Quiz Question

In Kang 2024 et al., on sacroiliac fixation strength, which construct had significantly higher maximum failure load under rotational force testing?

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Correct. Double HCS provided significantly higher failure load vs single lag screw fixation
Incorrect. The correct answer is Double 2.3-mm headless cannulated screws.
Double HCS provided significantly higher failure load vs single lag screw fixation

šŸ” Key Findings Summary

  • 20 cats with pelvic fractures treated using locking plates with only cortical screws
  • 28 fractures stabilized (ilium: 17, acetabulum: 6, ischium: 3, pubis: 2)
  • Implants: Primarily 1.5/2.0 mm LCPs or String-of-Pearls plates
  • Major complications in 2/20 cases (10%): sciatic entrapment, malunion requiring THA
  • Minor complications in 2/20 cases (10%): plate impingement, transient lameness
  • Clinical union in all cats by 8 weeks; all cats returned to full function
  • Authors conclude cortical screws alone can provide adequate fixation in feline pelvic fractures if screw purchase and bone quality are sufficient

Kang

Veterinary and Comparative Orthopedics and Traumatology

1

2024

Biomechanical Comparison of Double 2.3-mm Headless Cannulated Self-Compression Screws and Single 3.5-mm Cortical Screw in Lag Fashion in a Canine Sacroiliac Luxation Model

2024-1-VCOT-kang-1

Article Title: Biomechanical Comparison of Double 2.3-mm Headless Cannulated Self-Compression Screws and Single 3.5-mm Cortical Screw in Lag Fashion in a Canine Sacroiliac Luxation Model

Journal: Veterinary and Comparative Orthopedics and Traumatology

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In Deveci 2025 et al., on 3D drill guides, what was the median grade of sacral canal wall cortical breach?

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Correct. All screws had cortical breaches ≤ grade 2, but the median breach grade was 0 (IQR 0–1).
Incorrect. The correct answer is 0.
All screws had cortical breaches ≤ grade 2, but the median breach grade was 0 (IQR 0–1).

šŸ” Key Findings

  • Objective: Evaluate feasibility and accuracy of 3D-printed patient-specific drill guides for iliosacral screw placement in cadaver dogs.
  • N = 10 canine cadavers (20 hemipelves); screw placement done using fluoroscopic-assisted patient-specific guides (PSG).
  • Median cortical breach grade: 0 (IQR 0–1) for all screws.
    19/20 screws breached sacral canal wall (all ≤ grade 2), but no screws breached canal contents (grade 3).
  • Median trajectory deviation: 0.88° transverse, 0.72° dorsal.
  • Procedure time: Median 7.2 minutes for guide placement and drilling.
  • Conclusions: PSG-assisted screw placement was safe, accurate, and fast, offering clinical potential in pelvic trauma.

Deveci

Veterinary Surgery

2

2025

Evaluation of 3D‐printed patient‐specific guides to facilitate fluoroscopic‐assisted iliosacral screw placement in dogs

2025-2-VS-deveci-1

Article Title: Evaluation of 3D‐printed patient‐specific guides to facilitate fluoroscopic‐assisted iliosacral screw placement in dogs

Journal: Veterinary Surgery

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In Guevara 2024 et al., on implant placement accuracy, which surgeon had significantly higher odds of success?

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Correct. Surgeon 2, who also designed the guides, had the highest odds (OR = 9.61, p = .001).
Incorrect. The correct answer is Surgeon 2.
Surgeon 2, who also designed the guides, had the highest odds (OR = 9.61, p = .001).

šŸ” Key Findings:

  • Sample: 24 canine cadavers, 477 total pins across 240 vertebrae.
  • Technique Comparison: 3D printed guides (3DPG) vs freehand (FH).
  • Acceptable Placement Rates: 3DPG = 87.5%, FH = 69.8% (p < .0001).
  • Odds Ratio for FH: 0.28 (95% CI 0.16–0.47), significantly less likely to yield acceptable placement.
  • Worst Accuracy Locations: T10 (OR 0.10), T11 (OR 0.35).
  • Surgeon Impact: Surgeon 2 outperformed others (OR 9.61, p = .001).
  • Modified Zdichavsky Classification used to score implant accuracy (Grades I–IIIb).
  • Primary Benefit of 3DPG: Increased safety and precision, regardless of surgeon experience.

