3. Bone growth
Aug 19, 2020 ·
5m 21s
![3. Bone growth](https://d3wo5wojvuv7l.cloudfront.net/t_square_limited_480/images.spreaker.com/original/0e3fb5bbb02cd54643c198c0e57b883c.jpg)
Download and listen anywhere
Download your favorite episodes and enjoy them, wherever you are! Sign up or log in now to access offline listening.
Description
BONE GROWTH Don’t confuse bone growth with bone formation above Growth of bone is by apposition — layer by layer deposition Whereas cartilage growth is by two...
show more
BONE GROWTH
Don’t confuse bone growth with bone formation above
Growth of bone is by apposition — layer by layer deposition
Whereas cartilage growth is by two ways one is appositional and other is interstitial method, which is how mandibular condyle grows.
Mandible growth starts at 6th wk of IUL & completes at 12-13 years
Individual — 1st bone to ossify — clavicle— entire body
1st bone to ossify in head — mandible -2nd bone to ossify overall
Maxilla growth starts after mandible but completes earlier than mandible
Start (6th wk of IUL)----- (MANDIBLE) --------------finish (12-13 years)
-----------------START -------------------FINISH-------------------------
-------------------------------MAXILLA-----------------------------------
MANDIBLE
Primary cartilage of mandible — Meckel’s cartilage
but it does not individually induce or contribute to
mandibles growth
Secondary cartilage — condylar cartilage
This cartilage contributes to its growth*
Direction of growth — anterior and inferiorly
Direction of apposition @ condylar — posteriorly and superiorly
V shape principle- is shown by the mandibular growth
MAXILLA
Formed entirely by intramembranous ossification
Growth is by apposition at sutures and surface remodelling
Direction of growth/migration – downward and forward
Direction of apposition – downward at alveolar area and at tuberosity area
MAXILLA IN A NUTSHELL:
o Increases in height by continuous growth at alveolar bone
o Increases in width by mid-palatine suture
o Increases in depth by apposition at anterior region and tuberosity
show less
Don’t confuse bone growth with bone formation above
Growth of bone is by apposition — layer by layer deposition
Whereas cartilage growth is by two ways one is appositional and other is interstitial method, which is how mandibular condyle grows.
Mandible growth starts at 6th wk of IUL & completes at 12-13 years
Individual — 1st bone to ossify — clavicle— entire body
1st bone to ossify in head — mandible -2nd bone to ossify overall
Maxilla growth starts after mandible but completes earlier than mandible
Start (6th wk of IUL)----- (MANDIBLE) --------------finish (12-13 years)
-----------------START -------------------FINISH-------------------------
-------------------------------MAXILLA-----------------------------------
MANDIBLE
Primary cartilage of mandible — Meckel’s cartilage
but it does not individually induce or contribute to
mandibles growth
Secondary cartilage — condylar cartilage
This cartilage contributes to its growth*
Direction of growth — anterior and inferiorly
Direction of apposition @ condylar — posteriorly and superiorly
V shape principle- is shown by the mandibular growth
MAXILLA
Formed entirely by intramembranous ossification
Growth is by apposition at sutures and surface remodelling
Direction of growth/migration – downward and forward
Direction of apposition – downward at alveolar area and at tuberosity area
MAXILLA IN A NUTSHELL:
o Increases in height by continuous growth at alveolar bone
o Increases in width by mid-palatine suture
o Increases in depth by apposition at anterior region and tuberosity
Information
Author | Dr.Mayakha Mariam |
Organization | Dr.Mayakha Mariam |
Website | - |
Tags |
-
|
Copyright 2024 - Spreaker Inc. an iHeartMedia Company