Intermaxillary traction is used during the procedure to increase the vertical distance of the face

For adults, the angle is low, the plane angle is unstable, the muscles are blocked, and it is easy to relapse.

Adult high-angle cases with weak muscles can remain stable

It is stable for growing children

In most adults with average and low angles, the back teeth will be depressed to the original position. This is not obvious during the treatment process and is easy to relapse after the treatment is completed.

Adult high-angle cases: distally tilted posterior teeth can easily lead to an open mandibular plane angle, and the posterior teeth should be adjusted

Suitable for cases of lingual inclination of the incisors, labial inclination of the lower incisors and labial inclination of the upper incisors, root torque control

During the growth period, as the posterior teeth erupt and elongate, the bite will continue to open.

Can be used in adult cases, achieved by labial inclination and intrusion of the incisors, which can be achieved by depressing the auxiliary arches

Brackets are bonded to the lower incisors to facilitate their movement

The flat guide plate allows the lower incisors to bite the horizontal guide plate, raising the occlusion and limiting the elongation of the incisors.

The back teeth are separated by 3-4mm, which promotes the growth of the back teeth.

High-angle cases, maxillary brackets are bonded, causing the upper incisors to tilt labially

Low-angle cases, anterior plane guide,

Lingual adhesive

Molar and maxillofacial (𬌗 pad)

Even-angle low-angle deep overbite case, a band is bonded on the second molar

Arch wire: niti ~ 1925 stainless steel square wire ~ (after being placed for at least 6 weeks) plus torque: maxillary incisor 20° lingual torque at most

Mandibular incisor archwire 10-15° root labial torque

Opening the occlusal curve: The upper jaw will increase the lingual torque of the root of the incisors, which is beneficial. The mandibular arch wire opens the occlusal curve or anti-spee curve, resulting in labial inclination of the lower incisors.

Before the mandibular archwire opens the occlusal curve, about 10°-15° of root labial torque should be added

If the second molar is added to the orthodontic system, a 3-4mm anti-spee curve should be added to the archwire.

Lingual tilt of lower incisors

Before the dental arch is completely leveled and the bite is not fully opened, the gap cannot be closed, which will deepen the overbite.

Reduce front protrusion

Solve crowding of front teeth

Abnormal canine position: After the canine root position is normal and the canine bracket angle is ideal, the bracket is bonded to the incisor. At the same time, the archwire can be bent mesially to the canines to exert a slight depressive force on the incisors.

:The canine tilts toward the extraction socket to bend the arch wire and deepen the overbite.

Excessive force will cause the incisor torque to fail and should be controlled (150-200g, active ligation) Add torque to maxillary archwire incisor area

habit appliance

Maxillary stenosis: development of midpalatal suture

Placing palatal bars and lingual arches on molars

closing mat

High traction facebow and vertical chin pocket

For patients with severe crowding or protrusion, deciduous canines and premolars should be extracted

myofunctional therapy

Referral to otolaryngology for people with tonsil and adenoid disease

Crowding or protrusion of upper and lower dental arches: extraction 4

If the mandibular teeth are not extracted, the lower dental arch will move lingually, and the type II molar relationship will exceed 3-4mm, and the upper teeth will be extracted 4,

If the mandibular teeth are not extracted, the lower dental arch will move lingually, and the distal relationship between the molars is less than 3 mm. The maxillary molars should be extracted carefully. Because it is difficult to move the upper molars forward 4-7mm If 8 exists, 7 can be removed. This will move 6 distally without increasing the mandibular plane angle.

The upper and lower incisor brackets can be opened and closed 0.5mm gingivally from the normal position.

In the early and middle stages of open bite cases, adhesive tape rings are not recommended for the second molars, as they will cause the 456 to elongate. In order to improve the position and control the torque in the later stage, it can be glued, the spee curve is retained at the back of the lower dental arch, and the maxillary arch wire is curved with a step on the second molar.

Assistive devices see Early Disposal

Category II and Category III traction, the posterior part of the traction is placed on the premolars, short force traction is used to reduce the elongation of the posterior part of the dental arch.

The plastic base is removed from the incisal area of ​​the maxillary retainer, and a small hole is placed in the front.