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Peterson et al: Evaluation of a crescent saw guide for tibial plateau‐leveling osteotomy: An ex vivo study
Veterinary Surgery 3, 2022

🔍 Key Findings

  • Crescent guide use resulted in significantly less medial cortical damage (mean 3.8 mm²) than the radial saw guide (35.7 mm²) and standard jig (51.3 mm²) in bone models.
  • No significant difference in osteotomy accuracy (distance of eccentricity, coronal or axial angulation) among crescent guide, radial guide, or standard jig in either bone models or cadavers.
  • Device application time was shortest with the crescent guide and longest for the radial saw guide.
  • Osteotomy time was fastest with the crescent guide compared to the radial saw guide (P = .015).
  • Participants rated the crescent guide easier to apply than both the radial saw guide (P < .005) and the standard jig (P = .015).
  • 5 of 6 novice participants preferred the crescent guide over the other devices for performing TPLO.
  • Subjective ease of osteotomy performance was higher with the crescent guide vs. radial guide (P < .001).
  • Crescent guide does not assist in fragment stabilization or plateau rotation unlike a standard TPLO jig.

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← Articles

Peterson et al: Evaluation of a crescent saw guide for tibial plateau‐leveling osteotomy: An ex vivo study
Veterinary Surgery 3, 2022

🔍 Key Findings

  • Crescent guide use resulted in significantly less medial cortical damage (mean 3.8 mm²) than the radial saw guide (35.7 mm²) and standard jig (51.3 mm²) in bone models.
  • No significant difference in osteotomy accuracy (distance of eccentricity, coronal or axial angulation) among crescent guide, radial guide, or standard jig in either bone models or cadavers.
  • Device application time was shortest with the crescent guide and longest for the radial saw guide.
  • Osteotomy time was fastest with the crescent guide compared to the radial saw guide (P = .015).
  • Participants rated the crescent guide easier to apply than both the radial saw guide (P < .005) and the standard jig (P = .015).
  • 5 of 6 novice participants preferred the crescent guide over the other devices for performing TPLO.
  • Subjective ease of osteotomy performance was higher with the crescent guide vs. radial guide (P < .001).
  • Crescent guide does not assist in fragment stabilization or plateau rotation unlike a standard TPLO jig.

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Multiple Choice Questions on this study

In Peterson 2022 et al., on crescent guide in TPLO, what was the primary benefit observed in novice surgeons using the crescent guide over other devices?

A. Improved osteotomy angulation
B. Improved distance of eccentricity (DOE)
C. Shorter time to perform plateau rotation
D. Reduced medial cortical damage
E. Increased tibial alignment precision

Answer: Reduced medial cortical damage

Explanation: Use of the crescent guide resulted in significantly less medial cortical damage compared to the radial guide and standard jig.
In Peterson 2022 et al., on crescent guide in TPLO, what is a noted **limitation** of the crescent guide compared to a standard TPLO jig?

A. It cannot stabilize the saw blade
B. It does not reduce cortical damage
C. It cannot be used in left tibiae
D. It does not aid in fragment stabilization or rotation
E. It requires more time to apply

Answer: It does not aid in fragment stabilization or rotation

Explanation: Unlike a TPLO jig, the crescent guide does not provide fragment stability or assist with plateau rotation.
In Peterson 2022 et al., on crescent guide in TPLO, which device took the longest time to apply in bone models?

A. Crescent guide
B. Standard jig
C. Radial saw guide
D. None – all equal
E. Tibial fixator

Answer: Radial saw guide

Explanation: The radial saw guide took the longest to apply (median 243s), while the crescent guide was the fastest (median 111s).
In Peterson 2022 et al., on crescent guide in TPLO, what was the outcome of comparing osteotomy accuracy among the three devices?

A. Crescent guide showed superior accuracy in all planes
B. Standard jig outperformed radial guide in coronal angulation
C. No significant differences in accuracy were found
D. Accuracy was best with the radial guide
E. Crescent guide showed worst accuracy

Answer: No significant differences in accuracy were found

Explanation: There were no significant differences in DOE, coronal angulation, or axial angulation among the devices in both bone models and cadavers.
In Peterson 2022 et al., on crescent guide in TPLO, how did participants perceive the crescent guide compared to the standard jig and radial guide?

A. No preference was shown
B. Preferred the radial guide
C. Preferred standard jig for ease
D. Most preferred the crescent guide
E. Perceived no differences

Answer: Most preferred the crescent guide

Explanation: 5 of 6 novice participants preferred the crescent guide method over both the radial saw guide and standard jig.

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