Complex sentence: This screw needs to be tightened to a predetermined torque, in order to avoid screw loosening during chewing, which can often create a counter-clockwise torque on the implant-abutment interface, encouraging the abutment screw to come loose.
Split into simpler sentences: This screw needs to be tightened to a predetermined torque, in order to avoid screw loosening during chewing. Occlusal masitcatory forces can often create a counter-clockwise torque on the implant-abutment interface, encouraging the abutment screw to come loose.