GROWTH AND DEVELOPMENT OF MANDIBLE

welcome to MDS conquer online finish line goes for the first MBA students paper one today myself dr. Sethe uses free consultant author on this team MDS conquer going to discuss about prenatal and postnatal growth and development of the mandible this is the continuation of the previous videos which is which are describing the development of the face and also the development of the maxilla and as a general topic the development of the mandible and maxilla are discussed in other videos so I am now in this video I am only including the extra points which we have to write as in the orthodontic perspective and I am just giving a outline which contents are to be included in your answer for the prenatal and postnatal development of the mandible so you have to include the anatomy of the mandible and prenatal development of the mandible mandible at the time of birth postnatal development of the mandible mandibular rotations which are described in the previous video so you have to write from the growth rotations you the mandibular rotations which are discussed earlier and the development of the mandible in relation to various theories of the growth and the a changes in the mandible how they appear prenatally and in the infant age at the time of birth and in the adult and what are the various muscle attachments which are present and the clinical implications of the growth and development and what are the various developmental anomalies if you study these developmental anomalies as a part of this prenatal and postnatal development of the mandible itself you can answer the question which will come as an essay question or a 75 marks question that is various craniofacial deformities so the craniofacial anomalies of the maxilla and mandible should be included in the craniofacial deformities so I'm just running through the prenatal development of the mandible it develops from the mandibular arch and it is explained in the previous video and the importance of the meckel's catalyst should be definitely studied and this this Michael's cartilage alone can come as a seven max question so brief description of the Michael's cartilage is necessary and what is the time at which the Michael's cartilage appears that is a sixth week of in Torun life and the center of the ausf of the Michael Scott center of the ossification of the mandibular arch lies a de beside a mental foramen and most of the Michael's cartilage will disappear only a remnant of the metal miracles catalyst remains so you have to write about the fate of the Michaels cartilage and what are the extremities developed that is incus and man use or also developed in the Michael Scott life so it's alone can come as a seven max question then you have to include all the parts of Michael's cartilage and what it forms the mandible mandible major part is formed by the Michaels cartilage only okay next what are the other secondiy cartilages involved in the mandibular development so Michaels catalyst will form the ramus of the ramus in the body of the mandible whereas the other parts like kondal and coronoid are exceptionally secondary cartilages and the symphysis L cartilage present in the midline so you have to explain how they are formed so this is the condylar process which is formed at the 10th week so you have to explain the position of the condyle which is present away from the body of the mandible that is this is formed by the meckel's cartilage and this is the secondary cartilage which is fun and gradually attaches to the mandible this is the coronoid process and this is the condylar process so coronoid process will appear as 10 to 50 weak and the mantle region symphysis these are all the three are secondary cartilages so with this the prenatal development of the mandible will complete and at the time of the birth how the mandible appears so it is very short and you have to describe the mandible at the time of the birth and later postnatally that is after the birth it expands through V principle which is explained in the previous videos and another seven marks question may ask and you have to include in this question is the endless counterpart principle that is for every part there is an opposite counterpart which is growing at the same pace so maxilla and mandible are counterparts to each other and the middle cranial fossa is a counterpart to the Naza maxillary fossa so like this the counterpart principal growth equivalent concept runs and you have to read this and this is also a seven max question and the mandibular remodeling takes place by resorption and bone deposition deposit the in this picture pyrite arrows and the blue arrows they are measured and you have to individually each part should be described how the desorption takes place at particular part okay so the growth at the condyle how it takes place and what are the parts of the condyle articular cartilage and the growth cartilage the remaining of the growth cartilage acts as the second the cartilage for the rest of the period and this because of this region the functional appliance treatment plan can be run in the orthotics so that implication you have to include in the growth condyle next is the condyle and neck and this is also a specific part rather than the other other parts you have to explain how the condylar net also include get includes into the ramus of the body and how it gets into a shape in the form of a neck okay and next comes your sigmoid not coronoid process and growth if the ramus how it happens and angle of the mandible and angle of the mandible you have to write both outer surface and the lingual surfaces and the lingual tuberosity and how the anti corneal notch is formed okay because of the muscle pull the anti go neol notch is formed in the case of mandibular body of the mandible next comes um late mandibular growth so sometimes the postnatal growth of the growth and development of the mandible alone is asked so then after birth how the changes in every part of the mandible is explained and later you have to include certain articles regarding the late mandibular growth also what does late mandibular growth mean especially when compared to maxilla as the Civello caudal gradient mandible grows at a puberty age than maxilla maxillary growth restricts first and mandibular hood completes next so the one of the three events may occur and majority of the articles reported that the crowding is mainly because of the late mandibular growth and this point you have to include and these are the three events which are present and these two are the more important events that / incisors may play forward and opening of these spaces of the spaces between the maxillary teeth and lower incisors made distally this place in coming to the Remo of the chin this one also the chin will also develop only after the puberty age and that and the bone deposition takes place how it takes place everything bone remodeling of the chin should be explained and next is the annular process as the teeth emerges the whole inner process also remodeling takes place and this is the just a table which is explaining each and every surface where the bone deposition and bone resorption takes place resulting in which dimension that is the transverse dimension or the anterior-posterior or the vertical dimension so this table should be included in your answer in the case of postnatal growth of the mandible next this is the differential growth so at eight weeks how the growth takes place mandible is greater than maxilla but at the thirteen thirteen to twenty weeks maxilla is greater than mandible at the time of birth mandible tends to be retro Matic and early postnatal life the orthographic mandible will be present so next comes your rotation of the mandible during the growth these are already discussed we know growth rotations video so you can go through and you have to include in the case of twenty marks question you have to include the rotations of mandible next these are the eight changes in the mandible in infants what is the position of your mental foramen mandibular canal and angle of the mandible here the mandibular cannoli is concerned as a more stable point so you have to mention how it changes from infant to the adults and in the old age how the changes of the mandible are present next is the timing of the growth in the width length and height different dimensions of the growth of the mandible should be answered here and these are the various changes in girls and boys depending upon the gender differences also there are changes in your Mandeville you are timing and the at last a concept you have to include the muscle attachments totally thirteen muscles are present so you have to write order all the muscle attachments of your in the later surface and also on the medial surfaces of the mandible finally the clinical implication of growth in development here functionally how we can use the growth and development of the growth and development of the mandible in your orthodontic therapy so the functional appliances like activity by Anita chin cup and face mas can be used and these are the anomalies of the development so these anomaly these syndromes you can include in your answer of craniofacial deformities okay this is a brief description of your growth in development of the mandible and depending upon this you can develop your answer we are concerning to a particular number of marks 20 months or 70 from 20 bucks or seven marks question and this cannot be asked this and long answer this is only a seven MUX question or twenty marks question okay thank you