Now let's go to the classification of orthodontic appliances which are majorly divided into segments: 

 

 

1- According to design and application 

 

A- Removable orthodontic appliance.

B- Fixed orthodontic appliance.

C- Semi fixed orthodontic appliance .

 

2- According to the mechanism with which they generate or transmit forces:

 

A- Mechanical appliances.

B- Myofunctional appliances.

 

Removable Orthodontic Appliances

 

These are simple devices that can be inserted into and removed from the oral cavity by the patient at will with no difficulties.

 

It is usually indicated in simple cases of malocclusion.

 

         Mode of action:

There are many mode of action that could be executed by removable appliances which are as follows: 

 

1-Tipping movement: it applies to a single

point contact force to the crown.

 

2- Movement of block of teeth or against tooth movement.

 

3- Influencing the eruption of opposing teeth 

 

A-  A flat anterior bite plane( this causes overeruption of posterior teeth).

 

B- A posterior bite plane ( buccal capping) 

leads to intrusion of posterior teeth.

 

Components of Removable Orthodontic Appliances

 

There are three major components of a Removable Orthodontic Appliances namely as follows: 

 

1- Active component:  this component exert force to move the teeth and hence the name active.

 

2- Retentive components( also known as passive components).

 

This components helps to keep the other parts together without dislodging due to any resistance that could be met from any dental tissues. These components are known as CLASPS

 

Clasps usually act by engaging the undercuts.

 

Some examples of clasps include the following types: 

 

1- Adam’s clasp.

2- Southend clasp.

 

3- Ball-end clasp.

4- C-clasp.

5- Plint clasp.

6- Crozat clasp.

 

Now, let's dive into some of the aforesaid clasp types in orthodontics. 

 

1- Adam's Clasp: 

Adam's Clasp is a clasp made of 0.7 mm diameter hard round stainless steel wire.

 

It is composed of two points arrowheads, an intermediate bridge and two retentive arms.

 

 The two arrowheads engage and holds with the mesial and distal proximal undercuts of molar teeth.

 

The arrowheads are connected to the bridge which is 45 degrees inclined to the long axis of the tooth.

 

It is usually applied for retention on premolar, canine ,central incisor and deciduous molars

 

 

The Second one to be discussed is: 

 

2- Triangular Clasp 

 

A triangular clasp is constructed from 0.7 mm hard round stainless steel wire like most other clasps and it experts its retentive properties by engaging the interproximal undercuts(mesial and distal undercuts). They are usually employed where extra retention is needed.

 

3- South-end Clasp 

 

South-end clasp is a clasp used when retention is effectively required in anterior teeth.

 

It is also fabricated from 0.7mm diameter hard round stainless steel wire.

 

4 Ball-end Clasp 

 

Ball-end clasp as the name implies is a clasp constructed from 0.7 mm hard round stainless steel wire which engages and interacts with interproximal undercut and used when extra retention is needed as well just like same function as triangular clasp.

 

To avoid a very lengthy post,  this write-up would be concluded at this juncture and in the subsequent posts and continued in the subsequent write-ups and lectures. 

 

Thanks a lot reading through and Happy Sereying 🌴🦷🦷

 

Keeping Sereying and You will reach Beyond the Sky 💥💥💥

 

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