Resumen El objetivo del trabajo es analizar la implementación de dos de los programas estelares de la administración federal actual para el sector rural, con el enfoque del ciclo de las políticas públicas. De 2017 a 2019 se realizó un estudio en 24 comunidades de seis estados del país, los resultados reflejaron la dispersión de recursos en más de 100 programas; en las comunidades estudiadas, los beneficiarios solo recibían dos o tres de ellos. En el nuevo sexenio se ha percibido la falta de información precisa sobre el acceso a los programas, en la opinión pública no se percibe un diseño y planeación de políticas que impacten de manera concreta en el fomento productivo; se continúa y profundiza en políticas de transferencias y asistencia social. Se concluye que continúa un esquema similar al anterior gobierno en la definición, diseño e implementación de políticas públicas para el campo.

Abstract The objective focuses on analyzing the implementation of two public policies for the rural sector in the new federal public administration, under the focus of the public policy cycle. From 2017 to 2019 a study was carried out in 24 communities in six states of the country, the results reflected the dispersion of resources in more than 100 programs; in the communities studied, the beneficiaries only received two or three of them. In the new six-year period, the lack of precise information on access to programs has been perceived. Public opinion does not perceive a design and planning of policies that specifically impact productive promotion; it continues and deepens in transfer policies and social assistance. It ́s concluded that a similar scheme to the previous government continues in the definition, design and implementation of public policies for the field.

Objective To assess the influence of final irrigation protocols with chlorhexidine in the coronal leakage of Enterococcus faecalis in filled root canals. Material and Methods Seventy single-root canals from extracted teeth were prepared using ProTaper instruments. The irrigation protocol accomplished an alternating irrigation with 5 mL of 2.5% sodium hypochlorite (NaOCI) and 17% EDTA between each file. The teeth were randomly divided into four experimental groups (n=15) according to the final irrigation regimen: group 1, without final irrigation; group 2, irrigation with 10 mL 2.0% chlorhexidine (CHX); group 3, with a final application of EC40™; and group 4, irrigation with the combination (1:1) of 0.2% CHX + 0.1% cetrimide (CTR). All the teeth were mounted in a two-chamber apparatus and the coronal access was exposed to E. faecalis. The presence of turbidity in the BHI broth over a period of 180 days was observed. The Friedman test was used for statistical analysis. Results EC40™ varnish showed the least leakage at 180 days, and was statistically similar to 2% CHX. No significant differences were observed between the group without final irrigation and the 2% CHX group or 0.2% CHX + 0.1% CTR. Conclusions In this ex vivo study, EC40™ showed the longest delayed coronal leakage of E. faecalis, although without significant differences from 2% CHX.

Background. Bonding agents could be used as fissure sealants. This study compares the retention three fissure sealants (Delton®, Delton Plus® and Concise®) and a filled dentin bonding system (Optibond Solo®). Methods. Fifty-six children aged 7-8 years received fissure sealants either in the four permanent first molars, in the four deciduous second molars, or in all eight of these teeth. Every child received a different sealing material in each quadrant on a random basis. Clinical evaluation at 12 months was performed by a single blind examiner, and the retention was classified as either a success (total retention) or a failure (partial retention or not present). Results. There were no statistically significant differences among the four materials in permanent maxillary molars or deciduous molars. In permanent mandibular molars, Optibond Solo® showed a lower percentage of retention (40.9%), significantly different (p=0.002) to that of Delton® (89.5%), Delton Plus® (87.5%) and Concise® (76.5%). Conclusion. One bottle dentin bonding system used as a sealant does not improve the retention of conventional fissure sealants. Clinical Implication: Because of the scarcity of studies on the use of dental adhesives as sealants, further studies are warranted for the final support of that conclusion.