RESUMEN
OBJECTIVES: To conduct a feasibility study on investigating the effectiveness of an alcohol-free essential oil mouthwash (AF-EOMW) to reduce plaque accumulation and oral pathogen levels in institutionalised elders receiving long-term care and to obtain preliminary results. BACKGROUND: Although simple, cost-effective strategies to improve oral hygiene in seniors such as the use of mouthwashes have been shown to reduce the risks of respiratory diseases, little information is available on the feasibility of implementing these measures. METHODS: Twenty-five elderly participants with significant loss of autonomy were initially recruited and divided into two groups. A test group rinsed with an AF-EOMW twice a day, and a control group rinsed with tap water. Data on demographic characteristics, dental history and tobacco use were collected from a questionnaire. Problems encountered during recruitment and data collection were documented. Plaque index, denture cleanliness and salivary levels of several pathogens were measured at three time points: baseline (T0 ), day 22 (T1 ) and day 45 (T2 ). RESULTS: Eighteen participants completed the study. Several problems were encountered during recruitment and execution of the study protocol. No significant differences in clinical or microbiological measures were found between the test group and controls at three time points (p > 0.05). CONCLUSION: This pilot study shows that, if sufficient logistical and financial resources are available, it is feasible to conduct randomised clinical trials in a seniors' facility. The use of an AF-EOMW to improve oral hygiene in seniors was not found to be superior to tap water. However, larger controlled clinical studies are needed to confirm these results.
Asunto(s)
Placa Dental/prevención & control , Cuidados a Largo Plazo/métodos , Antisépticos Bucales/química , Antisépticos Bucales/uso terapéutico , Aceites Volátiles/uso terapéutico , Anciano , Anciano de 80 o más Años , Antiinfecciosos Locales/uso terapéutico , Bacterias/clasificación , Bacterias/efectos de los fármacos , Canadá , Candida/efectos de los fármacos , Demografía , Placa Dental/microbiología , Índice de Placa Dental , Limpiadores de Dentadura , Dentaduras , Etanol , Estudios de Factibilidad , Femenino , Humanos , Masculino , Registros Médicos , Higiene Bucal , Proyectos Piloto , Saliva/microbiología , Encuestas y Cuestionarios , Uso de Tabaco , AguaRESUMEN
In this case report, we describe the successful long-term treatment of a patient with dental agenesis. The initial treatment plan included an orthodontic phase to provide adequate space for replacing missing lateral incisors with implants. However, because of some complications encountered after 2 years of orthodontic treatment, a revised treatment plan was considered to achieve functional and esthetic goals. The patient was completely satisfied 5 years after being treated with two 2-unit cantilevered resin-bonded fixed partial dentures supported by the cuspids. This conservative treatment plan was cost-effective without having any significant biological cost.
Asunto(s)
Anodoncia/terapia , Dentadura Parcial Fija con Resina Consolidada , Incisivo/anomalías , Diseño de Dentadura , Femenino , Humanos , Persona de Mediana Edad , Ortodoncia Correctiva/métodos , Preparación Protodóncica del Diente/métodosRESUMEN
With the increasingly commercial emphasis on dental esthetics, patients have become more interested in improving the appearance of their smile. For many, whiter teeth is their chief goal. However, when considering dental bleaching, practitioners need to take certain precautions. Over the past decade, multiple studies have evaluated the effects of bleaching agents on restorative materials. This article reviews their conclusions, focusing mainly on the clinical impact these agents can have on amalgam, porcelain, ormocer, glass ionomer, compomer and composite resin restorations.