Guevara

Veterinary Surgery

2

2024

Ex vivo comparison of pin placement with patient-specific drill guides or freehand technique in canine cadaveric spines

2024-2-VS-guevara-5

Article Title: Ex vivo comparison of pin placement with patient-specific drill guides or freehand technique in canine cadaveric spines

Journal: Veterinary Surgery

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In Guevara 2024 et al., on implant placement accuracy, what was considered an acceptable placement grade using the modified Zdichavsky classification?

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Correct. Grades I and IIa were deemed acceptable; grades IIb, IIIa, and IIIb were unacceptable.
Incorrect. The correct answer is I and IIa.
Grades I and IIa were deemed acceptable; grades IIb, IIIa, and IIIb were unacceptable.

šŸ” Key Findings:

  • Sample: 24 canine cadavers, 477 total pins across 240 vertebrae.
  • Technique Comparison: 3D printed guides (3DPG) vs freehand (FH).
  • Acceptable Placement Rates: 3DPG = 87.5%, FH = 69.8% (p < .0001).
  • Odds Ratio for FH: 0.28 (95% CI 0.16–0.47), significantly less likely to yield acceptable placement.
  • Worst Accuracy Locations: T10 (OR 0.10), T11 (OR 0.35).
  • Surgeon Impact: Surgeon 2 outperformed others (OR 9.61, p = .001).
  • Modified Zdichavsky Classification used to score implant accuracy (Grades I–IIIb).
  • Primary Benefit of 3DPG: Increased safety and precision, regardless of surgeon experience.

Guevara

Veterinary Surgery

2

2024

Ex vivo comparison of pin placement with patient-specific drill guides or freehand technique in canine cadaveric spines

2024-2-VS-guevara-4

Article Title: Ex vivo comparison of pin placement with patient-specific drill guides or freehand technique in canine cadaveric spines

Journal: Veterinary Surgery

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In Violini 2024 et al., on 3D-guided spinal stabilization in brachycephalic dogs, what clinical finding was reported in 7 of 10 mid-term cases despite all being ambulatory?

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Correct. Most owners reported residual abnormal gait (scuffing, wide stance) despite ambulatory status:contentReference[oaicite:3]{index=3}.
Incorrect. The correct answer is Abnormal gait.
Most owners reported residual abnormal gait (scuffing, wide stance) despite ambulatory status:contentReference[oaicite:3]{index=3}.

šŸ” Key Findings

  • Spinal stabilization with 3D-printed patient-specific drill guides (3D-PSGs) was safe, with no immediate perioperative complications reported.
  • 84% of pedicle screws were optimally placed, and only 0.5% breached the spinal canal, reflecting high placement accuracy.
  • 80% of dogs experienced no neurologic deterioration postoperatively, indicating reliable short-term safety.
  • 3D-PSGs were accurate and reproducible, even across multiple institutions and surgeons.
  • Mid-term outcomes were favorable: all dogs were ambulatory, and 90% had static or improved neurologic signs.
  • 7 of 10 mid-term follow-ups showed abnormal gait, though owners rated lifestyle ≄3/5, suggesting acceptable function.
  • 3D-printed guides enabled precise pedicle screw placement in deformed vertebrae, expanding options in small breeds.
  • One dog suffered a T4 spinous process fracture due to overextension of PMMA cement, emphasizing the need for cement placement caution.

Violini

Veterinary Surgery

4

2024

Clinical outcomes of 20 brachycephalic dogs with thoracolumbar spinal deformities causing neurological signs treated with spinal stabilization using 3D-printed patient-specific drill guides

2024-4-VS-violini-4

Article Title: Clinical outcomes of 20 brachycephalic dogs with thoracolumbar spinal deformities causing neurological signs treated with spinal stabilization using 3D-printed patient-specific drill guides

Journal: Veterinary Surgery

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In Nicolas 2024 et al., what was a key advantage of the lateral scapular osteotomy approach versus dorsal or ventral routes?

