• Save
Growth of mandible  /certified fixed orthodontic courses by Indian dental academy
Upcoming SlideShare
Loading in...5
×
 

Growth of mandible /certified fixed orthodontic courses by Indian dental academy

on

  • 672 views

...



The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.


Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078

Statistics

Views

Total Views
672
Views on SlideShare
672
Embed Views
0

Actions

Likes
0
Downloads
50
Comments
0

0 Embeds 0

No embeds

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Growth of mandible  /certified fixed orthodontic courses by Indian dental academy Growth of mandible /certified fixed orthodontic courses by Indian dental academy Presentation Transcript

  • GROWTH OF MANDIBLE www.indiandentalacademy.com
  • INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  • GROWTH OF MANDIBLE www.indiandentalacademy.com
  • PRE NATAL GROWTH OF MANDIBLE  EMBRYONAL  FETAL PERIOD PERIOD www.indiandentalacademy.com
  • FETAL PERIOD The alveolar plate lengthens more rapidly than does the ramus  The ratio of the alveolar plate length to total mandibular length is reasonably constant  The width of the alveolar plate shows a more rapid increase than does total width  The ratio of the width between the mandibular angle to total width is relatively constant during fetal life  www.indiandentalacademy.com
  • STRUCTURES RELATED TO DEVELOPING MANDIBLE  INFERIOR DENTAL NERVE  MECKEL’S  TOOTH CARTILAGE GERMS www.indiandentalacademy.com
  • DEVELOPMENTAL ELEMENTS RELATED TO THE MANDIBLE  NEURAL  ALVEOLAR  RAMAL  MUSCULAR  CARTILAGENOUS www.indiandentalacademy.com
  • DEVELOPMENT OF THE MANDIBLE www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • ANATOMY OF THE MANDIBLE www.indiandentalacademy.com
  • MEDIAL ASPECT www.indiandentalacademy.com
  • LINGUAL VIEW www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • SKELETAL UNITS www.indiandentalacademy.com
  • TEMPORALIS MUSCLE www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • MUSCLES OF THE TMJ www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • PRIMARY &SECONDARY CARTILAGE www.indiandentalacademy.com
  • Variation in tissue arrangement adjacent to endochondral bone formation a.bone b.prechondroblasts c.chondroblasts d.resting cartilage e.mature cartilage f.transitional zone g.dense fibrous connective tissue h.bone & marrow of epiphysis i. Articular cartilage www.indiandentalacademy.com
  • CONDYLAR CARTILAGE a. b. c. d. Capsular layer(densely fibrous) Layer of prechondroblastic cellscellular proliferation New developing cartilage Continually forming endochondral bone www.indiandentalacademy.com
  • CONDYLAR REMODELLING      PERIOSTEAL RESORPION ENDOSTEAL DEPOSITION CONDYLE MOVES IN A SUPEROPOSTERIOR COURSE NECK IS NARROWED DOWN NECK IS LOCATED IN POSITION OF CONDYLE www.indiandentalacademy.com
  • ENLOW’S “V” PRINCIPLE www.indiandentalacademy.com
  • CONDYLAR RESECTION IN RHESUS MONKEY      Facial height is less in A than in B Accentuation of anti gonial notch Shorter,wide anteriorly positioned ramus Larger and heavier coronoid process Reduced facial height on operated side www.indiandentalacademy.com
  • OSTEOCHONDRAL RIB TRANSPLANT   Each precursor chondroblast divides 35-50 times Each progenitor chondroblast divides 8-11 times www.indiandentalacademy.com
  •  The chondroblasts issuing from a progenitor chondroblast produce a pyramid-like structure that is a component of the primary growth cartilage of the rib www.indiandentalacademy.com
  • RIB TRANSPLANT EXPERIMENT OBSERVATIONS Intracellular concentrations of Na+ tended to decrease  Intracellular concentrations of Ca++ & H+ ions tended to increase  Intracellular pH was lowered  Na+ & K+ -ATPase activity was intensified  Ca++, Mg++ - ATPase ,and H+ - ATPase activities were diminished  The numbers of cell divisions declined slightly and demonstrated a significant slowing of growth rate  Similar variations were observed in condylar cartilage of rats and humans www.indiandentalacademy.com 
  • Differentiation rate of the precursor chondroblast into progenitor chondroblast is submitted not only to the command represented by genetic,hormonal, humoral factors but also to epigenetic biomechanic factors Also autologous osteochondral rib transplant is preferable in treatment of TMJ ankylosis than metatarsal cartilage transplant www.indiandentalacademy.com
  • Sectioning of mandible into parts for study www.indiandentalacademy.com
  • TRANSVERSE SECTION OF CONDYLAR NECK Lingual surface A has received periosteal deposits  B is composed of endosteal compacted cancellous bone produced during condylar neck reduction  C has received periosteal depositsas post.border of neck grows in post.direction  D buccal area growing in endosteal direction lller to B  E is undergoing resorption as ant.part of neck grows in a www.indiandentalacademy.com cephalic direction towards side A 
  • Remodelling Process www.indiandentalacademy.com
  • Coronoid Process & Ramus www.indiandentalacademy.com
  • Remodelling at the lingual tuberosity www.indiandentalacademy.com
  • The posterior growth of the tuberosity is accomplised by continued new deposits of bone on its posteriorfacing exposure. Part of the ramus just behind the tuberosity remodels medially www.indiandentalacademy.com
  • LOGARITHMIC CURVE FOR MANDIBULAR GROWTH www.indiandentalacademy.com
  • CONCLUSION The spatial movements of the mandible, and of the mental foramen, related to the “rotation” of this logarithmic spiral are clear indications of the passive translation of the macro-skeletal unit within the expanding oro-facial capsule,which is a response to the primary morphogenetic enlargement of the oro-nasal functioning spaces. The posterior and upward movements of the mandibular foramen ,on the other hand, accurately reflect the active transformative growth changes of the several mandibular microskeletal units due to deposition and resorption of bone brought about www.indiandentalacademy.com periosteal matrices by the action of
  • RAT INCISORS www.indiandentalacademy.com
  • Logarithmic spiral applied to rat incisors www.indiandentalacademy.com
  • OSTEOCLAST www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  •  www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • www.indiandentalacademy.com
  • AGE CHANGES IN THE MANDIBLE www.indiandentalacademy.com
  • Thank you www.indiandentalacademy.com Leader in continuing dental education www.indiandentalacademy.com