 Hello everyone welcome back to a new session on dentistry mr today's topic is ankles classification and its modification it is a very simple chapter the classification of occlusion so the most commonly used occlusion is ankles classification and its two modifications will be dealt into this session so let's see what is ankles classification and its modification it's basically three types that is class 1 class 2 and class 3 so we know class 1 is basically a normal occlusion class 2 is proclined or a forwardly placed upper teeth and class 3 is forwardly placed lower teeth or forward mandible so the maceal buckle cusp will coincide with the buckle groove of lower teeth so this is upper first molar lower first molar so this classification is based on the molar relationship so the upper first molar the maceal buckle cusp will coincide with the lower first molar buckle groove the occlusion is proper but there will be the line of occlusion will be incorrect so it may coincide with the buckle groove but the line of occlusion is incorrect because there will be rotation malapose tooth and crowding in anterias so that is class 1 malocclusion whereas class 2 malocclusion this is little maceal replaced that is the maceal buckle cusp is not coinciding with buckle groove it is more maceal replaced so it is like distal portion of the distal buckle cusp is somewhat coming to the buckle groove of lower first molar so it has basically three types are as division one division two and subdivision so this is proclined upper instance you can see the macella is going forward because the macellar teeth is going forward usually this is your buckle cusp should be here but this is going forward instead the distal buckle cusp is coming in line with the buckle groove of lower first molar so what is division one division one is the basic proclination of upper teeth that is most of the teeth will be proclined the division dough is a little different that is retroclined central incisor and proclined lateral incisor in division one mostly the central incisor will be proclined but in division two it is lateral incisor which is in proclined position but mostly it is a skeletal class two so subdivision is one side either the right or left side it has class two and on the other side there is a normal occlusion that is subdivision so class one class two and class three class two has division one division two and division subdivision division one is proclined central division two is proclined lateral the client central and subdivision on either left or right side normal occlusion and other side class two so in class three the changes opposite of class two because the upper teeth is coming back side or the lower teeth is coming forwardly placed that is the meso-baccal cusp is placed distal to the disto-baccal cusp of lower tooth that is the mandible is going forward or lower teeth is going forward so this cusp is placed distal to the tooth so it also has three types that is basic last three pseudo class three and subdivision so this is nothing but the class three pseudo class three is when the patient going from rest to occlusion he changes the position to class three that is a functional placement to a class three that is cross part will be there so he purposefully moves mandible forward to make it a class three that is a pseudo class three actually it doesn't have class three but due to the functional placement it keeps it anteriorly so it becomes pseudo class three subdivision is nothing but just like in class two subdivision one side there will be class three and other side that will be normal occlusion so that is a basic ankles classification now let's move on to the modification so lecious modifications and device modifications are commonly asked for the exam the lecious modification is very simple just few names that is neutral occlusion disto occlusion and meso occlusion neutral occlusion is nothing but class one and disto occlusion is nothing but class two and meso occlusion is nothing but class three so how it is occluding that is the lecious modification the device modification is both for class one and class three it's not for class two class one it has five types and class three it has three types class one the type one is crowded maxillary anteris that is class one with crowded maxillary anteris type two is with proclined maxillary incisors type three is anterior cross part type four is posterior cross part and type five is meso version of molas so these are the five types of devious modification crowding proclination anterior and posterior cross bite and meso version of molas whereas in class three the type one is H2H type two is crowded mantibular teeth and type three is crowded maxillary teeth the maxilla size will be lesser and there will be anterior cross bite just a simple topic that is classification on its modification but is commonly asked for the university exam that is ankles basic three types all of you know the three types and its modifications so if you have any doubts please put it in the comment box and if any further topics you'd like to have classes on mention that also in comment box so I've come up with a new session on the industry and more thank you