 Welcome back to another session on dentistry and more. So today's topic is tweets analysis. So far we have covered nouns analysis and stainless analysis. The third one is tweets analysis. Tweets analysis is basically based on inclination of mandibular incisors to the basal bone and also the association with the vertical relation of the mandible to the cranium. So the mandible, how much mandibular incisors are inclined to the bone and the vertical relation of mandible with the cranium. So in this analysis we have made a triangle by joining three lines. One is the mandibular plane line which is going tangential to the lower border of mandibular. The another one is our FH plane that is connecting porion and orbital A and the third one is the lower central incisor long axis. So we connected it and made a triangle. So this angle is known as FMA angle. It's nothing but Frankfurt mandibular plane angle. This is incisor mandibular plane angle and this is Frankfurt mandibular incisor angle. So let's see what is Frankfurt mandibular plane angle which indicates the direction of lower facial growth both horizontally and vertically. So this angle this indicates the direction of lower facial growth and in both directions like horizontal and vertical direction the mean value is 25 degree. Suppose if the value is greater than 25 degree it indicates vertical growth pattern and if it is less than 25 it indicates horizontal growth pattern and it ranges from 16 to 35 degree that is Frankfurt mandibular plane angle. The next one is incisor mandibular plane angle. It is joined by the mandibular plane and the lower incisor long axis. So which indicates the upright position of mandibular incisor is normal or not or the balance and harmony of lower facial profile. The upright position and balance and harmony of the lower facial profile. The mean angle is 87 degree. It ranges from 85 to 95 degree. The next one is Frankfurt mandibular incisor angle that is joining by the Frankfurt plane and the same lower incisor plane which indicates the degree of balance and harmony between the lower face and the anterior limit of dentition. The lower face and anterior limit of dentition and the mean value is 68 degree which ranges from 60 to 75 degree. So that is all about tweed analysis. We have three angles FMA, FMIA and IMPA. This is basically developed to help in treatment planning, anchorage preparation and other prognosis of ortholodic cases. Basically it uses three planes as we seen and make it a diagnostic triangle. So three planes it uses mandibular plane, FH plane and lower incisor angle. So this helps in various ortholodic procedures. So that's about tweed analysis. We have covered Downs analysis, Stiener's analysis and tweeds analysis. I will come up with another session on dentistry and more. Thank you.