Year : 2012 | Volume
: 1 | Issue : 1 | Page : 16--22
Reliable coupling of orthodontic elements to mini-implants: An in-vitro study
Björn Ludwig1, Holger Zipprich2, Britta Gebel3, Ben Piller4, Joanna Antoszewska5
1 Department of Orthodontics, University of Homburg / Saar Kirrberger Strasse 1, D- 66421 Homburg / Saar, Germany
2 Department of Prosthodontics, Johann Wolfgang Goethe University Frankfurt, Germany
3 Private Office, Friedhofweg 5, 92676 Eschenbach, Germany
4 Department of Orthodontics, Tel Aviv University, Israel, Israel
5 Department of Dentofacial Orthopedics and Orthodontics, Wroclaw Medical University, Poland
Objectives: To investigate the reliability of mechanical and adhesive methods of fixing rectangular wires in the cross-slot of a mini-implant.
Materials and Methods: A twin-hooked wire element was placed and fixed in the slot of a mini-implant via a NiTi spring under tension, or by means of an adhesive. For the purpose of mechanical anchorage, the wire was crimped with a special crimping tool to increase its thickness and prevent it from slipping through the slot. Before applying the adhesive, there were four possible methods of preparation: Untreated Wire (Adh. 1); ROCATEC-Pre (Adh. 2); ROCATEC-PRE + Espe Sil (Adh. 3); ROCATEC-PRE + ROCATEC-PLUS + Espe Sil (Adh. 4). The mechanical fixing and two adhesive fixings were aged by means of temperature change (500 cycles). A Zwick universal testing machine was used to measure the maximum strength of the coupling.
Results: In all tests, the untreated wire + adhesive withstood the lowest maximum load (Ø 3 N and 10.8 N respectively) and failed the aging test after a maximum of eight cycles. The wires in test group Adh. 4 withstood the highest maximum load (Ø 43.3 N; 41.5 N; 45.9 N after aging) in all tests. The average load withstood by the crimped ligature was 38.7 N.
Conclusion: The adhesive method of fixation performs best when the rectangular wire is sand blasted and silanized before application. The mechanical coupling using the crimped ligature is reliable.
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|How to cite this article:|
Ludwig B, Zipprich H, Gebel B, Piller B, Antoszewska J. Reliable coupling of orthodontic elements to mini-implants: An in-vitro study.J Orthodont Sci 2012;1:16-22
|How to cite this URL:|
Ludwig B, Zipprich H, Gebel B, Piller B, Antoszewska J. Reliable coupling of orthodontic elements to mini-implants: An in-vitro study. J Orthodont Sci [serial online] 2012 [cited 2020 Jul 11 ];1:16-22
Available from: http://www.jorthodsci.org/article.asp?issn=2278-0203;year=2012;volume=1;issue=1;spage=16;epage=22;aulast=Ludwig;type=0