orthodontic Myofunctional appliances /certified fixed orthodontic courses by Indian dental academy

MYOFUNCTIONAL APPLIANCES

INDIAN DENTAL ACADEMY
Leader in Continuing Dental Education
www.indiandentalacademy.com

www.indiandentalacademy.co

HISTORY
KINGSLEY – Introduced the term” jumping the bite” for
patients with mandibular retrusion. -1880
He used a vulcanite palatal plate with an anterior inclined
plane which guided the mandible to a forward position when
the patient closed on it.

KINGLEY’S –idea influenced the development of functional
jaw orthopedics.


Robin’s monobloc- developed in early 1900’s
is the forerunner of all the functional appliances.

But the activator developed by ANDRESEN in Norway
in the 1920’s was the first functional appliance to be
widely accepted

Functional appliances were introduced into American
Orthodontics in the 1950’s.


BIMLER’S Labio-lingual appliances- -1949

VESTIBULAR APPLIANCES-(FRANKEL)- 1967

TWIN BLOCK APPLIANCES--1977


DEFINITION

Functional appliance:-by definition is one
that
changes the posture of the mandible,holding
it open (or) open and forward (Proffit).

Stretch of the muscles and soft
tissues creates
pressures transmitted to the dental
and skeletal structures,moving teeth
and modifying growth.

Definition:

Functional appliances are passive
appliances which harness natural
forces of the oro-facial musculature
that are transmitted to the
teeth and alveolar bone in a
predetermined direction.


All functional appliances are intraoral
devices,and nearly all of them are tooth borne
or supported by teeth.

These appliances are removable,primarily
consisting of acrylic with wire components for
retention &support.

Most of the functional appliances are used to
correct early class-2 malocclusions and some
cases of class –3 malocclusions.

CLASSIFICATION
According to “Tom Graber”:-

1.Group- A- Teeth supported appliances,
-catlan’s appliance,Inclined planes.
2.Group –B-Teeth/tissue supported appliances.
-Activator,Bionator etc
3.Group-C- Vestibular positioned appliances
with isolated support from tooth /tissue,
-Frankel appliance, Lip bumpers.

ACCORDING TO PROFITT

1.Tooth borne passive-
-Andersen activator
-Woodside and Harvold activator
-Bionator
2.Tooth borne active-
-Modified activator
-Expansion activator
-Orthopaedic Corrector
-Stockli headgear activator
3.Tissue borne appliances(Passive)s
-Frankel appliance.

Other classifications

1.MYOTONIC APPLIANCES:-
Depend muscle mass for their
action.
2.MYODYNAMIC APPLIANCES:-
Depend on muscle activity for
for their function.
.


1.REMOVABLE FUNCTIONAL APPLIANCES

-Activator
-Bionator
-Frankel
-Twin Block

2.Fixed functional appliances

-Herbst
-Jasper jumper
-Forsus
(Fatigue resistant device)

ADVANTAGES OF FUNCTIONAL APPLIANCES

1.To eliminate abnormal perioral muscle functions which
interfere with normal bone growth
.
2.Treatment can be started in early mixed dentition stage.

3.Easier to maintain oral hygiene.

4.Do not have any side effects of mechanotherapy
Such as---enamel decalcification,root resorption,
--gingivitis.


Lip pads hold the lips away from
teeth and force the lips to stretch
to obtain an oral seal.

The buccal shield holds the soft tissue
away from the dentition and facilitates
posterior dental expansion by disrupting
the tongue –cheek equilibrium.

LIMITATIONS OF FUNCTIONAL APPLIANCES

1. Individual tooth movements cannot be
achieved .
2. Cannot be used in adult patients.
3. Patient cooperation is essential for the
success of the treatment.
4. Cases treated with functional appliance may
require fixed appliance therapy for final
detailing of occlusion.-2phase Rx.


BIONATOR
Developed by-Balter-1950

HORSE SHOE SHAPED-acrylic lingual plate


VESTIBULAR SCREEN (OR) ORAL SCREEN

Introduced by Newell
-1912


MODIFICATIONS OF ORAL SCREEN

KRAUS - -WITH HOLES

HOTZ -- LINGUAL SIDE
PROJECTION OF ACRYLIC TO
KEEP TOUNGE AWAY.


