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Table 2 Median (range) characteristics of the TPLO group, tibial measurements, patellar height decreases and PLTc grades

From: Comparison of tibial anatomical-mechanical axis angles and patellar positions between tibial plateau levelling osteotomy (TPLO) and modified cranial closing wedge osteotomy (AMA-based CCWO) for the treatment of cranial cruciate ligament disease in large dogs with tibial plateau slopes greater than 30° and clinically normal Labradors retrievers

PLTtc grade

0–2

2–4

> 4

Number of dogs (%)

16 (40)

8 (20)

16 (40)

Age (years)

3.6 (0.8–8)

3 (1.1–8)

4.5 (1.5–13)

Weight (kg)

35 (20.6–64.8)

32 (21–42)

29.4 (21–34)

Sex (M(neut.)/F(spayed))

8/10 (9)

5 (1)/9 (9)

1/7 (7)

TPA (°)

31 (30–37)

31 (30–36)

31 (30–34)

AMA angle (°)

3.6 (1.86–6.16)

3.84 (2.05–5.58)

3.44 (0.77–6.78)

TLAS

−0.28 (−1.63–0.4)

− 0.3 (− 0.81–1.4)

−0.62 (− 0.01–1.1)

ISIpo

1.94 (1.7–2.33)

2 (1.73–2.14)

1.94 (1.62–2.39)

ISIcls-ISIpo

0.21 (0.05–0.47)

0.29 (0.1–0.49)

0.42 (0.19–0.6) *

  1. PLTtc Patellar ligament thickening at the level of the tibial crest, TPA Tibial plateau angle, AMA angle Angle between the AA and the MA, TLAS Tibial long axis shift, ISIpo Insall-Salvati index postoperatively, ISIcls Insall-Salvati index contralateral side. ISIcls–ISIpo represents the decrease in the distance between the distal pole of the patella and the tibial crest
  2. * P < 0.05 using a Mann-Whitney nonparametric comparison