Aligning very rotated molars

From Volume 17, Issue 1, January 2024 | Page 41

Authors

Kelly Smorthit

MChD/BChD, MFDS RCS (Ed), MRes, MOrth RCS (Ed)

Speciality Registrar in Orthodontics, LDI/Chesterfield Royal Hospital

Articles by Kelly Smorthit

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Jonathan Sandler

BDS (Hons), MSc, PhD, MOrth RCS, FDS RCPS, BDS(Hons), MSc, PhD, FDSRCPS, MOrth RCS, Consultant Orthodontist, , DOrth RCS

Consultant Orthodontist, Chesterfield Royal Hospital, Chesterfield, UK

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Article

Placing a flexible archwire through a significantly rotated or displaced molar tube from the mesial can be almost impossibly difficult (Figure 1). This trick of the trade describes an alternative method of access to help ensure efficient placement, allowing early alignment of the rotated or displaced tooth.

Figure 1. Displaced lower wisdom tooth with impossible access from the mesial.

This simple solution involves inserting a flexible 0.016” Sentalloy NiTi archwire from the distal opening of the molar tube (Figure 2). Aim to hold the archwire with a clip 10 mm from the distal end of the and thread it through the distal end of the tube (Figure 3). Pick up the protruding portion of the wire on the mesial aspect (Figure 4) and thread it through the adjacent molar tubes (Figure 5). Finally, pull the archwire all the way forward before tying it in to the remaining molar tubes and bracket slots as usual. Within a couple of months, the displaced molar will be sufficiently aligned to allow insertion of an 18/25 Neo-Sentalloy NiTi wire if thought appropriate.

Figure 2. Holding the NiTi archwire with a clip 10 mm from the distal end.
Figure 3. Thread the archwire through from the distal, exiting mesially.
Figure 4. Pick up the archwire mesially then thread it through the next molar tube.
Figure 5. Continuing to thread archwire forward through the bracket tubes.

Figures 68 also demonstrate the effectiveness of this technique.

Figure 6. Archwire pulled anteriorly to allow engagement of the entire lower arch.
Figure 7. Lower left second molar position rapidly corrected.
Figure 8. Post treatment.