THEORIES OF GROWTH (ORTHODONTICS)
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- Опубликовано: 30 июл 2024
- ➡️Brodie in 1940s and it states that craniofacial growth is controlled by genetics. This theory states that genes such as Homeobox, Sonic hedgehog, Transcription factor and IHH (protein) play an important role in craniofacial development.
➡️This theory was popularized by Sicher in 1941 which states that sutures are the primary determinant of the craniofacial growth. Expansion forces at the sutures lead to expansion of bone and thus growth of craniofacial skeleton. Cranial vault increases in size via the primary growth of bone that happens at the suture.
➡️ Sicher theorized that tissues such as periosteum Cartilage and sutures are growth centers just like epiphysis of the long bone that allow the bone to form. He said that growth of maxilla happens at expansion of the circumaxillary sutures which push maxilla down and forward. Evidence says that sutures are growth sites that respond intrinsically to signals.
Cartilaginous theory-In this theory, mandibular condyle having cartilage at its end allows the downward and forward growth of the mandible.
➡️Maxilla, consisting of the nasal septum and nasomaxillary complex, which is made up of cartilage, moves forward and downward also by the forces from the nasal septum.
➡️functional matrix hypothesis explicitly claims that the origin, growth and maintenance of all skeletal tissues are always secondary, compensatory and obligatory responses to temporally and operationally prior events or processes that occur in specifically related non-skeletal tissues, organs
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Awsome explaination doctor 👌💓💓
Thank you😊
Sir every theory is well described.. But plz sir turned off or remove this high loud introduction music in all your video... This is so loud for ear...
Thank you and i understand the music problme.Infact it was removed after awhile ago. Sorry for the inconvenience
Thank u sir...ye topic bahot achese samjh aa gaya muje...
Plz make more videos on ortho topics ...
Thank you😊. Kindly check the playlist for more videos
Good.. but energy is low
why there is resorption in one side and the deposition in the other side not in the same side?
What if the resorption and deposition happens on the same side? There will not be any net growth in effect
If deposition happens on the other side, growth happens with simultaneous movement of the bone towards deposition side.
@@Dentistrynmore in such cases what cause the resorption ?
@@azouz5675 mainly by osteoclasts on resorption side and osteoblast in deposition side.
@@Dentistrynmore Many thanks
@@azouz5675 welcome