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Forzisi et al: Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Veterinary Surgery 1, 2025

🔍 Key Findings

Population: 24 dogs (<8.5 months) undergoing unilateral cementless THR.
Growth Impact:

  • Operated femurs showed ~11.5% less trochanteric growth than controls (p = .002).
  • No significant difference in femoral diaphyseal + epiphyseal length (p = .712) or femur overall (p = .465).

Cortical Width:

  • Increased significantly at 10 mm distal to trochanter (4.6% increase, p = .037) and at 50% femoral length (8.5% increase, p = .030).

Clinical relevance: Despite measurable changes, no clinically significant impairment to femoral length occurred.
Effect Sizes:

  • Moderate negative for trochanteric growth.
  • Moderate positive for proximal femoral width.
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs

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← Articles

Forzisi et al: Evaluation of the effects of cementless total hip replacement on femoral length in skeletally immature dogs
Veterinary Surgery 1, 2025

🔍 Key Findings

Population: 24 dogs (<8.5 months) undergoing unilateral cementless THR.
Growth Impact:

  • Operated femurs showed ~11.5% less trochanteric growth than controls (p = .002).
  • No significant difference in femoral diaphyseal + epiphyseal length (p = .712) or femur overall (p = .465).

Cortical Width:

  • Increased significantly at 10 mm distal to trochanter (4.6% increase, p = .037) and at 50% femoral length (8.5% increase, p = .030).

Clinical relevance: Despite measurable changes, no clinically significant impairment to femoral length occurred.
Effect Sizes:

  • Moderate negative for trochanteric growth.
  • Moderate positive for proximal femoral width.

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Multiple Choice Questions on this study

In Forzisi 2025 et al., on femoral growth post-THR, what hypothesis regarding trochanteric growth was supported?

A. THR does not alter trochanteric growth
B. THR promotes proximal femoral growth
C. THR reduces growth across entire femur
D. THR reduces trochanteric growth
E. THR accelerates greater trochanter development

Answer: THR reduces trochanteric growth

Explanation: The 11.5% decrease in trochanteric growth supports the hypothesis that THR reduces growth in this region.
In Forzisi 2025 et al., on femoral growth post-THR, which femoral region showed significantly reduced growth in operated limbs?

A. Femoral diaphysis
B. Femoral condyles
C. Femoral head
D. Greater trochanter
E. Proximal metaphysis

Answer: Greater trochanter

Explanation: Cementless THR reduced trochanteric growth by 11.5% compared to controls (p = .002).
In Forzisi 2025 et al., on femoral growth post-THR, how did femoral cortical width change at 50% femoral length?

A. It decreased by 8.5%
B. It remained unchanged
C. It increased by 8.5%
D. It increased by 2.3%
E. It decreased by 2.3%

Answer: It increased by 8.5%

Explanation: THR increased femoral cortical width by 8.5% at 50% length (p = .030).
In Forzisi 2025 et al., on femoral growth post-THR, what was the effect of THR on total femoral length?

A. Total femoral length was significantly reduced
B. Total femoral length showed negligible change
C. Total femoral length increased significantly
D. Total femoral length showed extreme shortening
E. Total femoral length lengthened more than control

Answer: Total femoral length showed negligible change

Explanation: THR caused a 2.3% smaller increase in femoral length (p = .465), not clinically significant.
In Forzisi 2025 et al., on femoral growth post-THR, what was the relationship between age at surgery and femoral length difference?

A. Younger age → more length loss
B. Older age → more width increase
C. Younger age → greater femoral offset
D. Age at surgery had no significant effect
E. Older dogs → more trochanteric loss

Answer: Age at surgery had no significant effect

Explanation: No statistical association was found between age and femoral length change (p = .462–.745).

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