CHAPTER 19 Stage III checks
The inspection interval in Stage III is approximately 2 months. As the entire torquing and tip correcting process is essentially built-in, and self-limits automatically, progress and maintenance checks are normally all that is required; it is unusual for an archwire to require removal, except for running repairs or possibly upgrading a deep tunnel auxiliary.
This is the most common adjustment needed during Stage III and takes only a few moments to perform. Except when premolar and canine uprighting is almost complete, a very small amount of free space should be available in each arch, to give the crowns the extra ‘elbow room’ they require as they upright.
The method used is very much the same as described under ‘cinchbacks’ in the last chapter. First, the four incisors should be released from the archwire by removing the modules. The tapered tips of a light wire plier should then be inserted in the contact mesial to the molar band, grasping the archwire immediately mesial to the buccal tube, before gently rotating the handles forward (Fig. 19.5). Only about half a millimetre of wire will need to be fed through from each side. This needs to be observed carefully. The easiest way to do this is to watch the crimpable hook; the slightest forward movement will be sufficient. The elastomeric modules can then be replaced, which will gather the incisors fractionally forward. During the early part of the third stage, and particularly in extraction cases, it is common to have to repeat this simple process at later visits.
This is included here for the benefit of Rx-1 users. It was described in the previous edition of this book as only ever required towards the end of treatment, on selected teeth. The aim is to facilitate the delivery of the final torque prescription, also to increase bodily control, where required, for anchorage purposes. In practice, this refers to />