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FAQ


Will the BBC continue to improve?
Yes, we try to improve the BBC continually. Therefore it is very important to get your feedback.

Can a patient help himself in case there is a problem with the BioBiteCorrector (BBC)?
We recommend to always consult an orthodontist. The screws of the can be BBC opened with a standard 0.9 mm hexagonal wrench.

How to make it easier to slide the BBC on the maxillary arch?
Because of the ball joint, the body is very mobile. It has been clinically proven that sliding the BBC in "straight" position (see video) over the archwire makes it easier. The clinical video on the website is also useful; it demonstrates in real time how to completely mount the BBC on a patient in only 3 minutes.

Losing the titanium screws frequently.
Be sure to use an archwire with a width of .025 inches. You can use a light-curing flow composite in addition to fixing the screws. They can be unscrewed in a classical manner by using the BBC screwdriver.

Power assisted insertion of the screws.
The screwdriver of the BBC allows fixing the screws with a dental machine. We do not recommend this with a classic micromotor. It has too many revolutions per minute, an excessive torque force, and the risk to damage the threads of the BBC. Therefore, we recommend the prosthodontic screwdriver of the company W&H. This has an adjustable moment of force (Ncm 8-40) and only 25 rotations per minute.

How can I avoid fractures of the archwire?
We recommend using a stainless steel archwire with a minimum size of .017 x .025 inches. It should always be an archwire with a width of .025 inches.

Why isn’t there any coil spring inside the BBC MS and BBC Classic?
The BBC is working with the method of "Jumping the bite". In this case, only the hinge length determines the desired mandibular position. Therefore, the BBC doesn’t require coil spring. The "Jumping the bite" method is proven. Many removable functional appliances such as Twinblock and the fixed Herbst appliance operate on this philosophy’s principle.

How long the BBC has to stay on?
The BBC works like a fixed Herbst treatment. The Herbst appliance is very well documented in the literature. In general, the BBC-treatments takes 6 months in moderate cases. In adults or extreme Class II cases, the BBC should be removed after 9 months. The BBC therapy can be shortened for smaller Class II cases (4 months). After the BBC treatment, the patient has to wear short Class II elastics for stabilization.

How can we adjust the movement of the lower jaw?
The hinge length (closed BBC) determines the desired mandibular position. After installing the BBC, guide the lower jaw as far as possible backward. If there is still a distal occlusion, the lower jaw can be shifted forward by using the distance spacers. A spacer is 1,5mm, so for instance, to move the lower jaw forward of 4mm, 3 spacers are needed. It means the activation is 4,5mm, so there is a half-millimeter excess. This can be adjusted by sliding the BBC on the archwire 0,5mm forward.

How do the BBC attachments work?
The BBC attachments can be welded to a single band by using a laser. We do not recommend a classical soldering. Due to the large influence of heat, the material properties of the band are significantly deteriorated. For retention splints and snoring devices in combination with a BBC, the attachments can be polymerized on an aligner.

Self-ligating brackets
When using a BBC in combination with SL-brackets, the brackets should be secured with a ligature to protect the locking mechanism.

Ceramic brackets
No ceramic brackets should be used in direct vicinity of the BBC's connecting element. Generally, this concerns the canine of the lower jaw and the first premolar. In the maxillary arch, it concerns the second premolar.

Rebonding brackets
The following procedure has been proven successful when immediately incorporating a steel archwire after a bracket loss. In the bracket, ligate a piece of steel archwire before rebonding. The rebonded bracket can be oriented more easily on the adjacent bracket slot, and can be bonded securely, passive in most cases.

After installing the BBC, no tooth contact is usually present in the posterior region.
Through the forward displacement of the mandible in the direct Class I, the posterior teeth usually have no tooth contact. This is referred to as "christensen phenomenon", which is performed by the "jumping the bite". The teeth extrude automatically during the BBC treatment and the deep bite is automatically corrected. After the BBC treatment, the patient has to wear short Class II elastics for stabilization and for a full tooth contact.

Can the "christensen phenomenon" be reduced?
A gradual advancement of the mandible can reduce the "christensen phenomenon". In this case, after installing the BBC no spacers are used. The use of the size "Small" in a non-extraction case can be considered.

The canine in the upper jaw is in contact with the lower connecting element of the BBC
In general, a contact between the BBC and the canine isn’t a problem, but it is possible to move the lower jaw forward with spacers. Then the overbite will decrease, the posterior desocclusion will increase and there won’t be a contact with the canine of the upper jaw anymore.