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Correct. The approach offered good foramen access while preserving articular facets and minimizing spinal disruption:contentReference[oaicite:3]{index=3}
Incorrect. The correct answer is Avoided thoracic entry and preserved vertebral stability.
The approach offered good foramen access while preserving articular facets and minimizing spinal disruption:contentReference[oaicite:3]{index=3}

šŸ” Key Findings Summary

  • The lateral approach via scapular osteotomy allowed safe access to the T1-2 foramen in a French Bulldog with foraminal disc extrusion.
  • A mini-hemilaminectomy was performed, preserving articular facets.
  • The dog had no neurologic deficits postoperatively, returned to ambulation within 24 hours, and was discharged in 3 days.
  • At 10 months, CT confirmed excellent scapular healing and no recurrence.
  • Double 2.4-mm locking plates provided stable fixation across the scapular spine.
  • The technique avoided thoracic entry or dorsal spine dissection, suggesting a less invasive alternative for select T1-2 foraminal cases.

Nicolas

Veterinary and Comparative Orthopedics and Traumatology

2

2024

Scapular Osteotomy for Lateral Access to a T1-2 Foraminal Disc Extrusion, Treated by Mini-Hemilaminectomy in a Dog

2024-2-VCOT-nicolas-4

Article Title: Scapular Osteotomy for Lateral Access to a T1-2 Foraminal Disc Extrusion, Treated by Mini-Hemilaminectomy in a Dog

Journal: Veterinary and Comparative Orthopedics and Traumatology

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In Scott 2025 et al., on acetabular cup revision, what type of tools were required to remove the osteointegrated cups?

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Correct. Removal required both high-speed burring and controlled osteotomy to disengage the stable cup.
Incorrect. The correct answer is High-speed burr and modular osteotome.
Removal required both high-speed burring and controlled osteotomy to disengage the stable cup.

šŸ” Key Findings

Population: 9 dogs underwent revision of osteointegrated acetabular cups after total hip arthroplasty (THA)

Revision Indications:

  • 7 luxations (5 ventral, 2 craniodorsal)
  • 1 femoral stem fracture
  • 1 aseptic stem loosening

Implants:

  • 8 BFX cups, 1 Helica; all revised to BFX
  • 7/9 required a larger cup than original

Cup removal: Required sectioning with a high-speed burr and modular osteotome; removal fragments extracted

Complications:

  • 1 recurrent luxation
  • 1 low-grade infection with possible metallic debris-associated osteolysis
  • 2 femoral fissures managed intraoperatively

Outcomes:

  • Good to excellent function in 6/6 dogs available at median 621 days
  • Minimal complications with success in re-osteointegration of new cup

Clinical takeaway: Revision of stable, ingrown cups is feasible and offers an alternative to pelvic osteotomies; typically requires upsizing

Scott

Veterinary Surgery

3

2025

Revision of osteointegrated acetabular cup prostheses in nine dogs

2025-3-VS-scott-2

Article Title: Revision of osteointegrated acetabular cup prostheses in nine dogs

Journal: Veterinary Surgery

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In Fitzpatrick 2024 et al., on ESF for pelvic fractures in cats, what was concluded regarding neurological complications?

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Correct. Some cats presented with pre-existing deficits, but no new neurologic injuries occurred from ESF placement.
Incorrect. The correct answer is No iatrogenic neurological deficits were observed.
Some cats presented with pre-existing deficits, but no new neurologic injuries occurred from ESF placement.

