OPERATIVE DENTISTRY II NEET MDS INICET MDS Quick Revision WE ARE WITH YOU - TEAM MDSCONQUER

hi this is dr srikant from team mds conquer now we are going to have a quick recap of operator industry so the first important thing that you have to make a note when you're talking about the mandibler first premolar okay the mandibular first premolar is whenever you do a preparation in mandible or first premolar make a note you should have a slight tilt okay that is basically due to the lingual inclination of this particular teeth and make a note about this particular criteria okay so the enamel must be supported by sound dentin enamel rods which forms the cable surface angle must have their inner ends rested on sound dentin enamel rods forming the cable surface margin should be covered with restoration always and make a note your angular cable surface angle should be trimmed always so these are the four criteria that you have to make a note and the next one is preventive resin restoration so basing upon the extent and the depth they are categorized into type a type b type c so please go through what is type here what is type b on top what is type c and simonson has uh advocated a type of sealant in each type of category that is we learned a b c right so a is generally you go for an unfilled sealant okay where the fillers are less whereas b is a combination of both unfilled and filled and whereas c is a filled composite resin means you will have more filler content in the c and the next one these are the few scientist names that you have to make a note the first one is the prophylactic odentotomy was given by height and the restorative material that is used in this is uh initially they have they used amalgam and followed by the final registration is done by oxyphosphide cement oxyphosphate cement or restoration okay so fischer eradication was given by make a note make a note of the scientists bisima was given by okay make a note of these scientist names which are frequently asked questions so coming to the wedging techniques i hope you're very familiar with the three types of wedging techniques so this is the wedging techniques where two wedges are used okay so this is most commonly used in the case of a measles side of the maxillary first molar because of the presence of fluids in the root near the gingival area so you can see the two types of edges they can ask a diagram based question also over this the second one is double wedging here two edges are used in opposite direction one from the buccal and one from the lingual you can see this double wedging technique and the next one is called as in a piggyback so piggyback they will give you the diagram based question as this in this cross section you have two wedges of two different sizes one is larger which and the second one is the smaller wedge so when you have to use this is indicated in the case of a shallow proximal box with ginger russian this is a this is an indication case where you go you're going to use this particular type of veg so coming to xylitol again is the most commonly asked question this is a phi carbon sugar alcohol so it helps in reducing the lactic acid that is produced by the bacteria the two things that helps in that that plays an important role one is it helps in increasing the buffering capacity of the saliva it helps in minimizing the demineralization decreasing the demineralization and also helps in increasing the dementialization so make a note it also helps in increasing so this these types of gums which are useful in the case of your white spot lesion helps in the initial treatment of white spot lesion the next one is cpp acp okay so most of you are familiar with this cpp acp cpp icp plus that is called as tooth mousy or tooth mousy plus the plus means nothing but additional fluoride a normal one will have no fluoride if you if you use a word plus means the fluoride content is extra so how much fluoride content is extra it is very simple that is 900 ppm of 0.2 percentage of sodium fluoride is an extra okay i hope you are well familiar with cpp acp which we have learned in the smart videos the next one types of fischer these are the different types of fissure they can ask you which type is more common or more prevalent so this is the one that is the first common and this is the two that is the second most common okay that's picked visual sealants this is a this is an area of questioning okay what are the first generation second generation third generation fourth generation fourth generation question is repeated in 2018 2019 fourth generation is fluoride releasing first generation is uv second generation is self cure or chemical cure third generation is visible light the next comes indications and contraindications of pitot and fusion sealants and most of them are very familiar just go through this table the next comes is chemo mechanical preparation the two important things that most of you are well familiar is carried x and k resolve and the new thing that is added to the list yesterday i have posted a three or four lines of notes regarding the papa kerry so which is extracted from papaya okay so the solvent contents to please do make a note and slight differences okay so slight difference mixing is not required in the case of papa carry so please all these three carry salt carry decks and papa kerry are very very important regularly ask questions are 0.5 percentage of nacl one percentage of nucle okay they can ask you the ammonia acids that are present in this they can ask you the ph values ph values are almost the same they can ask you the die is absent here whereas you can see a die that is present here and here okay which of the following