Transcript MOUTH GAURDS AND BITE PLANES

MOUTH GUARDS
AND
BITE PLANES
MOUTH GUARD
It is an appliance that has different
terminologies such as (Bite guards
,Night guards ,Guide splints ,Stints &
Others ) .
 It is a removable appliance
constructed to fit over the dentition .
 It is used for a therapeutic relief for
TMJ symptoms or muscle complaints
or to protect teeth from accidental
injures .

MATERIAL USED


Clear acrylic resin .
Wrought orthodontic wire
clasps to increase retention .
TYPES OF MOUTH GUARDS:
1. Preformed such as :

Stock mouth guard .

Mouth guard protector .
This type provides protection for athletic
people but they are inaccurate & should be
temporarily used .
2. Custom made
This type is constructed by a dentist which
makes them more accurate & comfortable
to the pt .
REQURMENT FOR MOUTH
GUARD
1. It should cover the entire occlusal
surface of the teeth with a thin layer of
acrylic resin to :
a. Provide maximum tooth contact .
b. Prevent elongation or depression of
teeth .
2. The occlusal surface should be
narrow & flat .
3. It should maintain a uniform contact in
centric relation & immediate
disocclusion in eccentric mandibular
movement .
4. Missing teeth should be incorporated
into the mouth guard .
5. All tissue contacting surfaces should
be smooth & polished to prevent
tissue irritation .
6. If dental arches are malaligned ,or
if there is no posterior support in the
mandibular arch ,night guard should
be constructed for both dental
arches to provide stability .
7. It should not interfere with
breathing & speaking .
PURPOSES OF MOUTH
GUARD
1. To relive TMJ symptoms &
muscle spasm .
2. Migraine headaches .
3. To create an a symptomatic pt ,to
permit true hinge axis opening &
lateral border movement without
neuromuscular interference .
PERIOD OF WEARING
MOUTH GUARD
> It is usually 4-6 weeks prior to functional
analysis procedure or location of hinge axis
& mandibular movement .
 Recall after 3-5 days to check if there is any
shiny facets which should be removed
especially in molar areas .
 Usually the guard is placed in the maxillary
arch except in CL III malocclusion it will be in
mandibular arch .
 If there is any missing teeth guards will be
fabricated in both arches .
CLINICAL INSTRUMENTATION
1.
2.
3.
4.
5.
6.
7.
Perforated upper & lower tray .
Alginate impression .
Spatula .
Rubber bowel .
Measuring cup .
Wax bite .
May be face bow transfer .
INSERTION
1.
2.
3.
4.
5.
Mouth guard should have certain
acceptable criteria :
Close adaptation to anatomic structures .
Uniform thickness .
Smooth peripheral borders .
Extended to maxillary tuberosity .
Should not impinge on vestibular or
gingival tissues & frenum .
INSTRUMENTS NEEDED
DURING INSERTION
1. Slow speed hand piece .
2. Acrylic bur .
3. White stone bur .
4. Articulating ribbons (Red, Blue
,Green)
BITE PLANES
It is a shelf of acrylic added to the
baseplate to clear the occlusion or to
reduce the over bite if it interfere with
tooth movement .
TYPES OF BITE PLANES
1. Anterior bite plane.
2. Posterior bite plane .
1. ANTERIOR BITE PLANE
> It can be used when the
occlusion interferes with
tooth movement or when we
have deep bite .
> They are usually flat &
parallel to the occlusal
plane.
REQUREMENTS
1. Enough height to disocclude posterior
teeth 2-3 mm .
2. Enough width to occlude with lower
incisors when the mandible is Retruded .
3. It should not encroach tongue space .
POSTERIOR BITE PLANES
INDICATION :
1. Reduced or average overbite .
2. Reversed overjet .
3. Unilateral posterior crossbite .
REQUIREMENTS :
1. It should be thin .
2. It has to be wide enough to
cover buccal & lingual surfaces .
3. Occlusion should be equal in
both sides .
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