FDA Functional Appliance Orthodontics Geheel open Activator

Bite Planes

Upper anterior inclined bite plane used in case where there is severe retroclination of lower anteriors

Uses guiding mandible forward

Proclination of retroclined lower anteriors

Reduction of overbite

SVED BITE PLANE

It’s a modification of anterior bite plane where the acrylic base is extended on to the incisal one third of the labial surface of the anteriors inorder to prevent proclination of the teeth which may be caused due to inclined plane effect of bite plane. 

This helps to reinforce anchorage also

POSTERIOR BITE PLANE 

Extension of acrylic base plate over the occlusal surface of posterior teeth

INDICATIONS

• To give occlusal clearance for correction of cross bite
• Diagnosis of occlusal prematurities
• Cases with tmj dysfunction 

CATALANS APPLIANCE

This appliance is used to correct cross bite of young patients whose permanent molars have not erupted and decidous molars are also lost due to extraction

This is used on lower anteriors where appliance make use of muscle forces and guides erupting tooth into normal position

CONTRAINDICATION

Lack of over bite

Cross bite due to true mandibular prognathism

MODE OF ACTION

When appliance is worn the teeth can come into contact only in the anterior region during various functions 

ORAL SCREENS

Oral screen is a thin sheet of acrylic processed over the occluded waxed working cast extending deep into the sulcus both labially and buccally which act as a screen between teeth and musculature

INDICATIONS

Mouth breathing

Thumb sucking

Tongue thrusting

Lip biting

Muscle exerciser

CONTRAINDICATION

Patients with mouth breathing due to nasal obstruction

MECHANISM OF ACTION

Retraction of anteriors

To keep perioral musculature away from exerting its force

Forms mechanical barrier and prevents mouth breathing ,thumb sucking ,lip biting etc

APPLIANCES FOR THUMB SUCKING AND TONGUE THRUSTING

Hawleys plate with anterior bite plane

Appliance with tongue guard

Appliance with a bead

Tongue guard should be long enough to prevent tongue from thrusting on maxllary incisors short enough to prevent I nterfering with lower incisor

Antero posteriorly they should be placed between canines if not lateral thrust develops

Appliance for correcting lip biting

A lip bumper is used to correct lip biting

Can be used in maxilla or mandible to shield away the lips

As lips are kept away the pt cant bite lip