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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 8, 2024

🔍 Key Findings

  • All four techniques achieved TPA <14°, meeting the threshold for acceptable surgical correction in eTPA cases.
  • Group A (CBLO + CCWO) and Group D (PTNWO) showed highest accuracy in achieving target TPA values.
  • Group B (TPLO + CCWO) resulted in significant tibial shortening compared to other techniques.
  • Group A caused the greatest cranial mechanical axis shift, while Group B caused the least.
  • Group C (mCCWO) resulted in consistent under-correction of TPA, despite aiming for 0°.
  • Modified or neutral wedge osteotomies (Groups C and D) had minimal effect on tibial length, making them suitable when preservation is important.
  • All techniques involved mechanical axis shifts, highlighting the importance of preoperative planning to minimize morphologic disruption.
  • Supplemental fixation was standard for all procedures to reduce risks such as tibial tuberosity fracture and plateau leveling loss.

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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 8, 2024

🔍 Key Findings

  • All four techniques achieved TPA <14°, meeting the threshold for acceptable surgical correction in eTPA cases.
  • Group A (CBLO + CCWO) and Group D (PTNWO) showed highest accuracy in achieving target TPA values.
  • Group B (TPLO + CCWO) resulted in significant tibial shortening compared to other techniques.
  • Group A caused the greatest cranial mechanical axis shift, while Group B caused the least.
  • Group C (mCCWO) resulted in consistent under-correction of TPA, despite aiming for 0°.
  • Modified or neutral wedge osteotomies (Groups C and D) had minimal effect on tibial length, making them suitable when preservation is important.
  • All techniques involved mechanical axis shifts, highlighting the importance of preoperative planning to minimize morphologic disruption.
  • Supplemental fixation was standard for all procedures to reduce risks such as tibial tuberosity fracture and plateau leveling loss.

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Multiple Choice Questions on this study

In Story 2024 et al., on surgical correction of excessive tibial plateau angle (eTPA), which two techniques demonstrated the most accurate achievement of their target TPA values?

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

Answer: CBLO + CCWO and PTNWO

Explanation: Groups A and D had the least variation from their target TPAs, with mean correction accuracy near 1.0.
In Story 2024 et al., on surgical correction of excessive tibial plateau angle (eTPA), which procedure consistently under-corrected the tibial plateau angle despite a target TPA of 0°?

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

Answer: mCCWO

Explanation: Group C (mCCWO) aimed for 0° TPA but achieved a mean of 4.76°, reflecting consistent under-correction.
In Story 2024 et al., on surgical correction of excessive tibial plateau angle (eTPA), what was a key rationale for using neutral wedge osteotomies like PTNWO and mCCWO in dogs with eTPA?

A. They reduce implant costs
B. They eliminate the need for plates
C. They avoid mechanical axis shift
D. They minimize tibial length change
E. They achieve perfect TPA correction

Answer: They minimize tibial length change

Explanation: Both techniques preserved tibial length better than TPLO-based techniques, making them preferable when length preservation is critical.
In Story 2024 et al., on surgical correction of excessive tibial plateau angle (eTPA), which group showed significant tibial shortening compared to others?

A. CBLO + CCWO
B. TPLO + CCWO
C. mCCWO
D. PTNWO
E. None showed shortening

Answer: TPLO + CCWO

Explanation: Group B (TPLO + CCWO) was the only group that resulted in tibial shortening relative to baseline length.
In Story 2024 et al., on surgical correction of excessive tibial plateau angle (eTPA), which technique caused the greatest cranial mechanical axis shift?

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

Answer: CBLO + CCWO

Explanation: This combination produced the largest change in mechanical cranial distal tibial angle (mCrDTA), indicating the greatest axis shift.

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