RESUMEN
Tooth color is a determining factor in the fabrication of dental prostheses. The aim of the present study is to compare two measurement methods used in the field of dentistry: dental guides and spectrophotometry. A total of 2768 natural teeth were measured using the Vita Classical and Vita 3D-Master dental guides (Vita-Zahnfabrik, Bad Säckingen, Germany), as well as a Vita Easyshade Compact spectrophotometer (Vita-Zahnfabrik). The measurements were carried out by one operator under suitable illumination conditions at 5500 degrees Kelvin. The obtained results show that the measurements obtained with the Vita Classical dental guide classifies teeth into the A-B categories, while the spectrophotometer preferentially classifies teeth into the B-C categories. The correlation coefficients obtained with the dental guides ranged from -0.32 to -0.39 (p < 0.01), while those for the spectrophotometer ranged from -0.35 to -0.55 (p < 0.01). Therefore, we can conclude that the spectrophotometer is more reliable and reproducible in its measurements than the dental guides.
RESUMEN
We present the clinical course of a 9-year-old female patient with Bloch-Sulzberger syndrome and severe neurological deficit that met the major (classic cutaneous signs) and minor (dental anomalies and retinal pathology) diagnostic criteria of Landy and Donnai. Longitudinal multidisciplinary follow-up was carried out from birth to adulthood. Neurological involvement was assessed with electroencephalographic (EEG) and neuroimaging tests at different times during the patient's life. Cranio-maxillofacial involvement was evaluated using lateral skeletal facial and cephalometric analyses. The right and left facial widths were measured through frontal face analysis and using the vertical zygomatic-midline distance. Oral rehabilitation was performed through orthodontic treatment and major dental reconstruction using composite resins. This treatment aimed to improve the occlusion and masticatory function, relieve the transversal compression of the maxilla, and reconstruct the fractured teeth. We believe that, due to significant neurological and cognitive impairment, orthognathic surgery was not the best option for restoring function and improving oral health-related quality of life.
RESUMEN
La mayoría de los ortodoncistas utilizan para cementarbrackets una técnica convencional de grabado ácido sobre el esmalte con ácido ortofosfórico, sistemas autograbadores, etc. Sin embargo, los cementos de vidrio ionómero son una buena opción gracias a las ventajas que ofrecen, como la ausencia de descalcificaciones alrededor del bracket, el cementado es más rápido y fácil, no es necesario controlar estrictamente la humedad, no es necesario acondicionar previamente el sustrato y es más fácil remover los restos dejados tras el despegado del bracket. Sin embargo, las fuerzas de adhesión obtenidas son más bajas que aquellas obtenidas con resinas de composite (AU)
Most of orthodontists use the ordinary technique of etching the enamel with orthophosforic acid, autoetching systems etc. However, glass ionomer cements are a good option regarding the advantages they offer, like the absence of decalcification around brackets, easy and quick cementation, its not necessary to estrictly control humidity, its not necessary to prepare the substrate and its easier to remove the rest of cement once you retire brackets. However, adhesive forces are lower than with acrilic resins (AU)