RESUMEN

COVID-19 es una enfermedad altamente contagiosa y potencialmente mortal que nos acompañara por largo tiempo. Las profesiones de la salud y la vida en general ha sido afectada de forma significativa en todo lugar del mundo. La odontología ha pasado de una etapa de gran desarrollo clínico a una etapa donde el manejo de barrera de protección, el control de tratamientos y el tiempo asignado a los pacientes cambiará la forma de realizar la profesión. El presente trabajo pretende resumir las indicaciones y recomendaciones basadas en la evidencia disponible y realizar un análisis de la condiciones de salud oral para Latinoamérica en esta época de pandemia.

COVID-19 is a profound, highly contagious and life-threatening viral disease that will be with us for a long time. Health Care-related professions and life in its entirety are significantly, and perhaps irreversibly affected, all around the World. COVID-19 is and will continue to transform Dentistry and its practise. Based on the available evidence accrued to date, this work attempts to address such changes, current and anticipated, as well as present recommendations for clinical practise implementation, tailored for Latin/South America, in light of such lifealtering momentous pandemic.

Asunto(s)

RESUMEN

OBJECTIVES: This study aimed to evaluate the stability of prosthetic screws from three types of craniofacial prostheses retention systems (bar-clip, ball/O-ring, and magnet) when submitted to mechanical cycling. MATERIALS AND METHODS: Twelve models of acrylic resin were used with implants placed 20 mm from each other and separated into three groups: (1) bar-clip (Sistema INP, São Paulo, Brazil), (2) ball/O-ring (Sistema INP), and (3) magnet (Metalmag, São Paulo, Brazil), with four samples in each group. Each sample underwent a mechanical cycling removal and insertion test (f=0.5 Hz) to determine the torque and the detorque values of the retention screws. A servo-hydraulic MTS machine (810-Flextest 40; MTS Systems, Eden Prairie, MN, USA) was used to perform the cycling with 2.5 mm and a displacement of 10 mm/s. The screws of the retention systems received an initial torque of 30 Ncm and the torque values required for loosening the screw values were obtained in three cycles (1,080, 2,160, and 3,240). The screws were retorqued to 30 Ncm before each new cycle. RESULTS: The sample was composed of 24 screws grouped as follows: bar-clip (n=8), ball/O-ring (n=8), and magnet (n=8). There were significant differences between the groups, with greater detorque values observed in the ball/O-ring group when compared to the bar-clip and magnet groups for the first cycle. However, the detorque value was greater in the bar-clip group for the second cycle. CONCLUSION: The results of this study indicate that all prosthetic screws will loosen slightly after an initial tightening torque, also the bar-clip retention system demonstrated greater loosening of the screws when compared with ball/O-ring and magnet retention systems.

RESUMEN

Este trabajo tiene como objetivo analizar topográficamente la superficie de implantes de titanio comer-cialmente puros. Fueron seleccionados ocho implantes de las siguientes fabricantes: Conexáo - Sistema de Próteses; Lifecore - Biomedical; AS Technology y S - Serson Internacional. Las muestras presentaban tratamiento de la superficies, a través de las técnicas de ataque acido (Conexáo) y plasma spray de titanio (Lifecore-Biomedical; AS Technology y S -Serson International), siendo divididas en cuatro grupos, conteniendo dos implantes del mismo lote de cada fabricante. Los análisis fueron realizados a través de microscopia electrónica de barredura (MEB). Los estudios a través de MEB revelaron la topografía rugosa de la superficie y la uniformidad de las áreas entre las roscas de los implantes. Se puede concluir que todas las muestras presentaron rugosidad en la superficie, con diferencias en la micromorfología entre todos los implantes.

The aim of this research is to analyze the pure titanium dental implant surface. An 8 implant device of Conexáo - Sistema de Próteses; Lifecore - Biomedical; AS Technology y S - Serson Internacional was selected. The simple presented surface treatment with acid attack or titanium plasma spray, being analyzed in 4 groups with two implants in each. Those analyzed were realized with a scanning electron microscope showing the topography and structure between different part of the implant. It was concluded that all implant systems show surface roughness with differences in the micro-morphology among all implant groups.

Asunto(s)