TWIN BLOCK APPLIANCE


Introduced by william J.Clark in--1982


Advantages of delta clasp:
1.Does not open with repeated insertion & removal.

2.Maintains its shape better and requires less adjustment.

3.Subjected to less breakage.


MODIFICATIONS OF TWIN BLOCK

BROADBENT
CLARK
MAHONY-TO OPEN & TO CLOSE
MODIFIED McNamara


MODIFIED
McNamara
TWIN BLOCK


ACTIVATOR
DEVELOPED BY VIGGO ANDRESEN-1908

LATER WAS CALLED “NORWEGIAN APPLIANCE”

Modifications were done in Norway teaming up with HAUPL

They later called it ACTIVATOR- due to its ability to
activate the muscles.


INDICATIONS OF ACTIVATOR

1. CLASS 2 DIV-1 MALOCCLUSION
2. CLASS 2 DIV-2 MALOCCLUSION
3. CLASS 3 MALOCCLUSION
4. CLASS 1 OPENBITE
5. CLASS 1 DEEP BITE
6. FOR POST TREATMENT RETENTION


CONTRANDICATIONS
1. In children with excess LFH-and extreme
vertical mandibular growth .
2. In class –1 crowding.
3. Has limited application in non-growing children.
4. In severely proclined lower incisors.


ACTIVATOR-
AND ITS
MODIFICATIONS


FUNCTION REGULATOR
OR
FRANKEL APPLIANCE


FRANKEL APPLIANCE

Developed by Prof. ROLF FRANKEL of GERMANY

Also called –Vestibular Appliance and

Oral –Gymnastic appliance
(FRANKEL –recommended
certain oral excercises called
oral gymnastics-hence the name)

FRANKEL APPLIANCE( OR)
FUNCTIONAL REGULATOR


TYPES OF
FRANKEL

1. FR1a
2. FR1b
3. FR1c
4. FR2
5. FR3
6. FR4


Parts of frankel:-
1.Buccal shields
2.Lip pads- upper and lower
3.lingual shield
4.Palatal bow
5.Labial bow—upper or lower
6.Lingual stabilizing bow
7.Canine clasp
8.protrusion bow
9.Lower lingual spring
10.Lower labial wires
11.Occlusal rest.

Parts of FR-2-Class 2-div-1&2
The acrylic components include:-
A.Buccal shields
B.Lip pads
C.Lower lingual pad
The wire components include:-
A. Palatal bow
B.Labial bow
C.Canine Extensions
D.Upper Lingual wire
E.Lingual crossover wire
F.Support wire for lip pads
G.Lower lingual springs.

DIFFERENCES
BETWEEN
ACTIVATOR &
FRANKEL


LATERAL & MEDIAL PTERYGOID
LATERAL PTERYGOID:
It is a short & conical muscle.
Has upper & lower head.

MEDIAL PTERYGOID:
Quadrilateral muscle
Has superficial & deep head
Dr VINEETH V T

MODE OF
ACTION OF
FUNCTIONAL
APPLIANCE


Commonly used fixed functional appliances:-

1. Herbst Appliance
2. Jasper jumper
3. Forsus (Fatigue resistant device.)
4. MARA –Appliance (Mandibular anterior
5. repositioning device)
6. Eureka Spring


FIXED
MYOFUNCTIONAL
APLIANCES


THANK YOU


orthodontic Myofunctional appliances /certified fixed orthodontic courses by Indian dental academy

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to orthodontic Myofunctional appliances /certified fixed orthodontic courses by Indian dental academy

Similar to orthodontic Myofunctional appliances /certified fixed orthodontic courses by Indian dental academy (20)

More from Indian dental academy

More from Indian dental academy (20)

Recently uploaded

Recently uploaded (20)

orthodontic Myofunctional appliances /certified fixed orthodontic courses by Indian dental academy