Types of Removable Retainers
- Hawley, Vacuum-formed, Begg, and Barrer are types of removable retainers.
- Removable retainers can be worn part-time or full-time as advised by the orthodontist.
- Removable retainers are easier to clean compared to fixed retainers.
- Hawley retainers are one of the oldest types of removable retainers.
- Hawley retainers consist of metal wires surrounding the anterior teeth.

Hawley Retainers
- Hawley retainers can be adjusted to finish treatment and minor movement of anterior teeth.
- Hawley retainers allow for various adaptations and additions.
- Hawley retainers have inferior aesthetics and may interfere with speech.
- Aesthetic versions of Hawley retainers with clear wires have been developed.
- Research shows Hawley retainers are not effective for preventing incisor irregularity relapse.

Vacuum-formed Retainers
- Vacuum-formed retainers are made of polypropylene or polyvinylchloride material.
- They are virtually invisible when worn, offering an aesthetic advantage.
- Vacuum-formed retainers cover the occlusal surfaces of the teeth.
- They are commonly worn overnight and removed while eating.
- Vacuum-formed retainers may lead to decalcification of teeth if worn while eating or immediately after a meal.

Begg Retainers
- Begg retainers allow occlusal settling without wire work crossing the occlusion.
- They can be worn during eating but are less retentive than Hawley retainers.
- The labial bow of Begg retainers is more prone to distortion.
- Begg retainers are robust enough to be worn during eating.
- Begg retainers are used to realign minor lower incisor relapse.

Barrer Retainers
- Barrer retainers carry acrylic bows both labially and lingually.
- The original Barrer appliance extended only to the canines.
- Cribs on the first molars have been added to prevent swallowing or aspiration.
- Barrer retainers can be used to realign minor lower incisor relapse.
- Spring retainers are another name for Barrer retainers.