In Bae 2025 et al., on SI screw orientation, what was the observed failure mode in all specimens?
A. Screw breakage
B. Sacral fracture
C. Screw pull-out
D. Rotational failure
E. Ilial fracture
Answer: Rotational failure
Explanation: All constructs failed via rotation only, with no screw breakage or fractures reported.
In Bae 2025 et al., on SI screw orientation, how much greater was peak torque in RhRSI compared to RhLSI?
A. About 100% greater
B. About 150% greater
C. About 200% greater
D. About 240% greater
E. About 300% greater
Answer: About 240% greater
Explanation: RhRSI had 67.55 N cm vs 28.14 N cm for RhLSI, approximately 2.4-fold difference (p < .01).
In Bae 2025 et al., on SI screw orientation, what clinical recommendation arises from the findings?
A. Always use right-handed screws
B. Use left-handed screws on right SI
C. Use right-handed screws on both SI joints
D. Match screw handedness to luxation side
E. Thread direction has no clinical impact
Answer: Match screw handedness to luxation side
Explanation: Using left-handed screws on the left and right-handed screws on the right yielded superior rotational resistance.
In Bae 2025 et al., on SI screw orientation, which parameter did NOT differ significantly among groups?
A. Yield torque
B. Peak load
C. Moment arm
D. Yield load
E. Maximum torsional force
Answer: Moment arm
Explanation: Moment arm measurements showed no significant differences (p = .82), ensuring fair comparison of torque outcomes.
In Bae 2025 et al., on SI screw orientation, which screw-side combination yielded the highest rotational stability?
A. Left-handed screw on right SI
B. Right-handed screw on left SI
C. Left-handed screw on left SI
D. Right-handed screw on right SI
E. Right-handed screw on both sides
Answer: Right-handed screw on right SI
Explanation: Right-handed screws on right SI (RhRSI) had the highest torque and load values (e.g., 313% more torque vs RhLSI, p < .01).
