Implant abutment screw torque generated by general dentists using a hand driver in a limited access space simulating the mouth

For various reasons, dentists may be tempted to definitively tighten implant abutment screws using only handheld screwdrivers. The purpose of this study was to test the ability of general dentists to generate implant abutment screw preload using a simple screwdriver in a limited-access space simulating the mouth. Results indicated that mechanical torque wrenches must be used in posterior areas of the mouth to establish sufficient preload, and dental experience is not a major factor in the ability to tighten an implant abutment screw.