6533b821fe1ef96bd127b96e

RESEARCH PRODUCT

A Novel Technique Using Polytetrafluoroethylene Tape to Solve Screw Loosening Complication in Implant-Supported Single Crowns

Cristina Gómez-poloRocío OrtegaMiguel Gómez-poloRubén Agustín-panaderoMichell MedinaLuis F Félix

subject

Novel techniqueMaterials sciencemechanical complicationsHealth Toxicology and MutagenesisBone Screws0206 medical engineeringDentistrylcsh:Medicine02 engineering and technologyArticle03 medical and health scienceschemistry.chemical_compound0302 clinical medicineCyclic loadingDental Restoration Failurescrew looseningPolytetrafluoroethyleneTitaniumPolytetrafluoroethyleneCrownsbusiness.industrylcsh:RPublic Health Environmental and Occupational Health030206 dentistrypolytetrafluorethylene020601 biomedical engineeringimplant single crownsfixed dental prosthesisTorquechemistryScrew looseningDental Prosthesis Implant-SupportedImplantbusinessImplant supported

description

This study aimed to analyze a novel technique to make screws with greater untightening resistance and to solve screw loosening in implant-supported single crowns. Thirty grade IV titanium straight abutments were screwed onto 30 external hex implants using grade IV titanium screws (30 Ncm). They were exposed to cyclic loading (300,000 cycles, 200 N). Samples were divided into 4 groups (15 samples per group): new screws (SCREW group) (control), reused screws (rSCREW group), new screws wrapped with polytetrafluoroethylene (PTFE) tape (PTFE group), and reused screws wrapped with PTFE tape (rPTFE group). Reverse torque values (RTVs) were recorded with a digitally calibrated implant motor. Mean RTVs observed were 14.46 N (&plusmn

yearjournalcountryeditionlanguage
2020-12-27International Journal of Environmental Research and Public Health
10.3390/ijerph18010125http://dx.doi.org/10.3390/ijerph18010125