LATERAL SULCUS

   Clinical significance

•     JUDGE THE INTER ARCH DISTANCE

•     AT A VERY EARLY STAGE

DENTAL GROOVE

•     *Originates in the incisive papilla

•     *Extends backwards to touch the

•     Gingival groove in the canine region &

•     Laterally to end in the molar region

      *‘u’ shaped

ANTERIOR→→EVERTED LABIALLY

*Gingival groove→demarcates lingual

Extend of gumpads

*Dental groove→from mandible to gingival

Groove in the canine region

LOWER GUMPAD

*Lateral  SULCUS→ seperates

Canine & DECIDUOUS FIRST

MOLAR SEGMENTS

PERIODS OF OCCLUSAL DEVELOPMENT

i.                 PREDENTAL JAW RELATIONSHIP(NEONATE’SMOUTH)

ii.             THE DECIDUOUS DENTITION

iii.          THE MIXED (TRANSITIONAL)

iv.          THE PERMANENT DENTITION

GUM PADS DEVELOP IN TWO PARTS:


-LABIAL PORTION (DIFFERENTIATES FIRST)

-LINGUALPORTION(DIFFERENTIATES LAST

IDEAL OCCLUSION

·      THE PERFECT INTERDIGITATION OF THE UPPER AND LOWER TEETH,WHICH ISA RESULT OF DEVELOPMENTAL PROCESS CONSISTING OF THE THE THREE MAIN EVENTS, JAW GROWTH, TOOTH FORMATION AND ERUPTION.

OCCLUSION

DEFINITION

ACCORDING TO ANGLE,

THE NORMAL RELATION OF THE

OCCLUSAL INCLINED PLANES OF

THE TEETH WHEN THE JAWS ARE

CLOSED.  

DEVELOPMENT OF OCCLUSION

This is a new topic which help us to learn about development of occulusion

CONCLUSION

¨ Cavity design should be in biologic and structural harmony with the tissues of the teeth .all details of the cavity preparation should be decided according to the nature of the disease, properties of the tooth tissues and restorative material to be used

CLASS III CAVITIES

¨When the contact is open the outline is triangular with base towards the gingival aspect of the cavity

¨Gingival cavity wall is inclined occlusally to parallel the enamel rod direction