P2-ORTHO PPT 5

-Cranial vault

-Cranial base

-Maxilla (nasomaxillary complex)

-Mandible

LIST THE 4 AREAS OF CRANIO FACIAL COMPLEX

these are boens that SURROUND the brain

What does the cranial vault do?

FLAT BONES

WHat type of bones are in cranial vault?

Conenctive

What type of tissue is the fontanelles

Allows considerable amount of deformation of the skull at birth

WHat does the fontabelles do?

Holds the brain from below

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what does the cranial base do?

cranial base

THis is the dividing line between the cranium and the face

Synchondroses

Primary cartilagenous growht sites in Cranial base

-Interspehnoidal

-Intraoccipital

-Spheno-ethmoidal

-Spheno-occipital

list the synchondroses Bones of cranial base

intersphenoidal

What bone of CB is during birth

intraoccipital

What bone of CB is 3-5 years old

-Spheno-ethmoidal

WHat bone of CB is 6-7 years old

-Spheno-occipital

What bone of CB is 15-20 years old

-Spheno-ethmoidal

WHat bone of CB is the most anterior

Achondroplasia

COndition where there is a decreased growth of cartilage in the cranial base, resulting in a lack of forward translation of the maxilla

postnatally

how does the maxilla develop?

-Apposition

-Surface modeling/ remodelling

Growth of maxilla occurs in 2 ways:

in the sutures

In maxilla where does apposition (deposition) happen?

-push from behind by cranial growth

-growth at sutures

2 movements of maxilla

until age 6

In the growing of the maxilla, what is the age for push from behind by cranial base growth

Around age 7

In the growing of the maxilla, what is growth at the sutures

the front surfaces are being remolded

What happens as the maxilal growns downward & forward?

downward-forward

physical movement of growth displacement

Upward-backward

Physical movement of cortical drift

Craniosynostosis

One or more of skull suture close too early before brain has finishde growing

Fibroblast growth factor receptor (FGFR)

In achondroplasia, what is protein is affected?

PHYSICAL MOVEMENT OF THE WHOLE BONE AS A UNIT

MEAING OF GROWHT DISPLACEMENT

INTRAMEMBRANOUS & ENDOCHONDRAL OSSIFICATION

IN MANDIBLE, IT OSSIFIES THROUGH COMBINATION OF WHAT OSSIFICATION?

-DOWNWARD AND FOWARD

-UPWARD AND BACKWARD

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THE MANDIBLE IS TRANSLATED_____________ & ________________ & GROWS ____________________ IN RESPOSNE TO THIS TRANSLATION

SOMATIC TISSUES/SOMATIC GROWTH

WHAT GROWTH DOES MANDIBLE FOLLOW?

FIRST 4 YEARS OF YOUR LIFE

MORE THAN HALF OF YOUR FACIAL BONES OCCURS AT WHAT AGE?

12 YEARS OLD

WHAT AGE IS WHEN 90%COMPLETE FACIAL BONES

18 YEARS OLD

MANDIBLE CONTINUE TO GROW UNTIL WHAT AGE?

SUPERIROR POSTERIOR REGION OF

-CORONOID PROCESS

-CONDYLE

-POSTERIOR BORDER OF THE RAMUS

DEPOSITION OF MANDBIEL HAPPENS WHERE?

ANTERIOR REGION OF

-CORONOID PROCESS

-CONDYLE

-BODY OF MANDIBLE

-ANTERIOR BORDER OF THE RAMUS

RESORPTION OF MANDIBLE HAPPENS WHERE

GENETIC THEORY

THEORY GROWTH CONTROLLED BY GENETIC INFLUENCES

SICHER'S THEORY

THEORY OF GROWTH ABOUT SUTURELA GROWHT

SCOTT'S THEORY

THEORY OF GROWTH DEPENDS ON CARTIALGE AND PERIOSTEUM

MOSS THEORY

THIS IS CALELD THE FUNCTIONAL MATRIX THEORY

MOSS THEORY

MOST WIDELY ACCEPTED THEORY

PETROVIC'S THEORY

THIS IS THE SERVO SYSTEM THEORY

AGE 10

NASAL BONE GROWHT IS COMPLETE BY AGE?

LIP HEIGHT RELATIVELY SHORT

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WHAT IS THE LIP DURING MIXED DENTITION

CHANGES IN FACIAL SOFT TISSUES WITH AGING

WHAT MUST BE TAKEN INTO CONSIDERATION IN ORTHODONTIC TREATMENT

neural growth pattern

What pattern does maxilla follow?