“Why no bite registration for the Nylon FlexTAP, Legacy flexTAP, or myTAP?”
Short answer: No bite is needed.
Understanding “why no bite”, requires a familiarity of the pathophysiology of sleep apnea, why “dental” appliances were initially used for treatment, and the subsequent necessity of creating oral appliances that specifically address “airway management” during sleep.
Understanding the Problem: Obstructive Sleep Apnea (OSA)
OSA occurs when the pharyngeal airway partially or completely collapses during sleep. The main causes are anatomical factors (narrow jaws, large tongue, obesity) plus the natural drop in muscle tone during sleep.
To keep the airway open, the mandible (lower jaw) must be held forward (protrusive). This:
- Stiffens the soft tissues on the sides of the throat
- Increases the “box” size (airway volume)
- Moves the tongue forward and out of the airway
This is the same basic maneuver used in CPR or anesthesia — pull the jaw forward and slightly upward to open the airway.
Why Traditional “Dental” Appliances Need a Bite
The earliest devices tried for OSA were actually orthodontic appliances (monobloc, Herbst, dorsal) designed over 100 years ago to grow jaws in children. These appliances:
- Required a precise construction bite so the lab could build the device with the jaw locked in one forward position
- Used acrylic between the teeth, restricting tongue space
- Often needed elastic bands to keep the jaws locked together at night
- Had very limited adjustability and forced the mandible into a rigid, teeth-together position
Most modern sleep appliances are still based on this old dental/orthodontic thinking. That’s why they usually require a bite registration — to set the exact starting position because their adjustment range is small (typically 5–7 mm) and their hardware is complex.
The flexTAP / myTAP Difference: Built Like Airway Management, Not Dentistry
The original TAP 1 (and all flexTAP and myTAP designs that followed) was deliberately built using CPR and emergency airway principles, not traditional dental rules:
- No posterior contact and minimal encroachment on freeway space — the upper and lower trays do not touch in the back
- Single midline tether (the adjustment screw) that suspends the mandible in a protrusive, slightly open position
- Generous vertical and protrusive freedom — up to 17 mm of smooth adjustment
- External tether that sits outside the mouth, allowing natural movement and easy titration
- No hooks, no part swapping, and no need to lock the jaws together
Because there is no contact between the upper and lower trays, there is nothing to “set” with a bite registration. The device holds the jaw forward while still allowing the tongue freedom to move and the jaw to find its most comfortable airway-friendly position.
Bottom-Line Advantages
- Far more adjustable than traditional devices (17 mm vs 5–7 mm)
- Works well with many bite types, including open bites
- Easier and faster to deliver — no bite registration step
- Patient or clinician can fine-tune while the device is in the mouth
- Clinical studies on TAP appliances (including myTAP) show excellent results without using a bite registration
In short, the flexTAP family was designed as a true medical airway device, not a modified dental appliance. By following the simple, proven logic of airway opening (forward + slight vertical space + generous adjustability), it removes the need for a bite while delivering superior comfort and effectiveness for most patients.