Asunto(s)
Materiales Dentales/química , Restauración Dental Permanente , Oxidantes/química , Peróxidos/química , Blanqueamiento de Dientes/efectos adversos , Cerámica/química , Resinas Compuestas/química , Amalgama Dental/química , Porcelana Dental/química , Fracaso de la Restauración Dental , Cementos de Ionómero Vítreo/química , Dureza , Humanos , Cerámicas Modificadas Orgánicamente , Cementos de Resina/química , Silanos/química , Propiedades de SuperficieRESUMEN
O objetivo deste artigo é demonstrar a importância de uma visita ao dentista por alguém interessado em clareamento dental. Mais do que nunca, as pessoas estão ansiosas por dentes mais brancos. Desde o aparecimento dos produtos de clareamento auto-administrados no início dos anos 2000, nunca foi tão fácil ter acesso a tantos tipos diferentes de produtos. Embora o processo de clareamento pareça ser simples, ele é um procedimento odontológico que precisa de um exame dentário prévio por diversas razões. O dentista não apenas conduzirá exames dentários e periodontais, mas também perguntará ao paciente sobre seu estado de saúde, para ter certeza de que não há contra-indicações. Ele diagnosticará a possível causa do manchamento dental e será capaz de determinar a chance de sucesso, a duração e o custo do tratamento e explicar os possíveis efeitos colaterais. O paciente também pode se beneficiar da supervisão do dentista, se quaisquer complicações surgirem durante o tratamento de clareamento. Uma discussão de todos esses aspectos é apresentada neste artigo.
Asunto(s)
Humanos , Estética Dental , Pigmentación , Blanqueamiento de DientesRESUMEN
This study evaluated the surface finish of three direct resin composites polished with three different systems. Disk-shaped specimens (n=16 per material; phi=8.0 mm x h=2.0 mm) were formed in a stainless steel mold by packing uncured material, either a hybrid composite (Z250, 3M ESPE) or two micro-hybrid composites (Point 4, Kerr; Esthet-X, Dentsply), and light-cured from the top and the bottom surfaces with a light-emitting diode (LED) curing unit (NRG, Dentsply). After storing the specimens in deionized water at 37 degrees C for seven days, one side of each specimen was finished through 1200-grit SiC abrasive (Buehler). Five specimens of each resin composite were randomly assigned to one of the three polishing systems (Identoflex, Kerr; Pogo, Dentsply; Sof-Lex, 3M ESPE). Manufacturers' instructions were followed during the polishing procedures. The average surface roughness (Ra) was determined by generating tracings across the polished surface of each disk using a scanning profilometer (Surfanalyzer System 5000, Federal Products Co). The results were analyzed by Kruskal-Wallis and Mann and Whitney tests (p < or = 0.05). The smoothest surfaces were produced with the celluloid strip (control group) on all the resin composites tested. The aluminum oxide disks (Sof-Lex) produced a statistically equivalent surface finish (Ra) on the three resin composites. The lowest mean roughness values were recorded with diamond micropolisher disks (PoGo) on the hybrid composite (Z250). Overall, the two new polishing systems, Identoflex and PoGo, created a comparable surface finish to that produced by the Sof-Lex system on all three resin composites.
Asunto(s)
Resinas Compuestas , Pulido Dental , Óxido de Aluminio , Compuestos Inorgánicos de Carbono , Resinas Compuestas/química , Diamante , Distribución Aleatoria , Goma , Compuestos de Silicona , Estadísticas no Paramétricas , Propiedades de SuperficieRESUMEN
STATEMENT OF PROBLEM: intact, prepared, and restored human maxillary premolars. MATERIAL AND METHODS: Fifty intact, noncarious human maxillary premolars were divided into 5 groups of 10 and were mounted with their roots imbedded in autopolymerized acrylic. In the first group, the teeth were intact with no preparation. In the other 4 groups, Class II MOD preparations were made with a water-cooled high-speed hand piece. In 1 group, the cavity preparations were restored with bonded CAD/CAM ceramic inlays. In 2 groups, the preparations were restored with bonded CAD/CAM composite inlays (acid etched or air particle abraded). In the final group, the teeth were prepared but unrestored. Specimens were tested individually in a universal testing machine, in which a 4.82-mm-diameter steel sphere plunger was mounted in the crosshead moving at 0.5 mm/min. The plunger contacted the facial and lingual triangular ridges beyond the margins of the restorations. Peak load to fracture (N) was measured for each specimen. Means were calculated and analyzed with analysis of variance (P
