Publication
Wear of the implant connection with zirconia and titanium abutments
| dc.contributor.author | José, A. R. | |
| dc.contributor.author | Marco, M. | |
| dc.contributor.author | Maurício, P. J. | |
| dc.contributor.author | Diogo, M. | |
| dc.contributor.author | Fátima, Vaz M. | |
| dc.contributor.author | Luís, R. | |
| dc.contributor.author | Ignacio, B. N. | |
| dc.date.accessioned | 2019-07-23T15:49:18Z | |
| dc.date.available | 2019-07-23T15:49:18Z | |
| dc.date.issued | 2017-10 | |
| dc.description.abstract | Background: Classify and quantify the wear of the implant and abutment interface simulating a loose screw situation. Methods: Nine external connection titanium implants were split into 4 groups: Group A (no hexagon titanium abutment), Group B Titanium abutment (with hexagon) (n=3), Group C Zirconia abutment with hexagon (n=3) and Group D mix abutments (n=2). All components were individually weighted and the rotational freedom for each pair was access before and after testing. The specimens were tested an Instron 8874 fitted with a dynamic load cell with a torque capacity of 100Nm and a precision of 0.5% from 1% of the full scale. They were loaded with a sinusoidal rotational angle that was different for each group (A= 6º, B= 3.3º, C= 0.835º, D=6.6 º), 4 Hz, for 250.000 cycles. After testing all components were photographed with a SEM. Spearman’s correlation analysis was made. Results: Regardless of angle and materials the rotational freedom increased in all groups. Volume loss with zirconia abutment was more than double than with a titanium abutment. Conclusion: The loose screw in implant prosthesis may lead to the wear of the hexagon on both components. This wear is sufficient to compromise the connection beyond repair | pt_PT |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.citation | José AR, et al. Wear of the implant connection with zirconia and titanium abutments. J Dental Sci 2017, 2(6): 000149. DOI 10.23880/oajds-16000149 | pt_PT |
| dc.identifier.doi | 10.23880/oajds-16000149 | pt_PT |
| dc.identifier.issn | 2573-8771 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/29323 | |
| dc.language.iso | eng | pt_PT |
| dc.publisher | Medwin Publishers | pt_PT |
| dc.relation.publisherversion | https://medwinpublishers.com/OAJDS/OAJDS16000149.pdf | pt_PT |
| dc.subject | Titanium abutment | pt_PT |
| dc.subject | Zirconia abutment | pt_PT |
| dc.subject | Loose screw | pt_PT |
| dc.title | Wear of the implant connection with zirconia and titanium abutments | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.startPage | 000149 | pt_PT |
| oaire.citation.title | Journal of Dental Sciences | pt_PT |
| oaire.citation.volume | 2(6) | pt_PT |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |