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GENUTECH SURGICAL TECHNIQUE

GENUTECH SURGICAL TECHNIQUE
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GENUTECH SURGICAL TECHNIQUE

Product catalog summary
Surgical Approach: The procedure involves a central anterior incision with internal parapatellar arthrotomy and external dislocation of the patella. The incision extends from the middle third of the quadriceps tendon to the tibial tuberosity.
Surgical Sequence: The recommended order includes tibial cutting, femoral cutting, measurement of flexion and extension spaces, completion of femoral cuts, PS/NPS selection, intercondylar box cutting (if PS), placement of femoral testing prosthesis, preparation of tibial keel, patella action, verification with testing implants, and placement of the final prosthesis.
Tibial Time (I): Osteotomy can be performed using extramedullary or intramedullary guides. The tibial cutting template is attached to the extramedullary rod and secured to the tibia with headless pins, using a 3.2 mm drill bit beforehand.
Femoral Time: Initial perforation is done with an awl or Ø 9 mm drill. The intramedullary rod is introduced, and femoral size is measured with the knee at 90º. The front and back cutting mask is placed with the appropriate angle adaptor and external rotation system.
Key Recommendations: Use 1.3 mm thick saw blades for tibial cutting to avoid warping. Do not remove headless pins until distal and posterior femoral cuts are completed. Choose the lesser size if the sizing guide reads between two sizes.
Overview: This document provides detailed procedural instructions for knee replacement surgery, including specifications for masks and components, and step-by-step guidance on their application.
Femoral Component Installation: The external rotation system is set by inserting lugs into the lower orifices of the "A" mask. The intramedullary shaft is coupled to the femur using a varus-valgus adaptor. The "A" cutting mask is fixed to the bone with pins.
Cutting Procedures: Front and back cuts are performed with the "A" mask attached. The "B" mask is used for distal cuts, and the bevel cutting mask is secured for maximum distal support.
Tibial Component Preparation: The tibial tray is inserted and adjusted for proper rotation. Flexo-extension is performed to verify knee mobility and stability.
Patellar Component: Minimum bone thickness is recommended to avoid fracture risk. Osteophytes and synovial tissue are removed, and the patella is cut using resection clamps.
Notes and Cautions: Ensure proper attachment of masks to avoid interference with cutting tools. Adjustments may be necessary if excessive ligament tension is observed. Care should be taken to avoid fractures in sclerotic bone areas.
Prosthetic Implantation Procedure: The procedure focuses on the positioning and verification of femoral, tibial, and patellar components, emphasizing proper alignment and function before finalizing the implant.
Annexes:
  • Annex I: Alternative method for attaching the "A" cutting mask with a 3º external rotation.
  • Annex II: Guidance for making additional cuts if excessive ligament tension is observed.
  • Annex III: Instructions for clipping and extracting tibial inserts.
  • Annex IV: Use of patellar compression clamps for cementation and fixation.
  • Annex V: Details on various impactors used in the procedure.
Implants: A comprehensive list of available implants, including references for different sizes and types of femoral and tibial components.
Sections:
  • Tibial Instruments: Lists various tibial instruments with reference numbers and size specifications.
  • Trial Templates and Chisels: Includes trial tibial templates and keel chisels in multiple sizes.
  • Femoral Instruments: Details instruments used for femoral procedures, including trial components for both sides.
  • Patellar Instruments: Contains tools for patellar procedures and trial components.
  • Instrument Sets: Describes complete sets for femoral and patella-femoral procedures.
  • Trial Inserts: Lists NPS and PS tibial trial inserts in different sizes and thicknesses.
Key Information:
  • Specifications: Each instrument and component is detailed with a reference number and size.
  • Procedures: Outlines necessary tools for specific orthopedic procedures.
  • Recommendations: Emphasizes selecting the correct size and type of instrument or component for successful outcomes.
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Catalog excerpts

GENUTECH SURGICAL TECHNIQUE-1

Tecnica Quirurgica Surgical Technique Sistema total de rodilla primaria Genutech® Genutech® total primary knee system INSTRUMENTACION PARA CORTE FEMORAL REDUCIDO INSTRUMENTATION FOR REDUCED FEMORAL CUTTING

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GENUTECH SURGICAL TECHNIQUE-3

ABORDAJE QUIRURGICO / SURGICAL APPROACH 2 TECNICA QUIRURGICA /SURGICAL TECHNIQUE 2 1. TIEMPO TIBIAL (I) / TIBIAL TIME (I) 3 1.1 Nivel de reseccion / Resection level 4 1.2 Corte tibial/Tibial cutting 6 2. TIEMPO FEMORAL / FEMORAL TIME 8 2.1 Perforacion inicial / Initial perforation 8 2.2 Introduce ion varilla endomedular / Introduction of intramedullary rod 8 2.3 Medicion del tamano femoral / Measurement of femoral size 9 2.4 Colocacion de mascara de corte anteriory posterior/ Placing of front and back cutting mask 10 2.5 Cortes anteriory posterior/Front and back cuts 14 2.6 Colocacion de mascara...

