ORTHODONTIC RETAINERS PRESENTATION

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orthodontic appliance

Orthodontic retainers

https://www.healthline.com/health/retainers-after-braces

One of the most challenging phase for an orthodontist is to retain the corrections achieved during the course of orthodontic treatment. Retainers are passive orthodontic appliances that help in maintaining and stabilizing the position of teeth long enough to permit reorganization of supporting structures after the active phase of orthodontic therapy.

Introduction

01

what is orthodontic retainers?

Retainers are custom devices designed to hold your teeth in place. They're often prescribed after surgery or any method of realigning teeth , to keep your bite in place after it's been reshaped or corrected, usually made of wires or clear plastic there remains a lifelong risk of relapse due to a number of factors: recoil of periodontal fibres, pressure from surrounding soft tissues, the occlusion and patient’s continued growth and Development. By using retainers to hold the teeth in their new position for a length of time, the surrounding periodontal fibres adapt to changes in the bone which can help minimize any changes to the final tooth position after the completion of orthodontic treatment. https://en.m.wikipedia.org/wiki/Retainer_

Retainers

what is relapse?

Orthodontic relapses occur when teeth shift at any point after patients have completed their orthodontic treatment. Orthodontic relapse can be caused by an insufficient orthodontic treatment that did not address the skeletal misalignment that causes tooth misalignment.https://www.braciz.com/dental-problems/orthodontic-relapse-timonium-md/

Fixed appliance

Types of orthodontic retainers

Removable retainers

These are removable retainers that are molded to perfectly fit the new position of your teeth. They’re also called molded retainers. (The technical name for them is thermoplastic or vacuum-formed retainers.)To make this type of retainer, a mold of the teeth is created. A very thin plastic or polyurethane is then heated and sucked down around the mold

Also called wire retainers, these are removable retainers made of thin metal wire and plastic or acrylic shaped to fit the roof of your mouth or along the inside of your lower teeth. The attached metal wire runs across the outside of your teeth to maintain alignment.

Hawley retainer

Clear plastic reatainer

Components:plastic or acrylic with metal wire

REMOVABLE APPLIANCE

https://www.healthline.com/health/do-braces-hurt#removal

Permanent retainers consist of a solid or braided wire that is curved to fit the shape of your newly straightened teeth. The wire is cemented (bonded) to the inside of your front teeth to keep them from moving. Most often used on lower teeth, they are also called fixed, lingual wire, or bonded retainers. They can’t be removed except by your orthodontist or dentist.

Fixed Appliance

Pros and Cons of removable appliances

ADVANTAGES OF REMOVABLE APPLIANCE:1)Effective for simple malocclusions 2)Smaller anchorage requirement3)Uncompromised oral hygiene4)Short chair side time5)Ease of adjustment.DISADVANTAGES OF REMOVABLE APPLIANCES1)Dependant on patient compliance 2)Unable to perform complex malocclusion 3)Difficulty in speech4)Prone to breakage and loss

ADVANTAGES OF FIXED RETAINER1)Reduced need for patient co-operation2)Can be used when conventional retainers cannot provide samedegreeof stability.3)Bonded retainers are more esthetics4)Can be used for permanent and semi permanent retention. 5)Do not affect speech.DISADVANTAGES OF FIXED RETAINERS1) Increased chair side time 2)More expensive3)Loss of healthy tooth material 4)Tend to discolour

Pros and Cons of fixed appliances

REFERENCES1. Melrose C, Millett D. Toward a perspective on orthodontic retention? American Journal of Orthodontics and Dentofacial Orthopedics 1998; 113(5):507-14.2. Knierim R. Invisible lower cuspid to cuspid retainer. The Angle Orthodontist. 1973;43(2): 218-203. Zachrisson, BU: Long-term experience with bonded retainers: update and clinical advice. J ClinOrthod. 41, 2007, 728–737.

Retainers forms an integral part of orthodontic treatment. Compared to removable retainers,fixed retainers have shown to have better treatment stability. However more clinical trials have to be carried out to prove the efficiency of both removable and fixed retainers.

Conclusion

Team members:Athar amro waad abdulqaderHala joudehSara abu hamadReman nofal

supervised by:dr.shorouq daraysieh

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