Maxillary sinus (anatomy & Histology)

hi - this is dr. Street hunt from Team MDS conquer now I'm going to discuss about maxillary sinus so in the first part I'm going to talk about an autumn and astrology mostly relevant to your examination point so the other word that is commonly used for the maxillary sinus is anthem of high mode why because high mo is the person who has given it for the first step so it is called as anthem of high mode and the second important point to be added is maxillary sinus opens into middle meatus okay so maxillary sinus is an eighth space that is present in the maxilla and communicates with the an ornament outside mainly with middle meatus the opening of max little sinus is present in the middle meatus and the regularly asked question is the shape of maxillary sinus okay depends upon the ace but normal shape of maxillary sinuses pyramid Agra okay so during the development of maxillary sinus it has different shapes so they can ask you at birth it will be tubular in the childhood it will be all wide but adult size it will be pyramidal and they can ask you which of the following teeth is present very near to the maxillary sinus during the development during the development it is maxillary connect okay so during the wide shape the tooth which is present near to the sinus is max very cunning but regularly asked question is in the adult so in the adult it is maxillary first molar I hope you are clear right so they can ask you the size shape of the site shape that is tubular at birth or wide at childhood and pyramidal in the parent so next course is a few aspects related to the histology as we already discussed it is a pyramidal body which is present within the body of the maxilla and lining of maxillary sinus is the most commonly asked question your jungle histology that is pseudo stratified ciliated columnar epithelium you can see the Celia okay but you can see the nucleus at friend levels so it is called as pseudo stratified ciliated columnar epithelium but it is a single lining but which looks like stratified so it is called as pseudo stratified ciliated columnar epithelium so this is another word that you can add because this is once - as a question the lining of maxillary sinus is also called as and recently as din neat that is the volume of maxillary sinus is 20 to 30 ml okay so recently asked in 2019 what is the volume of maxillary sinus is a simple question and followed by this question is given in comet king okay so the dimensions of maxillary sinus is 35 into 26 into 32 okay so the dimensions were already asked in the comet kay so just make a note of it and they can ask you the thickness of the body wall that is surrounding the maxillary sinus that is 2 power 2 to 5 millimeters in most of the pathological conditions there will be thinning of this wall okay leading to the expansion or leading to the invasion of the maxillary sinus right so the thickness is 2 point 2 to 5 millimeters and it will be thinning in many of the pathological issues that we are going to discuss in further parts okay next comes is the boundaries the boundaries were asked in different ways like they can ask you it is always 6 mega node it is 1 2 3 4 5 6 okay basically the other mode of representation of the boundary seized by base apex roof fluor anterior wall and posterior wall or they can ask you in this way it's very simple the base is so the base of this triangle will be pointed towards the lateral wall of the nose okay so that is the median one so this is the base which is pointed towards the lateral wall of the nose okay next one the apex is the opposite one okay the apex is the opposite one so the apex is pointed towards the webex is pointed towards the zygomatic process of the maxilla okay so the epics is pointed towards the zygomatic process of that maxima and they can ask you the roof the roof is this one okay the roof is by the floor of the orbit and they can ask you the floor the floor is by the your teeth that is the Eldar process okay they can ask your roof floor Epic's base or medial or lateral and anterior and posterior walls and already spider facial aspect of the maxilla okay this one and posterior wall is the max let it show porosity I hope it's very clear so it has six parts base apex roof floor and the wall and posterior wall right done so these are the important boundaries that you have to make you know when you're talking about the anatomy of maxillary cells and opening okay so as already discussed the opening of maxillary sinus means the natural opening of maxillary sinus if you consider this one as a sinus the opening will be present in the middle meatus okay so as the natural opening is present in the middle meatus if there is any accumulation of the fluid it cannot be drained it has to fill up to this level to get it out right so that is the reason why whenever you plan any anthro to me or whenever you want to keep a hold imaginary sinus keep in the inferior Maharis so that the drain is will be easy so the natural opening that is ostium of the maxillary sinus is present in the middle meatus whereas the artificial opening which is done during the intro to me is done in the inferior meter so don't get confused natural is present in the middle so you do artificial in the inferior right okay the next comes is the functions of maxillary sinus which is well known by you in your oral history that is due to the air-filled spaces they reduce the weight of the skull they help in the voice resonance they help in warming the area and humidification their axes in a shock observer of the skull and they observes the pollutant allergens or any any such stuff and traps the battery and that mucus okay and known functions no need to write them again and again these are common known functions of your oral history okay few things are common I'm going to mark important aspects in the red color which has to be noted done if you feel something new apart from what you already know please write them don't write heavy heavy notices by making your stuff tough to read in the last few days revision is important right so you have to do multiple rounds of revision if you have to multiple rounds of revision you need to focus more on the memory based aspects okay so next one is the blood supply okay so the blood supply goes with the facial artery infraorbital artery and the greater palate or not whereas your drainage will goes with the facial and the tech or plucks of strains okay now supplies mostly by the branches of the maxillary artery and drainage is by the submandibular lymph nodes okay so that's the reason why in a few cases of your maxillary sinusitis you can see lymph adenopathy these lymph nodes are going to have some sort of swelling or they become tender

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