The Functional Trainer 
Customisable Functional Appliance T4F™ has the TRAINER attributes plus it can be moulded to fit tightly to the upper arch and locks in the mandible into Class I. Retains dental position and has the MYOFUNCTIONAL EFFECT™. The dual layer technology with moldable EVA outer skin is heated and fitted to the patient’s mouth. More bulky than the single larger TRAINERS, but the fit and retention are better. Replaces the need for laboratory made Class II activator or retainer.
Features: Functional appliance, retainer after arch expansion, MYOFUNCTIONAL EFFECT™. Dual layer, semi mouldable technology, thermoplastic outer material, for custom tight fit. Double Arch
Clinical Applications Retainer after Class II correction, Interim Retainer Replacement for traditional “functional” appliances, retention between phase I and II treatment, Class II correction and retention. Early treatment with expansion or Class II correction can be lost while waiting for the permanent dentition. More Information Recommended minimum use – ONE HOUR DAILY plus OVERNIGHT WHILE SLEEPING Thermoplastic outer material provides the convenience of "boil and bite" customised fit (regularly remouldable if adjustment is needed), Semi-rigid Polyurethane frame maintains shape and all design features during customization. Customize in under 5 minutes - The T4F™ can be customised by fitting directly to the patient or indirectly using upper and lower models (preferred in mixed dentition).The T4F™ is heated in boiled water for 2 minutes then placed into the patient’s mouth after cooling for just one second under cold tap water. Position firmly into upper dentition then have the patient move the lower teeth into the bottom channel and bite down on the T4F™ as hard as possible. At the same time a vacuum is created by sucking in strongly with the lips closed and the tongue pushed up into the palate with the tip on the Tongue Tag. After holding this position for at least 20 seconds the T4F™ is removed and placed in cold water. Class II correction AND myofunctional habit correction - Once customised, you have a Functional Appliance which is particularly good for Class II correction after maxillary expansion. As well as the Functional effect the T4F™ will also correct the associated myofunctional habits i.e. tongue thrusting, mouth breathing, a required feature missing from other commonly used orthopaedic appliances. NO LAB FEES, no waiting, adjustable by remoulding - With the T4F™ there is no more waiting for lab construction. It can be fitted in the same time as it takes to make an impression and can be remoulded to accomodate erupting teeth or to improve the fit. The T4F™ can be used to replace Class II correction "functional" appliances like the Clark Twin Block and Bionator. It is cheaper, easier to apply and will not break."