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2.
Rev. esp. cir. ortop. traumatol. (Ed. impr.) ; 56(4): 267-273, jul.-ago. 2012.
Article in Spanish | IBECS | ID: ibc-100566

ABSTRACT

Objetivo. La técnica de reconstrucción anatómica del ligamento cruzado anterior (LCA) persigue, reproduciendo la orientación nativa de sus fibras, alcanzar una mejor estabilidad rotacional en la rodilla. El objetivo principal del presente trabajo es la evaluación cuantitativa intraoperatoria, mediante el uso del sistema de navegación de Orthopilot®, de la laxitud anteroposterior y rotacional de la rodilla antes y después de una ligamentoplastia anatómica. Material y método. Descripción de la técnica de navegación y estudio transversal sobre una cohorte de 20 pacientes intervenidos en nuestro centro por rotura primaria crónica del LCA desde enero de 2010 hasta mayo de 2011. Con la ayuda del navegador se definió la posición exacta de los túneles en base a referencias anatómicas intraarticulares y se realizaron pruebas de estabilidad, tanto en el plano sagital como en el axial. Resultados. Nuestra técnica de reconstrucción anatómica del LCA situó el túnel tibial a una distancia media de 16,8±4,92 mm del ligamento cruzado posterior y a un 44,1%±4,35% de la anchura total del platillo tibial. La distancia media del centro del túnel femoral a la cortical posterior del cóndilo lateral fue de 7,89±2,78 mm. Intraoperatoriamente y antes de la reconstrucción, los valores medios (±DE) de traslación anteroposterior, rotación interna y rotación externa de la tibia a 30° fueron de 15,5mm (±5,11); 19° (±3,62) y 19,65° (±3,26) respectivamente. Tras la reconstrucción dichos valores disminuyeron a 5,6mm (±1,72); 12,17° (±3,76) y 16,9° (±4,42). Conclusiones. El empleo de sistemas de navegación como apoyo al cirujano permite sistematizar la posición de los túneles óseos y estandarizar el procedimiento en relación a la reconstrucción deseada. La reconstrucción del LCA según la técnica descrita, mejora la estabilidad anteroposterior y rotacional monoplanar respecto al estado preoperatorio pudiendo restablecer los valores de laxitud a los considerados como fisiológicos acorde al conocimiento científico actual (AU)


Purpose. The anatomical anterior cruciate ligament (ACL) reconstruction attempts to, by reproducing the natural orientation of its fibres, achieve a better rotational stability of the knee. The aim of this paper is to quantify the anteroposterior and rotational laxity of the knee before and after an anatomic ligamentoplasty using the Orthopilot® navigation system as a supporting tool. Matherial and method. We describe the distinctive steps of Orthopilot® navigation as well as conducting a retrospective cross-sectional study on a cohort of 20 patients operated in our hospital for chronic primary ACL rupture from january 2010 to may 2011. The precise location of the tunnels was defined with the help of the navigator and the intra-articular landmarks and stability tests were performed in both the sagittal and axial planes. Results. In our technique for anatomical ACL reconstruction placed the tibial tunnel at a mean distance of 16.8±4.92mm from the posterior cruciate ligament in a position that represented 44.1%±4.35 of the total width of the tibial plateau. The average distance from the centre of the femoral tunnel to the posterior cortex of the lateral condyle was 7.89±2.78mm. Intra-operatively and before ACL reconstruction, the mean (±SD) anteroposterior movement, internal rotation and external rotation of the tibia at 30° position were 15.5mm (±5.11), 19° (±3.62) and 19.65° (±3.26), respectively. After reconstruction these values decreased to 5.6mm (±1.72°), 12.17° (±3.76) and 16.9° (±4.42), respectively. Conclusions. The use of navigation systems supporting the surgery allows the systematic positioning of bone tunnels and standardises the procedures for the desired reconstruction. ACL reconstruction using the technique described, improves the anteroposterior and rotational stability compared to preoperative status, to a stability state that could be considered physiological according to current scientific knowledge (AU)


Subject(s)
Humans , Male , Female , Joint Instability/surgery , Anterior Cruciate Ligament/surgery , Anterior Cruciate Ligament , Anterior Cruciate Ligament/injuries , Knee/physiopathology , Knee , Knee Injuries/surgery , Knee Injuries , Cohort Studies , Cross-Sectional Studies/methods , Cross-Sectional Studies/trends
3.
Rev Esp Cir Ortop Traumatol ; 56(4): 267-73, 2012.
Article in Spanish | MEDLINE | ID: mdl-23594844

ABSTRACT

PURPOSE: The anatomical anterior cruciate ligament (ACL) reconstruction attempts to, by reproducing the natural orientation of its fibres, achieve a better rotational stability of the knee. The aim of this paper is to quantify the anteroposterior and rotational laxity of the knee before and after an anatomic ligamentoplasty using the Orthopilot(®) navigation system as a supporting tool. MATHERIAL AND METHOD: We describe the distinctive steps of Orthopilot(®) navigation as well as conducting a retrospective cross-sectional study on a cohort of 20 patients operated in our hospital for chronic primary ACL rupture from january 2010 to may 2011. The precise location of the tunnels was defined with the help of the navigator and the intra-articular landmarks and stability tests were performed in both the sagittal and axial planes. RESULTS: In our technique for anatomical ACL reconstruction placed the tibial tunnel at a mean distance of 16.8±4.92 mm from the posterior cruciate ligament in a position that represented 44.1%±4.35 of the total width of the tibial plateau. The average distance from the centre of the femoral tunnel to the posterior cortex of the lateral condyle was 7.89±2.78 mm. Intra-operatively and before ACL reconstruction, the mean (±SD) anteroposterior movement, internal rotation and external rotation of the tibia at 30° position were 15.5 mm (±5.11), 19° (±3.62) and 19.65° (±3.26), respectively. After reconstruction these values decreased to 5.6 mm (±1.72°), 12.17° (±3.76) and 16.9° (±4.42), respectively. CONCLUSIONS: The use of navigation systems supporting the surgery allows the systematic positioning of bone tunnels and standardises the procedures for the desired reconstruction. ACL reconstruction using the technique described, improves the anteroposterior and rotational stability compared to preoperative status, to a stability state that could be considered physiological according to current scientific knowledge.