is in liquid state this is the liquid state so all these things are very very important please do make a note okay so uh carries risk assessment tests are very very important i request personally go back to your pp books okay the entire notes of carry carries accurate test was clearly given so please do check it and this is one which is most important that is the cinder test so please do make a note about the uh about the changes and this and other one is salivary reductase test okay so most of these questions these two are most commonly repeated by giving the time and by uh asking you the caries activity the next goes again this question is repeated in 2018 and 2019 what is type which type is used okay so if they ask like a rt is used in both the types better go with nine as an answer okay so nine type nine gic is used in art okay so they can ask you what is pitch and figure type what is what is looting type looting type and registration type are most commonly asked questions the next comes with a few modifications of the composites and most of you are well familiar with this if you have a confusion over this please do check these slides which are more than sufficient this is components how the compoomers are differ from normal composites okay so these are the most commonly asked questions in your mock examinations i hope you are done with them what is geomer geometer is a combination of glass and number cement with the composite few few words okay so just to make a note what is uh fluoride recharging capacity okay so what is fluoride recharging capacity how a restoration when it which helps in releasing of the fluorides when it loses the fluorides how we are going to recharge so just go through the literature that is given okay so please do these are organically modified ceramic restorations ceramics please do silorence okay all these comes under your smart materials and most of you are well familiar what is smart composite add a note of this and what is the advantage of smart composite so they can ask you this diagram based questions over the recent smart materials this is an elastic post that is a fiber reinforced composite which helps in uh preparing the partial i mean like temporary fixed partial dentures okay self-healing composite what is what is the catalyst that is used uh what are the what is the element that is present in the micro capsule and these are the questions which are given in 2018 neat exam most of the questions on smart materials okay so what is the resistance form okay so flat pulpal floor in a sound tooth structure to resist the forces directed in the long axis of the teeth and to provide a strong stable restoration so this is a basically definition of restorative resistance form okay so please do make a note what what are the things which are required for the resistance form and the retention form so balancing so uh like if you see the long axis the if they see the long axis the the blade of the instrument should not be more than one to two millimeters it should not be more than one to two limit two millimeters this is how a balance is provided when the instrument is used amalgam bonding agents i hope you are well familiar tooth and the bonding between the uh the dental structure and the amalgam is mechanical bonding so to improve the bonding a bonding agent is add which bonds to that of the teeth structure as well as to that of amalgam that is called as amalgam bonding agents and the best example of amalgam bonding is in sardis what is sandwich technique you have open sandwich technique close sandwich technique open sandwich technique in which you'll have it you you have your gic facing outside okay so open sandwich is a gac you can see gic is opened outside close sandwich in which the gic which is present towards in the inner side is inside it's not outside so your composite will be outside and gic will be inside here your gic will be outside so when we use an open sandwich technique is whenever you want a fluoride release at that particular area whenever you want some sort of remineralization at that particular area go for this sandwich techniques what is cause of failure cause of failure means same failure or loss of bond between the same is called as cement cement this is cement this is cement this is called as coriosophial addison failure is the interface between the thing this is the different thing and this is the cement so adhesive is a failure is different failure between different objects and curse of failure is failure between the same objects and most of you are well familiar with eight ivory number eight this is ivory number eight matrix and this is ivory number one very simple eight this this looks like eight eight is higher number one and the previous one is it looks like one one looks like eight and eight looks like one okay again these are the diagram based questions these are the particular types of forceps which helps in removing the rotor instruments gg drills and your silver points from the root canal you can see these beaks these beaks are prepared in such a way that you can hold and you can remove it okay mounts classification mount is called as father of minimal invasive dentistry or minimal minimal invasive registration so in which the class class has two numbers one point one or some one one or one point two something like that one means minimal moderate enlarged and extensive one means here one means it is a fitted fissure set two means a contact area that is a proximal surface three means cervical one third and this is icd's classification so please do make a note about the terminologies that are useful for the coding okay this is zero one two three four five