Asunto(s)
Diente Premolar/fisiología , Recubrimiento Dental Adhesivo , Preparación de la Cavidad Dental , Incrustaciones , Fracturas de los Dientes/fisiopatología , Cerámica/química , Diseño Asistido por Computadora , Preparación de la Cavidad Dental/clasificación , Preparación de la Cavidad Dental/instrumentación , Análisis del Estrés Dental/instrumentación , Recubrimientos Dentinarios/química , Humanos , Modelos Lineales , Estrés MecánicoRESUMEN
OBJECTIVES: A potential problem with high-intensity lights might be failure of polymer chains to grow and cross-link in a desired fashion, thereby affecting the structure and properties of the polymers formed. The purpose of this study was to evaluate mechanical properties of resin composites polymerized using four different light-curing units. METHODS: A conventional quartz-tungsten-halogen (QTH) light, a soft-start light, an argon-ion laser, and a plasma-arc curing light were used to polymerize disk-shaped (9.0mm diameter x 1.0 mm high) and cylinder-shaped (4mm diameter x 8 mm high) specimens of a universal hybrid and a flowable hybrid composite. Biaxial flexure strength, fracture toughness, hardness, compressive strength, and diametral tensile strength were determined for each composite. RESULTS: The use of the plasma-arc curing light, a high-intensity light, resulted in significantly lower hardness for the universal hybrid composite compared with the hardness obtained using the conventional QTH and the soft-start units. Hardness was the only mechanical property that was adversely affected by the use of a high-intensity light. SIGNIFICANCE: High-intensity lights might affect some resin composite mechanical properties, but this effect cannot be generalized to all resin composites and all properties.
Asunto(s)
Resinas Compuestas/efectos de la radiación , Cementos de Resina/efectos de la radiación , Fuerza Compresiva/efectos de la radiación , Restauración Dental Permanente , Análisis del Estrés Dental , Halógenos , Dureza/efectos de la radiación , Rayos Láser , Luz , Ensayo de Materiales , Docilidad/efectos de la radiación , Resistencia a la Tracción/efectos de la radiación , XenónRESUMEN
PURPOSE: The purposes of this retrospective case series study were to evaluate safety issues and determine participants' perceptions of a nightguard vital bleaching (NGVB) technique approximately 10 years post-treatment (average, 118 mo; range, 108-144 mo). MATERIALS AND METHODS: The study sample included 30 (79%) of 38 participants who had completed a previous NGVB study using a 10% carbamide peroxide solution (Proxigel or Gly-Oxide) in a custom tray for 6 weeks. Participants were asked whether there had been any change in the shade of their teeth post-treatment and, if so, to quantify the change on a verbal scale. In addition, 19 participants had gingival index and tooth vitality evaluated clinically, external cervical root anatomy evaluated radiographically, and enamel surface changes evaluated microscopically. RESULTS: Thirty-five (92%) of the original 38 participants had successful lightening of their teeth. At approximately 10 years post-treatment (average, 118 mo; range, 108-144 mo), external cervical resorption was not diagnosed and gingival index and tooth vitality findings were considered within the normal expectations for the sample studied, suggesting minimal clinical post-NGVB side effects at approximately 10 years. Scanning electron microscopic observations did not reveal substantial differences between treated and nontreated surfaces. Color stability, as perceived by 43% of the participants, may last approximately 10 years (average, 118 mo; range, 108-144 mo) post-treatment. CLINICAL SIGNIFICANCE: Nightguard vital bleaching using 10% carbamide peroxide is safe and effective, with no noticeable side effects, at approximately 10 years (average, 118 mo; range, 108-144 mo) post-treatment. Color stability, as perceived by 43% of the participants, may last 108 to 144 months post-whitening.
