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Kwok et al: Clinical outcomes of canine total hip replacement utilizing a BFX lateral bolt femoral stem: 195 consecutive cases (2013–2019)
Veterinary Surgery 1, 2023

🔍 Key Findings

  • 97.4% of dogs returned to normal function after total hip replacement using the BFX lateral bolt.
  • Mean femoral stem subsidence was 1.22 mm, with most occurring in the first month and minimal thereafter.
  • Postoperative complication rate was 13.6%, with 9.2% major and 4.4% minor complications.
  • Femoral fractures (3.6%) and coxofemoral luxations (3.6%) were the most common major complications.
  • Increased age and higher stem size were risk factors for postoperative femoral fractures; CFI >2.0 was also associated.
  • Medial calcar fractures were avoided, and fractures occurred distal to stem ingrowth zone, simplifying repairs.
  • Three cases underwent prophylactic plating, all with excellent outcomes and no complications.
  • Explant rate was 2.6% (5/195), with most failures involving acetabular cup rather than femoral stem.

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← Articles

Kwok et al: Clinical outcomes of canine total hip replacement utilizing a BFX lateral bolt femoral stem: 195 consecutive cases (2013–2019)
Veterinary Surgery 1, 2023

🔍 Key Findings

  • 97.4% of dogs returned to normal function after total hip replacement using the BFX lateral bolt.
  • Mean femoral stem subsidence was 1.22 mm, with most occurring in the first month and minimal thereafter.
  • Postoperative complication rate was 13.6%, with 9.2% major and 4.4% minor complications.
  • Femoral fractures (3.6%) and coxofemoral luxations (3.6%) were the most common major complications.
  • Increased age and higher stem size were risk factors for postoperative femoral fractures; CFI >2.0 was also associated.
  • Medial calcar fractures were avoided, and fractures occurred distal to stem ingrowth zone, simplifying repairs.
  • Three cases underwent prophylactic plating, all with excellent outcomes and no complications.
  • Explant rate was 2.6% (5/195), with most failures involving acetabular cup rather than femoral stem.

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Multiple Choice Questions on this study

In Kwok 2023 et al., on BFX lateral bolt THR in dogs,what was the reported mean subsidence of the femoral stem at 1 month?

A. 3.0 mm
B. 2.5 mm
C. 1.22 mm
D. 0.8 mm
E. 4.0 mm

Answer: 1.22 mm

Explanation: Mean subsidence was 1.22 ± 0.16 mm at 1 month.
In Kwok 2023 et al., on BFX lateral bolt THR in dogs, what percentage returned to normal function?

A. 85.2%
B. 89.5%
C. 93.6%
D. 97.4%
E. 99.1%

Answer: 97.4%

Explanation: 97.4% of dogs returned to normal function per owner and clinical follow-up.
In Kwok 2023 et al. on BFX lateral bolt THR in dogs,what factor was most associated with postoperative femoral fractures?

A. Low body weight
B. Increased age
C. Collared stem
D. Use of cerclage wires
E. Medial calcar involvement

Answer: Increased age

Explanation: Increased age was significantly associated with postoperative femoral fractures (p = .01).
In Kwok 2023 et al., on BFX lateral bolt THR in dogs,what was the most common intraoperative complication with the BFX lateral bolt stem?

A. Femoral fracture
B. Cup malposition
C. Femoral fissure
D. Stem migration
E. Stem subsidence

Answer: Femoral fissure

Explanation: 10.3% of femurs developed medial calcar fissures during broaching.
In Kwok 2023 et al., on BFX lateral bolt THR in dogs, which type of complication most often led to prosthesis explantation?

A. Stem loosening
B. Septic arthritis
C. Prophylactic plating failure
D. Femoral fissure
E. Acetabular cup complications

Answer: Acetabular cup complications

Explanation: 4 of 5 explants were due to acetabular cup issues, not femoral stem failure.

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