One of the most serious and prevalent problems associated with the restorative aspect of dental implants is loosening and fracturing of screws. Different techniques have been suggested to help prevent this complication. 1,2,3 A recent study examined the effect of different torque application techniques (torqued, retorqued once, and retorqued twice) on the removal torque of implant-supported fixed complete dental prostheses.
Retightening abutment screws once after the initial torquing could enhance the removal torque of the screw. Care must be taken when retorquing the screws more than once, as this may inversely affect the removal torque.1
Which technique do you use? Do you retorque twice in your practice?
1. Int J Oral Maxillofac Implants. 2017 Mar/Apr. The Effect of Torque Application Technique on Screw Preload of Implant-Supported Prostheses Al-Otaibi HN
2. Winker S, Ring K, Ring JD, Boberick KG. Implant screw mechanics and the settling effect: an overview. J Oral Implantol. 2003;29:242–245. (in this study the authors recommend that: “Implant screws should be retightened 10 minutes after the initial torque application as a routine clinical procedure to help compensate for the settling effect.”
3. Siamos G, Winkler S, Boberick KG. The relationship between implant preload and screw loosening on implant-supported restorations. J Oral Implantol. 2002;28:67–73.