and six so this is a pick which is taken from the students latest edition so they can ask you the diagram based question they can give you this and they can ask you which coding it is it is six and what is the treatment the treatment procedure is minimal restorative treatment in all the cases because treatment varies from individual to individual basing upon the risk low risk moderate risk high risk and extreme risk so for four five and six okay the treatments are minimal invasive restoration for all the categories of individuals and coming to the three three it is the sealant or a minimal invasive same for all okay whereas coming to one two and three there is a variation in the treatment plan according to the risk of the patient so risk assessment is very very important the next one is terminal preparation so they can ask you diagram based questions related to the terminal preparation so what is the angle of bur that is used internal preparation that is 45 so you're going to keep and you're going to access means you're going to uh you're going you're not going to disturb the marginal reach this is the marginal rich but you are going to access the lesion which is present on the proximal surface by using the bur in 45 degrees angulation so these are the c factors i can these are these are regularly discussed around the group okay don't worry c factors they can ask you the c factor values okay and of course these are new things and familiar things they can ask a diagram based question over the dental operating microscope they can give this schematic representation so these are eyes these are lens okay this is an assembly that is prism assembly this is a binocular objective and monocular objective this is this is this is the object so then they can ask you what is the object lens what is the reference lens and everything and uh one more important thing that you have to make anyway we have learned about this during our micro surge micro surgery at the endodontics so what is the magnification and what is the associated resolution i feel like this is very tricky to understand but nowadays they're giving such questions like formulas and everything because we have seen a question in 2020 neet about formula parklands formula was given from general surgery so this is one of the important formula that when when they're when they're planning to ask a question over the dental operating microscope okay so don't don't try to understand it as of now just try to remember the formula because any chance it may come in the examination that is the focal length of binocular that is called as flb focal length of objective length that is f l o l ips power ep and the magnetic magnification factor mf okay so the total magnification can be represented by tm that is total magnification is equal to is equal to f l b by f l o l into i power into magnification factor this is a formula that you have to make a note you have to remember this remember this okay so in some situation they can give you a formula by giving all the values okay all the values i power and everything asking you to find the total magnification so this is a mathematical thing if you remember the formula you can just include all those values so please do make a note of this learn this mug up this okay maybe unfortunately if you get a question so you're going to get that extra benefit and coming to i was always stressing about this careers risk assessment so what are the things that to be done in the case of an office based treatments and in the case of a home based therapist like what are the precautions everything has to be taken so in high risk moderate risk and low risk please do make a note of this and now i'll try to recap some diagrams and i hope you are well familiar with the chair positions uh the universal chair position is 11 o'clock that is called as right rare so what is what are the different things just make a note make a note of it and coming to this this is an air abrasive aerab resource system okay so they can ask you a diagram based question on a rubberized resistor and this is how the air abrasive system equipment uh the schematic representation is they can ask you the different terms and terminologies they can ask you the particle size which is previously asked they can ask you the air pressure again this is question is as they can ask you the angle of attachment okay so there are few other things like duration motion and everything so it's just do make them they can ask you the distance are they gonna give you the diagram and they're can ask you any question over this area so please do make a note of this and the next goes are the instruments which you are well familiar with so please do make a note of these instruments okay so the first one the these are the examples of chisels one is striped chisel okay the second one is middle stack chisel okay and the third one is bin angle chisel okay so the next comes is uh the hatchets okay so the first one this is hatch your gmd's the next comes is the burs and the dimensions of course questions are previously asked on this area in 2017 examination 169 l bar is important 245 bar is important and of course of course these 271 and 272 are important so please do make a note of this burst their sizes and the dimensions the next comes is is of course is of course the excavators just to make a note this is an angle former do make a note this is how i think this whole hose is given as a diagram based question one of the examination recently c is a dental file uh and do make a note of all these diagram based stuff okay these are different sizes of purse okay uh shapes of bursts signing off dr srikanth from team mds concord