Відео

2:40

THE VIDEO IN TEXT. thank me later :) The facial features of the human embryo develop rapidly very early on in pregnancy. Beginning around the 4th week after conception. Many of the structures originate from a group of cells called cranial neural crest cells. These cells move in a distinct pattern from a neural tube located in the back of the embryo to create the various structures of the face. During the first 3 days of development the fertilized ovum is located in the fallopian tube as it travels it undergoes rapid division to form a cluster of cells called c=mórulas. These cells organize themselves to form the blastocyst and by the end of week 5 the fully formed blastocyst comes into contact with the uterine wall for implantation. During the second week of development, the inside of the blastocyst know as the embryoblast, becomes 2 layers: Hypoblast Epiblast Together these layers form an oval-shaped disc-like structure. In the 3 weeks of development, a streak is created on the surface of the epiblast during which time, the cells of the epiblast detach and migrate. These migrating cells create the layers: ectoderm mesodermo endoderm which go on to contribute cells to form all the tissues and organs in the human body. In the thor to fourth week of the development a cord and notochord is formed. This induces the cells in the overlying ectoderm to thicken, forming a region called the neural plate along the back of the embryo . The edges of the neural plate elevate to form the neural fold that eventually fuse to form the neural tube. During this process neural crest cells are formed along the entire length of the tube at the tip of the folding neural folds. Neural crest cells formed from the, or cranial region, are called Cranial Neural Crest Cells, or CNCC’S. These cells multiply and soon start migrating over long distances in distinct paths, from the back of the embryo towards the front of the embryo. Once they arrive at their target destinations in the facial regions CNCC.S further develop and mature and ultimately contribute to a substantial amount of the structures in the head and neck regions such as bones, cartilages, and nerves. Growth migration and subsequent differentiation of CNCC’S are critically important for proper development of the normal structures of the facial regions. Soon after the CNCC/s reach their final destinations the facial features begin to take shape externally. By the fourth week of development the embryo is characterized by 5 facial swelling frontonasal prominence paired maxillary and mandibular prominences These structures are formed in part from the migrations and proliferations of the CNNCs from different regions of the neural tube. In a five week embryo the maxillary and mandibular prominence enlarge and grow forward and towards the middle eventually giving rise to the upper and lower jaws respectively. In a six week old embryo the 2 mandibular prominences fuse to form the lower jaw to which lead to form the cheeks and corners of the mouth. At this point the outline of the mouth is visible. The philtrum of the upper lip and palates are also created at this time. In the next few months the development of the initial cartilaginous skeleton of the face is replaced by bone and there is an overall increase in shape and size of the different structures of the face. From the child to adulthood continuous to develop through further growth and remodeling

This is truly intriguing ❤❤

Great instructor!! Thank you Dr. Stokl

Very helpful, thank you

Burs used ?

اويلي تجننن

Why do that to a healthy tooth?

They deserve a new building

Why you use TR bur on labial surface ? Instead of TR ? Bcz in PFM crown the labial marging should be shoulder ?😊

I was looking for videos for a baby and this was surprisingly goos

excellent video it is!! appreciate the effort put by the team.......i wish to see detailed video for individual part of oral cavity with such animation from embryonic development till adulthood😄😄

سبحان الله!❤

سبحان الله .. قال الله تعالى . و في أنفسكم أفلا تبصرون . ?ALLAH -GOD- said : And in yourselves. Then will you not see Quran (51:21)

Amalgam dolgular çürük gibi duruyor. Hem de içeriğinde civa var diye biliyorum. Kaliteli kompozit yapılmalı

When can I put cementum and varinsh ?

thanks

My heart hurts when i saw that the video is from Toronto university, my dream university.. I’m second year dentistry student in my country but im still dreaming of going to it.. i guess one day ☝️

Ммми ииррт ииииииии. Тоооо

So hate myself to abort my own kids just for convenience before my knowing and believing Jesus! Darwinism and evolutionism are co-murderers of millions and trillions of aborted children.

I hate amalgam. But unfortunately that's what we do the majority of the time at work.

🎶 'Promosm'

1:03 Implanation takes place between 6-12 days after fertilization not "by the end of week 5".

Embryology

Which bur u used...??.

Danger !!!

Thank you so much ❤

One of the best teachers ever !

Great video for the dental students. I wish I had watched this video before the exam

thank you very informative nice

1. The placodes are of mixed origin,,, NC and induced ectoderm. And 2. The bones of the face are membranous, not cartilaginous. There are underlining structures that support the facial skeleton that start out cartilaginous, and replaced with bone, like Meckelian cartilages that get wrapped in a membranous bone that becomes ossified into the dentary, but the bones of the face pretty much are without a cartilaginous stage in development.

Just amazing 👏

Rat kiti ahe

Everything seen in this video happened by chance over billions of years and happened to work for us, and it’s all driven by genetic information.

0:58 Implantation occurs on day 5, not week 5.

I find it interesting that the brain begins to develop before the face and contributes to its characteristics. Just fascinating.

Aese hi lagaye rakho shugal mela

Ustaad Maza aagya

That's not week 5, it's day 5.

Voldemort

Described 80% of embryology in 5 minutes. May the Patron Saint of Step 1 bless the ground you walk on.

this video is informative but what I 've observed is, that there is a point were we all looked like cursed inosuke like at 3:26 6 week embroyo

This is amazing

Excellent video. Thank You. 🏹🎯

Look like caterpillar at start

Somethin went wrong on the seventh week for me smh

Right here is where I was made ugly right here

fascinating

Amalgam filling is toxic never put in your mouth

Subhanallah