RESUMEN
The purpose of this systematic review was to evaluate clinical studies on the follow-up survival of implants inserted in the zygomatic bone for maxillary rehabilitation. A comprehensive search of studies published from 2000 to July 2012 and listed in the PubMed/MEDLINE, Embase, and Cochrane Library databases was performed in accordance with the PRISMA statement. Relevant studies were selected according to predetermined inclusion and exclusion criteria. The initial database search yielded 751 titles. After filtering, 313 abstracts were selected, culminating in 42 full text articles. Application of eligibility criteria led to the elimination of 17 articles. Hence 25 full-text articles were considered clinically relevant and were included. Calculations of the interval survival rates and cumulative survival rates of implants could be carried out on the data extracted from the final list of included studies for the different time intervals. These studies reported the insertion of a total of 1541 zygomatic implants and 33 implant failures. Failure generally occurred during the first year interval and was related to clinical complications, such as recurrent acute and chronic sinusitis. After a 36-month follow-up, the survival rate was 97.86%. Additional studies with longer follow-up periods, including the number of zygomatic implants inserted and details of the variations in the surgical techniques used and the impact of the maxillary morphology are still required.
Asunto(s)
Implantación Dental Endoósea/métodos , Implantes Dentales , Fracaso de la Restauración Dental , Arcada Edéntula/rehabilitación , Maxilar/cirugía , Procedimientos Quirúrgicos Preprotésicos Orales/métodos , Cigoma/cirugía , Prótesis Dental de Soporte Implantado , Humanos , Resultado del TratamientoRESUMEN
El presente trabajo evaluó el movimiento de los dientes artificiales en prótesis totales maxilares, sometidas a diversas presiones durante el prensado y el efecto de este en relación al material usado en la inclusión. Treinta y seis réplicas de prótesis totales previamente confeccionadas, fueran divididas en seis grupos: Los grupos G1,G2 y G3 fueron incluidos con yeso tipo III, a una presión de 800, 1.000 y 1.250 kgf respectivamente y los grupos S1, S2 y S3 fueron incluidos con una barrera de silicona y yeso, a una presión de 800, 1.000 y 1.250kgf, respectivamente. Las prótesis fueron medidas en puntos demarcados previamente en los segundos molares, premolares e incisivo central con el programa de computación gráfica (AutoCad 2000), después de cada etapa: encerado, polimerización y emuflado. La comparación entre estas dos fases permitió observar que: en los grupos (G1 y S1) donde se utilizó la menor presión (800 kgf) ocurrieron las mayores alteraciones en el posicionamiento de los dientes artificiales y que el grupo que mostró menores alteraciones fue cuando se utilizó 1.250 kgf de presión y la inclusión fue con yeso (AU)
The present study evaluated artificial teeth movement in complete dentures, submitted to different flasking loading and the effect of these loading pressures on the material used in the flasking procedure. Thirty-six dentures were fabricated and equally divided into six groups: Groups G1, G2 and G3 were processed with type III gypsum and 800, 1000 and 1250 kgf loading pressures, respectively, and groups S1, S2 and S3 were processed with silicone barrier and 800, 1000 and 1250 kgf loading pressures, respectively. In order to evaluate the artificial teeth movement, measurements were performed from previously determined points down in the second molars tips and in the second pre-molars cusps and in the central incisor. Those points were scanned (Scan Jet 6100C - Hewlett Packard) and then the measurements were performed and analyzed through the use of the AutoCad 2000 software, during the wax and the post-polymerization phases. The comparison between these two phases allowed the following observations: in groups (G1 and S1) where less loading pressure was used (800 kgf), the movements in the artificial teeth positions were the highest, and the group that presented the lowest changes was the one processed with type III gypsum and 1250 kgf loading pressure (AU)