Orthodontics دکتر هادی درویش پور 0 user comments 13 January 2019

What is malocclusion?

Malocclusion is the unordinary condition of teeth and jaw. It is generally hereditary and passed down from parents to children but the role of environment is also effective. Untreated malocclusion causes periodontal disease, tooth decay and temporomandibular joint disorder (TMJ).

The role of genetic in development of malocclusion

The form and size of upper and lower jaw, the size of face and teeth mostly transfer through genetic from one generation to the next.

The role of environment to develop malocclusion

The main environmental factors that causes malocclusion is baby tooth decay or early milk teeth loss or sucking thumb beyond age 2.

More addition, environmental factors that causes malocclusion are predictable and can be control by dentist.


What are different categories of malocclusion?

Type one

Peoples with natural eclosion who their teeth are paired normally are category in type one.

Type two

People who are in this category have small lower jaw. The upper jaw and teeth severely overlap the bottom jaw and teeth.

Type three

Peoples who are in this category have big lower jaw. The lower teeth are forward and causes lower jaw and teeth overlap than upper jaw that called cross bite.

What is open bite?

open bite

The space between teeth of upper jaw with lower jaw called open bite.

What is deep bite?

deep bite

when the upper front teeth almost completely overlap the lower front teeth called deep bite.

Use of devices to improve malocclusion

There are two devices for this matter:

fixed orthodontic

The fixed appliance is made up brackets and bands that attach to the teeth. These brackets make pressure to the teeth and gently move teeth to the proper position.

To achieve better results of fixed appliance, patients should observe the oral hygiene and brush their teeth more than before.

Removable orthodontic

Removable appliance is made of plastic (acrylic) and steel wires to treat facial and jaw disorder.


A specialist orthodontist considers different treatment depending on types of malocclusion:

  • Correcting teeth position by installing bracket
  • Teeth corrective jaw surgery
  • Arranging teeth after jaw surgery
  • Jaw reduction surgery
  • Stabling jaw bone by attaching arch bars

Prevention in children

It is almost impossible to prevent hereditary malocclusion. But it is possible to control items that causes changes in growth and progress of jaw in childhood like limiting the excessive pacifier use by child or replacing it by orthodontic pacifiers, sucking thumb or nursing bottle more beyond age three.