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GENUTECH SURGICAL TECHNIQUE-4

ABORDAJE QUIRÚRGICO / Surgical approach Se emplea una incisión central anterior con artrotomía pararotuliana interna y luxación externa de la rótula que, en sentido proximal, se extiende hasta el tercio medio del tendón del cuádriceps y, distalmente, hasta la tuberosidad tibial. A front central incision is used, with internal parapatellar arthrotomy, and external dislocation of the patella which, in the proximal direction, extends up to the middle third of the quadriceps tendon, and distally, to the tibial tuberosity. SECUENCIA QUIRÚRGICA / Surgical sequence Tras el abordaje se aconseja el siguiente...

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GENUTECH SURGICAL TECHNIQUE-5

Set tibial. Bandejas superior e inferior Tibial set. Upper and lowe trays 1. TIEMPO TIBIAL (I) / TIBIAL TIME (I) El diseño permite realizar la osteotomía con la guía extramedular, endomedular o la asociación de ambas. La plantilla de corte tibial (izquierda o derecha) se instala sobre la varilla extramedular que, a su vez, distalmente aloja una pinza ajustable al tobillo. Si se va a utilizar la guía extramedular, en la zona proximal se ensambla una varilla corta auxiliar provista de dos espículas que se fijan en la zona de las espinas tibiales una vez se tiene decidida la posición de la varilla...

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GENUTECH SURGICAL TECHNIQUE-6

1.1 Nivel de resección / Resection level Se instala el palpador en el alojamiento de la guía de corte y, con el extremo corto del palpador “10”, buscaremos el apoyo en el plato menos afectado, fijando provisionalmente la guía de corte a este nivel. Tras esto, con el extremo largo “0” del palpador localizaremos la zona tibial más deprimida del plato más afectado, pudiendo entonces presentarse estas dos situaciones: • Que el extremo “0” no contacte, con lo que deberemos descender la guía de corte tibial hasta propiciar el contacto. A esta altura de guía de corte aseguramos realizar una resección...

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GENUTECH SURGICAL TECHNIQUE-7

Set tibial. Bandeja inferior Tibial set. Lower tray Para bloquear la guía de corte tibial sobre la varilla extramedular, apretaremos el tornillo de bloqueo ayudándonos del destornillador hexagonal de 2,5 mm. To lock the tibial cutting guide on the extramedullary rod, we will tighten the block screw, with the aid of the 2.5 mm hexagonal screwdriver. Bloqueo de guía de corte tibial Blocking tibial cutting guide Set tibial. Bandeja superior Tibial set. Upper tray Se fija la guía de corte a la tibia con cuatro pins sin cabeza que se introducen a través de los orificios más distales (la línea marcada...

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GENUTECH SURGICAL TECHNIQUE-8

1.2 Corte tibial / Tibial cutting Con la guía de corte sólidamente fijada a la tibia, se retira el sistema de guías endomedulares y/o extramedulares utilizado y se realiza la osteotomía de la zona epifisaria de la tibia. With the cutting guide firmly attached to the tibia, the intramedullary and/or extramedullary guide system is removed, and osteotomy of the tibia’s epiphyseal area is performed. Nota / Note: Se aconseja utilizar hojas de sierra de 1.3 mm de grosor. Una sierra de menor grosor puede combarse y producir cortes inadecuados. It is advised to use 1.3 mm thick saw blades. A saw which...

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GENUTECH SURGICAL TECHNIQUE-9

Set tibial. Bandeja inferior Tibial set. Lower tray Set femoral 1 corte reducido. Bandeja inferior Reduced cutting femoral set. Lower tray Plantilla tibial Tibial template Mango soporte plantilla Tibial template handle Varilla de alineación Alignment shaft Nota / Note: Se recomienda no retirar los cuatro pins sin cabeza hasta haber realizado los cortes distal y posterior del fémur ya que pueden ser de utilidad en caso de necesitar realizar un “recut” (ver Anexo 2). It is recommended not to remove the four headless pins until the distal and posterior femoral cuts have been carried out, since they...

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GENUTECH SURGICAL TECHNIQUE-10

2. TIEMPO FEMORAL / FEMORAL TIME Set femoral 1 corte reducido. Bandeja superior Reduced cutting femoral set 1. Upper tray 2.1 Perforación inicial / Initial perforation Con el punzón, o la fresa de Ø 9 mm, se perfora en el lugar escogido el punto de entrada. With the awl, or the Ø 9 mm drill, the entry point is perforated at the chosen place. 2.2 Introducción de la varilla endomedular / Introduction of the intramedullary rod Con la ayuda del mango en “T” de anclaje rápido, se introduce el eje endomedular a través de la perforación realizada anteriormente, dejando sin introducir una longitud suficiente...

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GENUTECH SURGICAL TECHNIQUE-11

Set femoral 1 corte reducido. Bandeja superior Reduced cutting femoral set 1. Upper tray 2.3 Medición del tamaño femoral / Measurement of femoral size Con la rodilla a 90º, se realiza la medición del tamaño femoral introduciendo el eje endomedular a través de la cánula del medidor femoral y desplazándolo hasta hacer contacto con los cóndilos distales del fémur. Esta posición, referenciada al eje endomedular, permite realizar una lectura del tamaño femoral sin errores debido a la colocación inadecuada del medidor. Se ajusta la profundidad del estilete palpador haciendo coincidir la lectura grabada...

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