Asunto(s)
Blanqueamiento de Dientes/métodos , Adulto , Anciano , Peróxido de Carbamida , Color , Esmalte Dental/patología , Prueba de la Pulpa Dental , Combinación de Medicamentos , Diseño de Equipo , Estudios de Seguimiento , Humanos , Microscopía Electrónica de Rastreo , Persona de Mediana Edad , Oxidantes/administración & dosificación , Oxidantes/uso terapéutico , Satisfacción del Paciente , Índice Periodontal , Peróxidos/administración & dosificación , Peróxidos/uso terapéutico , Radiografía , Técnicas de Réplica , Estudios Retrospectivos , Resorción Radicular/clasificación , Resorción Radicular/diagnóstico por imagen , Seguridad , Factores de Tiempo , Blanqueamiento de Dientes/instrumentación , Cuello del Diente/diagnóstico por imagen , Cuello del Diente/patología , Urea/administración & dosificación , Urea/análogos & derivados , Urea/uso terapéuticoRESUMEN
This in vitro study evaluated the wear resistance of resin composite polymerized using four different light-curing systems. For this, a well-defined cylindrical cavity preparation (4.0 mm in diameter x 3.0 mm in depth) was made in a ceramic block (n=4 per material/light condition). Uncured material, either a universal hybrid composite (Herculite XRV) or a flowable hybrid composite (Revolution Formula 2), was packed and light-cured from the top surface only with one of the four light-curing units: 1) a conventional quartz-tungsten-halogen light, 2) a soft-start light, 3) an argon-ion laser or 4) a plasma-arc curing light. After storing the specimens in deionized water at 37 degrees C for 24 hours, the excess cured material was ground through successive grits up to a final 1200-grit SiC abrasive. The specimens were placed in deionized water at 37 degrees C for an additional 24 hours. Wear simulation was performed using a four-station Leinfelder-type three-body wear device. A slurry of water and unplasticized polymethylmethacrylate beads, simulating an artificial food bolus, was placed on the surface of each resin-composite-restored ceramic block. The entire cycling procedure was carried out 400,000 times. Impressions of each resin composite surface were taken with polyvinylsiloxane and epoxy replicas were made. Wear analyses were conducted by generating tracings across the worn surface of epoxy replicas using profilometer scans. For the universal hybrid composite and the flowable hybrid composite, the lowest wear occurred in specimens that were cured using the conventional quartz-tungsten-halogen light, and the highest wear was detected on those specimens made using the argon-ion laser. For both resin composites, the mean wear for specimens cured using the argon-ion laser was significantly higher than that of the specimens cured with the three other lights, which were statistically similar.
Asunto(s)
Resinas Compuestas/química , Alisadura de la Restauración Dental , Luz , Análisis de Varianza , Argón , Compuestos Inorgánicos de Carbono , Cerámica/química , Resinas Compuestas/efectos de la radiación , Preparación de la Cavidad Dental/clasificación , Pulido Dental , Restauración Dental Permanente/clasificación , Humanos , Rayos Láser , Iluminación/instrumentación , Ensayo de Materiales , Polímeros/química , Polímeros/efectos de la radiación , Polimetil Metacrilato/química , Cuarzo , Cementos de Resina/química , Cementos de Resina/efectos de la radiación , Compuestos de Silicona , Estadística como Asunto , Propiedades de Superficie , Temperatura , Factores de Tiempo , Tungsteno , Agua/químicaRESUMEN
PURPOSE: To evaluate microleakage at enamel and dentin margins of two composite resins, using bulk and incremental placement techniques, "rebonding", and facial and lingual curing methods. MATERIALS AND METHODS: One hundred standardized Class V cavity preparations were made on the facial surface of extracted human premolars and were randomly assigned to 10 groups. Single Bond was used as the dentin/enamel adhesive. A heavily filled composite resin, Z250, and a microfill, Silux Plus, were inserted and polymerized using five different techniques: (1) incremental placement and facial curing; (2) incremental placement, facial curing and rebonding; (3) bulk placement and facial curing; (4) bulk placement, facial curing and rebonding; (5) incremental placement and lingual and facial curing. After the restorations were finished and polished, the margins of those in the rebonded groups were etched, rinsed, and dried. The adhesive resin, Single Bond, was applied at the composite resin-tooth interface and light-cured. All the specimens were thermocycled, stained with 1% methylene blue, sectioned, and evaluated for leakage (0-4 scale) by two examiners. RESULTS: Almost no leakage occurred at enamel margins. At the cementum margins, differences in microleakage related to restorative material or technique were not statistically significant. However, leakage at the cementum margins was significantly greater than at the enamel margins for both composite resin materials.