A practical approach to determining screw preload in dental implant systems

Area of Science:

• Biomaterials Science
• Mechanical Engineering
• Dental Implantology

Background:

• Dental implant screw systems require precise preload for joint stability.
• Traditional torque-based tightening methods are unreliable due to friction variability (±35%).
• Current preload testing methods involve complex and expensive equipment.

Purpose of the Study:

• To introduce a practical and novel technique for determining preload in dental implant screw systems.
• To overcome the limitations of traditional torque-based tightening procedures.
• To provide a more reliable method for assessing joint integrity in dental implants.

Main Methods:

• Integrating tightening torque, removal torque, and screw geometry measurements.
• Subtracting friction components from torque data to isolate preload.
• Developing a practical approach applicable in both testing and clinical practice.

Main Results:

• The novel technique accurately determines preload by accounting for friction variations.
• This method reduces the variability in achieved preload compared to traditional methods.
• It eliminates the need for multiple test conditions to account for surface variations.

Conclusions:

• The described technique offers a practical and reliable solution for determining dental implant screw preload.
• This method enhances the predictability and stability of dental implant joints.
• It simplifies preload assessment, reducing reliance on complex testing equipment.