Preload and friction in an implant–abutment–screw complex including a carbon-coated titanium alloy abutment screw: an in vitro study

Purpose An experimental approach was designed to measure the preload force, the coefficient of friction and the component of the tightening torque that is needed to surmount the thread-friction in an implant–abutment–screw complex that includes a carbon-coated screw. With the determined preload valu...

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Bibliographic Details
Published in:International journal of implant dentistry 2023-03, Vol.9 (1), p.8-8, Article 8
Main Authors: Sagheb, K., Görgen, C.-I., Döll, S., Schmidtmann, I., Wentaschek, S.
Format: Article
Language:English
Subjects:
Abutment screw
Bone Screws
Carbon
Coefficient of friction
Dental Alloys
Dental implant
Dental Implant-Abutment Design
Dental implants
Dentistry
Friction
Immediate Dental Implant Loading
Mathematical analysis
Medicine
Preload
Tightening
Titanium
Titanium alloys
Titanium base alloys
Torque
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Summary:Purpose An experimental approach was designed to measure the preload force, the coefficient of friction and the component of the tightening torque that is needed to surmount the thread-friction in an implant–abutment–screw complex that includes a carbon-coated screw. With the determined preload values the coefficient of friction was calculated. Methods 25 unused complexes, containing an implant, an abutment and a carbon-coated titanium alloy abutment screw, were tested. A custom load frame with two load cells and associated electronics was used. The threads were not lubricated. All abutment screws were torqued ten times to 25 Ncm. The produced preload values and a force that was proportional to the thread-friction component of the tightening torque were recorded. Results Mean preload values decreased significantly with the number of repetitions ( p  
ISSN:2198-4034
2198-4034
DOI:10.1186/s40729-023-00473-3