RESUMEN
In this clinical trial of nightguard vital bleaching for six weeks, 92 percent of the patients experienced some lightening of treated teeth. About 97 percent of patients with teeth stained through aging, inherent discoloration, brown fluorosis or trauma experienced lightening, as did 75 percent with tetracycline-stained teeth. Sixty-six percent experienced side effects, which resolved in 24 to 48 hours. Earliest re-treatment was done after one year in less time. Minimal color change occurred for 74 percent after 1 1/2 years and 62 percent after three years.
Asunto(s)
Peróxidos/uso terapéutico , Blanqueamiento de Dientes , Decoloración de Dientes/tratamiento farmacológico , Urea/análogos & derivados , Adulto , Peróxido de Carbamida , Sensibilidad de la Dentina/inducido químicamente , Combinación de Medicamentos , Fluorosis Dental/tratamiento farmacológico , Estudios de Seguimiento , Encía/efectos de los fármacos , Humanos , Satisfacción del Paciente , Peróxidos/efectos adversos , Encuestas y Cuestionarios , Tetraciclina/efectos adversos , Blanqueamiento de Dientes/efectos adversos , Decoloración de Dientes/etiología , Resultado del Tratamiento , Urea/efectos adversos , Urea/uso terapéuticoRESUMEN
This study evaluated the clinical performance of dentinal adhesives in seven various material/technique combinations. No statistically significant differences were observed among the restorative combinations, or among technique variables after two years in terms of retention, sensitivity or USPHS categories. However, other factors related to tooth flexure--such as occlusal stress, patient age, restorative material and restoration location--showed statistically significant associations with retention failures. These results support a tooth flexural theory of restoration retention.
Asunto(s)
Resinas Compuestas , Recubrimiento Dental Adhesivo , Restauración Dental Permanente , Análisis del Estrés Dental , Recubrimientos Dentinarios , Cementos de Resina , Grabado Ácido Dental , Adhesivos , Adulto , Factores de Edad , Anciano , Bisfenol A Glicidil Metacrilato , Cementación , Distribución de Chi-Cuadrado , Oclusión Dental , Elasticidad , Humanos , Persona de Mediana Edad , Distribución Aleatoria , Dióxido de Silicio , Resistencia a la TracciónRESUMEN
A study was conducted to determine whether the wear resistance of a posterior composite could be improved by maximizing filler particle-to-particle contacts. This was expected to reduce stress concentrations on the resin matrix and thus reduce occlusal wear. A self-curing quartz-filled composite with this design, P-10, was used to restore 90 Class I and II cavity preparations in adult teeth. Restorations were recalled after baseline at six months, one year, two years, and three years to measure wear by direct and indirect evaluation methods. There was no apparent advantage for this material compared with other previously evaluated posterior composites. The average cumulative wear for P-10 after three years was 145 microns. In addition, the restorations were evaluated for color-matching, interfacial staining, secondary caries, marginal adaptation, surface texture, and postoperative sensitivity. This material was not significantly different in those ways from other posterior composite products except in terms of more rapid color change, because it is self-cured.
Asunto(s)
Resinas Compuestas , Diente Premolar , Ensayos Clínicos como Asunto , Restauración Dental Permanente , Estudios de Seguimiento , Humanos , Diente Molar , Abrasión de los DientesRESUMEN
Recently, numerous resin systems claiming dentinal adhesive properties have been introduced. This study evaluated the clinical performance of two such adhesive resins in seven various material and technique combinations without conventional cavity-retention features. To identify potential risk factors in regard to retention, nonmaterial- and technique-related variables such as patient age and occlusion were also evaluated.