Cases Analysis Of Angle's Class ? And Class ? Malocclusion

Anteroposterior dysplasias is a common problem in orthodontic treatment,and it's also one of the most obvious aspects affecting the soft tissue profile of patients.The orthodontists usually solve Anteroposterior dysplasias by tooth extraction.Three kinds of clinical common malocclusions,which are Angle class ? and Skeletal class ?,Angle class ? and Skeletal class ?,Angle class and Skeletal class ??,are included.They all use non-extraction treatment.Case?: Patients with Angle class ? and Skeletal class ? who do not have teeth extraction.It's an early permanent dentition and high-angle case.We use headgear facebow to distalization upper molars to solve the crowding of the anterior teeth.When using the headgear facebow should pay attention to the direction of the force that is highpull extraoral traction.It will rotate the maxillary and maxillary dentition clockwise,and be helpful of controlling molar height.It will reduce the clockwise rotation of the mandible caused by pushing the molars distally and the retrognathia.After treatment,the soft tissue profile is straight,but the retrognathia is more obvious.It may be due to poor growth and development.Case?: Patients with Angle class ? and Skeletal class ? who do not have teeth extraction.We use Invisalign to distalization upper molars to solve the crowding of the anterior teeth.In addition to the advantages of aesthetics,hygiene,etc.,the Invisalign is more convenient than the fixed appliance in the molar distalization,because Invisalign don't need additional aids,and it causes less discomfort to the patient.The patient's treatment is not over yet,until now,the patient's soft tissue profile is straight and the patient have good bite,the crowding have solved,too.The parallelism of the roots and something others needs refined later.Case?: Patients with Angle class ? and Skeletal class ? who do not have teeth extraction.Fixed appliance treatment of Angle Class ? patients commonly increase the inclination of upper anterior teeth or retract lower anterior teeth.The major problem of this patient is anteriot crossbite.We used Damon 3MX,a major feature of passive self-ligating brackets is low friction,it's useful for Angle class ? patients with retract anterior teeth and early intermaxillary traction,and it can effectively adjust the Anteroposterior dysplasias and shorten the course of treatment.After treatment,the patient's soft tissue profile is straight and the patient have good bite.The orthodontic treatment of anteroposterior dysplasias doesn't completely rely on tooth extraction to provide spaces.For patients with early permanent teeth dentition,we can use headgear facebow or other retraction appliances to provide spaces.For patients without growth potential,it's important to choose a suitable appliance,Invisalign is good at distalization upper molars,fixed appliance with microscrews is also another choice.Three-dimensional control interacts with each other.Anteroposterior dysplasias not only a independent problem,but also mandibular rotation caused by vertical change affect on sagittal relationship,orthodontist should fully consider issues.