It is about gnathology

1. DR JIMMY GEORGE K

2.  DEFINITION- ANGLE
“The normal relation of the occlusal inclined planes of the teeth when the jaws are
closed”
It also includes components of masticatory system- periodontal ligament, jaws,
TMJ, muscles of mastication and nervous system
These components together are called STOMATOGNATHIC SYSTEM

3.  STATIC OCCLUSION- jaws are closed and stationary
 DYNAMIC OCCLUSION- occlusal contacts made during jaw movements
 CENTRIC RELATION- most retruded physiological relationship of mandible to
maxilla
 CENRIC OCCLUSION- when mandible closes in centric relation. ICP. Full
interdigitation

7.  Maxillary teeth overlap mandibular teeth
 Anterior teeth make a very light or no contact
 Mandibular incisors and canines contact lingual surfaces of maxillary teeth
 Overjet – horizontal overlap. 2-3 mm
 Overebite – vertical overlap. 30-40%

8. Mandibular buccal
cusps are in contact
with maxillary
central fossa
Maxillary lingual
cusps are in contact
with mandibular
central fossa

14. Working side/functional side
Non working side/balancing side

15.  While placing a restoration a dentist must make effort to create an occlusion that
best suits with oral environment
 Restoration is designed in such a manner that it does not produce any disturbance
in normal condylar path

18.  Occlusal surface simulate position, height and size of cusps
 Buccal and lingual contours harmonius – not deficient or bulky
 Marginal ridge height same as adjacent teeth
 Proximal contacts are well created and properly located
 Restoration not over contoured or under contoured
 No heavy contacts between upper and lower anterior teeth
 During mandibular movements upper and lower teeth should bypass their
opponents without collisions or contacts

19.  Tooth mobility or drifting
 Repeated failure or uncementing of restoration
 Tooth wear
 Pain in individual tooth
 Difficulty in chewing
 Pain in muscles of mastication and TMJ- CLICKING
 Facial pain
 Pain or limitation of mandibular movement

20.  ARTICLUATING PAPER
What should be there?
Should show appropriate cusp
fossa contacts or cusp
marginal ridge contacts
Should be multiple and
bilaterally distributed

21.  ARTICLUATING PAPER
What should not be there?
Absence of contacts on the
restored teeth
Excessive contacts on restored
teeth

23.  “Interference can be described as undesirable occlusal contacts that produce
deviation of mandible during its closure to maximum intercuspation”
 There are four types of occlusal interferences:
1. CENTRIC
2. PROTRUSIVE
3. NON WORKING
4. WORKING
According to DAWSON, at first centric interferences should be removed and then
eccentric.

27. LUBL