Subject(s)
Anterior Cruciate Ligament Injuries , Anterior Cruciate Ligament Reconstruction/methods , Joint Instability/etiology , Knee Injuries/surgery , Surgery, Computer-Assisted/methods , Adult , Anterior Cruciate Ligament/physiopathology , Anterior Cruciate Ligament/surgery , Anterior Cruciate Ligament Reconstruction/instrumentation , Cross-Sectional Studies , Female , Humans , Joint Instability/surgery , Knee Injuries/physiopathology , Knee Joint/physiopathology , Knee Joint/surgery , Male , Middle Aged , Retrospective Studies , Surgery, Computer-Assisted/instrumentation , Treatment Outcome
4.
Trauma (Majadahonda) ; 21(supl.1): 44-47, 2010. ilus
Article in Spanish | IBECS | ID: ibc-86006

ABSTRACT

El empleo de las nuevas tecnologías ha revolucionado todos los aspectos de la medicina y la cirugía ortopédica no es ajena al mismo. A través de esta exposición los autores analizan y destacan los aspectos más importantes en todos los ámbito de la especialidad: consulta, quirófano e investigación (AU)


The use of new technology has revolutionized all aspects of medicine and orthopedic surgery is not alien to it. Through this exhibition, the authors analyze and highlight the most important aspects in every field of the specialty: relationships, surgery and research (AU)


Subject(s)
Humans , Male , Female , Orthopedics/education , Orthopedics/organization & administration , Orthopedics/standards , Technology Assessment, Biomedical/organization & administration , Technology Assessment, Biomedical/statistics & numerical data , Technological Development/methods , Orthopedic Procedures/education , Orthopedic Procedures/trends , Traumatology/education , Traumatology/methods , Internet/trends , Internet
5.
Rev. esp. cir. ortop. traumatol. (Ed. impr.) ; 52(3): 161-165, mayo 2008. ilus, tab
Article in Es | IBECS | ID: ibc-67094

ABSTRACT

Objetivo. Analizar la localización del enclavado Gammalargo en la diáfisis femoral distal y valorar las posibles complicaciones derivadas de una mala relación biométrica entre implante y fémur.Material y método. Se realizó un estudio retrospectivo de69 enclavados tipo Gamma largo. Para evaluar la posicióndel extremo distal del clavo se diseñó un sistema de coordenadas en la diáfisis femoral distal y se midió la distancia a los ejes X e Y desde la punta anteroinferior del clavo.Resultados. Hubo 65 clavos (94,2%) colocados por delantede la teórica línea media de la diáfisis femoral. De ellos, 14 (20,2%) contactaban con la cortical anterior, y de éstos en 4 (5,7%) se sobrepasó la misma y hubo efecto pedestal. De los 42 clavos de menor longitud (340 mm), 16 (38%) resultaron excesivamente largos por localizarse distal a la metáfisis femoral. Hubo una pérdida posoperatoria de la función para la deambulación, aunque los resultados fueron, en general,muy satisfactorios.Conclusiones. Existía clara discordancia entre la biometría femoral y la longitud y curvatura del clavo Gamma largo en nuestra muestra, con alta incidencia de posición no deseada del implante, anteriorizándose e incluso rompiendo la cortical anterior. El clavo Gamma largo nos parece una osteosíntesis muy adecuada para las fracturas pertrocantéreas, subtrocantéreas y trocantereodiafisarias, pero sería deseable disponer de clavos más cortos y con un radio más adecuado a la morfología femoral de nuestra población (AU)


Purpose. To analyze the location of the long Gamma nail in the distal femoral shaft and to assess the possible complications derived from a poor biometric match between the implant and the femurMaterials and methods. Retrospective study of 69 longGamma nails. To evaluate the position of the distal tip of the implant, a system of coordinates was designed at the distal femoral shaft and the distance from anteroinferior tip of the nail to the X and Y axes measured.Results. Sixty-five nails (94.2%) were positioned ahead of the theoretical midline of the femoral shaft on the sagittal plane. Of these, 14 (20.2%) were in contact with the anterior cortex and 4 of these (5.7%) had impaled through the anterior cortex giving rise to the formation of a pedestal. Of the 42 shorter (340 mm) nails, 16 (38%) proved too long as they were located at the femoral metaphysis.Conclusions. There is a clear conflict between the femoral biometry of our population and the length and curvature of the long Gamma nail, with a high incidence of poor implant positioning; nails could adopt an excessively anterior position and even impale through the anterior cortex. We think that long Gamma nail osteosynthesis is appropriate for pertrochanteric,subtrochanteric and trochantero-diaphyseal fractures, although the availability of shorter nails with acurvature adapted to our population’s biometry would be desirable (AU)


Subject(s)
Humans , Bone Nails , Femoral Fractures/surgery , Fracture Fixation, Intramedullary/instrumentation , Biometry , Retrospective Studies
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