Mandibular Prognathism is limited to the lower jaw , with protruding expression of the mandible , or jaw. Mandibular defines upper Prognathism bite ( upper jaw protruding ) vs mandibular prognathism underbite ( lower jaw protruding ) .
Causes of Prognathism
Mandibular Prognathism or progenism , is caused by the development of the mandible leading to occlusion of the jaw . Mandibular prognatism develops as a result of several factors, including child osteogenetic disorders , mechanical factors ( malocclusion , ) and heredity. The vast majority of people have prognathism due to normal variation among phenotypes .
Asymmetric mandibular prognathism has varied causes, but is most often caused by excess growth of the mandible ( condylar head) , and temporomandibular joint disorder ( TMJ)
Mandibular prognathism Symptoms
Mandibular prognathism (MP) is a skeletal Class III malocclusion, while prognathic mandible is one of the hardest , jaw and facial deformities to define. In medical terms , this is called the jaw prognathism and type III occlusion .
Prognathism causes the lower jaw to stand in front of the upper jaw , pushing the lower jaw forward. Mandibular Prognathism can close your teeth , and move the lower teeth to cover the upper front teeth.
In this disorder, mandibular nodules rest among the first lower molars and second premolars . Mesiobuccal nodules of molars should meet at the junction of the third molar. Mandibular prognathism throws the whole compound ( lining ) in mesiobuccal cusp out of whack .
Mandibular prognathism lower protrusions can also cause the face to appear long in patients .
Surgical treatment of mandibular prognathism
Typically , patients need surgery to correct the alignment of the lower jaw. Surgery procedure for lower prognathism determines the level of bite , teeth, bones and other physical conditions . Crowding is treated with orthodontics , often with tooth extraction , dental braces , and after growth in children or modified jaw surgery ( orthognathic surgery) in adults.
Traditionally , mandibular prognathism treatment takes three steps:
- Year orthodontic treatment
- Corrective jaw surgery ( surgery to switch the lower jaw back and then braces to align the teeth of both jaws together)
- Followed by another year of orthodontic treatment
However, during the period prior to orthodontic surgery , the jaw is more protruding and teeth malocclusion worsens . Orthognathic surgery in conjunction with orthodontic treatment is required to correct the adults MP. Medicinal treatment includes surgery using Castro technique , which uses extra- oral approach that leaves an inconspicuous scar. The operation lasts up to 3 hours . During the surgical period braces often remain on the teeth.
Recovering after mandibular prognathism surgery
Orthodontic treatment after surgery is needed to recover from the lower jaw surgery. You need braces after surgery to ” decompensate ,” meaning that the teeth are in an ideal position , so once surgery is done, things fit together.
After surgery, the yet-to – be stabilized occlusion accelerated recovery time from wafer braces , the name of occlusion fixation equipment. Depending on the severity , wafer devices can quickly correct mandibular prognathism by itself , in patients at an early age without surgery done.
Will Dental Insurance Cover prognatism treatment?
Orthognathic surgery is very expensive. For surgical procedures , it can sometimes be covered under their health insurance instead of dental insurance. My surgery was covered under my insurance and medical savings, but it took me a long time to figure out how to get my surgery subsidized .
Prognathism in dogs and other animals
Mandibular prognatism affects people , but also occurs in certain breeds of dogs such as boxers and Shih Tzus . Gorillas have a natural facial structure which is described as a lower prognathism , that is, their lower protrudes further out than the jaw.
* Maloclusion : ( . Smaller lower jaw , growing above the upper teeth ) , Mandibular prognatism causes movement of the teeth , a condition known as malocclusion.