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Story et al: Morphologic impact of four surgical techniques to correct excessive tibial plateau angle in dogs: A theoretical radiographic analysis
Veterinary Surgery 1, 2024

🔍 Key Findings

  • Population: 16 dogs (27 tibias), TPA >34°
  • Techniques analyzed:
    • Group A: CBLO + CCWO
    • Group B: TPLO + CCWO
    • Group C: mCCWO
    • Group D: PTNWO
  • Outcomes:
    • All groups achieved post-correction TPA < 14°.
    • Group A: Slight over-correction (mean TPA 10.47°); greatest mechanical axis shift.
    • Group B: Tibial shortening (~0.58%); least mechanical axis shift.
    • Group C: Lowest post-correction TPA (mean 4.76°); under-correction.
    • Group D: High accuracy, minimal shortening (mean 7.09° post).
  • Statistical Significance:
    • Significant differences in tibial length change and mCrDTA (mechanical axis shift) between groups (p <.05).
    • TPA correction accuracy: Group A (1.02), B (0.95), C (0.89), D (0.98).

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← Articles

Story et al: Morphologic impact of four surgical techniques to correct excessive tibial plateau angle in dogs: A theoretical radiographic analysis
Veterinary Surgery 1, 2024

🔍 Key Findings

  • Population: 16 dogs (27 tibias), TPA >34°
  • Techniques analyzed:
    • Group A: CBLO + CCWO
    • Group B: TPLO + CCWO
    • Group C: mCCWO
    • Group D: PTNWO
  • Outcomes:
    • All groups achieved post-correction TPA < 14°.
    • Group A: Slight over-correction (mean TPA 10.47°); greatest mechanical axis shift.
    • Group B: Tibial shortening (~0.58%); least mechanical axis shift.
    • Group C: Lowest post-correction TPA (mean 4.76°); under-correction.
    • Group D: High accuracy, minimal shortening (mean 7.09° post).
  • Statistical Significance:
    • Significant differences in tibial length change and mCrDTA (mechanical axis shift) between groups (p <.05).
    • TPA correction accuracy: Group A (1.02), B (0.95), C (0.89), D (0.98).

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Multiple Choice Questions on this study

In Story 2024 et al., on eTPA osteotomy comparison, which technique resulted in the **greatest mechanical axis shift**?

A. CBLO + CCWO
B. TPLO + CCWO
C. modified CCWO (mCCWO)
D. proximal tibial neutral wedge osteotomy (PTNWO)
E. standard TPLO

Answer: CBLO + CCWO

Explanation: Group A (CBLO + CCWO) caused the largest change in mechanical cranial distal tibial angle (mCrDTA), indicating the most mechanical axis shift.
In Story 2024 et al., on eTPA osteotomy comparison, which technique achieved the **lowest mean postoperative TPA**?

A. modified CCWO (mCCWO)
B. CBLO + CCWO
C. TPLO + CCWO
D. proximal tibial neutral wedge osteotomy (PTNWO)
E. standard TPLO

Answer: modified CCWO (mCCWO)

Explanation: Group C (mCCWO) had the lowest mean post-correction TPA at 4.76°, although it under-corrected relative to its target of 0°.
In Story 2024 et al., on eTPA osteotomy comparison, which two techniques showed the **highest accuracy** in TPA correction relative to their target?

A. CBLO + CCWO and PTNWO
B. TPLO + CCWO and mCCWO
C. CBLO + CCWO and mCCWO
D. PTNWO and TPLO + CCWO
E. TPLO + CCWO and standard TPLO

Answer: CBLO + CCWO and PTNWO

Explanation: Groups A and D had mean TPA accuracy scores closest to 1.00: 1.02 and 0.98 respectively, indicating high precision.
In Story 2024 et al., on eTPA osteotomy comparison, which group demonstrated **tibial shortening** as an outcome?

A. CBLO + CCWO
B. TPLO + CCWO
C. modified CCWO (mCCWO)
D. proximal tibial neutral wedge osteotomy (PTNWO)
E. none of the above

Answer: TPLO + CCWO

Explanation: Group B (TPLO + CCWO) was the only group associated with tibial shortening (−0.58% change in length).
In Story 2024 et al., on eTPA osteotomy comparison, what was the **minimum acceptable TPA** post-correction reported to yield good outcomes in dogs?

A. >18°
B. ≤14°
C. ≤10°
D. <20°
E. ≤6°

Answer: ≤14°

Explanation: A TPA ≤14° is cited as associated with superior outcomes in dogs with eTPA postoperatively.

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