TPLO Planning Guides

8 guides on TPLO surgery and planning, from the tibial plateau angle to plate templating, illustrated with real osAlign screenshots.

A completed osAlign TPLO plan showing calibrated measurements, the functional axis, a 3.5 degree post-rotation plateau angle, the osteotomy, and a plate overlay

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How to Plan a TPLO: Step-by-Step Preoperative Planning

Step-by-step TPLO preoperative planning: radiograph, calibration, TPA landmarks, saw blade and osteotomy, rotation distance, plate templating, and export.

All guides

Post-operative lateral radiograph of a canine stifle after TPLO, with the rotated proximal tibia fixed by a locking plate and screws

What is TPLO surgery?

How TPLO surgery works: cranial cruciate ligament disease, tibial thrust, the tibial plateau angle, the osteotomy and plate, recovery, and complications.

Close-up of a canine stifle radiograph in osAlign with the plateau line, the functional axis, the 90 degree perpendicular, and a tibial plateau angle of 33.1 degrees

Tibial plateau angle (TPA)

What the tibial plateau angle is, the four landmarks used to measure it, typical TPA values in dogs, target post-op TPA, and sources of measurement error.

Close-up of an osAlign TPLO plan showing measurements of 39.95 millimeters and 79.98 millimeters and a leveled plateau angle of 3.5 degrees

Planning to 0.1 mm precision

How to plan a TPLO to 0.1 mm: calibration, landmark geometry, true-size saw cuts, live rotation with arc length, plate templates, and what limits accuracy.

The osAlign landmarks panel with an Auto-Detect Landmarks button above the four TPA landmarks on a lateral tibia radiograph

AI in TPLO planning

Can AI plan a TPLO? What automated landmark detection and TPA measurement achieve today, what the research shows, and why surgeon verification still matters.

Close-up of an osAlign saw cut circle with a 24 millimeter radius and 54.0 millimeter arc over a canine proximal tibia with TPA 33.1 degrees

TPLO rotation and saw blade selection

How to choose a TPLO saw blade radius, position the osteotomy, and calculate rotation distance, with the formula, a worked example, and a rotation table.

osAlign calibration panel with a 10 millimeter line drawn across the notches of a radiographic calibration marker

Radiograph positioning and calibration

How to position and calibrate radiographs for TPLO planning: the true lateral view, calibration markers, magnification, and the limits of DICOM pixel spacing.

The osAlign plate overlay panel with an InVictos Elevation TPLO plate, size 3.5 small, right side, rotated 11 degrees on the proximal tibia

Choosing and templating a TPLO plate

How to choose and template a TPLO plate before surgery: proximal segment fit, screw position, joint and osteotomy clearance, and true-size digital templates.

For educational and planning support only. Surgeon judgment governs all clinical decisions.