés | LILACS, BBO - Odontología | ID: biblio-1056592

RESUMEN

Abstract Gap formation of composite resin restorations is a serious shortcoming in clinical practice. Polymerization shrinkage stress exceeds the tooth-restoration bond strength, and it causes bacterial infiltration within gaps between cavity walls and the restorative material. Thus, an intermediate liner application with a low elastic modulus has been advised to minimize polymerization shrinkage as well as gap formation. Objective: The purpose of this in vitro study was to assess gap formation volume in premolars restored with different bulk-fill composites, with and without a resin-modified glass-ionomer cement (RMGIC) liner, using x-ray micro-computed tomography (micro-CT). Methodology: Sixty extracted human maxillary premolars were divided into six groups according to bucco-palatal dimensions (n=10). Standardized Class II mesio-occluso-distal cavities were prepared. G-Premio Bond (GC Corp., Japan) was applied in the selective-etch mode. Teeth were restored with high-viscosity (Filtek Bulk Fill, 3M ESPE, USA)-FB, sonic-activated (SonicFill 2, Kerr, USA)-SF and low viscosity (Estelite Bulk Fill Flow, Tokuyama, Japan)-EB bulk-fill composites, with and without a liner (Ionoseal, Voco GmbH, Germany)-L. The specimens were subjected to 10,000 thermocycles (5-55°C) and 50,000 simulated chewing cycles (100 N). Gap formation based on the volume of black spaces at the tooth-restoration interface was quantified in mm3 using micro-computed tomography (SkyScan, Belgium), and analyses were performed. Data were analyzed using repeated-measures ANOVA and the Bonferroni correction test (p < 0.05). Results: The gap volume of all tested bulk-fill composites demonstrated that Group SF (1.581±0.773) had significantly higher values than Group EB (0.717±0.679). Regarding the use of a liner, a significant reduction in gap formation volume was observed only in Group SFL (0.927±0.630) compared with Group SF (1.581±0.773). Conclusion: It can be concluded that different types of bulk-fill composite resins affected gap formation volume. Low-viscosity bulk-fill composites exhibited better adaptation to cavity walls and less gap formation than did sonic-activated bulk-fill composites. The use of an RMGIC liner produced a significant reduction in gap formation volume for sonic-activated bulk-fill composites.


Asunto(s)
Humanos , Resinas Compuestas/química , Imagenología Tridimensional/métodos , Preparación de la Cavidad Dental/métodos , Materiales Dentales/química , Restauración Dental Permanente/métodos , Polimerizacion , Técnicas In Vitro , Ensayo de Materiales , Cementos de Resina , Análisis del Estrés Dental , Microtomografía por Rayos X
20.
J. appl. oral sci ; 28: e20190042, 2020. graf
Artículo en Inglés | LILACS, BBO - Odontología | ID: biblio-1090784

RESUMEN

Abstract Gap formation of composite resin restorations is a serious shortcoming in clinical practice. Polymerization shrinkage stress exceeds the tooth-restoration bond strength, and it causes bacterial infiltration within gaps between cavity walls and the restorative material. Thus, an intermediate liner application with a low elastic modulus has been advised to minimize polymerization shrinkage as well as gap formation. Objective: The purpose of this in vitro study was to assess gap formation volume in premolars restored with different bulk-fill composites, with and without a resin-modified glass-ionomer cement (RMGIC) liner, using x-ray micro-computed tomography (micro-CT). Methodology: Sixty extracted human maxillary premolars were divided into six groups according to bucco-palatal dimensions (n=10). Standardized Class II mesio-occluso-distal cavities were prepared. G-Premio Bond (GC Corp., Japan) was applied in the selective-etch mode. Teeth were restored with high-viscosity (Filtek Bulk Fill, 3M ESPE, USA)-FB, sonic-activated (SonicFill 2, Kerr, USA)-SF and low viscosity (Estelite Bulk Fill Flow, Tokuyama, Japan)-EB bulk-fill composites, with and without a liner (Ionoseal, Voco GmbH, Germany)-L. The specimens were subjected to 10,000 thermocycles (5-55°C) and 50,000 simulated chewing cycles (100 N). Gap formation based on the volume of black spaces at the tooth-restoration interface was quantified in mm3 using micro-computed tomography (SkyScan, Belgium), and analyses were performed. Data were analyzed using repeated-measures ANOVA and the Bonferroni correction test (p < 0.05). Results: The gap volume of all tested bulk-fill composites demonstrated that Group SF (1.581±0.773) had significantly higher values than Group EB (0.717±0.679). Regarding the use of a liner, a significant reduction in gap formation volume was observed only in Group SFL (0.927±0.630) compared with Group SF (1.581±0.773). Conclusion: It can be concluded that different types of bulk-fill composite resins affected gap formation volume. Low-viscosity bulk-fill composites exhibited better adaptation to cavity walls and less gap formation than did sonic-activated bulk-fill composites. The use of an RMGIC liner produced a significant reduction in gap formation volume for sonic-activated bulk-fill composites.


Asunto(s)
Humanos , Resinas Compuestas/química , Imagenología Tridimensional/métodos , Preparación de la Cavidad Dental/métodos , Materiales Dentales/química , Restauración Dental Permanente/métodos , Técnicas In Vitro , Ensayo de Materiales , Cementos de Resina , Análisis del Estrés Dental , Microtomografía por Rayos X , Polimerizacion
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