Journal of Orthodontic Science

ORIGINAL ARTICLE
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

Correspondence Address:
Björn Ludwig
Am Bahnhof 54, D - 56841 Traben-Trarbach
Germany

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.


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 2019 Sep 23 ];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