LOGIN
 
Share Page:
Back

Volume 30 , Issue 6
November/December 2015

Pages 1310–1316


Coating Dental Implant Abutment Screws with Diamondlike Carbon Doped with Diamond Nanoparticles: The Effect on Maintaining Torque After Mechanical Cycling

Laura Soares Souto Lepesqueur, DDS, MSc/Viviane Maria Gonçalves de Figueiredo, DDS, MSc, PhD/Leandro Lameirão Ferreira, DDS, MSc/Argemiro Soares da Silva Sobrinho, DDS, MSc, PhD/Marcos Massi, DDS, MSc, PhD/Marco Antônio Bottino, DDS, MSc, PhD/Lafayette Nogueira Junior, DDS, MSc, PhD


PMID: 26574857
DOI: 10.11607/jomi.3933

Purpose: To determine the effect of maintaining torque after mechanical cycling of abutment screws that are coated with diamondlike carbon and coated with diamondlike carbon doped with diamond nanoparticles, with external and internal hex connections. Materials and Methods: Sixty implants were divided into six groups according to the type of connection (external or internal hex) and the type of abutment screw (uncoated, coated with diamondlike carbon, and coated with diamondlike carbon doped with diamond nanoparticles). The implants were inserted into polyurethane resin and crowns of nickel chrome were cemented on the implants. The crowns had a hole for access to the screw. The initial torque and the torque after mechanical cycling were measured. The torque values maintained (in percentages) were evaluated. Statistical analysis was performed using one-way analysis of variance and the Tukey test, with a significance level of 5%. Results: The largest torque value was maintained in uncoated screws with external hex connections, a finding that was statistically significant (P = .0001). No statistically significant differences were seen between the groups with and without coating in maintaining torque for screws with internal hex connections (P = .5476). Conclusion: After mechanical cycling, the diamondlike carbon with and without diamond doping on the abutment screws showed no improvement in maintaining torque in external and internal hex connections.


Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.

 

© 2017 Quintessence Publishing Co, Inc JOMI Home
Current Issue
Ahead of Print
Archive
Author Guidelines
About
Accepted Manuscripts
Submission Form
Submit
Reprints
Permission
Advertising
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us
Help