Search results for " Surgery."

Positive effect of platelet rich fibrin on osseointegration

2016

Background Leukocyte-platelet rich fibrin (L-PRF) is a second generation platelet concentrate clinically used to accelerate tissue healing and bone regeneration. Achieving reduced implant osseointegration time could provide immediate or early loading of implants. The aim of this study was to evaluate the L-PRF-induced osseointegration and bone-implant contact (BIC) in an experimental animal model. Material and Methods Twelve 4-month-old New Zealand white rabbits were used. Following general anesthesia, 3-5 mL of blood was obtained from the central artery in rabbit ear and L-PRF was prepared. Two implant cavities (5 mm long and 3 mm in diameter) were created in each tibia with a total of fou…

In vitro comparison of primary stability of two implant designs in D3 bone

2016

Background Primary stability (PS) is a key factor for implant survival rate and depends on implant design or bone quality. The aim of this study was to compare different thread designs implants, evaluating PS with periotest values (PV) and implant stability quotient (ISQ) values through resonance frequency analysis (RFA). Material and Methods A total of 60 implants (Radhex®, Inmet-Garnick S.A., Guadalajara, Spain) were placed in freshly bovine ribs in vitro. Two designs were used: 30 tapered body with single thread design (PHI) and 30 tapered body with double thread design implants (PHIA). Both designs were 4mm wide and 12mm long. Implants were placed according to manufacturer’s guidelines.…

Influence of short implants geometry on primary stability.

2018

Background A correct design is needed in short implants to improve primary stability (PS) in low quality bone. This study aimed to compare PS of double thread and single thread short implants. Material and Methods Thirty implants with single thread design (PHI/SHORT-I) and 30 implants with double thread design (PHIA/SHORT-I) (Radhex®, Inmet-Garnick S.A., Guadalajara, Spain) were placed in 30 randomly selected bovine ribs. PS was assessed in implant stability quotients (ISQ) and periotest values (PV) with Osstell™ and Periotest® devices, respectively. Computed tomographies of the ribs were taken and bone quality was evaluated in Hounsfield Units (HU) using Ez3D Plus software (Vatech Co., Kor…

Dynamic Response of a Rigital Displacement Motor Operating with Various Displacement Strategies

2019

Digital displacement technology has the potential of revolutionizing the performance of hydraulic piston pumps and motors. Instead of connecting each cylinder chamber to high and low pressure in conjunction with the shaft position, two electrically-controlled on/off valves are connected to each chamber. This allows for individual cylinder chamber control. Variable displacement can be achieved by using different displacement strategies, like for example the full stroke, partial stroke, or sequential partial stroke displacement strategy. Each displacement strategy has its transient and steady-state characteristics. This paper provides a detailed simulation analysis of the transient and steady…

Reconstruction faciale complexe sur mesure : un cas de remplacement total de l’articulation temporo-mandibulaire, de l’arcade zygomatique et du zygoma

2017

Resume Introduction Le remplacement total prothetique de l’articulation temporo-mandibulaire (ATM) est devenu une intervention courante, mais ce remplacement prothetique se cantonne habituellement a l’ATM. Nous presentons le cas d’une reconstruction prothetique complexe sur mesure etendue l’articulation et les structures osseuses voisines. Observation Un patient de 57 ans, multi-opere pour une dysplasie fibreuse crânio-faciale droite, presentait une recidive d’ankylose de l’ATM droite et une perte de substance osseuse latero-faciale droite complexe. Nous sommes intervenus pour proceder a une reconstruction incluant l’ATM, l’arcade zygomatique et le zygoma a l’aide d’une prothese sur mesure …

Reply to Saqibet al.

2016

Resultados quirúrgicos estándar tras resección oncológica de colon. Creación de un nomograma para la autoevaluación

2017

Resumen Introduccion Existe un gran interes en los ultimos anos en identificar estandares de calidad en las distintas enfermedades, entre ellas, el cancer de colon debido a su alta prevalencia. El objetivo del presente estudio es definir unos valores estandar de calidad en los resultados de la cirugia del cancer de colon. Metodos Se han utilizado los datos del estudio prospectivo multicentrico nacional «ANACO», que incluye pacientes con cancer de colon intervenidos en 52 hospitales espanoles (2011-2012). Para el presente analisis se han excluido los centros con menos de 30 pacientes y han quedado finalmente 42 hospitales (2.975 pacientes). Se presentan los valores de 4 indicadores de calida…

Preparación preoperatoria de la hernia con pérdida de domicilio. Neumoperitoneo progresivo y toxina botulínica tipo A

2017

Resumen El neumoperitoneo progresivo preoperatorio y la toxina botulinica tipo A son herramientas utiles en la preparacion de los pacientes con hernias gigantes que han perdido el domicilio. Ambos procedimientos son armas complementarias del procedimiento quirurgico, especialmente con el uso de tecnicas protesicas sin tension, que permiten el manejo integral de estos pacientes. Este articulo tiene por objeto actualizar conceptos relacionados con ambos procedimientos, incidiendo en las ventajas que aportan en el manejo preoperatorio de las hernias gigantes que han perdido el domicilio.

Estándares de calidad en la cirugía oncológica pancreática en España

2018

Resumen Introduccion Identificar los estandares de calidad en la cirugia oncologica es un reto complejo necesario para poder mejorar los resultados quirurgicos. A diferencia de lo que ocurre en otros tumores, no existen unos estandares de calidad bien definidos en el cancer de pancreas. El objetivo es identificar los indicadores de calidad en la cirugia pancreatica oncologica en Espana, asi como sus limites de variabilidad. Metodos Los indicadores de calidad se han seleccionado a partir de las guias de practica clinica, conferencias de consenso, revisiones y publicaciones de ambito nacional sobre cirugia pancreatica oncologica entre los anos 2000-2016. Los margenes de variabilidad para cada…

Leucocyte Rheology at Baseline and after Activation in Post-Phlebitic Syndrome

1999

Objective: To evaluate leucocyte rheology, expressed as leucocyte filtration, polymorphonuclear leucocyte (PMN) membrane fluidity and cytosolic Ca2+ concentration in subjects with post-phlebitic leg syndrome (PPS). Methods: In 22 subjects with PPS we determined leucocyte filtration [unfractionated, mononuclear (MN) and PMN cells], employing the St George Filtrometer, PMN membrane fluidity using the fluorescent probe 1-[4-(trimethylamino)phenyl]-6-phenyl-1,3,5-hexatriene (TMA-DPH) and PMN cytosolic Ca2+ concentration using the fluorescent probe Fura 2-AM. Subsequently we determined the same PMN parameters after in vitro activation with 4-phorbol 12-myristate 13-acetate (PMA) and N-formyl-met…