TPLO vs TTA

Question 1

why is wire not a good tool for fixing CCL injuries?

Answer 1

wire cyclically loads and eventually breaks

Question 2

what technique did Slocum come up with in 1992-2000 and what is the technique’s basic goal?

Answer 2

cranial tibial wedge osteostomy

this technique cuts/flattens the tibial plateau and changes shear forces into compressive forces

Question 3

What are the general differences between TPLO and TTA?

Answer 3

TPLO moves the plateau to meet the forces; TPLO increases joint force, disrupts congruency, and has second-order effects (meniscal injury, etc.)

TTA moves the forces to meet the plateau and decreases joint force.

Question 4

T/F: the general rule of thumb if that is the tibial plateau angle is <25 degrees, do TTA. if it is >25 degrees, do a TPLO.

Answer 4

true

Question 5

T/F: TPLO procedure does NOT neutralize all the forces that the cranial cruciate ligament does

Answer 5

true

Question 6

What muscle does the TPLO surgery weaken?

Answer 6

popliteus.

The popliteus is an internal rotator, but is not strongly affected by extension as the other internal rotators are. The cranial cruciate ligament limits internal rotation, but the popliteus tensions cranial cruciate ligament and counters tibial thrust.
The TPLO weakens the popliteus.

Question 7

T/F: TPLO planning is more difficult than TTA

Answer 7

false – TTA planning is more difficult.

Question 8

T/F: the TPLO surgical technique has reliability, consistent straightforward surgical technique, and consistent outcomes.

Answer 8

true

Question 9

T/F: TTA is used for saggital and torsional plane correction

Answer 9

false — only sagittal plane. TPLO can do both.