šŸ” Key Findings

  • External skeletal fixation (ESF) was successfully applied to a variety of pelvic fracture types in cats, including sacroiliac luxations and ilial body fractures.
  • All fractures achieved radiographic union within 9 weeks, even in comminuted or complex configurations.
  • No intraoperative or long-term complications were reported during the study period.
  • Implant loosening was observed radiographically in 13% of cases, with 8% of pins found to be loose at frame removal.
  • ESF enabled indirect fracture reduction using components as handles, with a limited open approach minimizing soft tissue disruption.
  • No iatrogenic neurological deficits were observed, supporting safe pin placement near neurovascular structures, although some cats presented with pre-existing neurologic signs.
  • No cases required revision surgery, and all cats underwent stabilization solely with ESF as per study inclusion criteria.
  • Postoperative hospitalization ranged from 2 to 5 days, though no comparison to other fixation types was evaluated.

Fitzpatrick

Veterinary Surgery

7

2024

External skeletal fixation for the treatment of pelvic fractures in cats

2024-7-VS-fitzpatrick-3

Article Title: External skeletal fixation for the treatment of pelvic fractures in cats

Journal: Veterinary Surgery

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In Nicolas 2024 et al., what postoperative outcome was observed at 1 month?

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Correct. The dog showed only a slight forelimb lameness, with no pain or neurologic deficit:contentReference[oaicite:1]{index=1}
Incorrect. The correct answer is Slight thoracic limb lameness.
The dog showed only a slight forelimb lameness, with no pain or neurologic deficit:contentReference[oaicite:1]{index=1}

šŸ” Key Findings Summary

  • The lateral approach via scapular osteotomy allowed safe access to the T1-2 foramen in a French Bulldog with foraminal disc extrusion.
  • A mini-hemilaminectomy was performed, preserving articular facets.
  • The dog had no neurologic deficits postoperatively, returned to ambulation within 24 hours, and was discharged in 3 days.
  • At 10 months, CT confirmed excellent scapular healing and no recurrence.
  • Double 2.4-mm locking plates provided stable fixation across the scapular spine.
  • The technique avoided thoracic entry or dorsal spine dissection, suggesting a less invasive alternative for select T1-2 foraminal cases.

Nicolas

Veterinary and Comparative Orthopedics and Traumatology

2

2024

Scapular Osteotomy for Lateral Access to a T1-2 Foraminal Disc Extrusion, Treated by Mini-Hemilaminectomy in a Dog

2024-2-VCOT-nicolas-2

Article Title: Scapular Osteotomy for Lateral Access to a T1-2 Foraminal Disc Extrusion, Treated by Mini-Hemilaminectomy in a Dog

Journal: Veterinary and Comparative Orthopedics and Traumatology

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In Deveci 2025 et al., on 3D drill guides, how many screws breached the sacral canal contents?

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Correct. None of the 20 screws breached the canal contents, despite 19 breaching the canal wall (≤ grade 2).
Incorrect. The correct answer is 0.
None of the 20 screws breached the canal contents, despite 19 breaching the canal wall (≤ grade 2).

šŸ” Key Findings

  • Objective: Evaluate feasibility and accuracy of 3D-printed patient-specific drill guides for iliosacral screw placement in cadaver dogs.
  • N = 10 canine cadavers (20 hemipelves); screw placement done using fluoroscopic-assisted patient-specific guides (PSG).
  • Median cortical breach grade: 0 (IQR 0–1) for all screws.
    19/20 screws breached sacral canal wall (all ≤ grade 2), but no screws breached canal contents (grade 3).
  • Median trajectory deviation: 0.88° transverse, 0.72° dorsal.
  • Procedure time: Median 7.2 minutes for guide placement and drilling.
  • Conclusions: PSG-assisted screw placement was safe, accurate, and fast, offering clinical potential in pelvic trauma.

Deveci

Veterinary Surgery

2

2025

Evaluation of 3D‐printed patient‐specific guides to facilitate fluoroscopic‐assisted iliosacral screw placement in dogs

2025-2-VS-deveci-2

Article Title: Evaluation of 3D‐printed patient‐specific guides to facilitate fluoroscopic‐assisted iliosacral screw placement in dogs

Journal: Veterinary Surgery

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Quiz Results

Topic: Pelvic & Spinal Surgery
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