Maxillary sinus anatomy

hi everyone myself dr. CT team MDS conquer so the next important topic from your Anatomy is a maxillary sinus for your basics paper so we'll be discussing this in this particular presentation so first the contents include for this particular topic if it comes as an essay it's write always better to write the contents so which include the introduction development microscopic fishes Anatomy the blood supply the lymph lymphatic drainage the nerve supply the relations to the adjacent structures followed by the functions and the applied aspects okay lastly the conclusion and references so this is how you have to write the contents so let's start the introduction so it's also called as the mastery and row or entre off high mode and it becomes apparent by the 17th today in in utero or in Caltrain life it becomes apparent by the 17th today itself so it's a paid sinus its largest paranasal sinus and it is present within the maxillary bone so this is how you can start the introduction so coming to the development so it is exactly I have given the exact sequence of how it is being developed so please do note it so if you write it as a flow chart by keeping arrows in between it's very much fetching okay so the development initially it follows a marvel or morphogenetic events in the differentiation of the nasal cavity later horizontal shift of the palatal shifts occur followed by the fusion of cells with one another followed by that nasal septum separates the oral cavity from the two sections of the nasal chambers then presumably influences expansion of the lateral nasal wall and the wall again begins to fold followed by braces pre nasal conchae and the tree nasal or the sub adjacent meters are being formed the inferior and the superior meatus remains like a shallow depressions in the first half of the entire trying life and later the middle meatus expand into the lateral nasal wall so the inferior and the superior meatus actually remain like the shallow depressions whereas the middle meatus actually expands into the let then the cartilaginous skeleton of the lateral nasal capsule exactly gets established followed by that expansion of the middle meatus into occurs in a inferior direction which is occupying more of the maxillary bone and at the end the Missouri sinus gets established so this is how you provide the descriptive sequence or the entire sequence you can follow which is given in in this particular presentation or you can have a look in your in the basing or the embryology textbook okay so at birth actually it is the size of a small pea then it starts increasing in its size so about 7 to 8 a.m. until posteriorly 3 to 4 mm ideo distally 4 to 6 mm high and 6 to 8 ml in volume so it again if the teeth starts erupting it descends downwards okay so it is tubular at birth so this shapes that's very good if you're right so it is actually this tubular shape in in the birth over you're in childhood and pyramidal in Edel's okay the shapes of the maxillary sinus you need to mention okay ultimately the size exactly determines or it depends upon the head 'try factors so it actually continues to go throughout their life so next coming to the microscopic features it has three distinct layers so we are done with the development part so development of Magdala sinus is very important so you have to write the sequence followed by the how it does size at the birth and also the shape at the birth followed by the shape at the childhood and the adults all these you need to mention later you have to write the microscopic features which has three distinct layers that is epithelial layer the basal lamina and the sabapathy layer layer so the epithelium is actually pseudostratified columnar or ciliated and it is derived from the olfactory epithelium and it provides motile apparatus to the sinus epithelium the cilia actually provide the motile apparatus to the epithelium of the sinus okay this is little microscopic features next cunning coming to the anatomy so here you have to end the microscopic features now then you have to enter to the anatomy you can draw a diagram of showing the nasal cavity as well as the sinuses the pate sinuses the pyramid shape okay so the anterior wall is a facial structure of the other facial surface of the maxilla infraorbital canal deflects the roof onto the anterior wall and it is related to the facial surface of the cheek by the canine fossa as seen in the diagram later the roof it is a thin orbital plate of the maxilla which separates orbit and contents from the sinus okay it is the roof so we are done with anterior wall and the roof annex coming to the base it forms a medial wall of the antrum it separates from the nasal cavity it is usually thin and it is convex towards the sinus and where it forms an aperture called as a here it is semilunaris and it is reduced in size by thick mucosa of the nasal cavity so this is the base next coming to the floor floor is nothing but that a lower part of the maxilla so the adults four to five and below the floor of the nose the children it corresponds to that of the nasal flow and the roots of the maxillary teeth we know it provides or it produced elevations into the flow when we see a in the radiograph we can see the maxillary molar roots are being elevated within the flow so that's nothing but the floor of the maxillary sinus so you have to write the AL anterior wall the roof the base and the floor next coming to the Austrian of the antrum so it opens into the nasal cavity and it is situated at the highest part of the medial wall and it opens in wire middle meatus and it varies in its shape okay this you have to write again and coming to the blood supply it is the superior alveolar branch of the maxillary artery and the branches of the greater Palatine artery and the venous drainage is from the parathyroid plexus the lymphatic drainage through aa stem into the nasal cavity and infraorbital foramen ultimately goes to the submandibular lymph node so this is how you have to write the lymphatic drainage okay and next coming to the relationships is superiorly to the orbit and its contents medially to the nasal cavity and inferiorly that is below to the maxillary molars and also the alveolar process of the maxilla so this is how we have to write detail anatomy of the main structure of the Missouri sinus its lymphatic drainage is blood supply and its relations so coming to the functions functions is like it lightens the skull weight the important function and also it is resonator on it modifies the voice so it acts as a resonator and it modifies the voice okay so next also it serves as an insulator to prevent the cold air from cooling down the surrounding parts and it helps in shaping the front part of the skull and positioning the orbit orbits in a binocular vision and provides thermal insulation for the brain ends also increase the area of olfactory membranes so all these other functions you can just write one line functions no need to give any description is only for your knowledge sake after it in here but it's of no need only the important the one which is given in yellow color if you write it's more than enough okay the other functions are besides all these it includes some sort of shock absorbers for the skull and also it secretes mucus to keep the nasal cavity moist and it helps in floatation of the skull in the water so these are the various different functions of the maxillary sinus you have to write it even if it is asked in anatomic question you have to write the functions it will increase the bulk of the answer as well as it affects your marks okay daughter diagrams if you can draw the diagrams along with the relations if you can explain by neat label diagram it will be really attractive to the examiner okay so next coming to the developmental anomalies it Luke and I just named these three the a genesis a pleasure and i population okay later you have to write the inflammatory conditions a sinusitis the famous so for the most commonly seen condition is a maxillary sinusitis so what could be the inflammatory conditions and what could be the non-infectious like the elegy or any exposure to chemicals and all that so you can write the infectious as well as non-infectious causes of the maxillary sinusitis and also you can give a mild description of the symptoms that the patients will have heaviness over the sinus and when he bends ahead he has more of pain or pressure on the sinus and also he has radiating pain over the maxillary molar roots of the maxillary molars so all those symptoms you can write okay so in increase the size of your answer so that's it students so you can write this references in conclusion you can guide the magneri sinus is a pyramidal structure which is present in the maxillary or in the face middle part of the face which is very important and you can write a bit of its functions and you can end up the answer okay and then you can give these references if you can code any article if you have gone through any article or it related to magneri sinusitis you can write rest if these references are enough and even if you can write the grey's anatomy as well so but any two textbooks and two articles are enough for the basics paper okay