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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

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

  • Concepts of growth process www.indiandentalacademy.com
  • INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  • Growth of Maxilla & Mandible Clinical Implications of growth & development www.indiandentalacademy.com
  • Concept 1 Facial growth and development is a morphogenic process working toward a composite state of aggregate structural and functional balance among all the multiple,regional growing and changing hard and soft tissue parts. www.indiandentalacademy.com
  • Concept 2 Bone grows by adding new bone tissue on one side of bony cortex and taking it away from other side. -Deposition -Resorption -Cortical drift www.indiandentalacademy.com
  • Concept 3 The outside and inside surfaces of bone are completely blanketed by a mosaic like pattern of ‘growth field’. www.indiandentalacademy.com
  • Concept 4 Bone produced by covering membrane constitutes about ½ of all cortical bone tissue present ;bone laid down by the lining membrane makes up the other ½. www.indiandentalacademy.com
  • Concept 5 Bone doesn't grow by itself ,growth is produced by the soft tissue matrix that encloses each whole bone. www.indiandentalacademy.com
  • Concept 6 All the various resorptive and depository growth fields throughout a bone don’t have same rate of growth activity .Some depository fields grow much more rapidly than other.The same is true for resorptive.These are called as growth sites. www.indiandentalacademy.com
  • Concept 7 Remodeling is a process where bone deposition and resorption occurs so as to bring about change in size, shape , relationship of the bone. www.indiandentalacademy.com
  • Concept 8 Primary displacement-as bone enlarges it is simultaneously carried away from other bones in direct contact with it . www.indiandentalacademy.com
  • Concept 9 Secondary displacement-It is the movement of a whole bone caused by the separate enlargement of other bones. www.indiandentalacademy.com
  • Concept 10 Facial growth is a process that requires intimate morphogenic interactions among all of its component growing ,changing and functioning soft and hard tissue parts.No part is developmentally independent and self contained. www.indiandentalacademy.com
  • Growth of maxilla and mandible www.indiandentalacademy.com
  • Growth of maxilla www.indiandentalacademy.com
  • -Develops intramembranously -Growth by three mechanisms  Displacement  Growth at sutures  Surface remodeling www.indiandentalacademy.com
  • Displacement Secondary displacement -important growth mechanism of maxilla [primary dentition ] •-Nasomaxillary complex is moved in downward and forward direction. www.indiandentalacademy.com
  • •Primary displacement •-it moves maxilla in forward direction www.indiandentalacademy.com
  • Growth at sutures Maxilla connected to the cranium and cranial base by – 1]Fronto-nasal suture 2]Fronto-maxillary suture 3]Zygomatico-maxillary suture 4]Zygomatico-temporal suture 5]Pterygo-palatine suture www.indiandentalacademy.com
  • Surface remodeling It brings about 1]increase in size 2]change in shape of bone 3]change in functional relationship a) Orbit b) Nose www.indiandentalacademy.com
  • •c) Palate d) Maxillary tuberosity –bone deposition at posterior margin www.indiandentalacademy.com
  • e) Zygomatic bone –resorption on anterior surface and deposition on the posterior surface f) Alveolar process-grows downwards and forward carrying teeth .This increases height and depth of palate. www.indiandentalacademy.com
  • g) Sinus h) Anterior nasal spine –prominence increases by bone deposition . www.indiandentalacademy.com
  • Growth sites 1]Maxillary tuberosity 2]Sutures 3]Alveolar border 4]Nasal septum www.indiandentalacademy.com
  • Growth of mandible www.indiandentalacademy.com
  • Includes • • • • • • • • Ramus Corpus or the body of mandible Angle of the mandible The lingual tuberosity The alveolar process The chin The condyle The coronoid process www.indiandentalacademy.com
  • Ramus •Moves progressively posterior by a combination of deposition and resorption . Functions of remodeling 1]To accommodate muscles 2]To accommodate space 3]To facilitate the lengthening of mandibular body www.indiandentalacademy.com
