In Jeon 2025 et al., on distal femoral shortening, what was the **median femoral shortening ratio** required to achieve prosthesis reduction?
A. 7.5%
B. 10.2%
C. 13.8%
D. 16.1%
E. 18.4%
Answer: 13.8%
Explanation: The median femoral shortening length ratio was 13.8% (range: 10.7–15.3%) to enable prosthesis reduction.
In Jeon 2025 et al., on distal femoral shortening, what was the **outcome regarding neurovascular complications** post-DFSO?
A. One case of femoral nerve palsy
B. All dogs developed mild sciatic neuropraxia
C. No neurovascular complications were observed
D. Transient nerve deficits in two dogs
E. Chronic neuropathic pain in one dog
Answer: No neurovascular complications were observed
Explanation: Despite >4 cm displacement in some cases, no neurovascular damage was reported after DFSO.
In Jeon 2025 et al., on distal femoral shortening, what was the **main indication** for performing DFSO during THR in dogs with luxoid hips?
A. To address proximal femoral deformity
B. To reduce hip luxation postoperatively
C. To manage irreducible prostheses when standard tension-relieving techniques failed
D. To treat aseptic loosening of femoral stems
E. To prevent sciatic nerve injury during THR
Answer: To manage irreducible prostheses when standard tension-relieving techniques failed
Explanation: Intraoperative inability to reduce the prosthesis using conventional methods triggered the need for DFSO.
In Jeon 2025 et al., on distal femoral shortening, which **advantage of DFSO over subtrochanteric osteotomy** is highlighted in dogs?
A. Lower cost and faster recovery
B. Improved proximal femoral torsion
C. Easier acetabular cup alignment
D. Preservation of proximal femoral anatomy for stable fixation
E. Allows larger stem size
Answer: Preservation of proximal femoral anatomy for stable fixation
Explanation: DFSO avoids disrupting critical proximal structures needed for stem fixation.
In Jeon 2025 et al., on distal femoral shortening, which **complication was observed intraoperatively** during the THR procedure?
A. Femoral stem loosening
B. Fracture of the greater trochanter
C. Aseptic prosthesis loosening
D. Prosthetic luxation
E. Sciatic nerve palsy
Answer: Fracture of the greater trochanter
Explanation: One intraoperative complication occurred: a greater trochanter fissure during trial reduction prior to DFSO.
