Preoperative measuraments
Using digital radiography

  • Take the X-ray projection with the extended stifle
  • Use a radiographic reference (blue circle) to adjust for radiographic magnification
  • Measure the TPA (= Tibial Plateau Angle) 
  • In patients with high TPA it is better to use locked plates.
  • Measuring the advancement of the crest
  • Standard tibial plateau technique
  • Draw the line for the tibial plateau (1)
  • Draw the orthognal to (1) starting at the origin of the patellar tendon (PT) on the patella (2)
  • Measure the distance (3) between the insertion of the PT on the tibial tuberosity (TT) and (2)
  • Draw the position and direction of the osteotomy
  • Mark a point immediately cranial to the tubercle of Gerdi (1)
  • Measure the thickness of the tibial cranial cortex taking a point twice the length of the tibial crest starting from the TT (2)
  • Move the measurement (2) to the distal top of ​​the tibial crest.
  • Draw the circle (4) whose radius is the measure (2)
  • Draw the line joining the point (1) with the midpoint of the arc of circumference (4) superimposed on the tibia
  • Additional measures
  • Measure the distance between the ALL and the cranial point (1) at the Gerdi tubercle

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