  • Corpus or the body of mandible Displacement of the ramus results in the conversion of former ramal bone into the posterior part of the body of mandible. www.indiandentalacademy.com
  • Angle of the mandible Lingual-Resoption on the posteroinferior aspect while deposition occurs on the anterio-superior aspect Buccal-resorption on the anteriosuperior part and deposition on the postero-superior part . Prominence of antegonial notch and change in gonial angle www.indiandentalacademy.com
  • The lingual tuberosity -It is an direct equivalent of the max tuberosity. www.indiandentalacademy.com
  • •-It moves posteriorly by deposition on posteriorly facing surface. •It also protrudes in a lingual direction . www.indiandentalacademy.com
  • The alveolar process Grows upwards ,outwards,forwards . Develops in response to the tooth buds. With increases by growth at suture at 1 year www.indiandentalacademy.com
  • The chin Mental protuberance forms by bone deposition . It is accentuated by bone resorption that occurs in the alveolar region above it , creating a concavity. www.indiandentalacademy.com
  • The condyle Two schools of thought 1]earlier –growth occurs at the surface of the condylar cartilage by means of bone deposition . www.indiandentalacademy.com
  • •2]now –growth of soft tissues including the muscles and connective tissue carries the mandible . www.indiandentalacademy.com
  • The coronoid process Growth is by ‘V’ principle Deposition occurs on the medial surfaces of left and right coronoid process . It brings about posterior growth movement in the ‘V’ pattern . Growth direction follows the x arrows . www.indiandentalacademy.com
  • Growth sites of mandible 1]mandibular condyle 2]posterior border of ramus 3]alveolar process 4]lower boarder of mandible 5]suture. www.indiandentalacademy.com
  • Clinical implication of growth and development www.indiandentalacademy.com
  • Growth Sprut The sudden increase in the growth of general body is called as growth sprut. www.indiandentalacademy.com
  • Growth sprut Woodside in study of Burlington groupthree main growth spruts Girls Boys 1]Just after birth 3yrs 3yrs 2]Juvenile 6-7yrs 7-9yrs 3]Pubertal 10-12yrs 12-15yrs www.indiandentalacademy.com
  • -occurs nearly 2yrs earlier in girls than boys . -remains for 2-2 1/2yrs for both sexes. -Effected by genetic, environmental, sesonal and cultural factors. Major events during pubertal sprut 1]exchange from mixed to permanent dentition 2]acceleration in overall rate of facial growth 3]differential growth of jaws www.indiandentalacademy.com
  • Biological changes seen during puberty BOYS Stage1-Fat sprut intially maturing boy gains weight and becomes chubby Stage 2-Sprut in height and development of secondary sexual characteristics. Stage 3-Coincides with peak velocity with gain in height Stage 4-Spurt in height ends .Indicates that growth is complete. www.indiandentalacademy.com
  • GIRLS Stage1-Appearance of secondary sexual characteristics Stage2-occurs 1-1 ½ yrs later stage Stage 3-Marked by onset of mensturatiion.Growth is complete. www.indiandentalacademy.com
  • IMPORTANCE OF GROWTH SPRUT 1]offers best time for interceptive orthodontic procedures. Ex.mandibular retrognathism –activator maxillary prognathism-headgear mandibular prognathism-chincap with headgear maxillary retrognathism-facemask Activator Headgear www.indiandentalacademy.com
  • Chincap with Headgear Facemask A]Early maturing girls-pubertal sprut precedes final transition of dentition B]Slow maturing boys www.indiandentalacademy.com
  • 2]expansion-arch and skeletal 3]Excellent indicators for orthodontic treatment . 4]surgical correction There should be correlation between -skeletal age -dental age -chronological age -morphological age and onset of puberty. www.indiandentalacademy.com
  • Other uses -important to determine the efficacy of the therapy. -to determine the predictability and future growth direction -recognition and diagnosis of deviation from normal growth www.indiandentalacademy.com
  • www.indiandentalacademy.com Leader in continuing dental education THANK YOU www.indiandentalacademy.com