Trouble Shooting

There are voids or ledges in the composite of the fixed retainer after I remove the acrylic retainer stent??

Simply flow some composite material into the voids directly and then replace the stent back into position.  The stent will cause the flowable composite to fill all the voids, then after curing for 30 seconds and again removing the stent, you will have a uniformly shaped and sealed fixed retainer.

I can’t get the retainer to seat properly during initial placement?

Do not panic; simply cut the retainer distal to the canine teeth with some scissors.  It should now be easier to seat and you can cure the fixed retainer as you intended.  Once you have polished and finished the retainer, take a new impression and send to CFast and we will send you a new removable acrylic retainer.

Flowable composite has gone between the teeth at the gum margins, what do I do??

Firstly, when you are preparing the teeth for retainer placement you should try to avoid letting your bond get down towards the gums or up at the incisal level, just keep it to the middle third of the lingual surface of the teeth.  This will make polishing and finishing much easier.  If some composite goes where it shouldn’t, you should then just be able to flick it off with a Ward’s Carver instrument or Sickle Scaler.  If the composite has been bonded and you cannot remove it easily, you will have to carefully drill it away with fine-grit pointed high speed polishing burs.  These will allow you to accurately remove the composite caught in the embrasures without damaging the natural tooth.

I can’t get the floss down distal to the Canine teeth??

Sometimes flowable composite is bonded between the Canine and Premolar teeth at their contact points during the retainer placement.  You can use serrated finishing strips such as Brasseler VisionflexTM strips to relieve and smooth these contacts.

My impressions keep tearing when I am trying the ‘bracket-on’ impression technique??

This is an easy fix, just place twice the amount of ribbon wax under and around the brackets.  We only need an accurate impression of everything above the brackets incisally and the lingual surfaces of the teeth, so don’t worry about putting more wax under the brackets to block out all the undercuts.

What do I do if the fixed retainer breaks??

All you need to do is contact CFast and we can send you some more of the fibre-composite retainer material for a small fee.  Just drill away some of the composite either side of the retainer where it is broken, perhaps a tooth either side.  Cut the fibre material to length and then bond this to the teeth with a conventional composite bonding method.  Flow some composite over the retainer to ensure all the fibres are covered, polish and finish.  You can always call one of our experienced technicians who will explain this repair technique to you in detail.

I’m reviewing the retainer some time later and some of the fibres are showing?

Simply etch, bond, and then flow some more flowable composite over the exposed fibres; this is all you will need to do to ensure the retainer lasts a very long time.

My patient has chewed through the removable retainer??

No problems, take a new impression and we CFast can make a harder-wearing retainer for you patient for a small charge.