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Journal of orthodontic science v.1 no.1, 2012년, pp.16 - 22  

Reliable coupling of orthodontic elements to mini-implants: An in-vitro study

Ludwig, Björn    (Department of Orthodontics, University of Homburg / Saar Kirrberger Strasse 1, D- 66421 Homburg / Saar, Germany   ); Zipprich, Holger    (Department of Prosthodontics, Johann Wolfgang Goethe University Frankfurt, Germany   ); Gebel, Britta    (Private Office, Friedhofweg 5, 92676 Eschenbach, Germany   ); Piller, Ben    (Department of Orthodontics, Tel Aviv University, Israel   ); Antoszewska, Joanna    (Department of Dentofacial Orthopedics and Orthodontics, Wroclaw Medical University, Poland  );
  • 초록  

    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.


  • 주제어

    Adhesive .   coupling elements .   cross-slot .   in-vitro experiment .   NiTi spring .   orthodontic mini-implants .   orthodontic wire .   rectangular wire.  

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