Torque generated by handheld screwdrivers and mechanical torquing devices for osseointegrated implants

Area of Science:

• Dental Implantology
• Biomaterials Engineering
• Clinical Dentistry

Background:

• Accurate torque application is critical for dental implant stability and component longevity.
• Handheld screwdrivers are commonly used by clinicians, but their torque control is often unverified.
• Variability in applied torque can lead to implant failure or complications.

Purpose of the Study:

• To evaluate the torque control accuracy of experienced clinicians using handheld screwdrivers for Brånemark implant components.
• To assess the torque output and variability of mechanical torqueing devices.
• To determine the necessity of calibrated devices for precise dental implant procedures.

Main Methods:

• Experienced clinicians applied specific torque values (10, 20, 32 Ncm) using handheld screwdrivers.
• Torque output was measured and compared to manufacturer specifications.
• Manually operated and electronic mechanical torquing devices were tested for accuracy and consistency.

Main Results:

• Clinician torque application with handheld screwdrivers varied significantly (0.7-36.2 Ncm across settings).
• Manually operated mechanical devices met manufacturer tolerances.
• Electronic devices showed speed-dependent torque variations, deviating from set values.

Conclusions:

• There is substantial variability in clinicians' ability to achieve desired torque with handheld screwdrivers.
• Calibrated mechanical torqueing devices are indispensable for ensuring accurate and reliable dental implant component assembly.
• Standardized torque control is crucial for successful dental implant outcomes.