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Fracka et al: Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Veterinary Surgery 3, 2025

🔍 Key Findings

Subject: 7-year-old Labrador underwent cementless total knee replacement (TKR) due to severe stifle OA.

Clinical function:

  • Improved ROM from 90° pre-op to 120° post-op.
  • Weight-bearing increased from toe-touching to 70% bodyweight by 6 weeks post-op.
  • No visible lameness by 14 weeks.

Implant performance:

  • No complications at any follow-up points.
  • No osteolysis, loosening, or metallosis at 6-year necropsy.

Wear evaluation:

  • Mild UHMWPE insert wear, localized to caudal edges.

Histologic findings:

  • Robust osseointegration at implant-bone interface.
  • Fibrous tissue only in areas lacking porous coating.

Conclusion:

  • Cementless TKR demonstrated excellent 6-year survival and functional outcomes.
  • Support for considering early surgical intervention in severe stifle OA.
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog

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← Articles

Fracka et al: Long‐term clinical outcomes and retrieval analysis of a cementless total knee replacement in a dog
Veterinary Surgery 3, 2025

🔍 Key Findings

Subject: 7-year-old Labrador underwent cementless total knee replacement (TKR) due to severe stifle OA.

Clinical function:

  • Improved ROM from 90° pre-op to 120° post-op.
  • Weight-bearing increased from toe-touching to 70% bodyweight by 6 weeks post-op.
  • No visible lameness by 14 weeks.

Implant performance:

  • No complications at any follow-up points.
  • No osteolysis, loosening, or metallosis at 6-year necropsy.

Wear evaluation:

  • Mild UHMWPE insert wear, localized to caudal edges.

Histologic findings:

  • Robust osseointegration at implant-bone interface.
  • Fibrous tissue only in areas lacking porous coating.

Conclusion:

  • Cementless TKR demonstrated excellent 6-year survival and functional outcomes.
  • Support for considering early surgical intervention in severe stifle OA.

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Multiple Choice Questions on this study

In Fracka 2025 et al., on cementless knee replacement, which implant-related finding was noted at necropsy?

A. Moderate tibial insert delamination and metallosis
B. Minor screw loosening and bone lysis
C. Mild polyethylene wear at the tibial insert caudal edge
D. Fractured femoral component and fibrous tissue ingrowth
E. Implant migration with moderate osteolysis

Answer: Mild polyethylene wear at the tibial insert caudal edge

Explanation: The post-mortem exam found mild polyethylene wear but no loosening, metallosis, or migration【57†Veterinary Surgery†L1-L20】
In Fracka 2025 et al., on cementless knee replacement, what postoperative improvement in stifle range of motion (ROM) was documented?

A. From 70° to 160°
B. From 90° to 120°
C. From 100° to 140°
D. From 80° to 110°
E. No significant change

Answer: From 90° to 120°

Explanation: ROM improved from 90° preoperatively to 120° postoperatively over 6 weeks【57†Veterinary Surgery†L1-L20】
In Fracka 2025 et al., on cementless knee replacement, what peak vertical force was measured on the operated limb at 6 weeks?

A. 40% bodyweight
B. 55% bodyweight
C. 60% bodyweight
D. 70% bodyweight
E. 85% bodyweight

Answer: 70% bodyweight

Explanation: Force plate analysis showed 70% bodyweight peak vertical force in the operated limb by 6 weeks post-op【57†Veterinary Surgery†L1-L20】
In Fracka 2025 et al., on cementless knee replacement, which advantage of cementless TKR is emphasized in the discussion?

A. Improved implant cost-effectiveness
B. Higher risk of aseptic loosening
C. Faster rehabilitation and no revision risk
D. Enhanced osseointegration and bone preservation
E. Guaranteed patellar tracking control

Answer: Enhanced osseointegration and bone preservation

Explanation: Cementless TKR offers enhanced bone integration, eliminates cement-related complications, and preserves bone stock【57†Veterinary Surgery†L1-L20】
In Fracka 2025 et al., on cementless knee replacement, what did histology confirm about the implant-bone interface?

A. Chronic fibrous tissue response
B. Lack of osseointegration
C. Infection at implant margin
D. Extensive osseointegration with new bone formation
E. Peri-implant inflammation and necrosis

Answer: Extensive osseointegration with new bone formation

Explanation: Histology revealed robust osseointegration and new bone growth into porous surfaces of both components【57†Veterinary Surgery†L1-L20】

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