Effect of screw insertion torque on push-out and cantilever bending properties of five different angle-stable systems.

Objective: To compare the screw push-out strength and resistance to cantilever bending of 5 different angle-stable systems using 4 different insertion torque values to tighten locking screws.

Study Design: In vitro mechanical testing of 5 screw-plate constructs.

Sample Population: Screw plate constructs (n = 60) were tested; 12 of each design, 3 for each torque value.